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Target intelligence / Profile preview
Tumor Antigen-Specific Peptide-MHC Complex (pMHC)
- Target
- pMHC
- Molecular classification
- MHC Class I complex, MHC Class II complex, Receptor ligand complex, Cell surface antigen
01
Overview
A tumor antigen-specific peptide-MHC complex is a molecular structure formed when a short peptide derived from a tumor-associated antigen is bound and presented by a major histocompatibility complex (MHC) molecule on the surface of cells. This complex is recognized by T cell receptors (TCRs) on T lymphocytes, enabling the immune system to detect and respond to cancer cells. These complexes underpin most modern cellular immunotherapies targeting solid tumors.
- Other names
- Tumor-associated antigen (TAA)-MHC complexPeptide-MHC complexT cell epitopeTumor antigen presentation complex
02
Mechanism of action
Stimulation of T cell response via TCR engagement; enhanced tumor cell recognition and killing; blockade of inhibitory signals on T cells.
03
Biological functions
Antigen presentationT cell activationImmune surveillanceTumor cell recognitionAdaptive immune response
04
Disease associations
CancerImmune evasionTarget for immunotherapy
05
Safety considerations
On-target, off-tumor toxicityCytokine release syndromeAutoimmunityGraft-versus-host disease (in adoptive cell transfer)Limited efficacy due to immune escape mechanisms
06
Interacting drugs
Therapeutic vaccines
3 more in the full profile.
07
Biomarkers
pMHC density on tumor cellsTCR avidity for pMHCExpression of MHC moleculesTIL (Tumor-infiltrating lymphocyte) densityIFN-gamma release upon pMHC stimulation
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