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Monoclonal antibody of anti-human tissue kallikrein and preparation method thereof

A kallikrein and monoclonal antibody technology, applied in the field of immunochemistry, to achieve the effect of strong specificity, low cost and high titer

Inactive Publication Date: 2013-01-16
TONGJI HOSPITAL ATTACHED TO TONGJI MEDICAL COLLEGE HUAZHONG SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This antibody is a monoclonal antibody against a specific epitope of KLK1. There is no monoclonal antibody against this epitope at home and abroad. It has laid a solid foundation for the development of an efficient ELISA kit for the detection of kallikrein content in human tissues.

Method used

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  • Monoclonal antibody of anti-human tissue kallikrein and preparation method thereof
  • Monoclonal antibody of anti-human tissue kallikrein and preparation method thereof
  • Monoclonal antibody of anti-human tissue kallikrein and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of immunogen (12P-KLH) and coating agent (12P-BSA)

[0040] 12P is a polypeptide composed of 12 amino acids, which is close to the tail of human tissue kallikrein. It has no immunogenicity, only reactogenicity, and cannot directly stimulate animals to produce antibodies. It must be prepared by coupling with macromolecular proteins Adult artificial antigens can induce the body to produce specific antibodies. In this study, 12P was coupled to KLH and BSA by glutaraldehyde method to synthesize the immunogen and the coater.

[0041] 1.1 Materials

[0042] 12 peptides (NH2-Cys-Lys-Trp-Ile-Glu-Asp-Thr-Ile-Ala-Glu-Asn-Ser-COOH), Xi’an Meilian Company; hemocyanin (KLH), glutaraldehyde, sigma company ; Bovine serum albumin (BSA), glycine, Wuhan Lingfei Biological Co., Ltd.

[0043] 1.2 Synthesis of Human Tissue Kallikrein Immunogen

[0044] First, accurately weigh 10mg / ml polypeptide and dissolve it in PBS, take 700ul of it and place it in a 10ml test tube, add 1...

Embodiment 2

[0048] Preparation of anti-human tissue kallikrein monoclonal antibody

[0049] 2.1 Materials

[0050]12 peptides (NH2-Cys-Lys-Trp-Ile-Glu-Asp-Thr-Ile-Ala-Glu-Asn-Ser-COOH), Xi’an Midland Company; hemocyanin (KLH), glutaraldehyde, Freund’s Complete adjuvant (FCA), FICA; TMB, HAT (50×), HT (50×), sodium bicarbonate, DMSO, sigma company; bovine serum albumin (BSA), glycine, HRP label Goat anti-mouse IgG, PEG4000, RPMI1640, Wuhan Lingfei Biological Co., Ltd.; antibody affinity chromatography kit, PIERCE company; sodium chloride, disodium hydrogen phosphate, potassium dihydrogen phosphate, potassium chloride, liquid paraffin, spit Wen-20, Tianjin Omico Chemical Reagent Co., Ltd.; fetal bovine serum, HYCLONE company.

[0051] Balb / c mice (female, 6 weeks old) were stored in the Experimental Center of Tongji Medical College, Huazhong University of Science and Technology; SP2 / 0 were kept in this laboratory.

[0052] Reagent preparation:

[0053] (1) Coating buffer (PH9.6 0.05M ca...

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Abstract

A monoclonal antibody of anti-human tissue kallikrein and a preparation method thereof, wherein the monoclonal antibody of the anti-human tissue kallikrein is generated by the mouse hybridoma cell strain HTK CCTCC-200928; the antibody is a specific monoclonal antibody cell strain aiming at 12-peptide on one segment at the tail end of the anti-human tissue kallikrein, and is generated by inducing the ascites in the mouse body by hybridoma cell strain HTK and purifying. The method includes the following steps: 1) cross-linking the 12-peptide on the tail end of the artificially compounded anti-human tissue kallikrein with KLH and BSA as the immunogen and peridium gene; 2) immunizing the mouse; 3) screening the mouse with highest serum value; 4) melting the spleen and myeloma cell to obtain the hybridoma cell strain; 5) screening the hybridoma cell strain HTK; 6) expanding and culturing the hybridoma cell and injecting into the mouse abdominal cavity to generate the ascites; 7) purifying the ascites and getting the anti-human tissue kallikrein monoclonal antibody. The monoclonal antibody of the anti-human tissue kallikrein has strong specificity and high value.

Description

technical field [0001] The invention relates to a monoclonal antibody against human tissue kallikrein and a preparation method thereof, belonging to the technical field of immunochemistry. Background technique [0002] Human tissue kallikrein is a large multigene family consisting of 15 members. Only one of the human and animal tissue kallikreins efficiently releases the biologically active kinin from kininogen. In humans the enzyme is called pancreatic / kidney kallikrein, and the new unified designation KLK1 encodes the hk1 protein. hk1 can hydrolyze low-molecular-weight kininogen to generate kinin, and after kinin binds to the bradykinin B2 receptor on the membrane of vascular smooth muscle cells, it can increase NO in vascular smooth muscle, and then relax blood vessels through the cGMP second messenger pathway to achieve The purpose of reducing blood pressure. The content of kallikrein can be seen in both hereditary hypertension and spontaneous hypertension patients. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07K16/40C12N15/06C12P21/08
Inventor 汪道文张琴
Owner TONGJI HOSPITAL ATTACHED TO TONGJI MEDICAL COLLEGE HUAZHONG SCI TECH
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