Human ribosomal protein S13 promotes gastric cancer growth through down-regulating p27(Kip1).

Journal of Cellular and Molecular Medicine
Xueyan GuoDaiming Fan

Abstract

Our previous works revealed that human ribosomal protein S13 (RPS13) was up-regulated in multidrug-resistant gastric cancer cells and overexpression of RPS13 could protect gastric cancer cells from drug-induced apoptosis. The present study was designed to explore the role of RPS13 in tumorigenesis and development of gastric cancer. The expression of RPS13 in gastric cancer tissues and normal gastric mucosa was evaluated by immunohistochemical staining and Western blot analysis. It was found RPS13 was expressed at a higher level in gastric cancer tissues than that in normal gastric mucosa. RPS13 was then genetically overexpressed in gastric cancer cells or knocked down by RNA interference. It was demonstrated that up-regulation of RPS13 accelerated the growth, enhanced in vitro colony forming and soft agar cologenic ability and promoted in vivo tumour formation potential of gastric cancer cells. Meanwhile, down-regulation of RPS13 in gastric cancer cells resulted in complete opposite effects. Moreover, overexpression of RPS13 could promote G1 to S phase transition whereas knocking down of RPS13 led to G1 arrest of gastric cancer cells. It was further demonstrated that RPS13 down-regulated p27(kip1) expression and CDK2 kinase act...Continue Reading

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Citations

Jan 1, 2014·Cancer Metastasis Reviews·A de Las Heras-RubioM E LLeonart
Mar 5, 2015·Journal of Molecular Cell Biology·Xiang ZhouHua Lu
Dec 22, 2011·Journal of Bioinformatics and Computational Biology·Tong Tong WuEdmund M Clarke
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Dec 8, 2021·Bioscience Reports·Wendy El Khoury, Zeina Nasr
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Methods Mentioned

BETA
PCR
transfection
biopsies
X-ray
FCS
xenografts
co-immunoprecipitation

Software Mentioned

CellQuest
SPSS

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