Ultrastructural immunocytochemistry of glia cells

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Abstract
The introduction of acrylate resins (Lowicryl K 4M, LR White) into electronmicroscopic immunocytochemistry applied to embedded tissue (post-embedding method) has improved the localization of antigens because of a satisfactory preservation of both ultrastructure and antigenicity of tissues. Here we describe a method that allows double staining of intracellular and membranous determinants in ultrathin sections of nervous tissue and cultures of peripheral nervous system cells. Ultrathin sections of the rat central nervous system fixed on uncoated grids were stained first for MBP selectively on the one face, then the opposite face was stained for GFAP using monoclonal antibodies and indirect immunogold staining method (IGS). Cultured Schwann cells induced to express major histocompatibility complex (MHC) class II antigens were stained for class. H antigens by pre-embedding method then followed by post-embedding IGS for the other intracytopasmic antigens.

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