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The shape and distribution of astrocytes in the retina of the adult rabbit

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Summary

Astrocytes stained by antibodies to glial fibrillary acidic protein (GFAP) were examined in whole-mount preparations of retinae from adult rabbits and found to be restricted to the medullary rays. Astroglial cells exhibited a variety of shapes that varied between two extreme morphologies. One extreme was an astrocyte that possessed a few sturdy primary processes as well as finer processes and was strongly GFAP positive. The other extreme was an astroglial cell that displayed a star-shaped appearance; its perikarya gave rise to a few thin, radially oriented processes, which were rather weakly GFAP positive. The majority of astroglial processes were aligned with the ganglioncell axons, but some of their processes were in contact with capillaries. It has been proposed that astrocytes are specifically associated with ganglion-cell axons. Their restriction to the medullary rays in the retina of the rabbit suggests, however, that their physiological role is also concerned with the vascular system.

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Schnitzer, J., Karschin, A. The shape and distribution of astrocytes in the retina of the adult rabbit. Cell Tissue Res. 246, 91–102 (1986). https://doi.org/10.1007/BF00219004

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