Immunocytochemical effects of thyroxine stimulation on the adenohypophysis of dwarf (dw) mutant mice.
The effects of dietary thyroxine on the immunoreactivity of cells in the pars distalis of the adenohypophysis in dwarf (dw/dw) mice were determined by ultrastructural immunocytochemistry. In nontreated dwarfs only adrenocorticotropic hormone (ACTH) cells and luteinizing hormone (LH) cells showed positive reactions to their respective antibodies, whereas no cells showed immunoreactivity to antibodies to growth hormone (GH), thyroid-stimulating hormone (TSH), or prolactin (Prl). In dwarfs supplemented postnatally with dietary thyroxine for 9 wks, the treatment failed to produce immunoreactive GH, TSH or Prl cells. However, LH cells became more prominent and fully developed, with denser concentrations of immunoreactive particles overlying the secretory granules than occurred in nontreated dwarfs. In thyroxine-treated dwarfs, ACTH cells were similar in ultrastructural features and immunoreactivity to those in nontreated dwarfs.
Wilson
D B
DB
Division of Anatomy, School of Medicine, University of California, San Diego, La Jolla 92093.
Wyatt
D P
DP
D000324:Adrenocorticotropic Hormone / Q000032:analysis; D000818:Animals; D006063:Chorionic Gonadotropin / Q000032:analysis; D003433:Crosses, Genetic; D004393:Dwarfism, Pituitary / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D005640:Follicle Stimulating Hormone / Q000032:analysis; D013006:Growth Hormone / Q000032:analysis; D007150:Immunohistochemistry; D007986:Luteinizing Hormone / Q000032:analysis; D008297:Male; D051379:Mice; D008817:Mice, Mutant Strains; D016253:Microscopy, Immunoelectron; D010903:Pituitary Gland, Anterior / Q000737:chemistry / Q000166:cytology / Q000187:drug effects* / Q000648:ultrastructure; D011388:Prolactin / Q000032:analysis; D013972:Thyrotropin / Q000032:analysis; D013974:Thyroxine / Q000494:pharmacology*
D006063:Chorionic Gonadotropin; D000324:Adrenocorticotropic Hormone; D011388:Prolactin; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D013972:Thyrotropin; D013006:Growth Hormone; D013974:Thyroxine