Abstract
In vivo cryotechnique (IVCT) has been useful to examine native immunolocalizations of soluble proteins in animal kidneys, reflecting their living states. By using them, we have examined some immunolocalized proteins in nephrons of rat kidneys under experimental nephropathy induced by puromycin aminonucleoside (PAN) administration. At day 3 or day 9 after intraperitoneal PAN injection, IVCT was routinely performed for kidneys of anesthetized rats and followed by freeze-substitution fixation. Serial tissue sections were first stained with hematoxylin-eosin (HE) and then immunostained for serum albumin and IgG1. The excretion of urinary proteins began to increase at day 3. Plasma protein analyses indicated the typical nephrosis. At day 3, although little morphological changes were detected by HE staining, both albumin and IgG1 were immunolocalized along cytoplasm of podocytes and in apical parts of epithelial cells of proximal convoluted tubules. At day 9, intravascular congestion of erythrocytes was observed in almost all of the glomerular basement membranes (GBMs). Their relative immunoreactivities of albumin and IgG1 were weaker within blood vessels including GBMs. IVCT revealed dynamically changing processes of protein excretion and reabsorption in various segments of nephrons.
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Kawashima, E. et al. (2016). Immunohistochemical Analyses of Serum Proteins in Puromycin Aminonucleoside Nephropathy of Living Rat Kidneys. In: Ohno, S., Ohno, N., Terada, N. (eds) In Vivo Cryotechnique in Biomedical Research and Application for Bioimaging of Living Animal Organs. Springer, Tokyo. https://doi.org/10.1007/978-4-431-55723-4_24
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DOI: https://doi.org/10.1007/978-4-431-55723-4_24
Publisher Name: Springer, Tokyo
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