ABSTRACT
AIM: To investigates the role of phosphatidic acid (PA) in the expression of several inflammatory mediators produced by glomerural macrophages (GM?). METHODS: The study was performed on a rat model of accelerated anti-glomerural basement membrane (anti-GBM) glomerulonephritis (GN). GN-GM? were isolated and identified. Peritoneal M? (P-M?) of both normal and GN rats were used as controls. Block and reverse test were investigated with rhIL-1? stimulated, lisofylline (LSF) and phosphatidic acid (PA). Macrophage expression of ICAM-1 and TGF-? 1 were assessed at the level of protein and gene by immunocytochemistry, northern blot and RT-PCR. RESULTS: (1) After stimulated with rhIL-1?, GN-GM? produced much more ICAM-1, MCP-1 and TGF-? 1 than P-M?, and it's gene expression was similar as protein product. (2) mRNA expression of these factors was up-regulated again after the GN-GM? were pretreated with LSF then PA was added. CONCLUSIONS: Since GN-GM? plays an important role for PA in the mediation of glomerular injury, inhibiting of PA production is the keypoint of blocking M? mediated inflammatory effects. LSF may be an effective medicine in therapy for acute inflammatory forms of GN.