SLPI promotes the gastric cancer growth and metastasis by regulating the expression of P53, Bcl-2 and Caspase-8

OBJECTIVE: The incidence of gastric cancer is very high all over the world, but the mechanism of the occurrence and development of gastric cancer is unclear. Secretory leukocyte protease inhibitor (SLPI) is overexpressed in gastric, lung and ovarian cancers, which accelerates the metastasis of cancer cells. In this research, we mainly explored the expression level and possible mechanism of SLPI in gastric cancer.

PATIENTS AND METHODS: The expression and clinical significance of SLPI in 68 cases of gastric cancer tissues and adjacent tissues were detected by qRT-PCR. Cell Counting Kit-8 (CCK8) assay was used to detect the proliferation ability of gastric cancer cell lines. In addition, we used Western blot to clarify the relationship between SLPI and metastasis.

RESULTS: Compared with the adjacent tissues, we found that SLPI was highly expressed in gastric cancer tissues. We also found that the expression of SLPI was in significant correlation with the survival time, clinical classification and size of the tumor. What’s more, SLPI could promote the proliferation and metastasis of gastric cancer by regulating P53, Bcl-2 and Caspase-8 expression through apoptosis signaling pathway.

CONCLUSIONS: We concluded that SLPI was closely related with to invasion and metastasis of gastric cancer. Perhaps we can hopefully find new targets for the treatment of gastric cancer.

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