PMID- 23225431 OWN - NLM STAT- MEDLINE DCOM- 20130502 LR - 20121210 IS - 1791-7530 (Electronic) IS - 0250-7005 (Linking) VI - 32 IP - 12 DP - 2012 Dec TI - Detection of numerical abnormalities of chromosome 9 and p16/CDKN2A gene alterations in ovarian cancer with fish analysis. PG - 5309-13 AB - BACKGROUND: The molecular events leading to the development of ovarian cancer are not well-established. Defects of the retinoblastoma protein (pRb)/cyclin-D1/p16 pathway have been shown to play a critical role in the development of human malignancies. In particular, the p16/cyclin-dependent kinase inhibitor 2A (CDKN2A) gene located on chromosomal region 9p21 frequently is altered in several types of cancer. MATERIALS AND METHODS: To investigate both the presence of numerical abnormalities of chromosome 9 and p16 gene alterations in ovarian cancer, we studied 28 cases by the fluorescence in situ hybridization (FISH) technique using a DNA p16 probe and an a-satellite probe specific for chromosome 9. RESULTS: Numerical abnormalities of chromosome 9 were found in all studied cases. Polysomy 9 was detected in 10 cases while monosomy 9 in seven cases. In 11 cases, there were two cell populations, one with polysomy 9 and the other with monosomy 9. In all cases, the p16 gene deletion was observed. Among them, 25 cases presented deletion of p16 gene in 21.43%-86.3% of the examined cells. Three cases carried deletion of the p16 gene in a lower proportion (12.04%-19.49%). In five cases with p16 gene deletion, homozygous deletion was detected. CONCLUSION: Numerical aberrations of chromosome 9 and p16 gene deletion are common findings in ovarian cancer. Data suggest that the p16 gene, located in the short arms of chromosome 9, may play a role in ovarian carcinogenesis. In addition, polysomy 9 could lead to activation of a number of oncogenes, thus participating in the neoplastic process in the ovaries. FAU - Aravidis, Christos AU - Aravidis C AD - Department of Cancer Genetics, Centrum for Molecular Medicine, Karolinska University Hospital, L8:02 Stockholm171 76, Sweden. christos.aravidis@yahoo.gr FAU - Panani, Anna D AU - Panani AD FAU - Kosmaidou, Zoi AU - Kosmaidou Z FAU - Thomakos, Nikolaos AU - Thomakos N FAU - Rodolakis, Alexandros AU - Rodolakis A FAU - Antsaklis, Aristeidis AU - Antsaklis A LA - eng PT - Journal Article PL - Greece TA - Anticancer Res JT - Anticancer research JID - 8102988 SB - IM MH - Aged MH - Aged, 80 and over MH - Cell Transformation, Neoplastic/genetics MH - *Chromosome Aberrations MH - *Chromosomes, Human, Pair 9 MH - Female MH - *Gene Deletion MH - *Genes, p16 MH - Humans MH - In Situ Hybridization, Fluorescence MH - Middle Aged MH - Ovarian Neoplasms/*genetics EDAT- 2012/12/12 06:00 MHDA- 2013/05/03 06:00 CRDT- 2012/12/11 06:00 PHST- 2012/12/11 06:00 [entrez] PHST- 2012/12/12 06:00 [pubmed] PHST- 2013/05/03 06:00 [medline] AID - 32/12/5309 [pii] PST - ppublish SO - Anticancer Res. 2012 Dec;32(12):5309-13.