title: Nuclear factor-κB signaling pathway is involved in phospholipase Cε-regulated proliferation in human renal cell carcinoma cells.
abstract: Phospholipase Cε (PLCε), a downstream effector of small GTPase superfamily, has been identified to play a crucial role in tumorigenesis. Previously, our studies have showed that PLCε promotes proliferation of renal cell carcinoma (RCC) cells. However, the molecular mechanisms by which PLCε enhances the survival phenotype of RCC cells are still not fully instructed. In the present study, we first demonstrated that PLCε was highly expressed and had a close correlation with Ki67 protein expression in RCC tissue samples. Further, we found that downregulation of PLCε expression repressed growth and induced apoptosis in RCC cells. In addition, we reported a mechanism by which knockdown of PLCε gene potently suppressed the nuclear factor kappa (NF-κB) signaling pathway through action on inhibitor of κB kinase. Moreover, silencing PLCε gene decreased vascular endothelial growth factor (VEGF) expression, which was a downstream growth factor of NF-κB signaling pathway. Finally, downregulation of VEGF was severely enhanced by treatment cells with NF-κB specific inhibitor BAY11-7028 in PLCε knockdown cells. Taken together, these findings suggest that PLCε promotes RCC cell growth via NF-κB-mediated upregulation of VEGF.
authors: The Key Laboratory of Diagnostics Medicine Designated by the Ministry of Education, Chongqing Medical University, Chongqing, People's Republic of China.
authors: Hong-Fei
authors: HF
authors: Du
authors: Li-Ping
authors: LP
authors: Ou
authors: Xue-Dong
authors: XD
authors: Song
authors: Yan-Ru
authors: YR
authors: Fan
authors: Xue
authors: X
authors: Yang
authors: Bing
authors: B
authors: Tan
authors: Zhen
authors: Z
authors: Quan
authors: Chun-Li
authors: CL
authors: Luo
authors: Xiao-Hou
authors: XH
authors: Wu
mesh_terms: D002292:Carcinoma, Renal Cell / Q000235:genetics*; D045744:Cell Line, Tumor; D049109:Cell Proliferation; D015536:Down-Regulation / Q000235:genetics; D005260:Female; D006801:Humans; D019394:Ki-67 Antigen / Q000235:genetics; D007680:Kidney Neoplasms / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D016328:NF-kappa B / Q000235:genetics*; D054801:Phosphoinositide Phospholipase C / Q000235:genetics*; D015398:Signal Transduction / Q000235:genetics*; D042461:Vascular Endothelial Growth Factor A / Q000235:genetics
chemical_list: D019394:Ki-67 Antigen; D016328:NF-kappa B; D042461:Vascular Endothelial Growth Factor A; D054801:Phosphoinositide Phospholipase C; C423320:phospholipase C epsilon