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Regulation of class II MHC expression
W M Rohn1, Y J Lee, E N Benveniste
1Department of Physiology and Biophysics, University of Alabama, Birmingham 35294-0005, USA.
Critical Reviews in Immunology
|January 1, 1996
Summary
Major histocompatibility complex (MHC) class II molecules are vital for immune responses. Aberrant expression is linked to autoimmune disorders, while lack of expression causes bare lymphocyte syndrome (BLS).
Area of Science:
- Immunology
- Molecular Biology
- Genetics
Background:
- Major histocompatibility complex (MHC) class II molecules are glycoproteins crucial for initiating immune responses.
- Their expression is typically restricted to antigen-presenting cells like B cells and macrophages, but can be induced in other cells by cytokines.
- Dysregulation of MHC class II expression is implicated in autoimmune diseases and severe combined immunodeficiency disorders.
Purpose of the Study:
- To review agents that modulate MHC class II expression (inducers and inhibitors).
- To discuss the function of MHC class II antigens, particularly their role as signal transducers.
- To explore the molecular mechanisms regulating MHC class II expression.
Main Methods:
- Literature review of studies on MHC class II gene expression.
- Analysis of molecular pathways involved in MHC class II regulation.
- Examination of clinical correlations between MHC class II expression and disease.
Main Results:
- Identified various cytokines and other agents that induce MHC class II expression.
- Highlighted the role of MHC class II in antigen presentation to CD4+ T cells.
- Detailed the molecular mechanisms controlling the transcription of MHC class II genes.
Conclusions:
- Proper regulation of MHC class II expression is essential for immune homeostasis.
- Aberrant expression is a hallmark of autoimmune pathologies.
- Understanding MHC class II regulation offers therapeutic targets for immune disorders.