کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2780625 1153303 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Moderate weight gain does not influence bone metabolism in skeletally mature female rats
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شناسی تکاملی
پیش نمایش صفحه اول مقاله
Moderate weight gain does not influence bone metabolism in skeletally mature female rats
چکیده انگلیسی

Bone mass is correlated with body weight during growth. However, it is unclear how bone mass is influenced by weight gain following skeletal maturity. The purpose of this study was to determine the effects of weight maintenance and two rates of weight gain on bone metabolism using skeletally mature female rats. Eight-month-old female rats were fed one of 3 diets for 13 weeks: Lieber–DeCarli liquid diet ad lib (control diet), the same diet with caloric restriction to maintain initial body weight (calorie-restricted diet), and the same diet fed ad lib with the exception that appetite was enhanced (calorie-increased diet) by replacing a small quantity of maltose–dextran isolcalorically with ethanol (0.5% caloric intake). Compared to baseline, rats fed the calorie-restricted, control, and calorie-increased diets changed in weight by −1 ± 2% (mean ± SE), 10 ± 3%, and 21 ± 2%, respectively. Weight gain was associated with a significant increase in serum leptin, a putative regulator of bone formation. In contrast, significant differences in tibial bone mineral content and density were not detected among treatments groups following dietary intervention or between treatment groups and the baseline group. Similarly, indices of cancellous bone architecture (area, trabecular number, thickness, and separation) and bone turnover (mineralizing perimeter, mineral apposition rate, and bone formation rate) did not differ among groups following dietary intervention. Our findings suggest that neither weight gain nor increased serum leptin levels, over the range evaluated, influence bone metabolism in skeletally mature female rats.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bone - Volume 47, Issue 3, September 2010, Pages 631–635
نویسندگان
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