The effects of homocarnosine and GABA on antibody production (PFC reaction) and cellular immunity (delayed hypersensitivity reaction, DHR) were examined in vivo. In mice treated with these agents, PFC reaction to 2 X 10(7) SRBC was enhanced but that to 1 X 10(9) SRBC was suppressed; moreover,
The imidazole structure is involved in the formation of several compounds in the human metabolism including methyl imidazole, imidazole acetic acid, histidine, histamine, carnosine and homocarnosine. A number of these compounds are widely distributed metabolites such as histamine which is present in