A scanning electron-microscopic study of "supramarginal cells" in the pituitary cleft of the rat

Cell and Tissue Research
S Correr, P M Motta

Abstract

Unusual cells lying above the marginal cellular layer of the rat pituitary cleft were studied by SEM and TEM. These cells - from their location termed supramarginal cells - have a characteristically irregular cell body from which arise a number of long and thin branched processes ending among the microvilli and cilia of the marginal cells delimiting the anterior and posterior walls of the cleft. Some supramarginal cells are star-shaped elements with thin extensions, others have a triangular or spindle-shaped body from which emerge long ameboid processes with fibril-like projections. Miniblebs, miniruffles, occasional veils and short microvilli extend over the surface of these elements. Supramarginal cells are very similar to the "Kolmer epiplexus cells" originally found on the choroid plexus or other areas of the third ventricular wall where they are known as "supraependymal cells". Present evidence suggests that supramarginal cells of pituitary cleft might have phagocytic properties and an hematogenous origin as monocytes and, as such, closely resemble Kolmer epiplexus cells of brain ventricles. Others might arise from "folliculo-stellate cells" or closely related marginal cells once they become free into the pituitary cleft. ...Continue Reading

References

Jan 1, 1978·Tissue & Cell·D R Ciocca, C B González
May 15, 1975·The Journal of Comparative Neurology·D J Allen
May 1, 1973·Antimicrobial Agents and Chemotherapy·J E CowardH S Rosenkranz
Jan 1, 1970·Zeitschrift für Zellforschung und mikroskopische Anatomie·T Vanha-Perttula, A U Arstila
Dec 31, 1973·Zeitschrift für Zellforschung und mikroskopische Anatomie·R Anwyl, L H Finlayson
Apr 1, 1973·The American Journal of Anatomy·P W Coates
Jan 1, 1973·Archivum Histologicum Japonicum = Nihon Soshikigaku Kiroku·Y Hosoya, T Fujita
Jan 1, 1972·Zeitschrift für Zellforschung und mikroskopische Anatomie·F Clementi, D Marini
Jan 1, 1972·Zeitschrift für Zellforschung und mikroskopische Anatomie·K P Dingemans, C A Feltkamp
Feb 1, 1970·General and Comparative Endocrinology·J Schechter
Jan 1, 1970·Zeitschrift für Zellforschung und mikroskopische Anatomie·S J CarpenterH L Borison
Jun 9, 1980·Brain Research·T NakajimaK Takahashi
Jan 1, 1982·Comparative Immunology, Microbiology and Infectious Diseases·Y Iwasaki, N Minamoto
Jan 1, 1980·Cell and Tissue Research·D R Ciocca
Jan 1, 1981·Cell and Tissue Research·R A PerryG B Ryan
Dec 1, 1964·The Journal of Comparative Neurology·V M TENNYSON, G D PAPPAS
May 1, 1965·The Journal of Cell Biology·J H VENABLE, R COGGESHALL

Citations

May 15, 2007·Cell and Tissue Research·Ken FujiwaraTakashi Yashiro
May 21, 2010·The Journal of Veterinary Medical Science·Sachi KuwaharaMakoto Seki
Sep 25, 1999·Archives of Histology and Cytology·K InoueS Ogawa

Related Concepts

Metazoa
Sonacide
Electron Microscopy
Scanning Electron Microscopy
Pituitary Stalk
Rats, Laboratory

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