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http://dx.doi.org/10.3746/jkfn.2014.43.1.024

Effects of Lycii Fructus and Lycii Folium Extracts on Osteoporosis in Ovariectomized Rats  

Kim, Jin-Ho (Dept. of Anatomy, College of Korean Medicine, Dongshin University)
Kim, Jeong-Sang (Dept. of Anatomy, College of Korean Medicine, Dongshin University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.43, no.1, 2014 , pp. 24-29 More about this Journal
Abstract
The effects of Lycii fructus and Lycii folium on osteoporosis and serum cholesterol levels were tested in ovariectomized (OVX) rats. Twenty-four female Sprague-Dawley rats were divided into four groups: Sham group (sham-operated), Control group (OVX, ovariectomized model), LCF group (Ovx+Lycii fructus extract), and LCL group (OVX+Lycium folium extract). After 8 weeks, the OVX ($330{\pm}5.39$ g), LCF ($315{\pm}2.99$ g), and LCL ($318{\pm}2.06$ g) groups showed increased body weight compared with sham group ($281{\pm}1.71$ g). The levels of serum osteocalcin (OC) also increased in the LCF ($444.6{\pm}26.9$ ng/mL) and LCL ($407{\pm}18.9$ ng/mL) groups compared with the OVX group ($107{\pm}3.52$ ng/mL). The activities of serum alkaline phosphatase (ALP) increased in the LCF ($108{\pm}2.7$ U/L) and LCL ($407{\pm}18.9$ ng/mL) groups compared with the OVX group ($95{\pm}2.9$ U/L). Stereomicroscopy found that the low bone density that developed in the OVX group was significantly reversed in the LCF and LCL groups after 8 weeks. We also obtained molecular-based in vivo evidence that supports a mechanism of action involving novel estrogen receptor ($ER{\alpha}$) modulator in the uterus. We found that expression of ER${\alpha}$ mRNA in the OVX rat uterus was elevated by Lycium chinense. These results suggest that Lycii fructus and Lycii folium administered to rats during 8 weeks after oophorectomy may partially recover postmenopausal osteoporosis or delay the progression of osteoporotic changes.
Keywords
Lycium chinense; ovariectomized rat; estrogen receptor; osteoporosis;
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