CN113777331A - Application of urokininogen-1 and polypeptide fragment thereof in burn - Google Patents
Application of urokininogen-1 and polypeptide fragment thereof in burn Download PDFInfo
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- CN113777331A CN113777331A CN202010517788.9A CN202010517788A CN113777331A CN 113777331 A CN113777331 A CN 113777331A CN 202010517788 A CN202010517788 A CN 202010517788A CN 113777331 A CN113777331 A CN 113777331A
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- Prior art keywords
- burn
- kininogen
- urine
- antibody
- thr
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- G01N33/6848—Methods of protein analysis involving mass spectrometry
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Abstract
The invention provides application of urine Kininogen-1 (Kininogen-1) and polypeptide fragments thereof, in particular to application of urine Kininogen-1 and polypeptide fragments thereof in preparation of preparations for burn diagnosis, differential diagnosis, burn area and degree evaluation, treatment effect evaluation, monitoring, prognosis evaluation, mechanism research and the like. The burn is an important common wound in daily life, about 5000-100000 people burn in every 100 million people every year, according to the statistics of the world health organization, more than 30 million people die of burn patients all year around the world, and the survival rate of the serious burn treatment is still at a lower level. The research proves that compared with healthy people (normal control group), the urine kininogen-1 and the polypeptide fragment thereof of the burn patient are different and change along with the difference of the burn degree. Can be used for various purposes of detecting burn patients. The invention exerts the advantages of noninvasive acquisition, large-scale repeated sampling and convenient storage of the urine specimen, and utilizes the urine specimen to detect the urine kininogen-1 and the polypeptide fragment thereof.
Description
Technical Field
The invention relates to new application of urine kininogen-1 and polypeptide fragments thereof, in particular to application of urine kininogen-1 and polypeptide fragments thereof in burn diagnosis, differential diagnosis, burn area and degree evaluation, treatment effect evaluation, monitoring, prognosis evaluation, mechanism research and the like.
Background
Burn refers to the injury of skin, tissue and even deep viscera of human body caused by chemical substances such as flame, high-temperature gas, scorching solid or liquid, radioactive rays, electric energy, strong acid and strong alkali, etc., and is a systemic comprehensive disease. After burn, a large amount of reactions such as necrosis, infection, shock, blood coagulation dysfunction and the like of wound tissues can cause a series of pathophysiological changes of organisms. Burns of different degrees have different influences on human bodies, serious burns can damage the environment in the human bodies, the burn patients have pathophysiological changes of complexity of various systems, and relevant detection indexes can correspondingly change along with the difference of the severity of the burns. Timely detection of changes in these indices can provide valuable reference for clinicians in many areas, such as disease diagnosis, disease judgment, treatment selection, and patient prognosis assessment.
However, patients with severe burns have poor skin integrity, and clinical use of hematological tests as invasive tests on the skin in such patients has presented difficulties, and repeated blood draw tests can also exacerbate patient pain. Urine as ultrafiltrate of blood contains abundant biological information, and the collection process has the advantages of non-invasive and convenient operation, and the like, which is particularly obvious in the detection of burn patients. The biomarker which is helpful for burn diagnosis and reflects disease change is searched in urine, so that the life quality and compliance of burn patients can be improved, the pain of blood collection for many times is relieved, and a reference basis which is favorable for disease diagnosis and treatment is better provided for clinicians.
Kininogen-1 (Kininogen-1, KNG-1) is a high molecular weight Kininogen, produced primarily by the liver. Kininogens belong to one of the members of the kininogen-kinin system (KKS). KKS is composed of kininogen, kinins, bradykinin Bl and B2 receptors and kallikreins, etc., widely present in animal blood and tissues, and has the effects of regulating vasodilation and local blood flow, stimulating prostaglandin biosynthesis, inducing inflammatory response and smooth muscle contraction, participating in the release and activation of enzymes, hormones and growth factors, etc. Kininogen-1 in urine of burn patients is expressed and reduced in a healthy group, and has a certain correlation with the burn degree.
Compared with the common clinical blood sample, the urine can be collected in a non-invasive, continuous and large amount; without homeostatic regulation, more various and larger changes can be accumulated, and many pathophysiological changes of the body can be reflected in urine. Some protein polypeptides with relatively small molecular weight, such as hormones and cytokines, are excreted into urine quickly after entering blood, and the probability that the proteins and polypeptides are detected in urine is much higher than that in blood; before urine is collected, a possible protein degradation process in urine is completed, so that urine protein can be kept stable for a longer time. In order to relieve the pain of multiple blood sampling of burn patients, the experiment is expected to realize the diagnosis and disease monitoring of the burn patients by painless, convenient, quick and easily repeated urine detection through the research of urine protein or polypeptide on the basis of the methodology exploration of the early stage, and also lays a foundation for the further research of the urine polypeptide detection kit.
