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Invasive prolactinomas are more likely to be resistant to drug therapy but the mechanism of this is still unknown. The objective of this study was to analyze the different expression of ERmRNA and D2RmRNA isoforms in prolactinomas responsive and resistant to dopamine agonist (DA), and to discuss the correlation of such gene expression with tumor biological behavior. A prospective study of 20 consecutive...
Objective Estradiol (E2) acts to modulate the ratio of two dopamine D2 receptor isoforms (D2L/D2S) by the nuclear estrogen receptor (ER) and to reduce dopamine’s inhibitory action on PRL secretion. Here we demonstrate the correlation between the expression of ER mRNA and D2R mRNA isoforms in pituitary neoplasms cells. Methods Twenty-four human pituitary adenomas (14 prolactinomas and 10 gonadotrope...
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