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Search Results (1,051)

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Keywords = amyotrophic lateral sclerosis (ALS)

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17 pages, 774 KiB  
Review
Perceived Pain in People Living with Amyotrophic Lateral Sclerosis—A Scoping Review
by Debora Rosa, Laura Ingrande, Ilaria Marcomini, Andrea Poliani, Giulia Villa, Martina Sodano and Duilio Fiorenzo Manara
Nurs. Rep. 2024, 14(4), 3023-3039; https://doi.org/10.3390/nursrep14040220 (registering DOI) - 17 Oct 2024
Abstract
(1) Background: Pain is a common symptom in patients with Amyotrophic Lateral Sclerosis (ALS). There are no evidence-based pharmacological treatments for pain in ALS; recommendations are based on guidelines for chronic non-oncological pain and clinical experience. The aim is to map the literature [...] Read more.
(1) Background: Pain is a common symptom in patients with Amyotrophic Lateral Sclerosis (ALS). There are no evidence-based pharmacological treatments for pain in ALS; recommendations are based on guidelines for chronic non-oncological pain and clinical experience. The aim is to map the literature on how people with ALS experience pain, and how this affects their daily activities and social relationships. (2) Methods: This scoping review included studies concerning patients with spinal/bulbar ALS aged ≥ 18 years who experience pain, focusing on perception, characteristics, treatment, and impact on quality of life. Temporal and linguistic criteria were applied when searching the MEDLINE, CINAHL, and SCOPUS databases. (3) Results: The management of pain in these patients is complex and involves the use of anti-inflammatory drugs, analgesics, and opioids. Pain is associated with other conditions such as depression and anxiety, which contribute to a deterioration in the quality of life. Moreover, pain may also negatively influence patient compliance with prescribed treatment regimens and the quality of care they perceive themselves to be receiving. (4) Conclusions: It is of the most importance to identify effective ways to assess and treat this issue, with health care professionals taking an active role in this process. Full article
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<p>PRISMA flow diagram.</p>
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14 pages, 1787 KiB  
Article
Systemic Innate Immune System Restoration as a Therapeutic Approach for Neurodegenerative Disease: Effects of NP001 on Amyotrophic Lateral Sclerosis (ALS) Progression
by Michael S. McGrath, Rongzhen Zhang, Paige M. Bracci, Ari Azhir and Bruce D. Forrest
Biomedicines 2024, 12(10), 2362; https://doi.org/10.3390/biomedicines12102362 - 16 Oct 2024
Abstract
Background/objective: Amyotrophic lateral sclerosis (ALS) is a diagnosis that incorporates a heterogeneous set of neurodegenerative processes into a single progressive and uniformly fatal disease making the development of a uniformly applicable therapeutic difficult. Recent multinational ALS natural history incidence studies have identified systemic [...] Read more.
Background/objective: Amyotrophic lateral sclerosis (ALS) is a diagnosis that incorporates a heterogeneous set of neurodegenerative processes into a single progressive and uniformly fatal disease making the development of a uniformly applicable therapeutic difficult. Recent multinational ALS natural history incidence studies have identified systemic chronic activation of the innate immune system as a major risk factor for developing ALS. Persistent immune activation in patients with ALS leads to loss of muscle and lowering of serum creatinine. The goal of the current study was to test whether the slowing of nerve and muscle destruction in NP001-treated ALS patients compared with controls in phase 2 studies would lead to extension of survival. Methods: Phase 2 clinical studies with NP001, an intravenously administered form of the innate immune system regulator NaClO2, are now reporting long-term survival benefits for drug recipients vs. placebo controls after only six months of intermittent treatment. As a prodrug, NP001 is converted by macrophages to taurine chloramine, a long-lived regulator of inflammation. We performed a pooled analysis of all patients who had completed the studies in two six-month NP001 phase 2 trials. Changes in respiratory vital capacity and the muscle mass product, creatinine, defined treated patients who, compared to placebo, had up to a year of extended survival. Conclusions: The observed longer survival in ALS patients with the greatest inflammation-associated muscle loss provides further evidence that ALS is a disease of ongoing innate immune dysfunction and that NP001 is a disease-modifying drug with sustained clinical activity. Full article
(This article belongs to the Special Issue Neurodegenerative Diseases: From Mechanisms to Therapeutic Approaches)
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<p>Innate immune destruction of the neuromuscular junction (NMJ) leads to loss of muscle and respiratory function and death. (<b>A</b>) The motor neuron axon outgrowths interact with the muscle at the neuromuscular junction (NMJ, red circle) (images licensed from istock). This is the site where inappropriately processed disease-associated proteins such as TDP43 are recognized by the innate immune system and begin the process of motor neuron and muscular dysfunction. (<b>B</b>) Loss of NMJ function leads to muscle loss (images licensed from Shutterstock). In addition, the acute phase reaction consumes muscle as a source of rare amino acids, such as phenylalanine, tryptophan, and tyrosine, turning normal muscle into a wasted sarcopenic muscle. Blood creatinine levels quantify the muscle as a source of APP amino acids, and CRP levels increase. (<b>C</b>) The diaphragm is innervated by the phrenic nerve, an outgrowth of a lower motor neuron (images licensed from Shutterstock). VC measurements indirectly measure the function of the NMJ.</p>
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<p>NP001 efficacy defined by survival analysis and % VC change in phase 2A and 2B completers. (<b>A</b>) Kaplan–Meier curve of survival probability for patients who received NP001 at a dose of 2 mg/kg compared with placebo in completers. In the completers, the median survival (95% confidence interval (CI)) over the entire follow-up duration was 38.6 months (95% CI: 29.9, 47.8) and 28.4 months (95% CI: 25.4, 40.0) in the 2 mg/kg NP001 (blue) and placebo (red) groups, respectively (log-rank, <span class="html-italic">p</span> = 0.04). Patients treated with NP001 had better survival than those on placebo: hazard ratio (HR) = 0.72 (95% CI: 0.52, 0.99). (<b>B</b>) Kaplan–Meier curve of survival probability for patients who received NP001 at a dose of 2 mg/kg compared with placebo in completers with CRP &gt; 1.13 mg/L at baseline. In the completers with baseline CRP &gt; 1.13 mg/L, the median survival (95% confidence interval (CI)) over the entire follow-up duration was 42.7 months (95% CI: 31.3, 50.9) and 28.4 months (95% CI: 24.4, 40.0) in the 2 mg/kg NP001 (blue) and placebo (red) groups, respectively (log-rank, <span class="html-italic">p</span> = 0.002). Patients treated with NP001 had a significant benefit of survival than those on placebo: hazard ratio (HR) = 0.57 (95% CI: 0.39, 0.82). (<b>C</b>) Change in % of VC from baseline over 6 months in participants on NP001 compared with placebo in completers with high CRP at baseline. Percentage VC change from baseline for participants treated with NP001 (<span class="html-italic">n</span> = 72, blue) is compared with the placebo group (<span class="html-italic">n</span> = 83, red). Bars represent mean of % VC change from baseline ± SEM. Average %VC lost over the 6 months of study: NP001: −9.1% (−1.5% per month); placebo: −12.9% (−2.2% per month). The NP001 treatment arm lost 29% less respiratory function than the placebo arm by the end of the study (Wilcoxon test, <span class="html-italic">p</span> = 0.02).</p>
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<p>Box and whisker plots depicting the distribution of baseline serum creatinine values for the low creatinine group (baseline creatinine &lt; 71 µM/L for males or &lt;53 µM/L for females) (<span class="html-italic">n</span> = 57, in blue) and the high creatinine group (baseline creatinine ≥ 71 µM/L for males or ≥ 53 µM/L for females) (<span class="html-italic">n</span> = 98, in red). Results show that the median baseline creatinine value was statistically significantly lower in the low creatinine group compared with the high creatinine group (Wilcoxon test, <span class="html-italic">p</span> &lt; 0.0001).</p>
