title: Connexin 26 is down-regulated by KDM5B in the progression of bladder cancer.
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.
authors.affiliation: Urologic Institute of PLA, Southwest Hospital, Third Military Medical University, Chongqing 400038, China. yongpingsucq@163.com.
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.forename: Yongping
authors.initials: Y
authors.lastname: Su
authors.forename: Jinhong
authors.initials: J
authors.lastname: Pan
authors.forename: Zhansong
authors.initials: Z
authors.lastname: Zhou
authors.forename: Bo
authors.initials: B
authors.lastname: Song
authors.forename: Enqing
authors.initials: E
authors.lastname: Xiong
authors.forename: Zhiwen
authors.initials: Z
authors.lastname: Chen
mesh_terms: D045744:Cell Line, Tumor; D000072259:Connexin 26; D017630:Connexins / Q000096:biosynthesis* / Q000235:genetics; D015536:Down-Regulation; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007150:Immunohistochemistry; D056484:Jumonji Domain-Containing Histone Demethylases / Q000235:genetics / Q000378:metabolism*; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism*; D009687:Nuclear Proteins / Q000235:genetics / Q000378:metabolism*; D012097:Repressor Proteins / Q000235:genetics / Q000378:metabolism*; D001749:Urinary Bladder Neoplasms / Q000235:genetics / Q000378:metabolism* / Q000473:pathology
chemical_list: D017630:Connexins; C000607042:GJB2 protein, human; D009363:Neoplasm Proteins; D009687:Nuclear Proteins; D012097:Repressor Proteins; D000072259:Connexin 26; D056484:Jumonji Domain-Containing Histone Demethylases; C119611:KDM5B protein, human