Int. J. Mol. Sci. 2013, 14(4), 7866-7879; doi:10.3390/ijms14047866
Article

Connexin 26 is Down-Regulated by KDM5B in the Progression of Bladder Cancer

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Received: 4 February 2013; in revised form: 20 February 2013 / Accepted: 6 March 2013 / Published: 11 April 2013
(This article belongs to the Section Molecular Diagnostics)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Connexin 26 (Cx26) expression is down-regulated and KDM5B (H3K4 demethylase) is up-regulated in the progression of bladder cancer, suggesting that Cx26 expression may be down-regulated by KDM5B in bladder cancer. To test the hypothesis, the HT1376 and T24 human bladder carcinoma cells were transfected with the plasmids pcDNA3.1-KDM5B, and caused the down-regulation of Cx26 expression. In contrast, the HT1376 and T24 cells transfected with the plasmids pTZU6+1-shRNA-KDM5B1 and pTZU6+1-shRNA-KDM5B2 caused the up-regulation of Cx26 expression. Immunohistochemistry and Spearman’s rank correlation analysis showed that the immunohistochemical expression of KDM5B and Cx26 was inversely related in bladder carcinoma tissues but no relationship in benign tissues. Taken together, these results indicate that KDM5B represses Cx26 expression in the bladder cancer development. Thus, a negative value to Cx26 immunohistochemical expression and a positive value to KDM5B immunohistochemical expression could be an ancillary diagnosis of primary bladder malignancy.
Keywords: KDM5B; connexin 26; HT1376 human bladder cancer cells; T24 human bladder cancer cells; real-time qPCR; immunohistochemistry; spearman’s rank correlation
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MDPI and ACS Style

Li, X.; Su, Y.; Pan, J.; Zhou, Z.; Song, B.; Xiong, E.; Chen, Z. Connexin 26 is Down-Regulated by KDM5B in the Progression of Bladder Cancer. Int. J. Mol. Sci. 2013, 14, 7866-7879.

AMA Style

Li X, Su Y, Pan J, Zhou Z, Song B, Xiong E, Chen Z. Connexin 26 is Down-Regulated by KDM5B in the Progression of Bladder Cancer. International Journal of Molecular Sciences. 2013; 14(4):7866-7879.

Chicago/Turabian Style

Li, Xin; Su, Yongping; Pan, Jinhong; Zhou, Zhansong; Song, Bo; Xiong, Enqing; Chen, Zhiwen. 2013. "Connexin 26 is Down-Regulated by KDM5B in the Progression of Bladder Cancer." Int. J. Mol. Sci. 14, no. 4: 7866-7879.

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