Mycobacterium tuberculosis-induced cell death of primary human monocytes and macrophages is not significantly modulated by tumor necrosis factor-targeted biologicals

J Investig Dermatol Symp Proc. 2007 May;12(1):26-33. doi: 10.1038/sj.jidsymp.5650033.

Abstract

Differential induction of cell death in mycobacteria-infected monocytes and macrophages has been invoked as one possible mechanism by which some tumor necrosis factor (TNF)-targeted biologicals reactivate tuberculosis more frequently than others. We infected primary human monocytes and monocyte-derived macrophages with the virulent Mycobacterium tuberculosis strain H37Rv and followed the rate of cell death in the absence or presence of a wide concentration range of four different TNF-targeted biologicals: infliximab and adalimumab (both monoclonal antibodies to human TNF) and etanercept and polyethylene-glycols TNFR1 (fusion constructs of human TNFR2 and TNFR1, respectively). None of the TNF-targeted biologicals used modulated the death rate of monocytes/macrophages induced by infection with M. tuberculosis alone. Our data support the view that mycobacteria-induced cell death is largely independent of TNF and that the primary target for differential modulation by TNF-targeted biologicals during tuberculosis is not a recently recruited monocyte or freshly differentiated macrophage.

MeSH terms

  • Adalimumab
  • Antibodies, Monoclonal / pharmacology
  • Antibodies, Monoclonal, Humanized
  • Cell Death
  • Cells, Cultured
  • Etanercept
  • Humans
  • Immunoglobulin G / pharmacology
  • Infliximab
  • Macrophages / immunology
  • Macrophages / microbiology*
  • Macrophages / pathology
  • Monocytes / immunology
  • Monocytes / microbiology*
  • Monocytes / pathology
  • Mycobacterium tuberculosis / immunology
  • Mycobacterium tuberculosis / pathogenicity*
  • Polyethylene Glycols / pharmacology
  • Receptors, Tumor Necrosis Factor
  • Receptors, Tumor Necrosis Factor, Type I / pharmacology
  • Tumor Necrosis Factor-alpha / antagonists & inhibitors*

Substances

  • Antibodies, Monoclonal
  • Antibodies, Monoclonal, Humanized
  • Immunoglobulin G
  • PEGylated tumor necrosis factor alpha receptor 1
  • Receptors, Tumor Necrosis Factor
  • Receptors, Tumor Necrosis Factor, Type I
  • Tumor Necrosis Factor-alpha
  • Polyethylene Glycols
  • Infliximab
  • Adalimumab
  • Etanercept