Ultrastructure of the nongranulated cells and morphology of the extracellular spaces in the pars distalis of adult and pouch-young tammar wallabies (Macropus eugenii)

Cell and Tissue Research
J F Leatherland, Marilyn B Renfree


Differentiated nongranulated (folliculo-stellate) cells were observed in the centre and periphery of the cords of cells in the pars distalis of the adult tammar wallaby (Macropus eugenii). The nongranulated cells formed follicles containing a small lumen: the cell apices were joined by junctional complexes including zonulae adhaerentes and maculae adhaerentes (desmosomes). Follicles of granulated cells were also occasionally found. Follicles were rarely observed in the adult, but were numerous and generally larger in pouch-young wallabies. Moreover, whereas the involvement of granulated cells in the follicles of the adult was infrequent, they were common components of follicular structures in the pouch-young. The marginal cells at the periphery of the pars distalis in contact with the hypophysial cleft had many of the cytological characteristics of the nongranulated cells in the central pars distalis. In both adult and pouch-young wallabies, nongranulated cells at the periphery of the cell cords were juxtaposed such that they formed "sinusoid-like" spaces or lacunae, presumably as part of the extravascular channel system. The observations are discussed in light of the proposed phagocytotic, metabolite and/or hormone transport a...Continue Reading


Oct 6, 1978·Cell and Tissue Research·M J Alluchon-Gérard
Jan 1, 1972·Zeitschrift für Zellforschung und mikroskopische Anatomie·K Yamashita
Feb 23, 1973·Zeitschrift für Zellforschung und mikroskopische Anatomie·A K PearsonD Zambrano
Jan 1, 1972·Zeitschrift für Zellforschung und mikroskopische Anatomie·K P Dingemans, C A Feltkamp
Dec 1, 1969·The American Journal of Anatomy·J Schechter
Dec 30, 1965·Zeitschrift für Zellforschung und mikroskopische Anatomie·M Weiss
Jan 1, 1980·Cell and Tissue Research·E K PerrymanJ T Bagnara
Sep 10, 1981·Nature·Marilyn B Renfree


Jan 1, 1983·Cell and Tissue Research·J F Leatherland, Marilyn B Renfree
Jan 1, 1988·Anatomy and Embryology·H IkedaH Niizuma
Nov 26, 2008·Molecular and Cellular Endocrinology·Brandon R MenziesMarilyn B Renfree
Dec 1, 1991·Endocrine Pathology·Fernando MarinKalman Kovacs
Jan 1, 1987·Virchows Archiv. A, Pathological Anatomy and Histopathology·G Gon

Related Concepts

Related Feeds

Adult Stem Cells

Adult stem cells reside in unique niches that provide vital cues for their survival, self-renewal, and differentiation. They hold great promise for use in tissue repair and regeneration as a novel therapeutic strategies. Here is the latest research.