| First Author | Schmitt JF | Year | 2002 |
| Journal | Mol Endocrinol | Volume | 16 |
| Issue | 2 | Pages | 213-20 |
| PubMed ID | 11818495 | Mgi Jnum | J:74297 |
| Mgi Id | MGI:2158035 | Doi | 10.1210/mend.16.2.0771 |
| Citation | Schmitt JF, et al. (2002) Hypermethylation of the inhibin alpha-subunit gene in prostate carcinoma. Mol Endocrinol 16(2):213-20 |
| abstractText | Inhibin is composed of an alpha- and a beta-subunit. Transgenic studies assigned a tumor-suppressive role to the inhibin alpha-subunit, and in human prostate cancer inhibin alpha-subunit gene expression was down-regulated. This study examined the inhibin alpha-subunit gene promoter and gene locus to determine whether promoter hypermethylation or LOH occurred in DNA from prostate cancer. The 5'-untranslated region of the human inhibin alpha-subunit gene was sequenced and shown to be highly homologous to the bovine, rat, and mouse inhibin alpha-subunit promoter sequences. A 135-bp region of the human promoter sequence that continued a cluster of CpG sites was analyzed for hypermethylation. Significant (P < 0.001) hypermethylation of the inhibin alpha-subunit gene promoter occurred in DNA from Gleason pattern 3, 4, and 5 carcinomas compared with nonmalignant tissue samples. A subset of the carcinomas with a cribriform pattern were unmethylated. LOH at 2q32-36, the chromosomal region harboring the inhibin alpha-subunit gene, was observed in 42% of prostate carcinomas. These data provide the first demonstration that promoter hypermethylation and LOH are associated with the inhibin alpha-subunit gene and gene locus in prostate cancer. |
