Gosset CD83 molecule Overview
CD83 molecule is a type-I transmembrane glycoprotein of the immunoglobulin superfamily, expressed as membrane-bound and soluble forms. It is a highly specific surface marker for mature dendritic cells, but also appears on activated B cells, T cells, NK cells, macrophages, monocytes, and some epithelial cells. Functionally, CD83 regulates immune cell maturation, antigen presentation, and immune tolerance. Soluble CD83 has strong immune-suppressive activities and can inhibit bone erosion and inflammation in models of arthritis. CD83 is being investigated as a therapeutic target, particularly as an immune checkpoint in cancer, infection, and inflammatory disease. Mechanistically, CD83 modulates the expression of key costimulatory molecules (MHC II and CD86) by antagonizing ubiquitin ligase MARCH1, and its expression is tightly regulated during immune responses.
Mechanism of Action
Immune co-stimulation (membrane-bound CD83 promotes dendritic cell maturation and cytokine production); Immune suppression (soluble CD83 dampens immune responses and inflammation); Antagonism of MARCH1 ubiquitin ligase to stabilize MHC II and CD86 expression
Biological Functions
Disease Associations
Safety Considerations
- Potential for systemic immune suppression if targeted erroneously
- Possible off-target effects due to widespread expression on activated hematopoietic cells
- Therapeutic challenge: balancing immune activation versus tolerance or suppression
Interacting Drugs
Associated Biomarkers
| Biomarker |
|---|
| CD83 surface expression |
| Soluble CD83 |