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Overexpression of deubiquitinating enzyme USP28 promoted non‐small cell lung cancer growth
Abstract Non‐small cell lung cancer (NSCLC) accounts for most lung cancer. To develop new therapy required the elucidation of NSCLC pathogenesis. The deubiquitinating enzymes USP 28 has been identified and studied in colon and breast carcinomas. However, the role of USP28 in NSCLC is unknown. The level mRNA or protein level of USP28 were measured by qRT‐PCR or immunohistochemistry (IHC). The role of USP28 in patient survival was revealed by Kaplan–Meier plot of overall survival in NSCLC patients. USP28 was up or down regulated by overexpression plasmid or siRNA transfection. Cell proliferation and apoptosis was assay...
Source: Journal of Cellular and Molecular Medicine - February 5, 2015 Category: Molecular Biology Authors: Lei Zhang, Biao Xu, Yong Qiang, Hairong Huang, Changtian Wang, Demin Li, Jianjun Qian Tags: Original Article Source Type: research

Connexin 31.1 degradation requires the Clathrin‐mediated autophagy in NSCLC cell H1299
In this study, Cx31.1 was suggested to be degraded through both ubiquitin–proteasome system (UPS) and autophagy. Blockage of UPS with MG‐132 increased Cx31.1 level, but could not inhibit the degradation of Cx31.1 completely. In H1299 cells stably expressing Cx31.1, Cx31.1 reduced when autophagy was induced through starvation or Brefeldin A treatment. Knockdown of autophagy‐related protein ATG5 could increase the cellular level of Cx31.1 both under normal growth condition and starvation‐induced autophagy. Colocalization of Cx31.1 and autophagy marker light chain 3 (LC3) was revealed by immunofluorescence analysis. C...
Source: Journal of Cellular and Molecular Medicine - November 11, 2014 Category: Molecular Biology Authors: Xingli Zhu, Zhenchao Ruan, Xiufang Yang, Kaili Chu, Hai Wu, Yao Li, Yan Huang Tags: Original Article Source Type: research