Deposition of IgA in Renal Glomeruli of Mink Affected with Aleutian Disease
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The glomerular deposition of immunoglobulin (Ig) was studied in sapphire mink affected with terminal Aleutian disease (AD). Fluorescein conjugated Ig-class specific antiserums were used to evaluate and identify the glomerular Ig. Kidneys of all 28 mink with documented AD had deposits of IgA and beta 1 C in a capillary and mesangial distribution. Only 7 of 28 mink had demonstrable glomerular IgG and/or IgM. In addition, interstitial plasma cell infiltrates in 17 of 19 kidneys stained exclusively with anti-IgA. All antiserums used in this study were evaluated for Ig-class specificity by both gel diffusion and agarose-bead techniques. The striking Ig class restriction demonstrated for glomerular Ig deposition in AD is discussed in light of current knowledge of the pathogenesis of AD glomerulopathy.
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