PMID- 15972949 OWN - NLM STAT- MEDLINE DCOM- 20050825 LR - 20190608 IS - 0002-9440 (Print) IS - 1525-2191 (Electronic) IS - 0002-9440 (Linking) VI - 167 IP - 1 DP - 2005 Jul TI - Inhibition of macrophage nuclear factor-kappaB leads to a dominant anti-inflammatory phenotype that attenuates glomerular inflammation in vivo. PG - 27-37 AB - Infiltrating macrophages (mphi) can cause injury or facilitate repair, depending on how they are activated by the microenvironment. Studies in vitro have defined the roles of individual cytokines and signaling pathways in activation, but little is known about how macrophages integrate the multiple signals they receive in vivo. We inhibited nuclear factor-kappaB in bone marrow-derived macrophages (BMDMs) by using a recombinant adenovirus expressing dominant-negative IkappaB (Ad-IkappaB). This re-orientated macrophage activation so they became profoundly anti-inflammatory in settings where they would normally be classically activated. In vitro, the lipopolysaccharide-induced nitric oxide, interleukin-12, and tumor necrosis factor-alpha synthesis was abrogated while interleukin-10 synthesis increased. In vivo, fluorescently labeled BMDMs transduced with Ad-IkappaB and injected into the renal artery significantly reduced inducible nitric oxide synthase and MHC class II expression when activated naturally in glomeruli of rats with nephrotoxic nephritis. Furthermore, although they only comprised 15% of glomerular macrophages, their presence significantly reduced glomerular infiltration and activation of host macrophages. Injury in nephrotoxic nephritis was also decreased when assessed morphologically and by severity of albuminuria. The results demonstrate the power of Ad-IkappaB-transduced BMDMs to inhibit injury when activated by acute immune-mediated inflammation within the glomerulus. FAU - Wilson, Heather M AU - Wilson HM AD - Department of Medicine and Therapeutics, University of Aberdeen, Institute of Medical Sciences, Foresterhill, Aberdeen, Scotland, AB25 2ZD, UK. h.m.wilson@abdn.ac.uk FAU - Chettibi, Salah AU - Chettibi S FAU - Jobin, Christian AU - Jobin C FAU - Walbaum, David AU - Walbaum D FAU - Rees, Andrew J AU - Rees AJ FAU - Kluth, David C AU - Kluth DC LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Am J Pathol JT - The American journal of pathology JID - 0370502 RN - 0 (NF-kappa B) RN - 130068-27-8 (Interleukin-10) SB - IM MH - Animals MH - Bone Marrow Cells MH - Electrophoretic Mobility Shift Assay MH - Flow Cytometry MH - In Vitro Techniques MH - Inflammation/immunology/*prevention & control MH - Interleukin-10/immunology MH - Kidney Glomerulus/*immunology/pathology MH - Macrophage Activation/immunology MH - Macrophages/*immunology MH - NF-kappa B/genetics/*immunology MH - Nephritis/immunology/pathology/*prevention & control MH - Phenotype MH - Rats MH - Transduction, Genetic PMC - PMC1603438 EDAT- 2005/06/24 09:00 MHDA- 2005/08/27 09:00 PMCR- 2006/01/01 CRDT- 2005/06/24 09:00 PHST- 2005/06/24 09:00 [pubmed] PHST- 2005/08/27 09:00 [medline] PHST- 2005/06/24 09:00 [entrez] PHST- 2006/01/01 00:00 [pmc-release] AID - S0002-9440(10)62950-1 [pii] AID - 10.1016/s0002-9440(10)62950-1 [doi] PST - ppublish SO - Am J Pathol. 2005 Jul;167(1):27-37. doi: 10.1016/s0002-9440(10)62950-1.