Application of compound Pinnatifolone A in preparation of anti-parkinsonism medicines
Technical Field
The invention belongs to the technical field of medicines, and particularly relates to application of a compound Pinnatifolone A in preparation of an anti-parkinsonism medicament.
Background
Parkinson's Disease (PD) is a chronic, progressive neurodegenerative Disease whose main pathological feature is the loss of dopaminergic neurons in the brain, leading to the appearance of motor and non-motor symptoms. The cause of this disease may involve genetic factors, environmental toxin exposure, and aging of the nervous system. Motor symptoms of parkinson's disease include resting tremor, myotonia, bradykinesia and dysequilibrium, whereas non-motor symptoms include depression, anxiety, dementia, hyposmia or disappearance of smell, salivation, dysphagia, constipation, frequent urination, urgent urination, insomnia, excessive daytime sleepiness, fatigue, etc.
Modern medical methods for treating parkinson's disease mainly comprise medication, surgical treatment, exercise therapy, psychological intervention, care and the like. Among them, drug therapy is the first choice and the main therapeutic means. The therapeutic drugs include compound levodopa, dopamine receptor agonists (DAs), monoamine oxidase B-type inhibitors (MAO-BI), catechol-O-methyltransferase inhibitors (COMTI), anticholinergic agents, etc. However, the existing treatment methods have limitations such as side effects of medicines, complications caused by long-term use, and the like. For example, prolonged use of levodopa may lead to motor complications, such as catabolism, while neuropsychiatric side effects, such as hallucinations and consciousness disturbance, may also occur. In addition, some drugs may cause other side effects such as orthostatic hypotension, edema, and the like. Therefore, the medicine for treating the parkinsonism has no toxic or side effect, is convenient to take, is economical and practical, and has become a hot spot for the development of modern medicines.
Compound Pinnatifolone A (C 15H20O3, molecular weight 248.141) is an eremophilane type sesquiterpene compound with wide pharmacological activity extracted from plants of Syringa of Oleaceae, and belongs to natural sesquiterpene compounds. As the sesquiterpenoids have novel structures, modern researches have found that the sesquiterpenoids have wide biological activities, including anti-tumor, antibacterial, anti-inflammatory, anti-neurotoxic, antiviral, immunosuppressive, liver protecting and heart strengthening effects. Recent studies have shown that Pinnatifolone A has potential as a sedative hypnotic. At present, the traditional Chinese medicine is a precious resource for identifying and developing new medicines, pinnatifolone A is taken as an active ingredient of the traditional Chinese medicine, and has the potential of further development. In addition, the preparation method of the compound Pinnatifolone A in the prior art is complex, and brings inconvenience to practical application.
Disclosure of Invention
The invention aims to explore the activity of the traditional Chinese medicine of a compound Pinnatifolone A and provide the application of the compound Pinnatifolone A in preparing anti-parkinsonism medicines. The inventor finds that the compound has stronger activity in the aspect of anti-parkinsonism, definite curative effect and small toxic and side effect, and can be used as a potential anti-parkinsonism medicament.
The technical scheme of the invention is as follows:
the application of the compound Pinnatifolone A in preparing anti-parkinsonism medicines.
Preferably, the chemical structural formula of the compound Pinnatifolone A is:
。
Preferably, the stereo configuration of the compound Pinnatifolone A is any one of the following:
。
more preferably, the compound Pinnatifolone A has the steric configuration of 。
Preferably, the content of compound Pinnatifolone A in the medicament is 1-99.5%, more preferably 2-50%.
Preferably, the medicament further comprises a pharmaceutically acceptable carrier or adjuvant.
The compound can be directly or indirectly added into various pharmaceutically acceptable common carriers or auxiliary materials (such as filling agents, disintegrating agents, lubricants, adhesives and the like) required by preparing different dosage forms by a person skilled in the art, and is prepared into common oral preparations or injection preparations by a conventional pharmaceutical preparation method in the pharmaceutical field.
Preferably, the oral preparation is one of a tablet, a capsule, a granule, a fat emulsion, a microcapsule and a pill.
Preferably, the injection preparation is injection or powder injection.
Preferably, the oral formulation is administered at a dose of from 5 to 200mg/kg, more preferably from 10 to 40mg/kg, of compound Pinnatifolone A.
The invention also provides a preparation method of the compound Pinnatifolone A, which comprises the following steps:
(1) Extracting dry stem of Syringa oblata with 10 times of 70% (volume percent) ethanol water solution twice for 2 hr each time, mixing extractive solutions, concentrating until no ethanol smell exists, and extracting with dichloromethane and ethyl acetate to obtain dichloromethane extract and ethyl acetate part;
(2) Mixing dichloromethane extraction part with 100-200 mesh silica gel 1:1, drying, separating by silica gel (200-300 mesh) column chromatography, eluting with petroleum ether-acetone (volume ratio of 100:0, 50:1, 25:1, 10:1, 5:1, 1:1, 0:100) as mobile phase, collecting with 2000ml unit, combining and concentrating by thin layer chromatography detection to obtain 12 fractions 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12;
(3) And (3) taking fraction 3, carrying out recrystallization purification in a mixed solvent of petroleum ether and acetone in a volume ratio of 5:1, and repeatedly carrying out recrystallization purification to obtain the compound Pinnatifolone A.
The beneficial effects of the invention are as follows:
1. According to the invention, through an influence experiment of the compound Pinnatifolone A on the length of the pole climbing time and the length of the rotating rod fatigue movement of the MTPT induced mice, the compound Pinnatifolone A has strong activity on the aspect of anti-parkinsonism, has definite curative effect and small toxic and side effects, and can be used as a potential anti-parkinsonism drug.
