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Phytomedicine. 2014 Oct 15;21(12):1498-503. doi: 10.1016/j.phymed.2014.06.019. Epub 2014 Aug 28.

Pueraria mirifica extract and puerarin enhance proliferation and expression of alkaline phosphatase and type I collagen in primary baboon osteoblasts.

Author information

1
Biological Sciences Program, Faculty of Science, Chulalongkorn University, Bangkok, Thailand; Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand.
2
Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand. Electronic address: Suchinda.M@chula.ac.th.
3
Department of Physiology, Faculty of Science, Mahidol University, Bangkok, Thailand; Center of Calcium and Bone Research (COCAB), Faculty of Science, Mahidol University, Bangkok, Thailand.
4
Southwest National Primate Research Center and Department of Genetics, Texas Biomedical Research Institute, San Antonio, TX 78245, USA.

Abstract

Phytoestrogen-rich Pueraria mirifica (PM) tuberous extract is a promising candidate for the development of anti-osteoporosis drugs for postmenopausal women, but its action has never been validated in humans or in non-human primates, which are more closely related to humans than rodents. In vitro study of non-human primate osteoblasts is thus fundamental to prepare for in vivo studies of phytoestrogen effects on primate bone. This study aimed to establish a culture system of baboon primary osteoblasts and to investigate the effects of PM extract and its phytoestrogens on these cells. Primary osteoblasts from adult baboon fibulae exhibited osteoblast characteristics in regard to proliferation, differentiation, mineralization, and estrogen receptor expression. They responded to 17β-estradiol by increased proliferation rate and mRNA levels of alkaline phosphatase (ALP), type I collagen, and osteocalcin. After being exposed for 48 h to 100 μg/ml PM extract, 1000 nM genistein, or 1000 nM puerarin, primary baboon osteoblasts markedly increased the rate of proliferation and mRNA levels of ALP and type I collagen without changes in Runx2, osterix, or osteocalcin expression. PM extract, genistein, and puerarin also decreased the RANKL/OPG ratio, suggesting that they could decrease osteoclast-mediated bone resorption. However, neither PM extract nor its phytoestrogens altered calcium deposition in osteoblast culture. In conclusion, we have established baboon primary osteoblast culture, which is a new tool for bone research and drug discovery. Furthermore, the present results provide substantial support for the potential of PM extract and its phytoestrogens to be developed as therapeutic agents against bone fragility.

KEYWORDS:

Baboon; Genistein; Osteoblasts; Osteoporosis; Pueraria mirifica; Puerarin

PMID:
25442257
PMCID:
PMC4679364
DOI:
10.1016/j.phymed.2014.06.019
[Indexed for MEDLINE]
Free PMC Article

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