Abstract
Resistin is involved in the inflammatory response, as well as in insulin resistance. In rodents, resistin levels are partially regulated by ovarian hormones. Thus, ovariectomy-induced changes in resistin levels and their response to lipopolysaccharide (LPS)-induced septic stress were evaluated. Ovariectomized (OVX) rats exhibited higher serum resistin concentrations and visceral and subcutaneous white adipose tissue (WAT) resistin mRNA levels than sham-operated (sham) rats under the saline-injected (basal) conditions. The serum resistin levels of the gonadal intact male rats were higher than those of the sham rats, whereas the serum resistin levels of the male and OVX rats did not differ. In both the sham and OVX rats, the serum resistin concentration and the resistin mRNA levels of WAT were increased by LPS injection. At 24 h after the LPS injection, no difference was detected in the serum resistin concentrations or WAT mRNA resistin levels between the sham and OVX rats. These results suggest that ovarian hormones partially regulate the basal resistin levels of female rats.
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