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Updated: Jul 26, 2026
09:12
G Protein-selective GPCR Conformations Measured Using FRET Sensors in a Live Cell Suspension Fluorometer Assay
Published on: September 10, 2016
IgG Fc receptors.
1Laboratory of Molecular Genetics and Immunology, Rockefeller University, 1230 York Ave, New York, NY 10021, USA. ravetch@rockefeller.edu
Annual Review of Immunology
|March 13, 2001
Summary
Activating and inhibitory Fc gamma receptors (FcγRs) are crucial for immune responses. Balancing their signaling is vital for preventing autoimmune diseases and maintaining immune tolerance.
Area of Science:
- Immunology
- Molecular Biology
- Cellular Biology
Background:
- The in vivo functions of IgG Fc receptors (FcγRs) have been extensively studied since the development of mouse knockout models.
- Activating FcγRs play a key role in linking ligands to effector cells during inflammation and are implicated in host defense, therapeutic antibody efficacy, and autoimmune conditions.
Purpose of the Study:
- To investigate the in vivo regulation of FcγR-mediated responses, focusing on the balance between activating and inhibitory signaling.
- To understand the consequences of disrupting this balance on immune responses and the development of autoimmunity.
Main Methods:
- Utilizing mouse knockout models for FcγRs.
- Analyzing immune responses in both afferent and efferent immune pathways.
- Investigating the role of inhibitory FcR signaling in maintaining peripheral tolerance and regulating activation thresholds.
Main Results:
- The importance of balancing activating and inhibitory FcγR signaling for proper immune function has become increasingly appreciated.
- Deletion of inhibitory FcR signaling leads to a hyperresponsive state with magnified effector responses.
- This imbalance, influenced by genetic or environmental factors, can culminate in autoimmunity and autoimmune disease.
Conclusions:
- FcγRs are critical regulators of immune responses, highlighting the biological significance of balancing activating and inhibitory signaling.
- Dysregulation of FcγR signaling contributes to autoimmune pathologies.
- The study of FcγRs provides a paradigm for understanding other activation/inhibitory receptor pairs in the immune system.
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