Interphase molecular cytogenetic analysis of epithelial ovarian carcinomas

D. L. Persons, L. C. Hartmann, J. F. Herath, T. J. Borell, William Arthur Cliby, Gary Keeney, Robert Brian Jenkins

Research output: Contribution to journalArticle

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Abstract

Karyotype information on ovarian carcinomas has been limited because the tumors are often difficult to culture and the resultant metaphases can have complex numerical and structural chromosomal anomalies. Fluorescent in situ hybridization is a rapid method of determining centromere copy number in metaphase cells and interphase nuclei. Fluorescent in situ hybridization was used to determine the numerical centromere complement of chromosomes X, 8, 12, and 17 and HER-2/neu gene amplification within interphase nuclei of 25 primary epithelial ovarian carcinomas. Touch preparations of the carcinomas were hybridized with two-color combinations of directly labeled α-satellite centromeric chromosome enumeration probes and a directly labeled HER-2/neu probe. Modal centromere copy numbers for each of the four chromosomes were used to determine numerical abnormalities relative to the flow cytometric DNA ploidy level for each tumor. Four cases were found to be normal with respect to the four chromosomes studied. In the remaining 21 cases a relative loss of chromosomes 17 (16 cases) and X (nine cases) and a relative gain of chromosomes 12 (10 cases) and 8 (nine cases) were the most common findings. In addition, the HER-2/neu gene was amplified in two of the 25 tumors. In conclusion, fluorescent in situ hybridization is an excellent method for rapid determination of numerical abnormalities and gene amplification in ovarian carcinomas.

Original languageEnglish (US)
Pages (from-to)733-741
Number of pages9
JournalAmerican Journal of Pathology
Volume142
Issue number3
StatePublished - 1993

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