Inhibition of PRL-3 gene expression in gastric cancer cell line SGC7901 via microRNA suppressed reduces peritoneal metastasis |
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Authors: | Li Zhengrong Zhan Wenhua Wang Zhao Zhu Baohe He Yulong Peng Junsheng Cai Shirong Ma Jinping |
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Institution: | Department of Gastrointestinopancreatic Surgery, First Affiliated Hospital, Sun Yat-sen University, Gastric Center of Sun Yat-sen University, Guangzhou 510080, China. |
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Abstract: | High expression of PRL-3, a protein tyrosine phosphatase, is proved to be associated with lymph node metastasis in gastric carcinoma from previous studies. In this paper, we examined the relationship between PRL-3 expression and peritoneal metastasis in gastric carcinoma. We applied the artificial miRNA (pCMV-PRL3miRNA), which is based on the murine miR-155 sequence, to efficiently silence the target gene expression of PRL-3 in SGC7901 gastric cancer cells at both mRNA and protein levels. Then we observed that, in vitro, pCMV-PRL3miRNA significantly depressed the SGC7901 cell invasion and migration independent of cellular proliferation. In vivo, PRL-3 knockdown effectively suppressed the growth of peritoneal metastases and improved the prognosis in nude mice. Therefore, we concluded that artificial miRNA can depress the expression of PRL-3, and that PRL-3 might be a potential therapeutic target for gastric cancer peritoneal metastasis. |
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Keywords: | PRL-3 Gastric cancer Peritoneal metastasis RNA interference MicroRNA Plasmid vector |
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