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[HLA-G: immune tolerance in normal and pathological physiology]
M Le Discorde1, P Moreau, N Rouas-Freiss
1Service de recherches en hémato-immunologie, CEA, DSV/DRM, hôpital Saint-Louis, institut d'hématologie, 1, avenue Claude Vellefaux, 75475 Paris, France.
Pathologie-Biologie
|March 5, 2002
Summary
Human Leukocyte Antigen-G (HLA-G) molecules facilitate immune tolerance by enabling cells to evade immune detection. Modulating HLA-G expression offers potential therapeutic strategies for pregnancy, transplantation, and cancer.
Area of Science:
- Immunology
- Molecular Biology
- Genetics
Context:
- Human Leukocyte Antigen-G (HLA-G) is a non-classical MHC class I molecule with diverse isoforms.
- Its expression is linked to immune tolerance, allowing foreign cells to evade immune responses.
- HLA-G plays a role in foeto-maternal symbiosis, tumor immune evasion, and graft acceptance.
Purpose:
- To review recent findings on HLA-G polymorphism, gene transcription, and its role in immune responses.
- To explore the implications of HLA-G in pregnancy, transplantation, and tumor growth.
- To discuss the therapeutic potential of modulating HLA-G expression.
Summary:
- HLA-G inhibits natural killer (NK) and cytotoxic T cell-mediated lysis.
- It induces apoptosis in activated CD8+ T cells via its soluble form.
- Recent data covers HLA-G polymorphism, transcription, and its involvement in immune tolerance during pregnancy, transplantation, and cancer.
Impact:
- Understanding HLA-G's immune-shielding properties is crucial for advancing immunotherapy.
- Targeting HLA-G expression could lead to novel treatments for promoting graft tolerance or enhancing anti-tumor immunity.
- This review provides insights into HLA-G's multifaceted role in immune regulation and disease.