代谢
尿酸酶是具有将尿酸转化为尿囊素功能的酶。考虑到人类没有任何内源性尿酸酶,尿酸是嘌呤降解中不需要的嘌呤核苷酸废物的唯一最终分解产物。人类尿液中尿囊素的存在随后是尿酸与活性氧种非酶促过程的结果。这样的非酶促过程因此可能适合作为衡量慢性疾病和衰老中氧化应激的生物标志物。此外,由于尿囊素是内源性的,并且是基本、自然代谢途径的一部分,因此预计不会积累。另外,尿囊素在人类和动物体内的代谢量被认为是可以忽略不计的。
Uricase is the enzyme that possesses the functionality to convert uric acid to allantoin. Considering humans do not possess any endogenous uricase, uric acid is the only final breakdown product in the purine degradation of unwanted waste product purine nucleotides. The presence of allantoin in human urine is subsequently the result of non-enzymatic processes on uric acid with reactive oxygen species. Such non-enzymatic processes are consequently potentially suitable biomarkers for measuring oxidative stress in chronic illnesses and aging. Furthermore, as allantoin is found endogenously and is part of basic, natural metabolic pathways, no accumulation is expected of it. Additionally, allantoin is not believed to be metabolized to a measurable extent in humans and animals.
来源:DrugBank