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Apoptosis, Fas and systemic autoimmunity: the MRL-lpr/lpr model
G G Singer1, A C Carrera, A Marshak-Rothstein
1Department of Pathology, Brigham and Women's Hospital, Boston, MA 02115.
Current Opinion in Immunology
|December 1, 1994
Summary
Fas and Fas ligand (FasL) interactions are crucial for maintaining self-tolerance and regulating lymphocyte numbers. Deficiencies in Fas or FasL lead to autoimmunity, highlighting their essential roles.
Area of Science:
- Immunology
- Molecular Biology
- Cell Death
Background:
- Proteins encoded by the fas and fas ligand (fasL) genes mediate apoptotic cell death in lymphocytes.
- Fas-FasL interactions play a critical role in immune system regulation.
Purpose of the Study:
- To review the role of Fas-FasL interactions in maintaining self-tolerance.
- To elucidate the role of Fas-FasL interactions in homeostatic regulation of lymphocyte clonal expansion.
- To discuss autoimmunity mechanisms in Fas- and FasL-deficient mice.
Main Methods:
- Literature review of recent findings.
- Analysis of data from Fas- and FasL-deficient mutant mouse strains.
Main Results:
- Fas-FasL interactions are essential for maintaining tolerance to self antigens.
- These interactions regulate lymphocyte clonal expansion for immune homeostasis.
- Mutant mouse strains lacking Fas or FasL exhibit autoimmune phenotypes.
Conclusions:
- The Fas-FasL pathway is vital for preventing autoimmunity.
- Dysregulation of Fas-FasL signaling contributes to autoimmune diseases.
- Understanding this pathway offers insights into therapeutic strategies for autoimmune disorders.