Abstract
Clinical studies had suggested that there were sex differences in pharmacological and side effects of pioglitazone. However, there are few studies on the sex differences of peroxisome proliferator-activated receptor (PPAR) gamma expressions in rat adipose tissues. We investigated the sex differences in peroxisome proliferator-activated receptor (PPAR) gamma expressions in rat adipose tissues. Subcutaneous abdominal adipose tissues and perigonadal adipose tissues were obtained from male and female Wistar rats (12 weeks of age). Expressions of PPARgamma protein were determined by Western blot analysis with anti-PPARgamma antibody. Vaginal smear check was performed in female rats. We obtained adipose tissues from females, according to the different phases of the estrous cycle. Both PPARgamma1 and gamma2 subtypes were expressed in subcutaneous adipose tissues. Expressions of PPARgamma2 in subcutaneous adipose tissues were significantly higher in males than in females. On the other hand, expressions of PPARgamma2 in perigonadal adipose tissues were significantly higher in females than in males. Expressions of PPARgamma2 in perigonadal adipose tissues in females significantly decreased during diestrus. It can be suggested that the sex hormones might affect the expressions of PPARgamma2 in adipose tissues.
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