代谢
锌可以通过肺部、皮肤和胃肠途径进入人体。肠道对锌的吸收是由锌载体蛋白CRIP控制的。锌还与金属硫蛋白结合,有助于防止过量锌的吸收。锌在体内广泛分布,存在于所有组织和组织液中,尤其在肝脏、胃肠道、肾脏、皮肤、肺、大脑、心脏和胰腺中含量较高。在血液中,锌存在于红细胞中的碳酸酐酶结合物中,以及血浆中的白蛋白、α2-巨球蛋白和氨基酸结合物中。白蛋白和氨基酸结合的锌可以通过组织膜扩散。锌通过尿液和粪便排出体外。氰化物可以通过口服、吸入和皮肤途径迅速吸收并在全身分布。氰化物主要通过 rhodanese 或 3-巯基丙酸硫转移酶代谢成硫氰酸盐。氰化物的代谢物通过尿液排出体外。(L49,L96)
Zinc can enter the body through the lungs, skin, and gastrointestinal tract. Intestinal absorption of zinc is controlled by zinc carrier protein CRIP. Zinc also binds to metallothioneins, which help prevent absorption of excess zinc. Zinc is widely distributed and found in all tissues and tissues fluids, concentrating in the liver, gastrointestinal tract, kidney, skin, lung, brain, heart, and pancreas. In the bloodstream zinc is found bound to carbonic anhydrase in erythrocytes, as well as bound to albumin, _2-macroglobulin, and amino acids in the the plasma. Albumin and amino acid bound zinc can diffuse across tissue membranes. Zinc is excreted in the urine and faeces. Cyanide is rapidly alsorbed through oral, inhalation, and dermal routes and distributed throughout the body. Cyanide is mainly metabolized into thiocyanate by either rhodanese or 3-mercaptopyruvate sulfur transferase. Cyanide metabolites are excreted in the urine. (L49, L96)
来源:Toxin and Toxin Target Database (T3DB)