Long-term resveratrol consumption protects ovariectomized rats chronically treated with D-galactose from developing memory decline without effects on the uterus.
Resveratrol (Res) displays potent anti-oxidant activity and is a selective estrogen receptor modulator. The aim of the present study is to investigate whether Res consumption protects ovariectomized (OVX) rats chronically treated with D-galactose (D-gal) from developing memory decline and whether Res administration decreases pathological changes in the endometrium and lumen of the uterus compared with estradiol replacement therapy. Rats were divided into 6 groups: 1) Sham control group; 2) OVX+D-gal 100mg/kg group (OVX+D-gal); 3-5) OVX, D-gal and Res 20, 40, 80 mg/kg treated groups; and 6) OVX, D-gal and estradiol valerate 0.8 mg/kg treated group (ET). Twelve weeks later, in a Morris water maze test, the OVX+D-gal rats exhibited a significant memory impairment compared with the Sham control rats, which was accompanied by decreased total superoxide dismutase (T-SOD) and glutathione peroxidase (GSH-Px) activities and an increased thiobarbituric acid reactive substances (TBARS) level in the serum. In addition, the TBARS and protein carbonylation levels increased in the hippocampus. The beneficial roles of the 40 and 80 mg/kg Res treatments were manifested in the prevention of memory decline and markedly decreased oxidant stress indices. The disruption of the cristae in the mitochondria and the irregular nuclei and condensed chromatin in the pyramidal cells of the hippocampal CA1 region were also reduced after Res treatment. Furthermore, edema in the endometrium and lymphocyte infiltration was avoided in all three of the Res-treated groups compared with the ET group. These results suggest that Res is useful not only in protecting OVX+D-gal rats from developing memory decline by increasing the anti-oxidation but also in avoiding the effects on the uterus.
Department of Nutrition and Food Hygiene, School of Public Health, Shanxi Medical University, Taiyuan, Shanxi 030001, PR China. haifengzhaolxm@yahoo.com.cn
Haifeng
H
Zhao
Qiao
Q
Niu
Xuemin
X
Li
Tiantian
T
Liu
Yunan
Y
Xu
Hao
H
Han
Wanrong
W
Wang
Ningxiu
N
Fan
Qinqin
Q
Tian
Huifeng
H
Zhang
Zelan
Z
Wang
D000818:Animals; D000975:Antioxidants / Q000494:pharmacology*; D001835:Body Weight / Q000187:drug effects; D004435:Eating / Q000187:drug effects; D004644:Emotions / Q000187:drug effects; D004958:Estradiol / Q000097:blood; D005260:Female; D005690:Galactose / Q000494:pharmacology*; D005979:Glutathione Peroxidase / Q000378:metabolism; D006624:Hippocampus / Q000473:pathology; D018782:Maze Learning / Q000187:drug effects; D008568:Memory / Q000187:drug effects; D008569:Memory Disorders / Q000139:chemically induced / Q000517:prevention & control*; D009043:Motor Activity / Q000187:drug effects; D009474:Neurons / Q000473:pathology; D010052:Ovariectomy / Q000523:psychology*; D010084:Oxidation-Reduction; D050050:Protein Carbonylation / Q000187:drug effects; D051381:Rats; D017208:Rats, Wistar; D000077185:Resveratrol; D013267:Stilbenes / Q000494:pharmacology*; D013482:Superoxide Dismutase / Q000378:metabolism; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism; D014599:Uterus / Q000187:drug effects*
D000975:Antioxidants; D013267:Stilbenes; D017392:Thiobarbituric Acid Reactive Substances; D004958:Estradiol; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D000077185:Resveratrol; D005690:Galactose