Favorable modulation of benign breast tissue and serum risk biomarkers is associated with >10 % weight loss in postmenopausal women

Carol J. Fabian, Bruce F. Kimler, Joseph E. Donnelly, Debra K. Sullivan, Jennifer R. Klemp, Brian K. Petroff, Teresa A. Phillips, Trina Metheny, Sonya Aversman, Hung Wen Yeh, Carola M. Zalles, Gordon B. Mills, Stephen D. Hursting

    Research output: Contribution to journalArticlepeer-review

    35 Scopus citations

    Abstract

    We conducted a phase II feasibility study of a 6-month behavioral weight loss intervention in postmenopausal overweight and obese women at increased risk for breast cancer and the effects of weight loss on anthropomorphic, blood, and benign breast tissue biomarkers. 67 women were screened by random peri-areolar fine-needle aspiration, 27 were registered and 24 participated in the interventional phase. The 24 biomarker evaluable women had a median baseline BMI of 34.2 kg/m2 and lost a median of 11 % of their initial weight. Significant tissue biomarker modulation after the 6-month intervention was noted for Ki-67 (if restricted to the 15 women with any Ki-67 at baseline, p = 0.041), adiponectin to leptin ratio (p = 0.003); and cyclin B1 (p = 0.001), phosphorylated retinoblastoma (p = 0.005), and ribosomal S6 (p = 0.004) proteins. Favorable modulation for serum markers was observed for sex hormone-binding globulin (p < 0.001), bioavailable estradiol (p < 0.001), bioavailable testosterone (p = 0.033), insulin (p = 0.018), adiponectin (p = 0.001), leptin (p < 0.001), the adiponectin to leptin ratio (p < 0.001), C-reactive protein (p = 0.002), and hepatocyte growth factor (p = 0.011). When subdivided by <10 or >10 % weight loss, change in percent total body and android (visceral) fat, physical activity, and the majority of the serum and tissue biomarkers were significantly modulated only for women with >10 % weight loss from baseline. Some factors such as serum PAI-1 and breast tissue pS2 (estrogen-inducible gene) mRNA were not significantly modulated overall but were when considering only those with >10 % weight loss. In conclusion, a median weight loss of 11 % over 6 months resulted in favorable modulation of a number of anthropomorphic, breast tissue and serum risk and mechanistic markers. Weight loss of 10 % or more should likely be the goal for breast cancer risk reduction studies in obese women.

    Original languageEnglish (US)
    Pages (from-to)119-132
    Number of pages14
    JournalBreast Cancer Research and Treatment
    Volume142
    Issue number1
    DOIs
    StatePublished - Nov 2013

    Keywords

    • Breast risk biomarkers with weight loss
    • Energy balance
    • RPFNA

    ASJC Scopus subject areas

    • Oncology
    • Cancer Research

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