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<p>NP001 efficacy defined by % VC change by creatinine groups in phase 2A and 2B completers with baseline plasma CRP levels &gt; 1.13 mg/L. (<b>A</b>) Change in % of VC from baseline over 6 months in participants on NP001 compared with placebo in those with low creatinine at baseline in completers with CRP &gt; 1.13 mg/L. Percentage VC change from baseline for participants treated with NP001 (<span class="html-italic">n</span> = 25, blue) compared with the placebo group (<span class="html-italic">n</span> = 32, red). Bars represent mean of % VC change from baseline ± SEM. Average %VC lost over the 6 months of study: NP001: −9.7% (average −1.6% per month); placebo: −18.2% (average −3.0% per month). The NP001 treatment arm lost 46% less respiratory function than the placebo arm by the end of the study (Wilcoxon test, <span class="html-italic">p</span> = 0.02). (<b>B</b>) Percentage change from baseline in VC over 6 months in participants on NP001 compared with placebo in those with high creatinine patients with CRP &gt; 1.13 mg/L at baseline. Mean change from baseline in percent VC for participants treated with NP001 (<span class="html-italic">n</span> = 47, blue) compared with the placebo group (<span class="html-italic">n</span> = 51, red). Bars represent mean of % VC change from baseline ± SEM. There was no significant difference between NP001-treated patients and placebos by the end of the study (NP001 = −8.7% vs. placebo = −9.5%) (Wilcoxon test, <span class="html-italic">p</span> = 0.30).</p>
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<p>Overall survival by low and high creatinine groups in phase 2A and 2B completers with baseline plasma CRP levels &gt; 1.13 mg/L. (<b>A</b>) Kaplan–Meier curve of survival probability for patients who received NP001 at a dose of 2 mg/kg (blue) compared with placebo (red) in the low creatinine group. The median survival (95% confidence interval (CI)) over the entire follow-up duration among those with low serum creatinine at baseline was 45.5 months (95% CI: 28.5, NA) and 28.4 months (95% CI: 24.1, 40.3) in the 2 mg/kg NP001 and placebo groups, respectively (log-rank, <span class="html-italic">p</span> = 0.005). The associated hazard ratio (HR) was 0.41 (95% CI: 0.22, 0.78). (<b>B</b>) Kaplan–Meier curve of survival probability for patients who received NP001 at a dose of 2 mg/kg compared with placebo in the high creatinine group. The median survival (95% confidence interval (CI)) over the entire follow-up duration was 38.6 months (95% CI: 29.9, 50.9) in the NP001 treatment and 29.3 months (95% CI: 20.8, 44.1) in the placebo group (log-tank, <span class="html-italic">p</span> = 0.17) with the associated HR 0.73 (95% CI: 0.46, 1.1).</p>
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<p>ALS is a systemic innate immune disease: NP001 resets the self-regulatory cycle in ALS patients, mitigating loss of muscle function (images licensed from BioRender). The innate immune system is balanced between activating inflammatory signals and resolving signals after the process initiating the inflammation has been resolved. (<b>A</b>) Inflammation yields the oxidative molecule HOCl, which is rapidly neutralized within macrophages (MO) by free taurine, creating chloramine (TauCl). TauCl reverses inflammation, and the resulting phagocytic wound healing cell makes factors that shut down inflammation. (<b>B</b>) In ALS, misfolded proteins (MFPs) such as TDP43 are recognized at the neuromuscular junction by cells in the peripheral immune system, causing inflammation. In ALS patients, there is insufficient production of regulatory molecules, allowing inflammation to persist and damaging the NMJ, leading to both neuronal and muscular damage to progress unabated. (<b>C</b>) NP001 is converted by inflammatory cells into HOCl, then TauCl, providing an augmentation to the TauCl pathway. In addition, excess HOCl causes dimerization of alpha-2 macroglobulin (Alpha 2-M), creating a high-affinity clearance structure for misfolded proteins such as TDP43. The dimer releases a preformed TGFB1, a known regulator of NFkB, to enhance the resolution process [<a href="#B22-biomedicines-12-02362" class="html-bibr">22</a>]. Re-establishment of innate immune balance slows the loss of muscle and vital capacity, leading to the prolongation of survival.</p>
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12 pages, 735 KiB  
Article
The Effectiveness of NP001 on the Long-Term Survival of Patients with Amyotrophic Lateral Sclerosis
by Bruce D. Forrest, Namita A. Goyal, Thomas R. Fleming, Paige M. Bracci, Neil R. Brett, Zaeem Khan, Michelle Robinson, Ari Azhir and Michael McGrath
Biomedicines 2024, 12(10), 2367; https://doi.org/10.3390/biomedicines12102367 - 16 Oct 2024
Abstract
Background/Objectives: The aim of this study was to estimate the effect of a 6 months’ treatment course of the innate immune modulator NP001 (a pH-adjusted intravenous formulation of purified sodium chlorite), on disease progression, as measured by overall survival (OS) in patients with [...] Read more.
Background/Objectives: The aim of this study was to estimate the effect of a 6 months’ treatment course of the innate immune modulator NP001 (a pH-adjusted intravenous formulation of purified sodium chlorite), on disease progression, as measured by overall survival (OS) in patients with amyotrophic lateral sclerosis. Methods: Blinded survival data were retrospectively collected for 268 of the 273 patients who had participated in two phase 2 placebo-controlled clinical trials of NP001 (ClinicalTrials.gov: NCT01281631 and NCT02794857) and received at least one dose of either 1 mg/kg or 2 mg/kg of NP001 as chlorite based on actual body weight, or placebo. Kaplan–Meier methods were used on the intent-to-treat population to estimate survival probabilities. Results: In the overall population, the median OS was 4.8 months (2.7 years [95% CI: 2.3, 3.5] in the 2 mg/kg NP001group and 2.3 years [95% CI: 1.8, 2.9] in the placebo group). Hazard ratio (HR): 0.77 (95% CI: 0.57, 1.03), p = 0.073. Among patients aged ≤ 65 years, the median OS for the 2 mg/kg NP001 group was 10.8 months (3.3 years [95% CI: 2.4, 3.8] in the 2 mg/kg NP001 group and 2.4 years [95% CI: 1.7, 3.3] in the placebo group). HR: 0.69 (95% CI: 0.50, 0.95). No differences were observed in the 1 mg/kg NP001 group or in patients aged > 65 years. Conclusions: The findings from this study suggest that a 6 months’ treatment course of NP001 resulted in a 4.8-month increase in overall survival in patients with ALS. The findings from this study indicate that targeting inflammation associated with the innate immune system may provide a pathway for new therapeutic options for the treatment of ALS. Full article
(This article belongs to the Section Immunology and Immunotherapy)
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<p>Kaplan–Meier curve of survival probability for patients who received NP001 at a dose of 2 mg/kg of chlorite compared with placebo. Blue line: 2 mg/kg dose, median survival 2.7 years (95% CI: 2.3, 3.5); red line: placebo, median survival 2.3 years (95% CI: 1.8, 2.9).</p>
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<p>Kaplan–Meier curve of survival probability for patients ≤65 years old who received NP001 at a dose of 2 mg/kg compared with placebo. Blue line: 2 mg/kg dose, median survival 3.3 years (95% CI: 2.4, 3.9); red line: placebo, median survival 2.4 years (95% CI: 1.7, 3.3).</p>
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<p>Kaplan–Meier curve of survival probability for patients &gt;65 years old who received NP001 at a dose of 2 mg/kg compared with placebo. Blue line: 2 mg/kg dose, median survival 2.2 years (95% CI: 1.7, 3.4); red line: placebo, median survival 2.1 years (95% CI: 1.6, 3.4).</p>
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13 pages, 1315 KiB  
Article
An Effective DNA Methylation Biomarker Screening Mechanism for Amyotrophic Lateral Sclerosis (ALS) Based on Comorbidities and Gene Function Analysis
by Cing-Han Yang, Jhen-Li Huang, Li-Kai Tsai, David Taniar and Tun-Wen Pai
Bioengineering 2024, 11(10), 1020; https://doi.org/10.3390/bioengineering11101020 - 12 Oct 2024
Viewed by 415
Abstract
This study used epigenomic methylation differential expression analysis to identify primary biomarkers in patients with amyotrophic lateral sclerosis (ALS). We combined electronic medical record datasets from MIMIC-IV (United States) and NHIRD (Taiwan) to explore ALS comorbidities in depth and discover any comorbidity-related biomarkers. [...] Read more.