Disclosure of Invention
The invention aims to provide application of urine kininogen-1 and polypeptide fragments thereof in preparation of preparations for burn diagnosis, differential diagnosis, burn area and degree evaluation, treatment effect evaluation, monitoring, prognosis evaluation, mechanism research and the like.
Preferably, the amino acid sequence of the urinary kininogen-1 is shown in SEQ ID NO.1 (MKLITILFLC SRLLLSLTQE SQSEEIDCND KDLFKAVDAA LKKYNSQNQS NNQFVLYRIT EATKTVGSDT FYSFKYEIKE GDCPVQSGKT WQDCEYKDAA KAATGECTAT VGKRSSTKFS VATQTCQITP AEGPVVTAQY DCLGCVHPIS TQSPDLEPIL RHGIQYFNNN TQHSSLFMLN EVKRAQRQVV AGLNFRITYS IVQTNCSKEN FLFLTPDCKS LWNGDTGECT DNAYIDIQLR IASFSQNCDI YPGKDFVQPP TKICVGCPRD IPTNSPELEE TLTHTITKLN AENNATFYFK IDNVKKARVQ VVAGKKYFID FVARETTCSK ESNEELTESC ETKKLGQSLD CNAEVYVVPW EKKIYPTVNC QPLGMISLMK RPPGFSPFRS SRIGEIKEET TVSPPHTSMA PAQDEERDSG KEQGHTRRHD WGHEKQRKHN LGHGHKHERD QGHGHQRGHG LGHGHEQQHG LGHGHKFKLD DDLEHQGGHV LDHGHKHKHG HGHGKHKNKG KKNGKHNGWK TEHLASSSED STTPSAQTQE KTEGPTPIPS LAKPGVTVTF SDFQDSDLIA TMMPPISPAP IQSDDDWIPD IQIDPNGLSF NPISDFPDTT SPKCPGRPWK SVSEINPTTQ MKESYYFDLT DGLS); or an amino acid sequence which is derived from the amino acid sequence shown in SEQ ID NO.1 and has the same function with the amino acid sequence shown in SEQ ID NO. 1.
Preferably, the preparation is a detection kit for kininogen-1 in urine of burn patients and polypeptide fragments thereof.
Preferably, the kit comprises one or more of an immunological method of antigen-antibody reaction and kits thereof, such as an aptamer antibody or antibody fragment capable of specifically binding kininogen-1 and polypeptide fragments thereof.
Preferably, the detection method comprises methods such as mass spectrometry for directly detecting kininogen-1 and polypeptide fragments thereof and related kits thereof.
Preferably, the detection method comprises related nucleic acid detection methods for directly detecting kininogen-1 and polypeptide fragments thereof and related kits.
Preferably, the kit further comprises a component selected from the group consisting of: the kit comprises a solid phase carrier, a diluent, a reference substance, a standard substance, a quality control substance, a detection antibody, a second antibody diluent, a luminescent reagent, a washing solution, a color development solution and a stop solution, wherein the solid phase carrier is any one or a combination of a plurality of the solid phase carrier, the diluent, the reference substance, the standard substance, the quality control substance, the detection antibody, the second antibody and the second antibody diluent.
Preferably, the standard comprises kininogen-1 standard, humanized tag antibody standard; preferably, the quality control product comprises: kininogen-1 quality control products and humanized label antibody quality control products; preferably, the solid support comprises: particles, microspheres, glass slides, test strips, plastic beads, liquid phase chips, micro-porous plates or affinity membranes and other carriers with the same functions.
Preferably, the solid phase carrier is made of any one of polyvinyl chloride, polystyrene, polyacrylamide and cellulose, and has similar functions.
The inventor firstly collects urine samples of healthy people and patients with different burn degrees, centrifugates for 5min at 4000r/min, absorbs supernatant, determines the concentration of extracted protein by a Bradford method, and carries out SDS-PAGE enzymolysis. The Label-free mass spectrometry of the urine samples was performed by the OrbitrapFasion type mass spectrometer. And performing quantitative calculation on data obtained in the mass spectrum of the burn group and the normal control group. The differential polypeptide is screened by using the difference of protein expression amount more than 1.5 times and P <0.05 as a reference standard through statistical test. Then, the inventor identifies the differential polypeptide with statistical significance, and searches by using a database to obtain the differential protein kininogen-1.
