Osteoporosis International

, Volume 22, Issue 2, pp 703–709

Study of the mechanisms by which Sambucus williamsii HANCE extract exert protective effects against ovariectomy-induced osteoporosis in vivo

  • Y. Zhang
  • Q. Li
  • H.-Y. Wan
  • H.-H. Xiao
  • W.-P. Lai
  • X.-S. Yao
  • M.-S. Wong
Original Article

DOI: 10.1007/s00198-010-1240-3

Cite this article as:
Zhang, Y., Li, Q., Wan, H. et al. Osteoporos Int (2011) 22: 703. doi:10.1007/s00198-010-1240-3

Abstract

Summary

The purpose of this study is to investigate the dose-dependent effects of SWH on bone properties and the mechanism involved in mediating the osteoprotective actions of SWH. The results indicated that SWH could improve bone properties by inhibiting the process of bone resorption and stimulating the process of bone formation.

Introduction

Our previous study showed that Sambucus williamsii HANCE (SWH) improved trabecular bone mass and cortical bone strength in ovariectomized (OVX) rats. The purpose of this study is to investigate the dose-dependent effects of SWH on bone properties and the mechanism involved in mediating the osteoprotective actions of SWH.

Methods

Three-month-old C57BL/6J mice were fed a phytoestrogen-free diet and subjected to either ovariectomy or sham operation. OVX mice were treated with genistein (50 mg/kg), or a low (200 mg/kg), medium (500 mg/kg), or high (1,000 mg/kg) dose of SWH extract.

Results

SWH could dose-dependently decrease urinary Ca excretion and increase serum Ca level in OVX mice. It could increase tibial bone mineral density and exert beneficial effects on the microarchitecture of trabecular bone in the OVX mice. SWH suppressed the ovariectomy-induced expression of Cbfa1 mRNA and cathepsin K mRNA and enhanced the ratio of OPG/RANKL mRNA expression in the tibia. In vitro study showed that SWH dramatically reduced the number of TRAP-positive cells in RANKL-induced RAW 264.7 cells.

Conclusions

The present study indicated that SWH could improve bone properties by inhibiting the process of bone resorption and stimulating the process of bone formation.

Keywords

Bone gene expressionBone propertiesOsteoporosisPhytoestrogenSambucus williamsii HANCE

Copyright information

© International Osteoporosis Foundation and National Osteoporosis Foundation 2010

Authors and Affiliations

  • Y. Zhang
    • 1
  • Q. Li
    • 2
  • H.-Y. Wan
    • 3
  • H.-H. Xiao
    • 4
  • W.-P. Lai
    • 3
  • X.-S. Yao
    • 4
    • 5
  • M.-S. Wong
    • 2
    • 3
  1. 1.Center of System Biomedical SciencesUniversity of Shanghai for Science and TechnologyShanghaiPeople’s Republic of China
  2. 2.State Key Laboratory of Chinese Medicine and Molecular PharmacologyShenzhenPeople’s Republic of China
  3. 3.Department of Applied Biology and Chemical TechnologyThe Hong Kong Polytechnic UniversityKowloonPeople’s Republic of China
  4. 4.School of Chinese Materia MedicaShenyang Pharmaceutical UniversityShenyangPeople’s Republic of China
  5. 5.Institute of Traditional Chinese Medicine & Natural Products, College of PharmacyJinan UniversityGuangzhouPeople’s Republic of China