This study used epigenomic methylation differential expression analysis to identify primary biomarkers in patients with amyotrophic lateral sclerosis (ALS). We combined electronic medical record datasets from MIMIC-IV (United States) and NHIRD (Taiwan) to explore ALS comorbidities in depth and discover any comorbidity-related biomarkers. We also applied word2vec to these two clinical diagnostic medical databases to measure similarities between ALS and other similar diseases and evaluated the statistical assessment of the odds ratio to discover significant comorbidities for ALS subjects. Important and representative DNA methylation biomarker candidates could be effectively selected by cross-comparing similar diseases to ALS, comorbidity-related genes, and differentially expressed methylation loci for ALS subjects. The screened epigenomic and comorbidity-related biomarkers were clustered based on their genetic functions. The candidate DNA methylation biomarkers associated with ALS were comprehensively discovered. Gene ontology annotations were then applied to analyze and cluster the candidate biomarkers into three different groups based on gene function annotations. The results showed that a potential testing kit for ALS detection can be composed of SOD3, CACNA1H, and ERBB4 for effective early screening of ALS using blood samples. By developing an effective DNA methylation biomarker screening mechanism, early detection and prophylactic treatment of high-risk ALS patients can be achieved. Full article
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<p>Flow chart showing the pipeline of exploring functional representative biomarkers by integrating primary biomarkers from DNA methylation analysis and secondary biomarkers from related comorbidity patterns.</p>
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<p>Pipeline operations to discover primary DMP biomarkers by using GEO methylation profiling data.</p>
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<p>Functional annotation results of the nine candidate biomarkers. The horizontal axis represents the number of genes corresponding to each function. The purple, yellow and green legends were the corresponding annotation results of candidate biomarkers in three main ontologies: biological processes, cellular components, and molecular functions. The red legend represents the annotation results of KEGG biological pathways.</p>
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9 pages, 879 KiB  
Case Report
Multisensory Stimulation in Amyotrophic Lateral Sclerosis Disease: Case Report of an Innovative Proposal through Immersive Virtual Reality
by Ángel Casal-Moldes, Pablo Campo-Prieto, Gustavo Rodríguez-Fuentes and José Mª Cancela-Carral
Appl. Sci. 2024, 14(20), 9238; https://doi.org/10.3390/app14209238 - 11 Oct 2024
Viewed by 337
Abstract
Physical–cognitive stimulation has emerged as a promising strategy for improving the quality of life of patients with amyotrophic lateral sclerosis (ALS). This case study reports on the use of immersive virtual reality (IVR) as a tool for multisensory stimulation in a woman with [...] Read more.
Physical–cognitive stimulation has emerged as a promising strategy for improving the quality of life of patients with amyotrophic lateral sclerosis (ALS). This case study reports on the use of immersive virtual reality (IVR) as a tool for multisensory stimulation in a woman with ALS (76 years old; 11 years since diagnosis; stage 2). The program consisted of IVR stimulation sessions (three sessions per week for 12 weeks). The results showed that the implementation of the program was feasible and safe (no adverse symptoms on the Simulator Sickness Questionnaire), as well as easy to execute (>80% on the System Usability Scale). Additionally, the participant reported improvements in aspects related to her mental health (44% depression and 20% anxiety) and improvements in her quality of life, and she also maintained her values in her functional capacity. This study presents novel and important findings by demonstrating the feasibility of implementing physical–cognitive stimulation programs with IVR in a person with ALS, allowing for multisensory stimulation with commercially available hardware and software and the generation of benefits in their health-related quality of life and mental health. Full article
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<p>Experimental design and study characteristics.</p>
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<p>Screenshots of some virtual scenarios proposed for first contact with IVR: (<b>a</b>) virtual living room in <span class="html-italic">Alcove</span> experience; (<b>b</b>) inside the virtual guided visits tours settings in Europe; (<b>c</b>) participant in sitting position and interacting with the head-mounted display.</p>
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10 pages, 934 KiB  
Article
Sleep Disturbances in Amyotrophic Lateral Sclerosis and Prognostic Impact—A Retrospective Study
by Filipa Silva, Joelma Silva, Sofia Salgueira, Ana Mendes, Elsa Matos and Bebiana Conde
Life 2024, 14(10), 1284; https://doi.org/10.3390/life14101284 - 11 Oct 2024
Viewed by 341
Abstract
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease associated with sleep disturbance, namely insomnia and sleep-disordered breathing. This study aims to evaluate the overall sleep characteristics of ALS patients, their association with lung function tests, and possible predictive survival factors. We conducted a [...] Read more.
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease associated with sleep disturbance, namely insomnia and sleep-disordered breathing. This study aims to evaluate the overall sleep characteristics of ALS patients, their association with lung function tests, and possible predictive survival factors. We conducted a retrospective observation study among ALS patients monitored during a pulmonology consultation. Type one polysomnography (PSG) and lung function tests were performed once the patients presented with sleep-related symptoms, and the relationship between their parameters was assessed, as well as a survival analysis. We included 35 patients, with an overall diminished sleep efficiency, a partially conserved forced vital capacity (FVC), and low maximal inspiratory pressure (MIP). A positive correlation between FVC and REM sleep percentage was observed. A survival analysis showed that a normal rapid eye movement (REM) sleep percentage and respiratory disturbance index (RDI) ≥ 15/h were independent predictors of survival. We observed a trend for higher sleep quality in patients with conserved lung function. A better sleep quality was associated with a higher survival. Obstructive events (reduced or absence of airflow associated with continued or increased inspiratory effort) did not seem to impact survival. Full article
(This article belongs to the Special Issue Insights into Obstructive Sleep Apnea)
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<p>Correlation between lung functional and sleep parameters: Epworth sleepiness scale, respiratory disturbance index (RDI), sleep efficiency, and rapid eye movement (REM) sleep percentage. (<b>A</b>) Correlation between forced vital capacity (FVC) and sleep parameters. (<b>B</b>) Correlation between maximal inspiratory pressure (MIP) and sleep parameters.</p>
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<p>Kaplan–Meier survival analysis, according to ALS type of onset (<b>A</b>), RDI (<b>B</b>), SE—sleep efficiency, (<b>C</b>) REM sleep percentage, and (<b>D</b>) stratification.</p>
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34 pages, 1880 KiB  
Review
A Review of Biomarkers of Amyotrophic Lateral Sclerosis: A Pathophysiologic Approach
by Rawiah S. Alshehri, Ahmad R. Abuzinadah, Moafaq S. Alrawaili, Muteb K. Alotaibi, Hadeel A. Alsufyani, Rajaa M. Alshanketi and Aysha A. AlShareef
Int. J. Mol. Sci. 2024, 25(20), 10900; https://doi.org/10.3390/ijms252010900 - 10 Oct 2024
Viewed by 386
Abstract
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease characterized by progressive degeneration of upper and lower motor neurons. The heterogeneous nature of ALS at the clinical, genetic, and pathological levels makes it challenging to develop diagnostic and prognostic tools that fit all disease [...] Read more.
