Journal of Nutrition and Health

The Korean Nutrition Society (한국영양학회)
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Effects of Caffeine on Bone Mineral Density and Bone Mineral Content in Ovariectomized Rats

난소절제 쥐에서 카페인 첨가식이가 골밀도 및 골함량에 미치는 영향

  • Choi, Mi-Ja (Department of Food and Nutrition, Keimyung University) ;
  • Lee, Joo-Young (Department of Food and Nutrition, Keimyung University)
  • 최미자 (계명대학교 식품영양학과) ;
  • 이주영 (계명대학교 식품영양학과)
  • Published : 2008.04.30
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Abstract

The purpose of this study was to examine the effects of dietary caffeine supplementation on bone mineral density and bone mineral content in ovariectomized rats. Twenty eight female Sprague-Dawley rats (body weight $210\;{\pm}\;5\;g$) were divided into two groups, ovariectomy (OVX) and Sham groups, which were each randomly divided into two subgroups that were fed control and control supplemented with caffeine diets (caffeine 0.03% diets). All rats were fed on experimental diet and deionized water ad libitum for 6 weeks. Bone mineral density (BMD) and bone mineral content (BMC) were measured using PIXImus (GE Lunar Co, Wisconsin) in spine and femur. Serum alkaline phosphatase activity (ALP) and osteocalcin and urinary DPD crosslinks value were measured as markers of bone formation and resorption. The results of this study indicate that body weight gain and food intake were higher in OVX groups than in Sham groups regardless of diets. There were no differences weight gain between the control and caffeine groups in both OVX and Sham groups. Within the OVX groups, serum Ca concentration was lower in rats fed caffeine than in rats fed the control diet. Serum ALP, osteocalcin, urinary Ca, and phosphate were not different in each group. Spine BMD, spine BMD/weight, and spine BMC/weight, femur BMD/weight and femur BMC/weight of ovariectomy groups were significantly lower than Sham groups. Within the OVX group, there were no differences in spine BMD and BMC and femur BMD and BMC. These results indicate that no significant differences in spine and femur BMD were found due to 0.03% caffeine intakes in diet in OVX rats for 6 weeks. No negative effect of caffeine in 0.03% diet on bone mineral density were found in the present study. Further investigation of the relation between caffeine and bone mineral density are warranted. (KoreanJNutr2008; 41(3): 2l6~223)

본 연구는 0.03%의 카페인 함유 식이를 폐경모델인 난소절제쥐에서 6주간 섭취시켜 골밀도와 골무기질함량에 미치는 영향을 아래와 같이 요약하였다. 1) 체중증가량은 난소절제군이 Sham군에 비해 유의적으로 높았으며 각 군내에서 카페인 섭취에 따른 차이는 없었다. 2) 혈 중 칼슘 농도는 난소절제군내에서 카페인군이 대조군보다 유의적으로 낮게 나타났다. 3) 혈 중 ALP는 Sham군과 난소절제군 모두에서 카페인 군이 대조군보다 높은 경향을 나타내었다. 혈중 Osteocalcin은 Sham 군과 난소절제군, 그리고 각 군내에서 카페인 섭취여부에 따라 유의적인 차이를 나타내지 않았다. 4) 요 중 칼슘 및 인의 농도, 요 중 Deoxypyridinoline(DPD)와 crosslinks value는 Sham 군과 난소절제군, 그리고 각 군내에서 카페인 섭취여부에 따라 유의적인 차이를 나타내지 않았다. 5) 척추골밀도는 Sham군에 비해 난소절제군이 유의적으로 낮았고, 난소절제군내에서 카페인 첨가군과 대조군간에 차이가 없었다. 6) 대퇴골밀도와 대퇴 골무기질 함량은 Sham군과 난소 절제군 간의 차이는 없었고, 각 군내에서 식이에 따른 차이도 없었다. 따라서 카페인 0.03% caffeine 섭취는 난소절제쥐에서 6주간 섭취 시킨 경우 척추와 대퇴골밀도에 부정적 영향을 미치지 않는 것으로 나타났다.

Keywords

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