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Type: Journal article
Title: Genome instability is increased in lymphocytes of women with polycystic ovary syndrome and is correlated with insulin resistance
Author: Moran, L.
Noakes, M.
Clifton, P.
Norman, R.
Fenech, M.
Citation: Mutation Research-Fundamental and Molecular Mechanisms of Mutagenesis, 2008; 639(1-2):55-63
Publisher: Elsevier Science BV
Issue Date: 2008
ISSN: 1386-1964
Statement of
Lisa J. Moran, Manny Noakes, Peter M. Clifton, Robert J. Norman and Michael F. Fenech
Abstract: <h4>Background</h4>Polycystic ovary syndrome (PCOS) is associated with insulin resistance and reproductive and metabolic abnormalities. The potential genetic contributors to PCOS are unclear. We tested the hypothesis that genomic instability (chromosome malsegregation and DNA damage) is increased in PCOS.<h4>Methods</h4>Overweight age, weight and BMI-matched women with (n=14) and without (n=16) PCOS (age 34.2+/-6.0 years, weight 90.7+/-14.5 kg, BMI 34.0+/-5.6 kg/m(2), mean+/-S.D.) were assessed for chromosome malsegregation (assessed by X chromosome chromogenic in situ hybridisation) and micronucleus frequency (assessed by the cytokinesis block micronucleus index) in lymphocytes.<h4>Results</h4>Women with PCOS had significantly elevated genomic instability as demonstrated by a significantly higher number of binucleated lymphocytes containing micronuclei, total number of micronuclei, a higher proportion of aneuploid X chromosome signals (2:1 X and 3:1 X) and a lower proportion of normal X chromosome segregation signals (2:2 X) in binucleated lymphocytes than women without PCOS. Surrogate measures of insulin resistance positively correlated with the proportion of aneuploid cells (2:1; 3:1 X chromosome signals) and inversely with the proportion of normal cells (2:2 X chromosome signals).<h4>Conclusion</h4>Women with PCOS display increased genomic instability (higher micronuclei and chromosome malsegregation) compared to women without PCOS and this increase may be related to the insulin resistance phenotype.
Keywords: Micronucleus index; X chromosome aneuploidy; Obesity; Polycystic ovary syndrome; Insulin resistance; Genomic instability
RMID: 0020080464
DOI: 10.1016/j.mrfmmm.2007.11.007
Appears in Collections:Obstetrics and Gynaecology publications

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