title: Altered methylation of multiple genes in carcinogenesis of the prostate.
abstract: The methylation status of 7 genes was examined in four cell lines, 36 samples of benign prostatic hyperplasia (BPH), 20 samples of prostatic intraepithelial neoplasia (PIN) and 109 samples of prostate cancer (PCa), using methylation-specific PCR (MSP): the pi-class glutathione S-transferase (GSTP1), retinoic acid receptor beta 2(RARbeta2), androgen receptor (AR), death-associated protein kinase (DAPK), tissue inhibitor of metalloproteinase-3 (TIMP-3), O(6)-methylguanine DNA methyltransferase (MGMT), and hypermethylated in cancer-1 (HIC-1). The frequencies of methylation in PCa were 88% for GSTP1, 78% for RARbeta2, 36% for DAPK, 15% for AR, 6% for TIMP-3, and 2% for MGMT, whereas the values were 11% for AR and DAPK, 6% for TIMP-3, 3% for GSTP1, and 0 for RARbeta2 and MGMT in BPH. Aberrant methylation of the GSTP1 and RARbeta2 genes was detected in 30% and 20% of PIN, respectively. Most samples of BPH and PCa were positive for HIC-1 methylation. Regarding accumulation of methylated cancer-related genes, there were significant correlations between PCa and BPH as well as PIN and BPH. In the present study, a high frequency of aberrant promoter methylation of the GSTP1 and RARbeta2 genes was noted in PCa. Our findings suggest that methylation of cancer-related genes may be involved in carcinogenesis of the prostate.
authors.affiliation: Second Department of Pathology, Mie University School of Medicine, Mie, Japan.
authors.forename: Mikio
authors.initials: M
authors.lastname: Yamanaka
authors.forename: Masatoshi
authors.initials: M
authors.lastname: Watanabe
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Yamada
authors.forename: Akimitsu
authors.initials: A
authors.lastname: Takagi
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Murata
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Takahashi
authors.forename: Hiroyoshi
authors.initials: H
authors.lastname: Suzuki
authors.forename: Haruo
authors.initials: H
authors.lastname: Ito
authors.forename: Hiromasa
authors.initials: H
authors.lastname: Tsukino
authors.forename: Takahiko
authors.initials: T
authors.lastname: Katoh
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Sugimura
authors.forename: Taizo
authors.initials: T
authors.lastname: Shiraishi
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D051017:Apoptosis Regulatory Proteins; D014408:Biomarkers, Tumor / Q000235:genetics*; D017871:Calcium-Calmodulin-Dependent Protein Kinases / Q000235:genetics; D019175:DNA Methylation; D017931:DNA Primers / Q000737:chemistry; D064550:Death-Associated Protein Kinases; D015971:Gene Expression Regulation, Enzymologic; D015972:Gene Expression Regulation, Neoplastic; D051549:Glutathione S-Transferase pi; D005982:Glutathione Transferase / Q000235:genetics; D006801:Humans; D007527:Isoenzymes / Q000235:genetics; D008297:Male; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000235:genetics*; D019853:O(6)-Methylguanine-DNA Methyltransferase / Q000235:genetics; D016133:Polymerase Chain Reaction; D011401:Promoter Regions, Genetic / Q000235:genetics*; D017430:Prostate-Specific Antigen / Q000235:genetics; D011470:Prostatic Hyperplasia / Q000201:enzymology / Q000235:genetics / Q000473:pathology; D019048:Prostatic Intraepithelial Neoplasia / Q000201:enzymology / Q000235:genetics / Q000473:pathology; D011471:Prostatic Neoplasms / Q000201:enzymology / Q000235:genetics* / Q000473:pathology; D011944:Receptors, Androgen / Q000235:genetics; D018168:Receptors, Retinoic Acid / Q000235:genetics; D019717:Tissue Inhibitor of Metalloproteinase-3 / Q000235:genetics
chemical_list: D051017:Apoptosis Regulatory Proteins; D014408:Biomarkers, Tumor; D017931:DNA Primers; D007527:Isoenzymes; D009363:Neoplasm Proteins; D011944:Receptors, Androgen; D018168:Receptors, Retinoic Acid; D019717:Tissue Inhibitor of Metalloproteinase-3; C082925:retinoic acid receptor beta; D019853:O(6)-Methylguanine-DNA Methyltransferase; C496556:GSTP1 protein, human; D051549:Glutathione S-Transferase pi; D005982:Glutathione Transferase; D064550:Death-Associated Protein Kinases; D017871:Calcium-Calmodulin-Dependent Protein Kinases; D017430:Prostate-Specific Antigen