Crosstalk between zinc and free fatty acids in plasma.
Crosstalk between zinc and free fatty acids in plasma.
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DOI:
10.1016/j.bbalip.2018.09.007
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发表时间:
2019-04
期刊:
影响因子:
--
通讯作者:
Blindauer CA
中科院分区:
文献类型:
--
作者:
Coverdale JPC;Khazaipoul S;Arya S;Stewart AJ;Blindauer CA
In mammalian blood plasma, serum albumin acts as a transport protein for free fatty acids, other lipids and hydrophobic molecules including neurodegenerative peptides, and essential metal ions such as zinc to allow their systemic distribution. Importantly, binding of these chemically extremely diverse entities is not independent, but linked allosterically. One particularly intriguing allosteric link exists between free fatty acid and zinc binding. Albumin thus mediates crosstalk between energy status/metabolism and organismal zinc handling. In recognition of the fact that even small changes in extracellular zinc concentration and speciation modulate the function of many cell types, the albumin-mediated impact of free fatty acid concentration on zinc distribution may be significant for both normal physiological processes including energy metabolism, insulin activity, heparin neutralisation, blood coagulation, and zinc signalling, and a range of disease states, including metabolic syndrome, cardiovascular disease, myocardial ischemia, diabetes, and thrombosis. Serum albumin binds and transports both free fatty acids and Zn2+ ions Elevated plasma free fatty acids impair Zn2+ binding by albumin through an allosteric mechanism The resulting changes in plasma zinc speciation are thought to impact blood coagulation and may promote thrombosis Increased free Zn2+ may lead to enhanced zinc export from plasma and dysregulation of zinc homeostasis in multiple tissues
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