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Lipids

, Volume 45, Issue 4, pp 337–344 | Cite as

Exercise and Zoledronic Acid on Lipid Profile and Bone Remodeling in Ovariectomized Rats: a Paradoxical Negative Association?

  • E. Lespessailles
  • C. Jaffré
  • G. Y. RochefortEmail author
  • E. Dolléans
  • C. L. Benhamou
  • D. Courteix
Original Article

Abstract

Exercise (EXE) and amino-bisphosphonates (BP) are both considered as useful strategies in the prevention of post-menopausal bone loss. Exercise reduces lipid levels, and BP may induce increase in high-density lipoprotein cholesterol (HDL-C). We hypothesized that combined effects of BP and exercise would produce a better improvement of lipid profile. We studied the specific and combined effects of zoledronic acid (Z) and EXE on lipid profile and bone remodeling in mature ovariectomized (OVX) rats. Six-month old female rats were randomly assigned to either a sham-ovx group (n = 12) or one of four OVX groups (n = 12): vehicle-treated sedentary (OVX); OVX + EXE (OVX-E, running on a treadmill for 12 weeks); OVX + Z (20 μg/kg, i.v.), (OVX-Z); OVX + Z+EXE (OVX-ZE). Total cholesterol (TC), HDL-C and bone remodeling markers were measured at baseline and at the end of the study. We demonstrated that both Z and EXE prevented the increase in bone resorption resulting from OVX, and individually improved the atherosclerotic risk index. Therapy with Z resulted in significant increase (39.00 ± 0.03 vs. 53.6 ± 0.01 mg/dl; +37.4%, P < 0.05) in serum concentration of HDL-C and a non significant decrease in TC (135.30 ± 0.03 vs. 144.80 ± 0.05 mg/dl; −5.8%) in the OVX-Z group compared to the OVX group. Post-menopausal women have elevated risk of CVD and bone resorption, hence, these data ultimately demonstrate (except for the elevated ratio in the combined group) that exercise and zoledronic acid are useful in minimizing the impact of these two processes in women and the combination of the two may be clinically relevant.

Keywords

Lipid metabolism Atherosclerosis 

Abbreviations

BP

Amino-bisphosphonates

BW

Body weight

CTx

C terminal collagen cross-links

EXE

Exercise

FM

Fat mass

FPPS

Farnesyl pyrophosphate synthetase

HDL-C

High-density lipoprotein cholesterol

HRT

Hormonal-replacement therapy

LBM

Lean body mass

LDL-C

Low-density lipoprotein cholesterol

OC

Osteocalcin

OVX

Ovariectomy/ovariectomized

OVX-E

Ovariectomized + Exercise trained animal

OVX-Z

Ovariectomized + Zoledronic acid treated animal

OVX-ZE

Ovariectomized + Zoledronic acid treated + Exercise trained animal

PTH

Parathyroid hormone

SH

Sham-operated animal

TC

Total cholesterol

TC

Total serum cholesterol

TNF-α

Tumor necrosis factor alpha

UI

Uncoupling index

WB

Whole body

WBBMC

Whole body bone mineral content

WBBMD

Whole body bone mineral density

Z

Zoledronic acid

Notes

Acknowledgments

E. Lespessailles was the recipient of a fellowship research grant from Novartis.

Conflict of interest statement

The authors declare that there is no conflict of interest that could be perceived as prejudicing the impartiality of the research reported.

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Copyright information

© AOCS 2010

Authors and Affiliations

  • E. Lespessailles
    • 1
  • C. Jaffré
    • 1
  • G. Y. Rochefort
    • 1
    Email author
  • E. Dolléans
    • 1
  • C. L. Benhamou
    • 1
  • D. Courteix
    • 1
  1. 1.UMR-S658 INSERM, CHR ORLEANS Porte MadeleineOrleans Cedex 1France

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