Abstract
Carnosine and anserine are present in high concentrations in most skeletal muscles. In addition, carnosine and homocarnosine have been detected in brain and cardiac muscle. Other tissues have been found to be devoid of these histidine-containing dipeptides. However, Flancbaum et al. [5] reported that carnosine was present in every rodent and human tissue analyzed. These authors postulated that carnosine serves as a non-mast cell reservoir for histidine which becomes available for histamine synthesis during periods of physiological stress. We have analyzed many rat and human tissues using an immunohistochemical procedure. Carnosine and related dipeptides were detected in skeletal muscle, cardiac muscle and brain, but not in kidney, liver, lung or several other organs. These negative results seem valid since the immunoassay gave positive staining in the tissues generally known to contain carnosine.
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Jackson, M.C., Lenney, J.F. The distribution of carnosine and related dipeptides in rat and human tissues. Inflamm Res 45, 132–135 (1996). https://doi.org/10.1007/BF02265166
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DOI: https://doi.org/10.1007/BF02265166