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease characterized by progressive degeneration of upper and lower motor neurons. The heterogeneous nature of ALS at the clinical, genetic, and pathological levels makes it challenging to develop diagnostic and prognostic tools that fit all disease phenotypes. Limitations associated with the functional scales and the qualitative nature of mainstay electrophysiological testing prompt the investigation of more objective quantitative assessment. Biofluid biomarkers have the potential to fill that gap by providing evidence of a disease process potentially early in the disease, its progression, and its response to therapy. In contrast to other neurodegenerative diseases, no biomarker has yet been validated in clinical use for ALS. Several fluid biomarkers have been investigated in clinical studies in ALS. Biofluid biomarkers reflect the different pathophysiological processes, from protein aggregation to muscle denervation. This review takes a pathophysiologic approach to summarizing the findings of clinical studies utilizing quantitative biofluid biomarkers in ALS, discusses the utility and shortcomings of each biomarker, and highlights the superiority of neurofilaments as biomarkers of neurodegeneration over other candidate biomarkers. Full article
(This article belongs to the Special Issue From Molecular Insights to Novel Therapies: Neurological Diseases)
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<p>Pathophysiology of amyotrophic lateral sclerosis. The interaction of genetic, epigenetic, and environmental factors triggers mutations and stress conditions, which induce mislocalization or misfolding of intracellular proteins. Mislocalized and misfolded proteins are capable of self-seeding and cross-seeding other proteins into toxic aggregates. These aggregates disrupt axonal transport, mitochondrial respiration, and the clearance of damaged proteins, induce glial activation, and sequester proteins essential for RNA processing. Deregulated processing of the EAAT2 mRNA transcript reduces the expression of the transporter, leading to excessive glutamate concentration, subsequent excessive calcium influx, and overproduction of ROS, which further induce glial activation and creates a continuous cycle of mislocalization and misfolding of the proteins as well as activation of enzymatic pathways which propagate neuronal injury. Calcium overload and oxidative stress disrupt glutamate uptake by astrocytes and axonal transport and contribute to mitochondrial failure, leading to energy depletion, which induces altered proteostasis and the continuation of the cycle. Astrogliosis triggers blood-brain barrier (BBB) disruption and macrophage infiltration, leading to neuroinflammation. These converging mechanisms result in neurodegeneration, which stimulates astrogliosis through released inflammatory and cytotoxic mediators. Neurodegeneration propagates across motor neurons, leading to the disassembly of the neuromuscular junctions and the denervation of skeletal muscles. EAAT2: excitatory amino acid transporter 2; ROS: reactive oxygen species.</p>
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<p>Summary of deregulated RNA profile in amyotrophic lateral sclerosis. Aberrant RNA processing in ALS is attributed to biogenesis defects and/or miRNA transcriptional changes predominantly caused by altered proteostasis as the toxic aggregates alter RNA Splicing, capping, polyadenylation, and transport and disrupt miRNA biogenesis via altering stress granule dynamics. A profile of deregulated miRNAs is illustrated here based on experimental and clinical studies of abnormal levels of several biomarkers linked to neuronal, excitotoxic, inflammatory, and muscle-related mechanisms. EAAT2: excitatory amino acid transporter 2; GLAST: glutamate aspartate transporter; SLC1A2: solute carrier family 1 member 2; Th17: T helper 17 cell.</p>
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<p>Availability of candidate biomarkers for amyotrophic lateral sclerosis in biofluids. Several pathogenic mechanisms lead to the release of ALS-related biomarkers either passively or actively. Many of these are in high abundance in the CSF from ALS patients, but the invasiveness of CSF sampling limits research recruitment and subsequent longitudinal measurement. Similarly, multiple ALS-related biomarkers can be measured in the blood with less invasive sampling. The availability of biomarkers in the urine is limited by filtration restriction of proteins with high molecular weight. BBB: blood–brain barrier; BSCB: blood–spinal cord barrier; CSF: cerebrospinal fluid.</p>
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20 pages, 15259 KiB  
Article
Real-Time Home Automation System Using BCI Technology
by Marius-Valentin Drăgoi, Ionuț Nisipeanu, Aurel Frimu, Ana-Maria Tălîngă, Anton Hadăr, Tiberiu Gabriel Dobrescu, Cosmin Petru Suciu and Andrei Rareș Manea
Biomimetics 2024, 9(10), 594; https://doi.org/10.3390/biomimetics9100594 - 1 Oct 2024
Viewed by 570
Abstract
A Brain–Computer Interface (BCI) processes and converts brain signals to provide commands to output devices to carry out certain tasks. The main purpose of BCIs is to replace or restore the missing or damaged functions of disabled people, including in neuromuscular disorders like [...] Read more.
A Brain–Computer Interface (BCI) processes and converts brain signals to provide commands to output devices to carry out certain tasks. The main purpose of BCIs is to replace or restore the missing or damaged functions of disabled people, including in neuromuscular disorders like Amyotrophic Lateral Sclerosis (ALS), cerebral palsy, stroke, or spinal cord injury. Hence, a BCI does not use neuromuscular output pathways; it bypasses traditional neuromuscular pathways by directly interpreting brain signals to command devices. Scientists have used several techniques like electroencephalography (EEG) and intracortical and electrocorticographic (ECoG) techniques to collect brain signals that are used to control robotic arms, prosthetics, wheelchairs, and several other devices. A non-invasive method of EEG is used for collecting and monitoring the signals of the brain. Implementing EEG-based BCI technology in home automation systems may facilitate a wide range of tasks for people with disabilities. It is important to assist and empower individuals with paralysis to engage with existing home automation systems and gadgets in this particular situation. This paper proposes a home security system to control a door and a light using an EEG-based BCI. The system prototype consists of the EMOTIV Insight™ headset, Raspberry Pi 4, a servo motor to open/close the door, and an LED. The system can be very helpful for disabled people, including arm amputees who cannot close or open doors or use a remote control to turn on or turn off lights. The system includes an application made in Flutter to receive notifications on a smartphone related to the status of the door and the LEDs. The disabled person can control the door as well as the LED using his/her brain signals detected by the EMOTIV Insight™ headset. Full article
(This article belongs to the Special Issue Bio-Inspired Mechanical Design and Control)
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<p>Real-time home automation system and video simulation: 1. EMOTIV Insight neural headset. 2. Cortex API and FastAPI server are running. 3. The simulated system (Unity Engine). 4. Raspberry Pi Zero 2 W. 5. BreadBoard with 5V LEDs. 6. PLA Door and frame, equipped with Digital MG996 servo motor.</p>
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<p>Software activity diagram.</p>
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<p>Door model 10%—layer 42: (<b>a</b>) software; (<b>b</b>) 3D printer.</p>
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<p>Door model 60%—layer 225: (<b>a</b>) software; (<b>b</b>) 3D printer.</p>
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<p>Door model 100%—layer 425: (<b>a</b>) software; (<b>b</b>) 3D printer.</p>
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<p>Frame model—first component 10%—layer 5: (<b>a</b>) software; (<b>b</b>) 3D printer.</p>
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<p>Frame model—first component 60%—layer 30: (<b>a</b>) software; (<b>b</b>) 3D printer.</p>
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<p>Frame model—first component 100%—layer 50: (<b>a</b>) software; (<b>b</b>) 3D printer.</p>
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<p>Frame model—first component 10%—layer 12: (<b>a</b>) software; (<b>b</b>) 3D printer.</p>
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<p>Frame model—first component 60%—layer 72: (<b>a</b>) software; (<b>b</b>) 3D printer.</p>
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<p>Frame model—first component 100%—layer 120: (<b>a</b>) software; (<b>b</b>) 3D printer.</p>
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<p>Emotiv™ Insight neuro-headset: (<b>a</b>) Semi-dry polymer sensors of the headset; (<b>b</b>) the headset on a user head.</p>
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<p>Locations of sensors in Emotiv Insight headset [<a href="#B21-biomimetics-09-00594" class="html-bibr">21</a>].</p>
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<p>Headset working mechanism.</p>
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<p>Real-time simulation in Unity using Emotiv Insight: (<b>a</b>) simulation of the home view; (<b>b</b>) the use of the neuro-headset to control the video simulation.</p>
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<p>EMOTIV Insight sensors quality: (<b>a</b>) bad quality; (<b>b</b>) good quality.</p>
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<p>Training session.</p>
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<p>Circuit diagram made with Fritzing [<a href="#B33-biomimetics-09-00594" class="html-bibr">33</a>].</p>
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<p>Lock and unlock the door using brain signals, with real-time notifications on video simulation and phone: (<b>a</b>). Door unlocked; (<b>b</b>). door locked.</p>
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<p>Changing LED ON/OFF using brain signals, with real-time notifications on video simulation and the phone: (<b>a</b>). LED ON; (<b>b</b>). LED OFF.</p>
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<p>Home automation system simulated with Unity engine.</p>
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12 pages, 672 KiB  
Article
Clinical and Sociodemographic Factors Related to Amyotrophic Lateral Sclerosis in Spain: A Pilot Study
by Belén Proaño, María Cuerda-Ballester, Noelia Daroqui-Pajares, Noemí del Moral-López, Fiorella Seguí-Sala, Laura Martí-Serer, Carlen Khrisley Calisaya Zambrana, María Benlloch and Jose Enrique de la Rubia Ortí
J. Clin. Med. 2024, 13(19), 5800; https://doi.org/10.3390/jcm13195800 - 28 Sep 2024
Viewed by 545
Abstract
Background: Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease of unknow etiology. Male sex is a well stablished risk factor, but other factors such as early and adult life expositions show contradictory evidence. Aim: to explore the link of clinical, sociodemographic, and occupational [...] Read more.
