Structure/function studies of T-2 mycotoxin with a monoclonal antibody

Area of Science:

• Immunology
• Toxicology
• Biochemistry

Background:

• Trichothecene mycotoxins, including T-2, pose significant health risks.
• Developing specific antibodies is crucial for detecting and neutralizing these toxins.
• Monoclonal antibodies offer high specificity for targeted toxin neutralization.

Purpose of the Study:

• To characterize a novel monoclonal antibody (mAb), HD11, specific for the T-2 mycotoxin.
• To evaluate the protective capacity of HD11 against T-2-induced cytotoxicity.
• To determine the fine specificity of HD11 binding to T-2 and its metabolites.

Main Methods:

• Generation of a BALB/C murine monoclonal antibody (mAb) specific for T-2.
• Enzyme-linked immuno-sorbent assay (ELISA) for T-2 detection.
• Cytotoxicity assays using human epidermoid carcinoma cell lines (Hep-2 and KB).
• Fine specificity analysis using structurally related T-2 metabolites.

Main Results:

• The anti-T-2 mAb, HD11, detected T-2 in nanogram quantities.
• HD11 (1 microgram/ml) completely protected Hep-2 and KB cells from T-2 cytotoxicity.
• HD11 binding specificity targets the R5 alkyl side chain and R2/R3 acetyl groups of T-2.
• HD11 neutralized the in vitro cytotoxicity of acetyl T-2 but not neosalaniol or 3' OH HT-2.

Conclusions:

• The HD11 mAb is a potent neutralizer of T-2 mycotoxin.
• HD11 exhibits high specificity for the T-2 toxin structure, particularly its side chains.
• This antibody holds potential for diagnostic and therapeutic applications against T-2 exposure.