Monoclonal anti-idiotypic antibodies to platelet activating factor (PAF) and their interaction with PAF receptors
| Autor: | Chang Jin Wang, Hsin-Hsiung Tai |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Receptor complex
Platelet-activating factor biology medicine.drug_class Cell Biology respiratory system Monoclonal antibody Biochemistry Molecular biology chemistry.chemical_compound chemistry Cell surface receptor Polyclonal antibodies medicine biology.protein lipids (amino acids peptides and proteins) Platelet Antibody Receptor Molecular Biology |
| Zdroj: | Journal of Biological Chemistry. 266:12372-12378 |
| ISSN: | 0021-9258 |
| DOI: | 10.1016/s0021-9258(18)98907-6 |
| Popis: | Monoclonal anti-idiotypic antibodies (3C3F3E4 and 10D3F8H7) that interact with platelet activating factor (PAF) receptors were generated using an auto-anti-idiotypic approach by immunizing mice with an aldehydic analog of PAF coupled to bovine thyroglobulin. The resulting hybridomas were screened for anti-idiotypic antibody (anti-anti-PAF) with F(ab')2 fragments of affinity-purified polyclonal rabbit anti-PAF antibody. These antibodies displayed internal image properties of PAF and were considered as Ab2 beta according to the following criteria: (a) they bound to F(ab')2 fragments of the affinity-purified rabbit polyclonal anti-PAF antibody that had high affinity for PAF; (b) they inhibited [3H]PAF binding to rabbit polyclonal anti-PAF antibody and its F(ab')2 fragment in a concentration-dependent manner; (c) they displaced [3H]PAF from the anti-PAF antibody/[3H]PAF complex specifically; (d) they inhibited [3H]PAF binding to PAF receptors on rabbit platelet membranes dose dependently; (e) they displaced [3H]PAF from the [3H]PAF/PAF receptor complex specifically; and (f) they stimulated rabbit platelets to aggregate, and this aggregation could be inhibited or totally blocked by specific PAF receptor antagonists WEB 2086 and SRI 63-441. All of the above are consistent with the first successful production of monoclonal antibodies that mimic PAF and interact specifically with the PAF binding domain of PAF receptors on rabbit platelet membranes. |
| Databáze: | OpenAIRE |
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