In vivo neutralization of tetrodotoxin by a monoclonal antibody.

This study examined the ability of monoclonal antibody against TTX to neutralize tetrodotoxin (TTX) in vivo. The mice were injected i.p. with 1.5 mouse units of TTX, followed 3 min later by administering graded doses of antibody immunoglobulin G (IgG). Animals injected with 100 micrograms IgG through the tail vein showed 100% survival. The 50% protective dose was c. 2 mg/kg. The present results indicate that monoclonal antibody can neutralize TTX in vivo.