Background: Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease of unknow etiology. Male sex is a well stablished risk factor, but other factors such as early and adult life expositions show contradictory evidence. Aim: to explore the link of clinical, sociodemographic, and occupational factors with ALS patients in Spain and the impact of these factors in functionality. Methods: A cross-sectional study was conducted with ALS patients and healthy controls. Registered variables were smoking, arterial hypertension, diabetes mellitus type 2, previous cancer to reproductive organs or breast, occupational exposure, and early life exposures. Functionality in ALS patients was compared according to each exposure. Results: The ALS group consisted of 59 participants and the control group of 90 participants. ALS patients showed a significant association with previous cancer (p = 0.011), occupational exposure (p < 0.001), and older siblings (p = 0.029). ALS patients presented significant differences in BMI according to hypertension and older-sibling factors. Moreover, respiratory function was affected in patients with previous cancer (p = 0.031). Conclusions: Occupational exposure and previous cancer to reproductive organs or breast could be linked to ALS patients. In addition, hypertension and previous cancer could affect their BMI and respiratory function. Other factors such as longer smoking periods and exposition to older siblings could also characterize ALS patients. Full article
(This article belongs to the Section Clinical Neurology)
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<p>Functional variation in ALS patients in relation to demographic and clinical factors. (<b>A</b>). Body mass index (BMI) differences according to hypertension (HT) and last son (LS) conditions. (<b>B</b>). ALSFRS-R respiratory and total scores according to previous cancer condition. (<b>C</b>). Respiratory capacity according to previous cancer condition. FVC: forced vital capacity, FEV1: forced expiratory volume in 1 s. * <span class="html-italic">p</span> &lt; 0.05. Mean and SD bars are presented.</p>
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<p>Statistically significant models showing the effect of older siblings in BMI, as well as the effect of previous cancer on respiratory function: FVC and FEV1. Codification of each factor is presented in x axis as zero and one for the absence and presence of the condition, respectively.</p>
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12 pages, 252 KiB  
Review
Sleep Apnea and Amyotrophic Lateral Sclerosis: Cause, Correlation, Any Relation?
by P. Hande Ozdinler
Brain Sci. 2024, 14(10), 978; https://doi.org/10.3390/brainsci14100978 - 27 Sep 2024
Viewed by 1017
Abstract
Amyotrophic lateral sclerosis (ALS) is a motor neuron disease with progressive neurodegeneration, affecting both the cortical and the spinal component of the motor neuron circuitry in patients. The cellular and molecular basis of selective neuronal vulnerability is beginning to emerge. Yet, there are [...] Read more.
Amyotrophic lateral sclerosis (ALS) is a motor neuron disease with progressive neurodegeneration, affecting both the cortical and the spinal component of the motor neuron circuitry in patients. The cellular and molecular basis of selective neuronal vulnerability is beginning to emerge. Yet, there are no effective cures for ALS, which affects more than 200,000 people worldwide each year. Recent studies highlight the importance of the glymphatic system and its proper function for the clearance of the cerebral spinal fluid, which is achieved mostly during the sleep period. Therefore, a potential link between problems with sleep and neurodegenerative diseases has been postulated. This paper discusses the present understanding of this potential correlation. Full article
13 pages, 6675 KiB  
Article
Rutin Ameliorates ALS Pathology by Reducing SOD1 Aggregation and Neuroinflammation in an SOD1-G93A Mouse Model
by Xiaoyu Du, Quanxiu Dong, Jie Zhu, Lingjie Li, Xiaolin Yu and Ruitian Liu
Int. J. Mol. Sci. 2024, 25(19), 10392; https://doi.org/10.3390/ijms251910392 - 27 Sep 2024
Viewed by 366
Abstract
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder characterized by the progressive loss of motor neurons, with limited effective treatments. Recently, the exploration of natural products has unveiled their potential in exerting neuroprotective effects, offering a promising avenue for ALS therapy. In this [...] Read more.
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disorder characterized by the progressive loss of motor neurons, with limited effective treatments. Recently, the exploration of natural products has unveiled their potential in exerting neuroprotective effects, offering a promising avenue for ALS therapy. In this study, the therapeutic effects of rutin, a natural flavonoid glycoside with neuroprotective properties, were evaluated in a superoxide dismutase 1 (SOD1)-G93A mouse model of ALS. We showed that rutin reduced the level of SOD1 aggregation and diminished glial cell activation in spinal cords and brainstems, resulting in significantly improved motor function and motor neuron restoration in SOD1-G93A mice. Our findings indicated that rutin’s multi-targeted approach to SOD1-related pathology makes it a promising candidate for the treatment of ALS. Full article
(This article belongs to the Special Issue Potential Prevention and Treatment of Neurodegenerative Disorders)
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<p>Rutin reduced superoxide dismutase 1 (SOD1)-induced cytotoxicity and neuroinflammation. (<b>a</b>) The structural formula of rutin. (<b>b</b>) The aggregation kinetics of G93A SOD1. The aggregation state of 50 μM of SOD1 was assessed by a Thioflavin T (ThT) fluorescence assay with or without the incubation of 200 or 400 μM of rutin. (<b>c</b>) A Western blot analysis of SOD1 in NSC-34 cells. The cells were transfected with an empty vector (NC-Veh) or a plasmid expressing G93A SOD1 and treated with 8 μM of rutin (SOD1 Rutin) or the vehicle (SOD1 Veh). The SOD1 levels in the cells were analyzed using a Western blot 72 h after transfection. (<b>d</b>) Quantification of SOD1 levels in (<b>b</b>); <span class="html-italic">n</span> = 3 independent experiments. (<b>e</b>) The viability of the NSC-34 cells, determined by an MTT assay. The cells were challenged with 1 μM of SOD1 oligomer or PBS, then the cells were treated with 4 μM or 8 μM of rutin or the vehicle; <span class="html-italic">n</span> = 3 independent experiments. (<b>f</b>–<b>h</b>) Inflammatory cytokine levels in primary microglial culture medium. The primary microglia were treated with 1 μM of SOD1 oligomers in the presence (SOD1 Rutin) or absence (SOD1 Veh) of 8 μM of rutin or treated with PBS (NC Veh) for 48 h, then the levels of IL-1β (<b>f</b>), IL-6 (<b>g</b>), and TNF-α (<b>h</b>) in the culture supernatants were measured by an ELISA; <span class="html-italic">n</span> = 3 independent experiments. The data represent the mean ± SEM and were analyzed by a one-way ANOVA followed by a Tukey’s test (<b>d</b>–<b>h</b>). **, <span class="html-italic">p</span> &lt; 0.01; ***, <span class="html-italic">p</span> &lt; 0.001; and ****, <span class="html-italic">p</span> &lt; 0.0001.</p>
