Fine structure of pituitary blood vessels in embryos of the dwarf (dw) mutant mouse
- 14 Downloads
Blood vessels in the pars distalis of the embryonic pituitary gland of the dwarf (dw) mutant mouse were analyzed by means of electron microscopy. Dwarf (dw/dw) embryos ranging in age from 15 through 18 days of gestation were obtained from matings of dwarf homozygotes in which reproductivity was induced by means of hormone supplementation and grafts of normal pituitary to the kidney capsule. Endothelial cells in vessels of the dwarf pituitary were retarded in development as indicated by a retention of macrovesicles and marginal flaps beyond embryonic stages when they normally subside in normal embryos, as well as a lag in the development of endothelial cell attenuations. This retardation may be causally related to the pituitary pathology involving faulty cytodifferentiation of somatotrophs and mammotrophs.
Key wordsDwarf mice Pituitary Blood vessels
Unable to display preview. Download preview PDF.
- Kurosumi K (1974) Adenohypophysis. In: An atlas of electron micrographs. Functional morphology of endocrine glands. Igaku Shoin LTD, Tokyo, 1–146Google Scholar
- Svalander C (1974) Ultrastructure of the fetal rat adenohypophysis. Acta Endocrinol (Copenh) (suppl) 188:1–113Google Scholar
- Van Buul S, Van den Brande JL (1978) The snell-dwarf mouse. I. General growth pattern, before and during growth hormone and thyroxine therapy. Acta Endocrinol (Copenh) 89:632–645Google Scholar
- Yamada K, Sano M (1960) Electron microscopic observations of the anterior pituitary of the mouse. Okajimas Folia Anat Jpn 34:449–475Google Scholar