Methylation of the insulin-like growth factor binding protein-3 gene and prognosis of epithelial ovarian cancer.

Authors: Wiley, A  Katsaros, D  Fracchioli, S  Yu, H 
Citation: Wiley A, etal., Int J Gynecol Cancer. 2006 Jan-Feb;16(1):210-8.
Pubmed: (View Article at PubMed) PMID:16445635
DOI: Full-text: DOI:10.1111/j.1525-1438.2006.00299.x

Insulin-like growth factor binding protein-3 (IGFBP-3) is a member of the IGFBP family, which regulates the mitogenic and antiapoptotic effects of insulin-like growth factors. Hypermethylation of the IGFBP-3 promoter has been found to suppress its expression. To evaluate the role of IGFBP-3 in ovarian cancer progression, we examined the survival of 235 consecutively selected epithelial ovarian cancer patients in association with IGFBP-3 promoter methylation and IGFBP-3 expression in tumor tissue. IGFBP-3 promoter methylation was analyzed using methylation-specific polymerase chain reaction. Cytosol protein was extracted and measured using a bicinchoninic acid assay; IGFBP-3 was measured by enzyme linked immunosorbent assay. Promoter methylation of the IGFBP-3 gene was detected in 44% (104/235) of patients. IGFBP-3 promoter methylation was associated with disease progression and death after adjusting for clinical and pathologic variables. The association was more evident in patients with early-stage disease: RR = 2.87 (95% CI: 0.78-10.63) for disease progression and RR = 3.94 (95% CI: 0.91-15.78) for death. Tissue levels of IGFBP-3 did not differ by methylation status but were inversely associated with disease stage and residual tumor size. These results suggest that IGFBP-3 promoter methylation may be a useful prognostic marker for disease progression and death in early-stage ovarian cancer.

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CRRD ID: 2301468
Created: 2008-10-16
Species: All species
Last Modified: 2008-10-16
Status: ACTIVE



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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.