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Abstract Title:

Breast safety and efficacy of genistein aglycone for postmenopausal bone loss: a follow-up study.

Abstract Source:

J Clin Endocrinol Metab. 2008 Dec;93(12):4787-96. Epub 2008 Sep 16. PMID: 18796517

Abstract Author(s):

Herbert Marini, Alessandra Bitto, Domenica Altavilla, Bruce P Burnett, Francesca Polito, Vincenzo Di Stefano, Letteria Minutoli, Marco Atteritano, Robert M Levy, Rosario D'Anna, Nicola Frisina, Susanna Mazzaferro, Francesco Cancellieri, Maria Letizia Cannata, Francesco Corrado, Alessia Frisina, Vincenzo Adamo, Carla Lubrano, Carlo Sansotta, Rolando Marini, Elena Bianca Adamo, Francesco Squadrito

Abstract:

CONTEXT: Genistein aglycone improves bone metabolism in women. However, questions about the long-term safety of genistein on breast as well as its continued efficacy still remain. OBJECTIVE: We assessed the continued safety profile of genistein aglycone on breast and endometrium and its effects on bone after 3 yr of therapy. DESIGN: The parent study was a randomized, double-blind, placebo-controlled trial involving 389 osteopenic, postmenopausal women for 24-months. Subsequently, a subcohort (138 patients) continued therapy for an additional year. Patients and Interventions: Participants received 54 mg of genistein aglycone daily (n = 71) or placebo (n = 67). Both treatment arms received calcium and vitamin D(3) in therapeutic doses. MAIN OUTCOMES: Mammographic density was assessed at baseline, 24 and 36 months by visual classification scale and digitized quantification. BRCA1 and BRCA2, sister chromatid exchange, and endometrial thickness were also evaluated. Lumbar spine and femoral neck bone mineral density were also assessed. Secondary outcomes were biochemical levels of bone markers. RESULTS: After 36 months, genistein did not significantly change mammographic breast density or endometrial thickness, BRCA1 and BRCA2 expression was preserved, whereas sister chromatid exchange was reduced compared with placebo. Bone mineral density increases were greater with genistein for both femoral neck and lumbar spine compared to placebo. Genistein also significantly reduced pyridinoline, as well as serum carboxy-terminal cross-linking telopeptide and soluble receptor activator of NF-kappaB ligand while increasing bone-specific alkaline phosphatase, IGF-I, and osteoprotegerin levels. There were no differences in discomfort or adverse events between groups. CONCLUSIONS: After 3 yr of treatment, genistein exhibited a promising safety profile with positive effects on bone formation in a cohort of osteopenic, postmenopausal women.

Study Type : Human Study

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Sayer Ji
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