Proliferative lesions and metalloproteinase activity in murine lupus nephritis mediated by type I interferons and macrophages Academic Article uri icon


MeSH Major

  • Gene Expression Regulation
  • Interferon Type I
  • Lupus Nephritis
  • Macrophages
  • Metalloproteases
  • Poly I-C
  • Proteinuria


  • Glomerulonephritis is a major cause of morbidity in patients with systemic lupus erythematosus. Although substantial progress has been made in the identification of pathogenic triggers that result in autoantibody production, little is known about the pathogenesis of aggressive proliferative processes that lead directly to irreversible glomerular damage and compromise of renal function. In this study, we describe a model of polyinosinic: polycytidylic acid-accelerated lupus nephritis in NZB/W mice that is characterized by severe glomerular proliferative lesions with de novo crescent formation, findings that are linked with decreased survival and adverse outcomes in lupus. Proliferative glomerulonephritis was associated with infiltrating kidney macrophages and renal expression of IFN-inducible genes, matrix metalloproteinases (MMPs), and growth factors. Crescent formation and renal MMP and growth factor expression were dependent on renal macrophages that expressed Il10, MMPs, osteopontin, and growth factors, including Pdgfc and Hbegf. Infiltrating macrophages and renal MMP expression were induced by type I IFN. These findings reveal a role for type I IFNs and alternatively activated macrophages in aggressive proliferative lesions of lupus nephritis.

publication date

  • February 16, 2010



  • Academic Article



  • eng

PubMed Central ID

  • PMC2840310

Digital Object Identifier (DOI)

  • 10.1073/pnas.0914902107

PubMed ID

  • 20133703

Additional Document Info

start page

  • 3012

end page

  • 7


  • 107


  • 7