What is the role of cross-presentation in CD8 T lymphocyte priming?

Cross-priming, the activation of naive CD8 T cells following DC-mediated cross-presentation—the process through which exogenous antigens are processed and presented onto MHC class I molecules—plays a major role in generating CD8 T cell immunity against cancers and viruses, upon vaccination, as well as in the induction …

Why is cross priming important?

The action of cross priming can bolster immunity against antigens that target intracellular peripheral tissues that are unable to be mediated by antibodies produced through B cells. Also, cross-priming avoids viral immune evasion strategies, such as suppression of antigen processing.

How do dendritic cells activate CD8 T cells?

Dendritic cells (DCs) play a central role in the regulation of the balance between CD8 T cell immunity vs. tolerance to tumor antigens. Cross-priming, a process which DCs activate CD8 T cells by cross-presenting exogenous antigens, plays a critical role in generating anti-tumor CD8 T cell immunity.

What is the purpose of CD8?

CD8 (cluster of differentiation 8) is a transmembrane glycoprotein that serves as a co-receptor for the T-cell receptor (TCR). Along with the TCR, the CD8 co-receptor plays a role in T cell signaling and aiding with cytotoxic T cell-antigen interactions.

What is the function of the CD8 receptor?

CD8 defines cytotoxic effector cells and perhaps subsets of natural killer and regulatory cells. It facilitates binding between the TCR and class I molecules and is important in protective immune lysis of virally infected parenchymal cells.

Are CD8 cells innate or adaptive?

Independent of T cell receptor ligation, CD8 T cells can mount a response against pathogens by secreting cytokines and can defend against tumors by directly killing transformed cells. This innate response has been shown to be beneficial in controlling several types of bacterial infections.

What is the function of CD8 receptor?

CD8 acts as a co-receptor during T-cell antigen engagement. The dominant molecular basis for this functional role in antigen recognition centres on the association of the CD8 α-chain with p56Lck, via two vicinal cysteines, which interact through a zinc chelate complex to produce a co-activation signal.