Monoclonal antibodies against human basic fibroblast growth factor.

Area of Science:

• Biotechnology
• Immunology
• Protein Chemistry

Background:

• Recombinant human basic fibroblast growth factor (hbFGF) is crucial in various biological processes.
• Developing specific antibodies is essential for hbFGF detection and research.
• Existing methods may lack specificity or sensitivity for hbFGF analysis.

Purpose of the Study:

• To generate and characterize monoclonal antibodies (MAbs) against hbFGF.
• To identify the epitopes recognized by these MAbs.
• To develop sensitive detection assays and purification methods for hbFGF.

Main Methods:

• Somatic cell fusion technique to produce MAbs.
• Isotype identification and binding assays using recombinant hbFGF.
• Epitope mapping via competition assays with synthetic peptides and truncated hbFGF.
• Development of a two-site enzyme immunoassay (EIA).
• Affinity chromatography using a MAb for hbFGF purification.

Main Results:

• Four MAbs (MAb12, MAb98, MAb52, MAb78) were successfully developed against hbFGF.
• Two distinct epitopes were identified: one within the first 9 amino acids (recognized by MAb12, MAb78) and another between residues 14-40 (recognized by MAb52, MAb98).
• A sensitive two-site EIA capable of detecting 0.5 ng/ml hbFGF was established.
• MAb78 proved effective for purifying hbFGF mutein CS4 via affinity chromatography.

Conclusions:

• The developed MAbs offer high specificity for hbFGF.
• These MAbs facilitate sensitive hbFGF detection and purification.
• The findings contribute to advanced tools for hbFGF research and applications.