Abstract
PRDM5 has been proposed as a tumor suppressor frequently downregualted in tumor. In this study, lung squamous cell carcinoma tissues and adjacent nontumorous normal tissues were collected from 30 patients. PRDM5 expression was detected by reverse transcription polymerase chain reaction and Western blot analysis, DNA methylation of PRDM5 promoter was analyzed by methylation-specific PCR. SK-MES-1 cells or xenografts in nude mice were treated with 5-aza-2′-deoxycitydine, and cell proliferation and tumor growth in nude mice were examined. We found that PRDM5 promoter was methylated and PRDM5 expression at both mRNA and protein levels was reduced in lung squamous cell carcinoma tissues. Furthermore, PRDM5 promoter methylation was significantly correlated with tumor differentiation and lymph node metastasis of lung squamous cell carcinoma, but not with age, gender, smoking, or tumor grade. 5-aza-2′-deoxycitydine inhibited the proliferation of SK-MES-1 cells and the growth of xenografts in nude mice, accompanied by reduced methylation of PRDM5 promoter and increased expression of PRDM5. Taken together, our data suggest that PRDM5 is a tumor suppressor in lung cancer and is a promising target for the diagnosis, prognosis, and therapy of lung squamous cell carcinoma.
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Jemal A, Bray F, Center MM, et al. Global cancer statistics. CA Cancer J Clin. 2011;61:69–90.
Drilon A, Rekhtman N, Ladanyi M, Paik P. Squamous-cell carcinomas of the lung: emerging biology, controversies, and the promise of targeted therapy. Lancet Oncol. 2012;13:e418–26.
Brzeziańska E, Dutkowska A, Antczak A. The significance of epigenetic alterations in lung carcinogenesis. Mol Biol Rep. 2013;40:309–25.
Zhang Y, Xu R, Li G, Xie X, Long J, Wang H. Loss of expression of the differentially expressed in adenocarcinoma of the lung (DAL-1) protein is associated with metastasis of non-small cell lung carcinoma cells. Tumour Biol. 2012;33:1915–25.
Yu Y, Yin D, Hoque MO, Cao B, Jia Y, Yang Y, et al. AKT signaling pathway activated by HIN-1 methylation in non-small cell lung cancer. Tumour Biol. 2012;33:307–14.
Wu H, Min J, Lunin VV, Antoshenko T, et al. Structural biology of human H3K9 methyltransferases. PLoS One. 2010;5:e8570.
Fog CK, Galli GG, Lund AH. PRDM proteins: important players in differentiation and disease. Bioessays. 2012;34:50–60.
Deng Q, Huang S. PRDM5 is silenced in human cancers and has growth suppressive activities. Oncogene. 2004;23:4903–10.
Cheng HY, Chen XW, Cheng L, et al. DNA methylation and carcinogenesis of PRDM5 in cervical cancer. J Cancer Res Clin Oncol. 2010;136:1821–5.
Watanabe Y, Toyota M, Kondo Y, et al. PRDM5 identified as a target of epigenetic silencing in colorectal and gastric cancer. Clin Cancer Res. 2007;13:4786–94.
Gronbaek K, Hother C, Jones PA. Epigenetic changes in cancer. APMIS. 2007;115:1039–159.
Khandige S, Shanbhogue VV, Chakrabarty S, Kapettu S. Methylation markers: a potential force driving cancer diagnostics forward. Oncol Res. 2011;19:105–10.
Van Den Broeck A, Ozenne P, Eymin B, et al. Lung cancer: a modified epigenome. Cell Adh Migr. 2010;4:107–13.
Ding HL, Clouthier DE, Artinger KB. Redundant roles of PRDM family members in zebrafish craniofacial development. Dev Dyn. 2013;242:67–79.
Hohenauer T, Moore AW. The Prdm family: expanding roles in stem cells and development. Development. 2012;139:2267–82.
Kinameri E, Inoue T, Aruga J, et al. Prdm proto-oncogene transcription factor family expression and interaction with the Notch-Hes pathway in mouse neurogenesis. PLoS One. 2008;3:e3859.
Acknowledgments
This study was supported by the Natural Science Foundation of Hunan Province (no. 11JJ310).
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The authors declared that they have no conflict of interests.
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Tan, SX., Hu, RC., Tan, YL. et al. Promoter methylation-mediated downregulation of PRDM5 contributes to the development of lung squamous cell carcinoma. Tumor Biol. 35, 4509–4516 (2014). https://doi.org/10.1007/s13277-013-1593-2
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DOI: https://doi.org/10.1007/s13277-013-1593-2