Abstract
Hyperhomocysteinaemia is an independent risk factor for arteriosclerosis, recurrent thromboembolic complications and osteoporosis. After menopause, a high level of total homocysteine seems to be secondary to the altered hormonal status. Hormone replacement therapy (HRT) limits the development of coronary artery disease through a variety of mechanisms. One such mechanism is through affecting homocysteine metabolism. Folate and vitamin B12 deficiencies are considered to be major risks for hyperhomocysteinaemia. This study, therefore, was undertaken to examine whether lowering homocysteine with HRT or folic acid in ovariectomized rats could attenuate cardiovascular complications. Sixty sexually mature female Wistar rats were ovariectomized. Three weeks later, they were treated with estradiol (15 microg kg(-1), every two weeks, i.m.) or folic acid (90 microg daily, orally), either alone or in a combined form for four weeks. In addition, groups of ovariectomized rats (positive control) and healthy rats (negative control) were given cottonseed oil. Blood samples were then collected for serum and plasma separation. Serum total homocysteine, folate, estradiol, plasma nitric oxide (NO), lipid profile, and susceptibility of non-high-dens...Continue Reading
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