Key result
Immunolabeling of human brain and retina tissue demonstrated that carbonic anhydrase isoenzyme C is specific to oligodendrocytes and Müller cells, whereas GFA protein selectively labels astrocytes.
CA C and GFA protein are specific immunocytochemical markers for oligodendrocytes/Müller cells and astrocytes, respectively, in human brain and retina.
May refine glial cell identification in research; leaves open validation for neuropathological applications.
The specificities of carbonic anhydrase isoenzyme C (CA C) and glial fibrillary acidic (GFA) protein as immunocytochemical markers for different glial cell populations in human brain and retina were studied using indirect immunofluorescence and peroxidase-antiperoxidase complex methods. With antibodies against CA C, only those cerebral cells that were morphologically oligodendrocytes and Müller cells of the retina showed positive immunostaining reaction, whereas antibodies against GFA protein selectively labeled cerebral astrocytes and a part of the glial cells and fibers in the inner layers of the retina. In double labeling, when both glial cell markers were successively localized in the same cerebral tissue sections, GFA protein immunofluorescence was never found in the immunoperoxidase-stained CA C-positive cells, which further supports the oligodendrocyte-specificity of CA C in human brain.
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Kumpulainen et al. (1983) studied this question. Immunolabeling of carbonic anhydrase isoenzyme C and glial fibrillary acidic protein was evaluated on Cellular localization and specificity of CA C and GFA protein. Immunolabeling of human brain and retina tissue demonstrated that carbonic anhydrase isoenzyme C is specific to oligodendrocytes and Müller cells, whereas GFA protein selectively labels astrocytes.
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