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Related Experiment Videos

Tumor necrosis factor identified in multiple sclerosis brain.

F M Hofman1, D R Hinton, K Johnson

  • 1Department of Pathology, University of Southern California School of Medicine, Los Angeles.

The Journal of Experimental Medicine
|August 1, 1989
PubMed
Summary

Tumor necrosis factor (TNF) was found in brain lesions of multiple sclerosis (MS) patients. This suggests immune cells and cytokines play a key role in MS disease progression.

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Area of Science:

  • Neuroimmunology
  • Pathology

Background:

  • Multiple sclerosis (MS) is a chronic inflammatory demyelinating disease of the central nervous system.
  • The role of specific cytokines, such as tumor necrosis factor (TNF), in MS pathogenesis is not fully understood.

Purpose of the Study:

  • To investigate the presence and cellular localization of TNF in brain lesions from patients with MS.
  • To compare TNF expression in MS lesions with other neurological diseases and normal brain tissue.

Main Methods:

  • Immunocytochemical techniques were employed to detect TNF in frozen brain specimens.
  • Brain tissue samples included those from patients with MS, subacute sclerosing panencephalitis, Alzheimer's disease, and normal controls.

Main Results:

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  • TNF-positive (TNF+) cells were identified within brain lesions of MS and subacute sclerosing panencephalitis.
  • In MS lesions, TNF+ staining was observed in both astrocytes and macrophages.
  • No TNF+ cells were detected in Alzheimer's disease or normal brain tissue.

    • Conclusions:

    • The presence of TNF in MS lesions indicates its involvement in the inflammatory processes of the disease.
    • Cytokines and the immune response are likely significant contributors to the progression of multiple sclerosis.