Abstract

A study of the solubilization of glomerular immune deposits by sera from patients with IgA nephropathy is described. Renal biopsy specimens were obtained from patients with IgA nephropathy and other glomerular diseases. These specimens were incubated with fresh and heated sera from the same patients and healthy adults at 37 degrees C for one hour in plastic tubes. The sections were stained with fluorescein isothiocyanate (FITC)-labeled heavy chain specific anti-human IgA antiserum and then examined with a fluorescent microscope. It was shown that the solubilization of glomerular immune deposits by sera from patients with IgA nephropathy was significantly less than that by sera from healthy adults. It is possible that impaired solubilization of immune complexes in vivo could lead to the accumulation of glomerular immune deposits in patients with IgA nephropathy.

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