Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/94233
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Type: Journal article
Title: Potential effects of phytoestrogen genistein in modulating acute methotrexate chemotherapy-induced osteoclastogenesis and bone damage in rats
Author: King, T.
Shandala, T.
Lee, A.
Foster, B.
Chen, K.
Howe, P.
Xian, C.
Citation: International Journal of Molecular Sciences, 2015; 16(8):18293-18311
Publisher: MDPI AG
Issue Date: 2015
ISSN: 1661-6596
1422-0067
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Responsibility: 
Tristan J. King, Tetyana Shandala, Alice M. Lee, Bruce K. Foster, Ke-Ming Chen, Peter R. Howe, and Cory J. Xian
Abstract: Chemotherapy-induced bone damage is a frequent side effect which causes diminished bone mineral density and fracture in childhood cancer sufferers and survivors. The intensified use of anti-metabolite methotrexate (MTX) and other cytotoxic drugs has led to the need for a mechanistic understanding of chemotherapy-induced bone loss and for the development of protective treatments. Using a young rat MTX-induced bone loss model, we investigated potential bone protective effects of phytoestrogen genistein. Oral gavages of genistein (20 mg/kg) were administered daily, for seven days before, five days during, and three days after five once-daily injections (sc) of MTX (0.75 mg/kg). MTX treatment reduced body weight gain and tibial metaphyseal trabecular bone volume (p < 0.001), increased osteoclast density on the trabecular bone surface (p < 0.05), and increased the bone marrow adipocyte number in lower metaphyseal bone (p < 0.001). Genistein supplementation preserved body weight gain (p < 0.05) and inhibited ex vivo osteoclast formation of bone marrow cells from MTX-treated rats (p < 0.001). However, MTX-induced changes in bone volume, trabecular architecture, metaphyseal mRNA expression of pro-osteoclastogenic cytokines, and marrow adiposity were not significantly affected by the co-administration of genistein. This study suggests that genistein may suppress MTX-induced osteoclastogenesis; however, further studies are required to examine its potential in protecting against MTX chemotherapy-induced bone damage.
Keywords: Methotrexate; chemotherapy; osteoporosis; genistein
Rights: © 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
DOI: 10.3390/ijms160818293
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