Abstract:
:Cyclin‑dependent kinase 5 regulatory subunit‑associated protein 3 (CDK5RAP3 or C53) is involved in the development of various types of tumor, and alternative splicing of C53 results in numerous transcription variants that encode different isoforms. The present study aimed to clone human C53 isoform d (IC53d) and explore its role in the proliferation of gastric cancer cells. Reverse transcription‑quantitative polymerase chain reaction was used to detect the expression levels of IC53d in 80 primary gastric adenocarcinoma tissues and adjacent normal tissues. In addition, the association between IC53d and clinicopathological parameters was determined. Gastric cancer cell lines stably overexpressing IC53d were established to observe its effects on cell proliferation, invasion and migration, and on in vivo tumorigenicity, and the mechanism of action was explored. The results of the presen study demonstrated that IC53d was upregulated in gastric cancer tissues and was associated with tumor T‑stage. Furthermore, overexpression of IC53d promoted the proliferation, colony formation and G1/S phase transition of gastric cancer cells, leading to enhancement of tumorigenesis in vitro and in vivo. Overexpression of IC53d also promoted phosphorylation of protein kinase B (AKT) and glycogen synthase kinase 3β (GSK3β), which increased the expression of cyclin D1. In addition, high cyclin D1 expression was associated with a significantly worse prognosis for patients compared with in patients with low cyclin D1 expression. These results indicated that IC53d may promote the phosphorylation of AKT and GSK3β, which in turn may increase cyclin D1 expression, enhancing G1/S phase transition, accelerating cell cycle progression, promoting the proliferation of gastric cancer cells, and inducing a poor prognosis in patients with gastric cancer.
journal_name
Oncol Repjournal_title
Oncology reportsauthors
Lin JX,Xie XS,Weng XF,Qiu SL,Xie JW,Wang JB,Lu J,Chen QY,Cao LL,Lin M,Tu RH,Li P,Huang CM,Zheng CHdoi
10.3892/or.2019.7042subject
Has Abstractpub_date
2019-05-01 00:00:00pages
2739-2752issue
5eissn
1021-335Xissn
1791-2431journal_volume
41pub_type
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