Journal of Nutrition and Health

The Korean Nutrition Society (한국영양학회)
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Effects of Arginine Supplementation on Bone Mineral Density and Bone Markers in OVX Rats

난소절제쥐에서 Arginine 첨가 식이가 골밀도 및 골대사에 미치는 영향

  • Choi, Mi-Ja (Department of Food and Nutrition, Keimyung University)
  • Published : 2009.06.30
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Abstract

As far as we know, there were no studies of the effect of L-arginine on bone metabolism in post-menopausal women or ovariectomized rats. The primary objective of the current study was to determine whether arginine supplementation was associated with alterations in femoral and spinal bone mineral density (BMD) and bone markers in ovariectomized (Ovx) rats. Forty female Sprague-Dawley rats were divided into two groups, Ovx and sham groups, which were each randomly divided into two subgroups that were fed control and arginine supplemented diet. All rats were fed on experimental diet and deionized water ad libitum for 9 weeks. Bone formation was measured by serum osteocalcin and alkaline phosphatase (ALP) concentrations. Bone resorption was measured by deoxypyridinoline (DPD) crosslinks immunoassay and corrected for creatinine. Serum osteocalcin, growth hormone, insulin-like growth factor-1 (IGF-1), parathyroid hormone (PTH) and calcitonin were analyzed using radioimmunoassay kits. Bone mineral density (BMD) and bone mineral content (BMC) were measured using PIXImus (GE Lunar Co, Wisconsin, USA) in spine and femur. The serum and urine concentrations of Ca and P were determined. The plasma was analyzed for arginine. Diet did not affect weight gain, mean food intake, and plasma arginine concentration. Urinary Ca excretion was decreased by arginine supplementation in Ovx rats, but statistically not significant. The Ovx rats fed arginine-supplemented diet were not significantly different in ALP, osteocalcin, crosslinks value, PTH, calcitonin and IGF-1 compared to those fed control diet. The arginine-supplemented group had significantly higher serum Ca and growth hormone than control group. Spine and femur BMD were significantly increased by arginine supplementation on 5th and 9th weeks after feeding. Our findings indicate that dietary L-arginine supplementation decreased bone mineral density loss in Ovx rats. Therefore, dietary arginine supplementation may represent a potentially useful strategy for the management of osteoporosis.

Keywords

References

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