PERK in beta cell biology and insulin biogenesis.
PERK in beta cell biology and insulin biogenesis.
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DOI:
10.1016/j.tem.2010.08.005
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发表时间:
2010-12
影响因子:
10.9
通讯作者:
McGrath, Barbara C.
中科院分区:
文献类型:
--
作者:
Cavener, Douglas R.;Gupta, Sounak;McGrath, Barbara C.
PERK (EIF2AK3) was originally discovered as a major component of the Unfolded Protein Response (UPR). PERK deficiency results in permanent neonatal diabetes, which was initially thought to be caused by a failure to regulate ER stress in insulin-secreting beta cells, culminating in beta cell death. However, subsequent studies found that low beta cell mass was due to reduced cell proliferation, rather than increased apoptosis. Genetic and cellular studies of Perk-deficient beta cells showed that PERK was critically required for ER functions including proinsulin trafficking and quality control, unrelated to the ER stress pathway. Under normal physiological conditions, changes in ER calcium levels, mediated by glucose and other insulin secretagogues, regulate PERK activity for the purpose of controlling insulin biogenesis.
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