摘要：Free aqueous metabolites in meat, fat and egg of a 4-year-old female Siberian sturgeon were analyzed in a metabolomic perspective. A total of 245 metabolites were detected and 91 were quantified. Major common metabolites among meat, fat and egg were lactic acid, creatine and alanine. There were some tissue-specific metabolites but at only minor levels. Carnosine, a dipeptide consisting of β-alanine and histidine and known for its geroprotetive (anti-aging) function, occurred in abundance in meat and fat but was not detected in egg. The same tendency was seen for another major metabolite, betaine (also known as N,N,N-trimethylglycine). These metabolomic profiles well characterized and discriminated meat, fat and egg, which were primarily characterized with creatine, betaine/choline and glutamic acid, respectively. The metabolite profile help developing aquacultural feed for sturgeons as well as utilizing sturgeons for human nutrition.
