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Previous studies by our group have demonstrated that the calcium imbalance in rat hepatic stellate cells (HSCs) can induce endoplasmic reticulum stress (ERS) and promote cell apoptosis. KN-62, an inhibitor of Calmodulin kinase II (CaMK II), can decrease the expression of CaMK II that plays a major role in regulating the steady state of intracellular Ca2+. Uridine triphosphate (UTP) plays a biological role in increasing indirectly the level of intracellular Ca2+. In the experiment, we demonstrate that KN-62 and UTP can inhibit the proliferation and promote the apoptosis in HSCs, increase the level of intracellular Ca2+ and the expression of ERS protein GRP78, and increase the apoptosis protein Caspase-12 and Bax expression, while decrease the expression of Bcl-2 protein. Our findings indicate that the CaMK II/Ca2+ signaling pathway regulates the ERS apoptosis pathway and induces HSC apoptosis. Copyright © 2021 Elsevier B.V. All rights reserved.


Haiying Liu, Luguang Wang, Linyu Dai, Fumin Feng, Yonghong Xiao. CaMK II/Ca2+ dependent endoplasmic reticulum stress mediates apoptosis of hepatic stellate cells stimulated by transforming growth factor beta 1. International journal of biological macromolecules. 2021 Mar 01;172:321-329

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PMID: 33454324

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