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<p>Rutin rescued motor dysfunction in SOD1-G93A mice. (<b>a</b>) Schematic diagram of pharmacological treatments and experimental measurements in SOD1-G93A mice. (<b>b</b>) The body weights of SOD1-G93A mice treated with (Tg-Rutin) or without rutin (Tg-Veh) and their WT littermates treated with the vehicle (WT-Veh) monitored weekly from 1 to 4 weeks after the treatment; <span class="html-italic">n</span> = 8 independent animals. (<b>c</b>) The latency to fall of mice during the wire hang test; <span class="html-italic">n</span> = 8 independent animals. (<b>d</b>) The latency to fall of mice during the rotarod test; <span class="html-italic">n</span> = 8 independent animals. The data represent the mean ± SEM and were analyzed by a one-way ANOVA followed by a Tukey’s test (<b>c</b>) or a two-way ANOVA followed by a Tukey’s test (<b>b</b>,<b>d</b>). *, <span class="html-italic">p</span> &lt; 0.05; and ****, <span class="html-italic">p</span> &lt; 0.0001.</p>
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<p>Rutin attenuated SOD1 pathology in SOD1-G93A mice. (<b>a</b>) SOD1 immunostaining in the spinal cord of SOD1-G93A mice treated with rutin (Tg-Rutin) or the vehicle (Tg-Veh) and their WT littermates treated with the vehicle (WT-Veh) (scale bar: 60 μm). (<b>b</b>) Quantification of SOD1 immunostaining in the spinal cord; <span class="html-italic">n</span> = 5 independent animals. (<b>c</b>) SOD1 immunostaining in the brainstem of SOD1-G93A mice and their WT littermates treated with rutin or the vehicle (scale bar: 60 μm). (<b>d</b>) Quantification of SOD1 immunostaining in the brainstem; <span class="html-italic">n</span> = 5 independent animals. (<b>e</b>) Dot blot analysis of OC-positive fibrillar SOD1 and A11-positive oligomeric SOD1 in the spinal cord of SOD1-G93A mice and their WT littermates treated with rutin or the vehicle. (<b>f</b>) Quantification of OC-positive and A11-positive SOD1 in the spinal cord; <span class="html-italic">n</span> = 5 independent animals. (<b>g</b>) Dot blot analysis of OC-positive fibrillar SOD1 and A11-positive oligomeric SOD1 in the brainstem of SOD1-G93A mice and their WT littermates treated with rutin or the vehicle. (<b>h</b>) Quantification of OC-positive and A11-positive SOD1 in the brainstem; <span class="html-italic">n</span> = 5 independent animals. The data represent the mean ± SEM and were analyzed by a one-way ANOVA followed by a Tukey’s test (<b>b</b>,<b>d</b>,<b>f</b>,<b>h</b>). ***, <span class="html-italic">p</span> &lt; 0.001; ****, <span class="html-italic">p</span> &lt; 0.0001; and ns, not significant.</p>
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<p>Rutin ameliorated the loss of motor neurons in SOD1-G93A mice. (<b>a</b>) Choline acetyltransferase (ChAT) immunostaining in the spinal cord of SOD1-G93A mice treated with rutin (Tg-Rutin) or the vehicle (Tg-Veh) and their WT littermates treated with the vehicle (WT-Veh) (scale bar: 60 μm). (<b>b</b>) Quantification of ChAT immunostaining in the spinal cord; <span class="html-italic">n</span> = 5 independent animals. (<b>c</b>) ChAT immunostaining in the brainstem of SOD1-G93A mice and their WT littermates treated with rutin or the vehicle (scale bar: 60 μm). (<b>d</b>) Quantification of ChAT immunostaining in the brainstem; <span class="html-italic">n</span> = 5 independent animals. (<b>e</b>) TUNEL analysis performed in the spinal cord of SOD1-G93A mice and their WT littermates (scale bar: 40 μm). (<b>f</b>) Quantification of TUNEL fluorescence intensity in the spinal cord; <span class="html-italic">n</span> = 5 independent animals. The data represent the mean ± SEM and were analyzed by a one-way ANOVA followed by a Tukey’s test (<b>b</b>,<b>d</b>,<b>f</b>). **, <span class="html-italic">p</span> &lt; 0.01; ***, <span class="html-italic">p</span> &lt; 0.001; ****, <span class="html-italic">p</span> &lt; 0.0001.</p>
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<p>Rutin reduced neuroinflammation in SOD1-G93A mice. (<b>a</b>) Western blot analysis of Iba1 and GFAP in the spinal cord of SOD1-G93A mice treated with rutin (Tg-Rutin) or the vehicle (Tg-Veh) and their WT littermates treated with the vehicle (WT-Veh). β-actin was used as the control. (<b>b</b>) Quantification of Iba1 and GFAP levels in the spinal cord; <span class="html-italic">n</span> = 5 independent animals. (<b>c</b>) Western blot analysis of Iba1 and GFAP in the brainstem of SOD1-G93A mice and their WT littermates treated with rutin or the vehicle. β-actin was used as the control. (<b>d</b>) Quantification of Iba1 and GFAP levels in the brainstem; <span class="html-italic">n</span> = 5 independent animals. (<b>e</b>) Iba1 and GFAP immunostaining in the spinal cord of SOD1-G93A mice and their WT littermates treated with rutin or the vehicle (scale bar: 60 μm). (<b>f</b>) Quantification of Iba1 and GFAP intensities in the spinal cord; <span class="html-italic">n</span> = 5 independent animals. (<b>g</b>) Iba1 and GFAP immunostaining in the brainstem of SOD1-G93A mice and their WT littermates treated with rutin or the vehicle (scale bar: 60 μm). (<b>h</b>) Quantification of Iba1 and GFAP intensities in the brainstem; <span class="html-italic">n</span> = 5 independent animals. (<b>i</b>–<b>k</b>) Inflammatory cytokine levels in the spinal cord of the mice. The levels of IL-1β (<b>i</b>), IL-6 (<b>j</b>), and TNF-α (<b>k</b>) in the spinal cord of SOD1-G93A mice and their WT littermates treated with rutin or the vehicle were measured by an ELISA; <span class="html-italic">n</span> = 5 independent animals. The data represent the mean ± SEM and were analyzed by a one-way ANOVA followed by a Tukey’s test (<b>b</b>,<b>d</b>,<b>f</b>,<b>h</b>–<b>k</b>). *, <span class="html-italic">p</span> &lt; 0.05; **, <span class="html-italic">p</span> &lt; 0.01; ***, <span class="html-italic">p</span> &lt; 0.001; ****, <span class="html-italic">p</span> &lt; 0.0001; and ns, not significant.</p>
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16 pages, 959 KiB  
Systematic Review
Advancements in Pharmacological Interventions and Novel Therapeutic Approaches for Amyotrophic Lateral Sclerosis
by María Montiel-Troya, Himan Mohamed-Mohamed, Teresa Pardo-Moreno, Ana González-Díaz, Azahara Ruger-Navarrete, Mario de la Mata Fernández, María Isabel Tovar-Gálvez, Juan José Ramos-Rodríguez and Victoria García-Morales
Biomedicines 2024, 12(10), 2200; https://doi.org/10.3390/biomedicines12102200 - 27 Sep 2024
Viewed by 473
Abstract
(1) Amyotrophic Lateral Sclerosis (ALS) is a neurodegenerative disease in which the patient suffers from an affection of both upper and lower motor neurons at the spinal and brainstem level, causing a progressive paralysis that leads to the patient’s demise. Gender is also [...] Read more.
