91 Original Article Effect of methanolic soy extract on serum levels of lipid and lipoproteins in ovariectomized rats Nasirzadeh MR 1* , Khayat-Nouri MH 1 , NourazarAR 1 , Rahmani J 2 1- Department of Basic Sciences, Faculty of Veterinary Medicine, Islamic Azad University, Tabriz Branch, Tabriz, I. R. Iran. 2- Department of Clinical Sciences, Faculty of Veterinary Medicine, Islamic Azad university, Tabriz Branch, Tabriz, I. R. Iran. Received June 27, 2010; Accepted October 30, 2010 Abstract: Background: Disorders in lipid metabolism and increases of serum lipid and lipoprotein levels have been associated with postmenopausal complications. Some studies have demonstrated that isoflavones and soy proteins could have useful effects on serum lipid and lipoprotein levels; however, there are a few reports about the effects of total soy extract on serum lipid and lipoproteins. This study was carried out to evaluate the effect of methanolic soy extract on serum levels of lipid and lipoproteins in ovariectomized rat. Materials and Methods: In this study 40 female rats were allocated randomly into 4 equal groups: 1) sham; 2) ovariectomized; 3) treatment and 4) control-gavage. The animals in treatment group received 60 mg/kg soy extract in drinking water using gavage for 28 days. At the end of the treatment, serum concentrations of total cholesterol, triglyceride, LDL, HDL and VLDL were determined. Results: Results showed that administration of total soy extract can improve the serum concentrations of lipid and lipoproteins in treatment group. Moreover, the study revealed a significant difference between the sham group and the other groups in serum concentrations of VLDL and triglyceride (P<0.05). Conclusion: Soy extract administration can have a positive effect on serum lipid and lipoprotein levels in ovariectomized rats. Keywords: Lipid profile, Methanolic soy extract, Ovariectomy, Rat * Corresponding Author. Email: mr.nasirzadeh@iaut.ac.ir Tel: 0098 914 101 5108 Fax: 0098 411 637 3935 Conflict of Interests: No Feyz, Journal of Kashan University of Medical Sciences, Summer, 2011; Vol. 15, No 2, Pages 91-97 Please cite this article as: Nasirzadeh MR, Khayat Nouri MH, NourazarAR, Rahmani J. Effect of methanolic soy extract on serum levels of lipid and lipoproteins in ovariectomized rats. Feyz 2011; 15(2): 91-7. Downloaded from feyz.kaums.ac.ir at 22:43 +0330 on Thursday December 2nd 2021