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Phagocytic activity of the stellate cells in the anuran pars intermedia



Phagocytic activity of the stellate cells in the anuran pars intermedia



Cell & Tissue Research 208(1): 85-98



To study the stellate cell and its functions, the ultrastructure of this cell type in the neurointermediate lobe of the bullfrog, Rana catesbeiana, was examined in organ and dissociated-cell culture. The cytoplasmic activity of stellate cells from neurointermediate lobes incubated 3.5 or 5.5 h was greater than that of those in vivo. Mitochondria and bundles of cytoplasmic filaments were numerous, in addition to prominent, well-developed Golgi complexes with associated vesicles. There were phagocytic vacuoles containing cellular debris. The stellate cells formed cytoplasmic processes that phagocytosed this extracellular debris which belonged to the secretory cells of the pars intermedia. The stellate cells from the dissociated-cell preparations contained debris within phagocytic vacuoles. In those neurointermediate lobes transplanted for 3.5 to 4 days into the anterior chamber of the eye, the stellate cells demonstrated similar phagocytic ability, but the phagocytic vacuoles contained material that seemed to be at a later stage of degradation. In all 3 conditions the stellate cells did not release this cellular debris nor did they undergo cell division. These glial-like stellate cells of the pars intermedia acted as macrophages in vitro.

Accession: 006092402

Download citation: RISBibTeXText

PMID: 6966973

DOI: 10.1007/bf00234175

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