${session.getAttribute("locale")} 5 The mRNA levels of GtH Iβ, GtH IIβ and GH in relation to testicular development and testosterone treatment in pituitary cells of male tilapia Tue 16 Oct 2018 11:48:25 AEST ]]> Reproductive development of male and female tilapia hybrids (Oreochromis niloticus × O. aureus) and changes in mRNA levels of gonadotropin (GtH) I and II subunits 10 nM, or E2 at >1 nM) was followed by a decrease in the steady-state levels of the I transcript, while those of II were left unaltered. In situ hybridization studies revealed that in pituitaries of both sexes, the cells producing each of these mRNAs are located in a distinct location. These results suggest that gonadal steroids may exert differential feedback mechanisms at the level of the pituitary to control transcription of each GtH subunit in distinct cell types specific for each hormone.]]> Tue 16 Oct 2018 11:47:33 AEST ]]>