We report herein a rare case of IgAN associated with Hodgkin's disease in a 14-year-old boy. Clinical manifestations and laboratory parameters were improved after treatment with CHOP chemotherapy and enalapril. Urinary proteins were isolated and examined using state-of-the-art proteomic technology, before and during the treatment course. Two-dimensional gel electrophoresis showed obvious alterations in the urinary proteome profile in response to such therapy. Quantitative intensity analysis and gel mapping revealed 14 altered proteins with reduced excretion levels during the treatment course, including albumin, albumin complexed with decanoic acid, alpha-1 antitrypsin, cadherin-11 precursor, collagen alpha 1 (VI) chain precursor, complement C1q tumor necrosis factor-related protein, Ig heavy chain, Ig light chain, kininogen, inter-alpha-trypsin inhibitor (alpha-1 microglobulin), inter-alpha-trypsin inhibitor heavy chain, leucine-rich alpha-2 glycoprotein, beta-2 microglobulin, and transferrin precursor. Their potential roles in the pathogenesis and pathophysiology of IgAN are discussed.
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