sentence: Experiments were performed in anterior pituitary cells from normal postpubertal female Sprague-Dawley rats obtained from Taconic Farm ( Germantown , NY ) , immortalized mouse α T3-1 gonadotrophs , mouse AtT20 corticotrophs , rat GH lacto-somatotrophs , as well as in mouse GnRH-secreting hypothalamic GT1-7 cells .