Different expression patterns of histone H3K27 demethylases in renal cell carcinoma and bladder cancer

UTX and JMJD3 are recently identified histone H3 lysine 27 (H3K27) demethylases. Many studies have shown aberrant H3K27 trimethylation (H3K27me3) levels widely exist in multiple cancers, and that altered H3K27me3 levels are correlated with tumorigenesis and tumor progression. To investigate expression patterns of UTX and JMJD3 genes in renal cell carcinoma (RCC) and bladder cancer and the relationship between gene expression and tumor development.

Samples were collected from 35 patients with RCC and 21 patients with bladder cancer and qRT-PCR was performed.

By comparing with adjacent normal tissues, the expression of JMJD3 (10/21 = 47.62%) and UTX (10/21 = 47.62%) were significantly upregulated in bladder cancer tissues and the expression of JMJD3 (15/35 = 42.86%) was significantly downregulated in RCC tissues. Stratified analyses revealed that upregulated expression of JMJD3 was significantly associated with poorly differentiated tumor nuclear grade (p= 0.005) and advanced clinical stage (p= 0.043) in the bladder cancer group, while downregulated expression of JMJD3 was significantly associated with advanced clinical stage (p= 0.045) and poorly differentiated tumor nuclear grade (p= 0.011) in the RCC group.

These results suggest JMJD3 could be a hallmark and is involved in the development of RCC and bladder cancers. The potential role of H3K27 demethylases as biomarkers needs further investigations.

Cancer biomarkers : section A of Disease markers. 2016 Dec 09 [Epub ahead of print]

Zehui Hong, Hui Li, Lili Li, Weilong Wang, Ting Xu

Department of Genetics and Developmental Biology, Medical School of Southeast University, The Key Laboratory of Developmental Genes and Human Disease in Ministry of Education, Nanjing 210009, Jiangsu, China., Institute of Life Sciences, The Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing 210096, Jiangsu, China., Department of Urologic Surgery, The Affiliated Cancer Hospital of Jiangsu Province of Nanjing Medical University, Nanjing, Jiangsu, China.