(1) Amyotrophic Lateral Sclerosis (ALS) is a neurodegenerative disease in which the patient suffers from an affection of both upper and lower motor neurons at the spinal and brainstem level, causing a progressive paralysis that leads to the patient’s demise. Gender is also considered a predisposing risk factor for developing the disease. A brief review of the pathophysiological mechanisms of the disease is also described in this work. Despite the fact that a cure for ALS is currently unknown, there exists a variety of pharmacological and non-pharmacological therapies that can help reduce the progression of the disease over a certain period of time and alleviate symptoms. (2) We aim to analyze these pharmacological and non-pharmacological therapies through a systematic review. A comprehensive, multidisciplinary approach to treatment is necessary. (3) Drugs such as riluzole, edaravone, and sodium phenylbutyrate, among others, have been investigated. Additionally, it is important to stay updated on research on new drugs, such as masitinib, from which very good results have been obtained. (4) Therapies aimed at psychological support, speech and language, and physical therapy for the patient are also available, which increase the quality of life of the patients. Full article
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<p>Schematic representation of the pathophysiological mechanisms underlying ALS.</p>
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<p>PRISMA flowchart.</p>
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<p>Treatments for ALS.</p>
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67 pages, 12154 KiB  
Review
The Microbiota–Gut–Brain Axis and Neurological Disorders: A Comprehensive Review
by Mohammed M. Nakhal, Lidya K. Yassin, Rana Alyaqoubi, Sara Saeed, Alreem Alderei, Alya Alhammadi, Mirah Alshehhi, Afra Almehairbi, Shaikha Al Houqani, Shamsa BaniYas, Haia Qanadilo, Bassam R. Ali, Safa Shehab, Yauhen Statsenko, Sarah Meribout, Bassem Sadek, Amal Akour and Mohammad I. K. Hamad
Life 2024, 14(10), 1234; https://doi.org/10.3390/life14101234 - 26 Sep 2024
Viewed by 2528
Abstract
Microbes have inhabited the earth for hundreds of millions of years longer than humans. The microbiota–gut–brain axis (MGBA) represents a bidirectional communication pathway. These communications occur between the central nervous system (CNS), the enteric nervous system (ENS), and the emotional and cognitive centres [...] Read more.
Microbes have inhabited the earth for hundreds of millions of years longer than humans. The microbiota–gut–brain axis (MGBA) represents a bidirectional communication pathway. These communications occur between the central nervous system (CNS), the enteric nervous system (ENS), and the emotional and cognitive centres of the brain. The field of research on the gut–brain axis has grown significantly during the past two decades. Signalling occurs between the gut microbiota and the brain through the neural, endocrine, immune, and humoral pathways. A substantial body of evidence indicates that the MGBA plays a pivotal role in various neurological diseases. These include Alzheimer’s disease (AD), autism spectrum disorder (ASD), Rett syndrome, attention deficit hyperactivity disorder (ADHD), non-Alzheimer’s neurodegeneration and dementias, fronto-temporal lobe dementia (FTLD), Wilson–Konovalov disease (WD), multisystem atrophy (MSA), Huntington’s chorea (HC), Parkinson’s disease (PD), multiple sclerosis (MS), amyotrophic lateral sclerosis (ALS), temporal lobe epilepsy (TLE), depression, and schizophrenia (SCZ). Furthermore, the bidirectional correlation between therapeutics and the gut–brain axis will be discussed. Conversely, the mood of delivery, exercise, psychotropic agents, stress, and neurologic drugs can influence the MGBA. By understanding the MGBA, it may be possible to facilitate research into microbial-based interventions and therapeutic strategies for neurological diseases. Full article
(This article belongs to the Special Issue Microbiota in Health and Disease)
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<p>Brain disorder classifications. Neurological disorders are divided in this review into developmental disabilities and metabolic disorders, neurodegenerative disorders (NDDs), immune-mediated nervous system diseases, non-communicable neurological disorders, and mental (behavioural) disorders.</p>
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<p>Altered gut microbiota in Rett syndrome. Increased levels of harmful bacteria such as <span class="html-italic">Clostridium</span> and a reduction in beneficial bacteria like <span class="html-italic">Bifidobacterium</span> and <span class="html-italic">Lactobacillus</span> reflect an imbalance in the gut microbial community in patients with Rett syndrome (RTT), indicating an association with gastrointestinal (GI) symptoms such as constipation, bloating, and abdominal pain. Immune modulation, metabolic changes, and the production of neuroactive compounds are mechanisms that may influence the gut–brain axis in RTT patients.</p>
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<p>The link between gut microbiota and their metabolites with lipid dysregulation in Alzheimer disease (AD). The involvement of short-chain fatty acids (SCFAs), phospholipids, and other metabolites generated by gut bacteria in the synthesis and degradation of structural and functional lipids in cells might play a role in the progression and deterioration of AD pathology.</p>
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<p>Therapeutic and non-pharmacological interventions employed to enhance cognitive functions in Alzheimer disease (AD). Microbiome-based therapies for AD include probiotics, prebiotics, synbiotics, postbiotics, and faecal material transplantation (FMT). The pathogenic proteins amyloid beta and tau contribute to hypothalamic–pituitary–adrenal (HPA) axis dysregulation, which results in synaptotoxicity and amyloidosis. These interventions aim to modulate the gut microbiota, improve AD symptoms, and modulate plaque-associated microglial functions. However, the beneficial and side effects of these approaches on the central nervous system (CNS), the endocrine system, and the immune system have yet to be fully studied.</p>
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<p>Symptomatology and pathological hallmarks of Parkinson disease (PD). (<b>1</b>) Clinical features and symptoms of PD; (<b>2</b>) biomarkers and neuroimaging evidence that identifies alpha-synuclein deposits.</p>
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<p>Pathogenesis of synaptic dysfunction in multiple sclerosis (MS). Healthy neurons in MS display normal morphology and function, with intact myelin sheaths that facilitate rapid and efficient signal transmission. In contrast, damaged neurons often exhibit demyelination, where the protective myelin coating is disrupted or lost, leading to impaired signal conduction.</p>
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<p>Altered serotonin transporter levels in patients with MS. Tryptophan (TRP) is converted into serotonin (5-HT) through a series of chemical reactions, with the enzyme tryptophan hydroxylase (TPH) playing a key role. Some of the most studied sites of 5-HT action include the gastrointestinal (GI) system, cerebral cortex, and hypothalamus. Activation of the 5-HT1A receptor in clusters of differentiation 4 (CD4+) cells increases interleukin-10 (IL-10) production [<a href="#B164-life-14-01234" class="html-bibr">164</a>]. Conversely, activation of the 5-HT3 receptor stimulates T cells to produce inflammatory mediators like interleukin-6 (IL-6) and interleukin-7 (IL-17). This demonstrates how serotonin synthesis and its varied roles are intricately connected to the gut microbiota, especially in the context of sickness behaviour.</p>
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<p>Microorganisms’ alteration in multiple sclerosis (MS). This diagram highlights specific changes in the microbiome associated with the disease and their impacts on the immune system, both beneficial and detrimental.</p>
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<p>The central nervous system (CNS) and peripheral nervous system (PNS) bidirectionally communicate with the gut microbiota. (<b>A</b>) The peripheral nervous system includes the cranial and spinal nerves, in particular, the ganglia nerves that extend beyond the CNS, and the autonomic nervous system, which consists of the sympathetic and parasympathetic branches as demonstrated in. The CNS plasticity includes many cellular and anatomical mechanisms, reflecting synaptic efficacy and synaptic redundancy. The creation of new neurons in the CNS is known as neurogenesis, while synaptogenesis involves the formation of synapses that facilitate neuronal communication. The autonomic nervous system which communicates with internal organs and glands has a flexibility that reflects the integrity of central and peripheral systems, incorporating the adaptation support to environmental demands and thereby serving as a key indicator of neuroplasticity. The digestive tract possesses its distinct nervous system called the ENS. Neurons found in certain nerve clusters transmit sensory information from the body’s outer regions to the CNS. (<b>B</b>) The ENS comprises plexuses that consist of neurons. Individual enteric neurons function either as intrinsic afferent, efferent, motor neurons, or interneurons. The myenteric plexus resides between the longitudinal and circular muscle layers. The small intestine alone houses approximately 100 million neurons, making the ENS the largest collection of neurons and glia outside the brain.</p>