Compared with healthy people, the kininogen-1 and the polypeptide fragment thereof are proved to be highly expressed in urine of burn patients and increase along with the aggravation of the burn degree by research, and have better consistency with clinical diagnosis. Therefore, the detection of the urine kininogen-1 and the polypeptide fragment thereof can be used for auxiliary diagnosis or disease condition monitoring of the burn.
The invention exerts the advantages of noninvasive acquisition, large-scale repeated sampling and convenient storage of the urine specimen, and utilizes the urine specimen to detect the urine kininogen-1 and the polypeptide fragment thereof.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a graph of the content of urokininogen-1 and its polypeptide fragments in different degree burn groups and healthy control groups.
FIG. 2 is a graph showing the trend of urinary kininogen-1 and its polypeptide fragments in different degree burn groups and healthy control groups.
Detailed Description
Example 1Collection and processing of urine specimens
Burn patients were selected as the burn group, and contemporary physical examiners were selected as the normal control group. 30ml samples of fresh morning urine were collected from each group of subjects after admission, and those who failed to urinate normally collected their morning urine from their catheters and placed in dry, clean containers. Centrifuging the collected urine specimen at 4000r/min for 5min, sucking supernatant, subpackaging 2ml per tube, and storing in a refrigerator at-80 ℃.
Example 2Mass spectrometry and screening of urine polypeptides
Extracting protein from urine sample, and determining the concentration of extracted protein. Mass spectrometry of urine samples was performed by orbitrapfuision type mass spectrometry. And performing quantitative calculation on data obtained in the mass spectrum of the experimental group and the normal control group. The comparison among groups adopts t-test to carry out differential analysis, and differential expression proteins are screened by using the difference of protein expression quantity more than 1.5 times and taking the statistical test that P <0.05 as a reference standard.
Example 3Identification and analysis of differential Polypeptides
The used database is a Unit _ Homo database, the generated mass spectrum original file is processed by MaxQuant software, and the retrieval parameter setting is shown in Table 1.
The urine kininogen-1 of burn patients is different from that of healthy people, as shown in figure 1, the change trend of the urine kininogen-1 in healthy control groups and burn groups with different degrees is shown in figure 2, and the expression of the kininogen-1 in the urine of the normal control groups and the burn groups is significantly different and is changed along with the different degrees of burn.
Although the present invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Sequence listing
<110> Zhang Man
<120> application of urokininogen-1 and polypeptide fragments thereof in burn
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<140> 20PKNG-1-CN
<141> 2020-05-30
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Leu Phe Lys Ala Val Asp Ala Ala Leu Lys Lys Tyr Asn Ser Gln Asn
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Gln Ser Asn Asn Gln Phe Val Leu Tyr Arg Ile Thr Glu Ala Thr Lys
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Thr Val Gly Ser Asp Thr Phe Tyr Ser Phe Lys Tyr Glu Ile Lys Glu
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Gly Asp Cys Pro Val Gln Ser Gly Lys Thr Trp Gln Asp Cys Glu Tyr
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Lys Asp Ala Ala Lys Ala Ala Thr Gly Glu Cys Thr Ala Thr Val Gly
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Lys Arg Ser Ser Thr Lys Phe Ser Val Ala Thr Gln Thr Cys Gln Ile
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Thr Pro Ala Glu Gly Pro Val Val Thr Ala Gln Tyr Asp Cys Leu Gly
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Cys Val His Pro Ile Ser Thr Gln Ser Pro Asp Leu Glu Pro Ile Leu
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Arg His Gly Ile Gln Tyr Phe Asn Asn Asn Thr Gln His Ser Ser Leu
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Phe Met Leu Asn Glu Val Lys Arg Ala Gln Arg Gln Val Val Ala Gly
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Leu Asn Phe Arg Ile Thr Tyr Ser Ile Val Gln Thr Asn Cys Ser Lys
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Glu Asn Phe Leu Phe Leu Thr Pro Asp Cys Lys Ser Leu Trp Asn Gly
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Asp Thr Gly Glu Cys Thr Asp Asn Ala Tyr Ile Asp Ile Gln Leu Arg
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Ile Ala Ser Phe Ser Gln Asn Cys Asp Ile Tyr Pro Gly Lys Asp Phe
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Val Gln Pro Pro Thr Lys Ile Cys Val Gly Cys Pro Arg Asp Ile Pro
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Thr Asn Ser Pro Glu Leu Glu Glu Thr Leu Thr His Thr Ile Thr Lys
