PMID- 17576695 OWN - NLM STAT- MEDLINE DCOM- 20071024 LR - 20220318 IS - 1462-0324 (Print) IS - 1462-0324 (Linking) VI - 46 IP - 9 DP - 2007 Sep TI - Characterization of haemorrhagic pulmonary capillaritis: another manifestation of Pristane-induced lupus. PG - 1405-10 AB - OBJECTIVES: Pristane-induced lupus is a well-established model of murine lupus. Mice injected with Pristane develop lupus-specific autoantibodies and glomerulonephritis. A chance observation led us to identify and characterize haemorrhagic pulmonary capillaritis in Pristane-injected mice. METHODS: Eight-week-old C57Bl/10 (B10, H-2(b)) mice received a single intraperitoneal injection of 0.5 ml of Pristane. Control mice received phosphate-buffered saline (PBS) injection. Mice were bled at 2 weeks after Pristane injection and monthly thereafter for serology and for antinuclear antibody (ANA). To characterize pulmonary disease, bronchoalveolar lavage (BAL) was carried out for total and differential cell count. Cytokines levels were checked for IL-2, IL-4, TNF-alpha, IFN-gamma, IL-6 and IL-10. Lungs were examined by histopathology and electron microscopy. RESULTS: All mice injected with Pristane developed a pulmonary capillaritis with perivascular infiltration with macrophages, neutrophils, lymphocytes and eosinophils. In addition, alveoli showed macrophage and neutrophil infiltration. The degree of perivascular and alveolar inflammation was moderate to severe. BAL was inflammatory with cell composition of macrophages, neutrophils, lymphocyte and eosinophils. There was evidence of endothelial injury on electron microscopy but no evidence of immune complex deposition. IL-6 and IL-10 were increased in BAL but levels of TNF-alpha, IFN-gamma, IL-2 and IL-4 were not. Anti-neutrophil cytoplasm antibody (ANCA) was negative. Kidneys demonstrated an increase in mesangial matrix and cellularity compatible with WHO Class II lupus lesion. There were immune complexes and complement deposition in the kidney. There were oil granulomas in peritoneum, spleen and liver but no evidence of vasculitis in these organs was seen. CONCLUSION: The relative ease and high penetrability of lesion makes it an attractive model to study pulmonary vasculitis. FAU - Chowdhary, V R AU - Chowdhary VR AD - Division of Rheumatology, Department of Medicine, Mayo Clinic College of Medicine, 200, 1st SW Rochester, MN 55905, USA. FAU - Grande, J P AU - Grande JP FAU - Luthra, H S AU - Luthra HS FAU - David, C S AU - David CS LA - eng PT - Journal Article DEP - 20070618 PL - England TA - Rheumatology (Oxford) JT - Rheumatology (Oxford, England) JID - 100883501 RN - 0 (Antibodies, Antinuclear) RN - 0 (Immunosuppressive Agents) RN - 0 (Interleukin-6) RN - 0 (Terpenes) RN - 130068-27-8 (Interleukin-10) RN - 26HZV48DT1 (pristane) SB - IM MH - Animals MH - Antibodies, Antinuclear/biosynthesis MH - Bronchoalveolar Lavage Fluid/cytology MH - Disease Models, Animal MH - Granuloma, Foreign-Body/chemically induced/pathology MH - Hemorrhage/*chemically induced/immunology/pathology MH - Immunosuppressive Agents/toxicity MH - Interleukin-10/biosynthesis MH - Interleukin-6/biosynthesis MH - Lung/ultrastructure MH - Lung Diseases/*chemically induced/immunology/pathology MH - Lupus Erythematosus, Systemic/*chemically induced/immunology/pathology MH - Mice MH - Mice, Inbred C57BL MH - Terpenes/*toxicity MH - Vasculitis/*chemically induced/immunology/pathology EDAT- 2007/06/20 09:00 MHDA- 2007/10/25 09:00 CRDT- 2007/06/20 09:00 PHST- 2007/06/20 09:00 [pubmed] PHST- 2007/10/25 09:00 [medline] PHST- 2007/06/20 09:00 [entrez] AID - kem117 [pii] AID - 10.1093/rheumatology/kem117 [doi] PST - ppublish SO - Rheumatology (Oxford). 2007 Sep;46(9):1405-10. doi: 10.1093/rheumatology/kem117. Epub 2007 Jun 18.