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<p>Correlation between the brain and gut microbiome in major depressive disorder (MDD). Stressful circumstances can disrupt the delicate balance of the gut microbiota, resulting elevated levels of proinflammatory cytokines, particularly interleukin-6 (IL-6) and interferon gamma (IFN-γ), and reduced levels of short-chain fatty acids (SCFAs), and weaken the integrity of the gut, facilitating the migration of bacteria (leaky gut). An imbalance in the kynurenine pathway results from increased levels of inflammatory cytokines stimulate the action of indoleamine 2, 3-dioxygenase (IDO), which interferes with the synthesis of protective metabolites such as kynurenic acid (KYNA). As a result, compromising the blood–brain barrier (BBB) increases inflammation in brain tissue and causes astrocyte atrophy and microglial activation. Probiotics and prebiotics have been shown to modify the gut microbiota and improve intestinal barrier function, which in turn indirectly reduces BBB permeability, toxic metabolites from the kynurenine pathway, and inflammatory cytokines. LBS: gut-derived lipopolysaccharides.</p>
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<p>Dopamine agonists and adjunctive pharmacotherapies for Parkinson’s disease (PD). This illustration elucidates how dopamine agonists are potentially adjunctive treatments later in the disease course, along with other approved pharmacologic options for alleviating motor symptoms associated with the disease through the microbiome, contributing to a comprehensive management strategy for the disease. Abbreviations: Levodopa (L-Dopa), catechol-O-methyl-transferase (COMT), Monoamine oxidase-B (MAO-B). Green arrows indicate an increase and red arrows indicate a decrease [<a href="#B254-life-14-01234" class="html-bibr">254</a>,<a href="#B256-life-14-01234" class="html-bibr">256</a>,<a href="#B259-life-14-01234" class="html-bibr">259</a>].</p>
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<p>Psychotropic drugs, microbiome composition and mental disorders. Psychotropic drugs work by influencing the levels and activity of neurotransmitters, the chemicals in the brain that transmit signals between nerve cells. The goal of these medications is to correct imbalances in neurotransmitter levels, thereby alleviating symptoms and improving the quality of life for individuals with mental health conditions. This figure explains how psychotropic agents are connected to the gut microbiome, altering its bioavailability. Abbreviations: selective serotonin reuptake inhibitors (SSRIs), gamma-aminobutyric acid (GABA) [<a href="#B228-life-14-01234" class="html-bibr">228</a>].</p>
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<p>The impact of delivery mode on infant gut microbiota. The mode of delivery significantly alters neonatal gut microbiota. C-sections can affect intestinal epithelial cell activation and immune system development. Conversely, vaginal birth exposes infants to beneficial maternal microbiota, promoting a balanced immune system, gut function, and short-chain fatty acids (SCFAs).</p>
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<p>The effect of exercise on the microbiome. (<b>A</b>) Individuals who engage in at least three hours of exercise per week exhibited elevated levels of butyrate producing bacteria, including <span class="html-italic">Akkermansia muciniphila</span>, <span class="html-italic">Faecalibacterium prausnitzii</span>, and <span class="html-italic">Roseburia hominis</span>. (<b>B</b>) The comparison between moderate and high intensity exercise. The abundance of Bifidobacterium and butyrate-producing bacteria, including <span class="html-italic">Lachnospira eligens</span> and <span class="html-italic">Enterococcus</span> spp., was greater in individuals who participated in lower intensity exercises. Additionally, obese and overweight males who practiced high intensity exercise presented with reduction in faecal and serum levels of branched-chain amino acids and aromatic amino acids. They also had increased faecal propionate, gamma-aminobutyric acid (GABA), and short-chain fatty acids (SCFAs). Abbreviation: branched-chain amino acids (BCAAs).</p>
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11 pages, 869 KiB  
Article
SHED-CM: The Safety and Efficacy of Conditioned Media from Human Exfoliated Deciduous Teeth Stem Cells in Amyotrophic Lateral Sclerosis Treatment: A Retrospective Cohort Analysis
by Yasuhiro Seta, Konomi Kimura, Goto Masahiro, Kimiko Tatsumori and Yasufumi Murakami
Biomedicines 2024, 12(10), 2193; https://doi.org/10.3390/biomedicines12102193 - 26 Sep 2024
Viewed by 474
Abstract
Background/Objectives: Amyotrophic lateral sclerosis (ALS) is a progressive and irreversible neurodegenerative disease with limited treatment options. Advances in regenerative medicine have opened up new treatment options. The primary and exploratory objectives of this retrospective cohort study were to evaluate the safety and efficacy [...] Read more.
Background/Objectives: Amyotrophic lateral sclerosis (ALS) is a progressive and irreversible neurodegenerative disease with limited treatment options. Advances in regenerative medicine have opened up new treatment options. The primary and exploratory objectives of this retrospective cohort study were to evaluate the safety and efficacy of stem cells from human exfoliated deciduous teeth-conditioned media (SHED-CM). Methods: Safety assessments included adverse events, vital signs, and laboratory test changes before and after administration, and efficacy was measured using the ALS Functional Rating Scale-Revised (ALSFRS-R), grip strength, and forced vital capacity in 24 patients with ALS treated at a single facility between 1 January 2022, and 30 November 2023. Results: While ALSFRS-R scores typically decline over time, the progression rate in this cohort was slower, suggesting a potential delay in disease progression. Alternatively, improvements in muscle strength and mobility were observed in some patients. Although adverse events were reported in only 3% of cases (no serious allergic reactions), the treatment-induced changes in vital signs and laboratory results were not clinically significant. Conclusions: The SHED-CM treatment is a safe and potentially effective therapeutic option for patients with ALS. Further research is needed to optimize the SHED-CM treatment; however, this study lays the groundwork for future exploration of regenerative therapies for ALS. Full article
(This article belongs to the Special Issue Neurodegenerative Diseases: From Mechanisms to Therapeutic Approaches)
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<p>The initial ALSFRS-R score for each case and the changes in score after the 4th, 8th, and 12th administrations. The cases show increases or maintenance in scores. The colors are used to distinguish individual cases and do not represent differences in variables.</p>
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<p>* The horizontal axis represents the number of administrations. The date in parentheses is from the first administration date.</p>
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21 pages, 607 KiB  
Review
Understanding Amyotrophic Lateral Sclerosis: Pathophysiology, Diagnosis, and Therapeutic Advances
by Radu Eugen Rizea, Antonio-Daniel Corlatescu, Horia Petre Costin, Adrian Dumitru and Alexandru Vlad Ciurea
Int. J. Mol. Sci. 2024, 25(18), 9966; https://doi.org/10.3390/ijms25189966 - 15 Sep 2024
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Abstract
This review offers an in-depth examination of amyotrophic lateral sclerosis (ALS), addressing its epidemiology, pathophysiology, clinical presentation, diagnostic techniques, and current as well as emerging treatments. The purpose is to condense key findings and illustrate the complexity of ALS, which is shaped by [...] Read more.
This review offers an in-depth examination of amyotrophic lateral sclerosis (ALS), addressing its epidemiology, pathophysiology, clinical presentation, diagnostic techniques, and current as well as emerging treatments. The purpose is to condense key findings and illustrate the complexity of ALS, which is shaped by both genetic and environmental influences. We reviewed the literature to discuss recent advancements in understanding molecular mechanisms such as protein misfolding, mitochondrial dysfunction, oxidative stress, and axonal transport defects, which are critical for identifying potential therapeutic targets. Significant progress has been made in refining diagnostic criteria and identifying biomarkers, leading to earlier and more precise diagnoses. Although current drug treatments provide some benefits, there is a clear need for more effective therapies. Emerging treatments, such as gene therapy and stem cell therapy, show potential in modifying disease progression and improving the quality of life for ALS patients. The review emphasizes the importance of continued research to address challenges such as disease variability and the limited effectiveness of existing treatments. Future research should concentrate on further exploring the molecular foundations of ALS and developing new therapeutic approaches. The implications for clinical practice include ensuring the accessibility of new treatments and that healthcare systems are equipped to support ongoing research and patient care. Full article
(This article belongs to the Section Molecular Neurobiology)
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<p>Role of Chitinase as a Biomarker in ALS Pathophysiology. This image illustrates how activated microglia and astrocytes in ALS contribute to chitinase expression, which serves as a biomarker for disease progression and therapeutic monitoring.</p>
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