Effect of estradiol 17-beta on LH subunits and prolactin mRNAs expression in the pituitary of old female rats.
: OBJECTIVES: The aim of the study was to examine susceptibility of the pituitary gland to estrogenic impulse in old, noncycling rats by measurement of steady state level of mRNAs encoding LH subunits a and b and mRNA for PRL. METHODS: 22-month-old rats were ovariectomized and after one week they were subcutaneously implanted with silas.....