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ORIGINAL ARTICLE
Year : 2015  |  Volume : 1  |  Issue : 6  |  Page : 183-187

Galanin is a novel epigenetic silenced functional tumor suppressor in renal cell carcinoma


1 Department of Urology, Chinese PLA General Hospital, Beijing, China
2 Cipher Ground, North Brunswick, NJ, USA

Correspondence Address:
Yingduan Cheng
Cipher Ground, 675 Rt. 1 South, North Brunswick, NJ 08902
USA
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/2395-3977.172861

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Aim: To assess the expression level and function of Galanin in renal cell carcinoma (RCC). Methods: The expression level of Galanin in a series of RCC cell lines (769P, 786-O, A498, Caki-1, and ACHN) was studied. 786-O cells were exposed to pharmacological demethylation to assess the involvement of promoter methylation downregulation of Galanin level. Galanin normal expressed ACHN cell line was knockdown with siRNA and was further used to study its role in cell proliferation and invasion. The downstream targets were screened by real time-polymerase chain reaction. Results: Galanin was downregulated in two (786-O and A498) out of five RCC cell lines. Pharmacological demethylation restored the Galanin expression to normal levels in 786-O cells suggesting of its downregulation through promoter methylation. Knockdown of Galanin resulted in increased proliferation and invasion ability of ACHN cells while increasing the expression of oncogenes MYC, CCND1, and FRA1. Conclusion: The above results suggest that Galanin behaves as a tumor suppressor gene in RCC and may be of clinical importance as a potential biomarker and therapeutic target in renal cancer patients.


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