PMID- 8089806 OWN - NLM STAT- MEDLINE DCOM- 19941019 LR - 20061115 IS - 0022-3417 (Print) IS - 0022-3417 (Linking) VI - 173 IP - 2 DP - 1994 Jun TI - Pathogenesis of IgA nephropathy: in vitro activation of human mesangial cells by IgA immune complex leads to cytokine secretion. PG - 119-26 AB - IgA immune complex (IC) plays a crucial role in the pathogenesis of IgA nephropathy (IgAN). As IgA-IC is not itself cytotoxic, other mediators may be involved in the pathogenesis. In order to elucidate the mechanisms by which IgA-IC mediates renal injury in IgAN, the ability of IgA-IC to 'activate' cultured human mesangial cells (HMC) was studied. HMC were incubated with nephritogenic IgA-IC, containing a MOPC-315 plasmacytoma-derived IgA anti-dinitrophenyl (DNP) and DNP-conjugated bovine serum albumin. The cells showed morphological changes, an accelerated rate of proliferation, and increased production of interleukin-1 (IL-1), interleukin-6 (IL-6), platelet activating factor (PAF) and generation of superoxide anion. The enhancement of IL-1 and IL-6 mRNA expression in HMC incubated with IgA-IC was identified by dot blot analysis. Northern blot hybridization also demonstrated an augmented IL-6 mRNA expression in HMC treated with IgA-IC. These results suggest that nephritogenic IgA-IC may amplify the proliferation of HMC and the production of immune/chemical mediators and superoxide anion thereby resulting in the renal lesions of IgAN. FAU - Chen, A AU - Chen A AD - Department of Medical Research, Veterans General Hospital-Taipei, Taiwan, Republic of China. FAU - Chen, W P AU - Chen WP FAU - Sheu, L F AU - Sheu LF FAU - Lin, C Y AU - Lin CY LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Pathol JT - The Journal of pathology JID - 0204634 RN - 0 (Antigen-Antibody Complex) RN - 0 (Immunoglobulin A) RN - 0 (Interleukin-1) RN - 0 (Interleukin-6) RN - 0 (Interleukins) RN - 0 (Platelet Activating Factor) RN - 0 (RNA, Messenger) RN - 11062-77-4 (Superoxides) SB - IM MH - Adolescent MH - Adult MH - Antigen-Antibody Complex/*immunology MH - Blotting, Northern MH - Cell Division/immunology MH - Cells, Cultured MH - Child MH - Glomerular Mesangium/cytology/*immunology MH - Glomerulonephritis, IGA/*immunology MH - Humans MH - Immunoglobulin A/*immunology MH - Interleukin-1/biosynthesis/genetics MH - Interleukin-6/biosynthesis/genetics MH - Interleukins/*biosynthesis MH - Platelet Activating Factor/biosynthesis MH - RNA, Messenger/analysis MH - Superoxides/metabolism EDAT- 1994/06/01 00:00 MHDA- 1994/06/01 00:01 CRDT- 1994/06/01 00:00 PHST- 1994/06/01 00:00 [pubmed] PHST- 1994/06/01 00:01 [medline] PHST- 1994/06/01 00:00 [entrez] AID - 10.1002/path.1711730208 [doi] PST - ppublish SO - J Pathol. 1994 Jun;173(2):119-26. doi: 10.1002/path.1711730208.