in addition , preincubation with triiodothyronine significantly inhibited thyrotrophin-releasing hormone-induced inositol phospholipid turnover in dispersed pituitary cells indicating that in this tumour , circulating thyroid hormones were exerting feedback inhibition at the level of the pituitary either by reducing the number of thyrotrophin-releasing hormone receptors and/or their coupling to second messenger pathways .
C0040162
thyrotrophin-releasing hormone
C0032002
pituitary