Abstract
We have devised a method for immunogold staining of unosmicated, plastic-embedded cells that gives high levels of specific staining without sacrificing cell ultrastucture. Important conditions include PLP (periodate-lysine-paraformaldehyde) fixation, postfixation with uranyl acetate to preserve membrane phospholipids, dehydration with acetone, low-temperature embedding in LR gold resin, and use of osmium tetroxide to stain thin sections after immunogold labeling. We developed this method to localize plasma membrane calcium pump ATPase in rat hepatocytes and hepatic sinusoidal endothelial cells. Most gold particles of Ca2+ pump ATPase were easily assigned to bile canalicular membranes in rat hepatocytes, and the gold particles of Ca2− pump ATPase were located on the labyrinthlike structures of the endothelial sinusoidal fenestrae in rat hepatic sinusoidal endothelial cells. In these studies, it was useful to preserve the cell membrane for postembedding methods.
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Ogi, M., Yokomori, H., Oda, M. et al. A novel immunocytochemical staining method that preserves cell membranes: Application for demonstrating Ca2+ pump ATPase in the liver. Med Electron Microsc 31, 100–106 (1998). https://doi.org/10.1007/BF01557787
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DOI: https://doi.org/10.1007/BF01557787