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Updated: Feb 10, 2026
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Generation of Monoclonal Antibodies Against Natural Products
Published on: April 6, 2019
11.6K
Monoclonal antibodies against ricin: effects on toxin function.
Hybridoma
|January 1, 1986
Summary
Monoclonal antibodies targeting ricin toxin were developed. Some antibodies enhanced ricin
Area of Science:
- Immunology
- Toxicology
- Cell Biology
Background:
- Ricin toxin poses a significant biological threat.
- Development of effective countermeasures against ricin is crucial.
- Monoclonal antibodies (mAbs) offer potential therapeutic strategies.
Purpose of the Study:
- To produce and characterize monoclonal antibodies against ricin toxin.
- To investigate the effects of these mAbs on ricin's cytotoxic activity in leukemic cells.
- To evaluate the potential of mAbs as protective or enhancing agents against ricin.
Main Methods:
- Production of monoclonal antibodies against ricin A-chain and whole ricin.
- Characterization of antibody binding to ricin fragments using radioimmunobinding assays.
- Assessment of antibody effects on ricin-induced cytotoxicity in cultured leukemic cells, including quantitative cloning experiments.
- Analysis of antibody influence on ricin binding to target cells.
Main Results:
- Specific monoclonal antibodies were generated, recognizing different ricin epitopes.
- Certain antibodies (207 E5, 216 B3) demonstrated dose-dependent effects on ricin toxicity.
- Antibody 207 E5 provided protection by inhibiting ricin binding, while 216 B3 enhanced ricin's activity.
- Antibody 216 B3 significantly increased ricin's potency in quantitative cloning assays.
Conclusions:
- Monoclonal antibodies against ricin can modulate its biological activity.
- Specific antibodies can either neutralize ricin's toxic effects or enhance them.
- These findings highlight the complex interactions between antibodies and ricin, with implications for antitoxin development.
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