2. The preparation method of the compound Pinnatifolone A is simple, the target compound can be obtained through silica gel column chromatography separation and recrystallization purification, and compared with the complicated preparation process in the prior art, the preparation method has the advantages of time and cost saving.
Drawings
FIG. 1 is an X-ray single crystal diffraction pattern of compound Pinnatifolone A.
Detailed Description
The following description of the embodiments of the present invention will be made in detail and with reference to the accompanying drawings, wherein it is apparent that the embodiments described are only some, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Unless otherwise specified, all experimental procedures involved in embodiments of the present invention are conventional, all reagents involved are commercially available, and all reagents are commercially available.
The eremophilane sesquiterpenoids Pinnatifolone A can be extracted and separated from plants of the genus Syringa of the family Oleaceae, or can be prepared by other existing technologies.
Compared with the prior art that the target compound Pinnatifolone A is obtained from the lilac roots by adopting a plurality of separation steps, the method provided by the invention has the advantages that the target compound Pinnatifolone A can be obtained by only one silica gel column chromatography separation and combined recrystallization after the effective components are extracted from the lilac stems, and the method is simpler, and the time and the cost are saved.
1. Preparation of Compound Pinnatifolone A
The compound Pinnatifolone A is prepared by the laboratory, is extracted and separated from plants of lilac Syringa oblata Lindl of lilac of the genus lilac of the family oleaceae, and is prepared by the following specific preparation method:
Dried stem of Syringa oblata (10 kg) is crushed, soaked for 24 hours at room temperature, extracted twice by adding 70% (volume percent) ethanol water solution with the amount of 10 times, each time for 2 hours, the extracting solutions are combined and concentrated until no ethanol smell exists, and extraction is carried out by using dichloromethane (10L) and ethyl acetate (10L) respectively, so as to obtain a dichloromethane extraction part 385 g and an ethyl acetate extraction part 296 g. Mixing dichloromethane extraction part with 100 mesh silica gel 1:1, drying, separating by silica gel (200-300 mesh) column chromatography, taking petroleum ether-acetone (volume ratio of 100:0, 50:1, 25:1, 10:1, 5:1, 1:1, 0:100) as mobile phase, collecting in 2000ml unit, combining and concentrating by thin layer chromatography detection to obtain 12 fractions (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12). The fraction 3 is taken to be recrystallized and purified in a mixed solvent of petroleum ether and acetone with the volume ratio of 5:1, the compound Pinnatifolone A (10.2 g) is obtained after repeated recrystallization and purification, the purity is more than 95 percent by adopting a high-performance liquid phase area normalization method for detection, meanwhile, the structure of the compound is identified by adopting mass spectrum, nuclear magnetic resonance (1H-NMR, 13C-NMR and 2D-NMR), and the compound is Pinnatifolone A, the molecular formula is C 15H20O3, the molecular weight is 248.14 and the planar chemical structural formula is as follows through structural analysis and comparison with the literature:
。
the stereochemistry of compound Pinnatifolone A was also determined by X-single crystal diffraction pattern analysis of fig. 1 to be:
。
2. Compound pharmacodynamic experimental study
1. Experimental animal
C57BL/6J mice, 8-10 week old, male, weight 22+ -2 g, purchased from Hunan Stokes Leyda laboratory animals Co., ltd., license number SCXK (Hunan) 2024-000.
2. Experimental method
Mice were randomly grouped into normal, model, pinnatifolone A low-dose (10 mg/kg), pinnatifolone A medium-dose (20 mg/kg), pinnatifolone A high-dose (40 mg/kg), positive drug (shafenamide gavage, 40 mg/kg) groups, 9 animals each after one week of adaptive feeding. The normal group was given an equal volume of 0.5% CMC-Na (sodium carboxymethylcellulose) solution by intragastric administration in a volume of 0.1ml/10g, continuously or after 0.5% CMC-Na for 9 days, and the remaining groups except the normal group were intraperitoneally injected with MPTP (1-methyl-4-phenyl-1, 2, 3, 6-tetrahydropyridine, 25 mg/kg) simultaneously with molding, and again after 1 hour, continuously for 5 days for 14 days, and subjected to rod-turning and pole-climbing behavioural assay experiments on day 14.
3. Experimental results
1. Effect of Compound Pinnatifolone A on MTPT-induced mice climbing time
The results are shown in Table 1, and normal mice can smoothly climb from the top of the pole to the bottom of the pole in pole climbing experiments. Compared with the normal group, the movement time of the mice in the model group from the top of the rod to the bottom of the rod is obviously prolonged to 80.97+/-52.17 s, and the progress of rod climbing of the mice in the model group is slowed down due to the fact that the mice are static on the rod caused by the reduction of the movement capacity and the tremor of muscles. The length of movement of mice on the rod was significantly reduced after Pinnatifolone A different dose groups compared to the model group.
TABLE 1
2. Effect of Compound Pinnatifolone A on length of time that MTPT induces rod fatigue movement in mice
The experiment of the length of time of fatigue exercise of the rotating rod shows that after MPTP injection, mice show the manifestations of shortness of breath, tremors, tail stiffness, gait instability and limited behavior ability. The results of the rotating rod experiments are shown in Table 2, compared with a control group, the movement time of the mice in the model group on the rotating rod fatigue tester is obviously shortened to 11.18+/-8.37 s, and compared with the model group, the movement time of the mice in the model group on the rotating rod fatigue tester after being dosed in Pinnatifolone A different dose groups is obviously prolonged.
TABLE 2
Taken together, compound Pinnatifolone A has been shown to have significant antiparkinsonian effects. Thus, compound Pinnatifolone A can be used for preparing an anti-parkinsonism medicament.
Finally, it should be noted that the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited to the above-mentioned embodiment, but may be modified or some of the technical features thereof may be replaced by other technical solutions described in the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.