Annexin 6 Immunoreactivity in Select Cell Populations in the Rat BrainMargaret M. Mogaa and Dan Zhouaa Terre Haute Center for Medical Education, Indiana University School of Medicine, Terre Haute, Indiana Correspondence to: Margaret M. Moga, Indiana U. School of Medicine, 135 Holmstedt Hall, ISU, Terre Haute, IN 47809. E-mail: mmoga@medicine.indstate.edu We examined the distribution of annexin 6 (ANX6) in rat brain with immunohistochemistry (IHC). Several neuronal cell populations were intensely labeled with the ANX6 monoclonal antibody (MAb), including layer 5 of neocortex, the lateral septum, the lateral hypothalamic area, the red nucleus, and the Purkinje cell layer in cerebellum. Neuronal immunolabeling was localized to the nucleus and the cytosol. Darkly stained ANX6-immunoreactive glia, with the morphology characteristic of astrocytes, were abundant in the hippocampus, substantia nigra reticulata, and cerebellum. Evidence suggests that ANX6 may function in neuronal and glial calcium-dependent processes. (J Histochem Cytochem 50:12771280, 2002) Key Words: calcium-binding protein, cerebral cortex, lateral hypothalamus, radial glia, basal forebrain
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