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Leu Asn Ala Glu Asn Asn Ala Thr Phe Tyr Phe Lys Ile Asp Asn Val
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Lys Lys Ala Arg Val Gln Val Val Ala Gly Lys Lys Tyr Phe Ile Asp
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Phe Val Ala Arg Glu Thr Thr Cys Ser Lys Glu Ser Asn Glu Glu Leu
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Thr Glu Ser Cys Glu Thr Lys Lys Leu Gly Gln Ser Leu Asp Cys Asn
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Ala Glu Val Tyr Val Val Pro Trp Glu Lys Lys Ile Tyr Pro Thr Val
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Asn Cys Gln Pro Leu Gly Met Ile Ser Leu Met Lys Arg Pro Pro Gly
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Phe Ser Pro Phe Arg Ser Ser Arg Ile Gly Glu Ile Lys Glu Glu Thr
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Thr Val Ser Pro Pro His Thr Ser Met Ala Pro Ala Gln Asp Glu Glu
405 410 415
Arg Asp Ser Gly Lys Glu Gln Gly His Thr Arg Arg His Asp Trp Gly
420 425 430
His Glu Lys Gln Arg Lys His Asn Leu Gly His Gly His Lys His Glu
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Arg Asp Gln Gly His Gly His Gln Arg Gly His Gly Leu Gly His Gly
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His Glu Gln Gln His Gly Leu Gly His Gly His Lys Phe Lys Leu Asp
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Asp Asp Leu Glu His Gln Gly Gly His Val Leu Asp His Gly His Lys
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Asp Gly Leu Ser
Claims (9)
1. The urine kininogen-1 and the polypeptide fragment thereof are applied to the preparation of preparations for burn diagnosis, differential diagnosis, burn area and degree evaluation, treatment effect evaluation, monitoring, prognosis evaluation, mechanism research and the like.
2. The use of claim 1, wherein the amino acid sequence of urokininogen-1 is as shown in SEQ ID No. 1; or an amino acid sequence which is derived from the amino acid sequence shown in SEQ ID NO.1 and has the same function with the amino acid sequence shown in SEQ ID NO. 1.
3. The use of claim 1, wherein the preparation is a kit for detecting kininogen-1 and its polypeptide fragments in urine of burn patients.
4. Use according to claim 3, wherein the kit comprises one or more of an immunological method of antigen-antibody reaction and kits thereof, such as aptamer antibodies or antibody fragments capable of specifically binding kininogen-1 and polypeptide fragments thereof.
5. The use of claim 3, wherein the detection method comprises mass spectrometry and related kits for directly detecting kininogen-1 and its polypeptide fragments.
6. The use of claim 3, wherein the detection method comprises a method of directly detecting kininogen-1 and its polypeptide fragment or its related nucleic acid detection, and its related kit.
7. The use according to claim 3, wherein the kit further comprises a component selected from the group consisting of: the kit comprises a solid phase carrier, a diluent, a reference substance, a standard substance, a quality control substance, a detection antibody, a second antibody diluent, a luminescent reagent, a washing solution, a color development solution and a stop solution, wherein the solid phase carrier is any one or a combination of a plurality of the solid phase carrier, the diluent, the reference substance, the standard substance, the quality control substance, the detection antibody, the second antibody and the second antibody diluent.
8. The use of claim 7, wherein the standard comprises a kininogen-1 standard, a humanized tag antibody standard; preferably, the quality control product comprises: kininogen-1 control substances and humanized label antibody quality control substances; preferably, the solid support comprises: particles, microspheres, glass slides, test strips, plastic beads, liquid phase chips, micro-porous plates or affinity membranes and other carriers with the same functions.
9. The use of claim 8, wherein the solid phase carrier is made of any one of polyvinyl chloride, polystyrene, polyacrylamide, cellulose, and carriers with similar functions.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2927824A1 (en) * | 2013-10-21 | 2015-04-30 | Dyax Corp. | Assays for determining plasma kallikrein system biomarkers |
| US20150362493A1 (en) * | 2013-01-20 | 2015-12-17 | Dyax Corp. | Evaluation and treatment of bradykinin-mediated disorders |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150362493A1 (en) * | 2013-01-20 | 2015-12-17 | Dyax Corp. | Evaluation and treatment of bradykinin-mediated disorders |
| CA2927824A1 (en) * | 2013-10-21 | 2015-04-30 | Dyax Corp. | Assays for determining plasma kallikrein system biomarkers |
Non-Patent Citations (1)
| Title |
|---|
| ADAM A 等: "Plasma prokallikrein and kininogens in burned patients", THROMB RES, vol. 41, no. 4, 28 February 1986 (1986-02-28), pages 537 - 543, XP022918564, DOI: 10.1016/0049-3848(86)91699-3 * |
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