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- W1975577930 abstract "Glomerular IgA in IgA nephropathy (IgAN) is at least in part polymeric, and is thought to derive from the mucosal IgA system in view of the association between mucosal infection and haematuria in this condition. To investigate this hypothesis, an in situ hybridization (ISH) technique was developed for the detection of J chain mRNA, the expression of which has been correlated with the secretion of high level polymeric immunoglobulin (pIg). Endoscopic duodenal biopsies from ten patients and matched controls were examined by: (i) two color immunofluorescence (IF); (ii) ISH; and (iii) combined ISH and IF, to permit simultaneous identification of plasma cell type. IF revealed a reduction in the percentage of IgA plasma cells (P < 0.02) and increased absolute numbers of IgG cells (P < 0.02) in patient biopsies. ISH demonstrated fewer J chain mRNA expressing plasma cells (P < 0.005) with lower signal intensity (P < 0.002) in patients' biopsies compared with controls. Combined ISH and IF confirmed a reduction in J chain mRNA-positive IgA plasma cells in the patient biopsies (P < 0.02). The reduction in J chain mRNA expression in duodenal IgA plasma cells in IgAN argues against the gastrointestinal lamina propria as the source of glomerular pIgA." @default.
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- W1975577930 date "1994-03-01" @default.
- W1975577930 modified "2023-09-26" @default.
- W1975577930 title "Expression of J chain mRNA in duodenal IgA plasma cells in IgA nephropathy" @default.
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- W1975577930 doi "https://doi.org/10.1038/ki.1994.110" @default.
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