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- W1972539622 abstract "The effects of unilateral ureteral obstruction were studied in mice. Obstruction for 24 hr led to the formation of extratubular Tamm-Horsfall protein (TH) aggregates within the renal interstitium and at the base of distal convoluted tubular (DCT) cells. These DCT deposits were shown by ultrastructural analysis to be entirely extracellular. They had the fibrillar substructure characteristic of TH and had not been seen after urinary obstruction in other species. As a consequence of retrograde flow of urine to glomeruli, obstruction also caused TH aggregates to form within Bowman's spaces. These glomerular casts of TH were detected throughout the 3-week period of study after the release of unilateral obstruction. High serum titers of IgG antibodies to TH developed in mice intradermally immunized with TH but were not observed after obstruction alone. Circulating anti-TH antibodies combined with TH present on the basal surfaces of the thick ascending limb of the loop of Henle cells and DCT cells to form immune complexes in situ. Interstitial inflammation in the areas surrounding subepithelial tubular immune deposits was not present in the kidneys of immunized mice and was not selectively induced by temporary obstruction. However, foci of inflammation were seen in all obstructed kidneys. At later times, inflammatory foci in previously obstructed kidneys were associated with progressive scarring, primarily in polar regions. The location and severity of these changes within kidneys produced by obstruction in immunized mice did not differ from those in unimmunized mice. The titers of anti-TH antibodies in immunized mice were not enhanced or depressed as a consequence of unilateral ureteral obstruction. These studies demonstrate that complete obstruction of urinary flow in the mouse for periods as short as 24 hr may lead to progressive segmental renal scarring. These studies further indicate that increasing the quantities of extracellular TH by obstruction does not facilitate inflammatory responses to TH immune complexes formed in situ. While exposure of renal tissue to highly toxic components of extravasated urine may play a crucial role in inflammatory responses, autoimmunity to TH was not implicated as a contributing factor by the present studies in mice." @default.
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- W1972539622 date "1988-04-01" @default.
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- W1972539622 title "Extratubular Tamm-Horsfall protein deposits induced by ureteral obstruction in mice" @default.
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- W1972539622 doi "https://doi.org/10.1016/0090-1229(88)90144-4" @default.
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