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07 January 2019 : Laboratory Research  

Integrated Analysis of Genetic Abnormalities of the Histone Lysine Methyltransferases in Prostate Cancer

Yangjun Zhang12CD, Libin Yan12BE, Weimin Yao12FG, Ke Chen12F, Hua Xu12AG*, Zhangqun Ye12AG

DOI: 10.12659/MSM.912294

Med Sci Monit 2019; 25:193-239

Abstract

BACKGROUND: The histone methyltransferase (HMT) family includes histone lysine methyltransferases (HKMTs) and histone/protein arginine methyltransferases (PRMTs). The role of HMT gene variants in prostate cancer remains unknown. Therefore, this study aimed to evaluate HMT gene variants in the pathogenesis and prognosis of human prostate cancer, using in vitro cell studies and bioinformatics analysis.

MATERIAL AND METHODS: Integrative bioinformatics analysis of the expression of 51 HMT genes in human prostate cancer was based on datasets from the Cancer Genome Atlas (TCGA). Correlation and regression analysis were used to identify critical HMTs in prostate cancer. Kaplan-Meier and the area under the receiver operating characteristics curve (AUROC) were performed to evaluate the function of the HMTs on prognosis. Gene expression and function of 22Rv1 human prostate carcinoma cells were studied.

RESULTS: The HMT genes identified to have a role in the pathogenesis of prostate cancer included the EZH2, SETD5, PRDM12, NSD1, SETD6, SMYD1, and the WHSC1L1 gene. The EZH2, SETD5, and SMYD1 genes were selected as a prognostic panel, with the SUV420H2 HMT gene. SETD2, NSD1, and ASH1L were identified as critical genes in the development of castration-resistant prostate cancer (CRPC), similar to mixed-lineage leukemia (MLL) complex family members. Knockdown of the SETD5 gene in 22Rv1 prostate carcinoma cells in vitro inhibited cancer cell growth and migration.

CONCLUSIONS: HMT gene variants may have a role in the pathogenesis of prostate cancer. Future studies may determine the role of HMT genes as prognostic biomarkers in patients with prostate cancer.

Keywords: Epigenesis, Genetic, Histone-Lysine N-Methyltransferase, Prostatic Neoplasms, Carrier Proteins, DNA-Binding Proteins, Enhancer of Zeste Homolog 2 Protein, genetic variation, Histone Methyltransferases, Histones, Intracellular Signaling Peptides and Proteins, Male, Methyltransferases, Muscle Proteins, Nerve Tissue Proteins, Nuclear Proteins, Prognosis, Protein Methyltransferases, Transcription Factors

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750