ABSTRACT
Objective To study whether the effects of bone mineral density by a kidney-tonifying herbal fufang treatment in senile osteoporosis mice (P6) is by the mechanism of improving the expression level of GH mRNA and IGF-1 mRNA. Methods The experimental points four groups as following:SAMR1 mice which feed saline lavage,SAMP6 divid as saline lavage group,subcutaneous injection of rhGH group and a kidney-tonifying herbal fufang treatment group. All intervention is one time everyday. After 3 months and 6 months intervention,we measure the BMD and the expression level of the GH mRNA and of IGF-1 mRNA. Results After 3 months intervention,the BMD of R1 group and the Kidney group were higher than the P6 blank group;but there is no difference in BMD between RhGH group and the P6 blank group. The effect of GH mRNA and IGF-1 mRNA expression levels:the R1 group,rhGH and kidney group were higher than the P6 blank group. After six months intervention,the BMD of the rhGH group and kidney group are higher than the P6 blank group. GH mRNA and IGF-1 mRNA expression levels:GH group and kidney group are higher than the P6 blank group. The expression level of GH mRNA and IGF-1 mRNA in four groups has positive correlation. After six months intervention ,we found the positive correlation between the expression level of GH mRNA and IGF-1 mRNA and each part of the whole body BMD. Conclusion A kidney-tonifying herbal fufang can improve the bone mineral density of P6,and its mechanism may be related to improve expression level of GH mRNA and IGF-1 mRNA.
ABSTRACT
Objective To explore the establishment methods of animal models of adult growth hormone deficiency, and to provide a good model for experimental research and treatment for abnormal bone metabolism caused by growth hor-mone deficiency.Methods The methods of establishment of animal models of adult growth hormone deficiency were re-viewed and evaluated refering to literature.Results There were three methods including spontaneous lack-of, pituitecto-mized and gene knockout can establish animal models of adult growth hormone deficiency.Conclusions Hypophysecto-mized animal models are inexpensive and easy to create, but not suitable for studying the relationship between growth hor-mone and bone metabolism.Spontaneous lack-of and gene knockout models are specific growth hormone deficiency and of great research significance in exploring the relationship between growth hormone and bone metabolism.
ABSTRACT
Objective To investigate the relationship between the serum SRC-3 levels and the bone loss severity in postmenopausal women. Methods Fifty-eight PMW with osteopenia or osteoporosis and nineteen healthy PMW were enrolled in this study from June 2012 to September 2013. BMD at the lumbar spine and femoral neck were observed by DXA Lunar Prodigy Vision. The levels of serum SRC-3 were detected by ELISA. The diagnosis value was evaluated by the ROC curves analysis. Results The levels of serum SRC-3 were significant higher in the normal group than those in the osteopenia or the osteoporosis groups (P<0.001 for both), no statistical significance was found between the osteopenia and the osteoporosis group(P=0.056). The levels of serum SRC-3 were negatively correlated with the BMD diagnosis grading (r=-0.543, P < 0.001). By using the ROC curve analysis, the serum level of SRC-3 for PMW with osteoporosis and osteopenia were found to be 0.297 ng/mL and 0.347 ng/mL, respectively. The levels of serum SRC-3 were positively associated with BMI (r=0.395, P<0.001) and LS-BMD (r=0.503,P<0.001) in the postmenopausal women. Conclusion SRC-3 might be an useful index to reflect the severity of lumbar spine bone loss.