Effect of Gengnianchun Recipe (更年春方) on Bone Mineral Density, Bone Biomechanical Parameters and Serum Lipid Level in Ovariectomized Rats

摘要

Objective: To observe the effect of Gengnianchun Recipe (更年春方, GNC) on bone mineral density (BMD), bone biomechanical parameters and serum lipid level in the bilaterally ovariectomized (OVX) rats and to explore the prophylactic and therapeutic action of GNC on ovariectomy induced osteoporosis and hyperlipidemia. Methods: OVX SD rats, 10-12 months old, were divided into different groups and fed with GNC 2 g/d, GNC 1 g/d and Nilestriol 0.125 mg/week, respectively for 4 months to observe the change of BMD and bone biomechanical parameters of the lumbar vertebrae, and the serum levels of total cholesterol (TC), triglyceride(TG), high-density lipoprotein cholesterol (HDL-C) and low-density lipoprotein cholesterol (LDL-C), and to compare the effect of the two drugs on the morphology of the uterus. Results: There was marked reduction in BMD and biomechanical parameters in lumbar vertebrae ( P< 0.01) and increase of serum TC and LDL-C levels ( P< 0.01) in rats after OVX. GNC or Nilestriol significantly improved the decreased BMD and biomechanical parameters of the lumbar vertebrae ( P< 0.05 or P< 0.01), and reduced the serum TC and LDL-C levels ( P< 0.01). In the Nilestriol group, the wet weight of uterus got increased obviously ( P< 0.01), the number of uterine glands increased, uterine columnar epithelium thickened, and the mitotic figures in the epithelial stroma and myointimal cells augmented. But no such effect in wet weight and morphology of uterus was found in the GNC group. Conclusion: GNC could increase the BMD and biomechanical parameters of the lumbar vertebrae, reduce the serum TC and LDL-C levels, yet produce no adverse reaction in stimulating proliferation and hypertrophy of uterus.