Effect of estrogen on plasma ceruloplasmin level in rats exposed to acute stress

Plasma ceruloplasmin, a copper containing protein, belongs to a class called acute phase proteins. Reduced level of ceruloplasmin was associated with Wilson's disease and Menke's kinky hair disease in man, primarily affecting copper metabolism. Stress was known to increase Ceruloplasmin. Several stress associated changes were commonly observed in women at menopause and also those who underwent overiectomy. Present experiment investigated the effect of estrogen on ceruloplasmin level in acute stress.

To assess the estradiol induced changes in plasma ceruloplasmin concentration on exposure of the rats to acute stress.

Acute stress was induced by forcing the rats to swim till exhaustion. The rats were overiectomised bilaterally to remove the primary source of sex hormones. And hormone replacement was done later.

Wistar albino female rats were used. Acute stress was induced before overiectomy, following recovery from surgery, and again after Estradiol Valerate injection (for 10 days) in same group of rats. The plasma ceruloplasmin was estimated immediately after stress during each stage--that is preoperative control, stressed control, after overiectomy and then following treatment with Estradiol Valerate.

Paired sample T test was applied to analyze the findings.

We found lowest ceruloplasmin level after stress in overiectomised animals, while on substitution of estradiol the trend appeared to be reversed.

The result suggested a direct effect of estrogen on hepatic ceruloplasmin production/release and this could account for some of the beneficial effects of hormone replacement therapy.