The PD-1/PD-L1 Pathway in Human Pathology

Author(s): M. Saresella, V. Rainone, N. M. Al-Daghri, M. Clerici, D. Trabattoni

Journal Name: Current Molecular Medicine

Volume 12 , Issue 3 , 2012

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T-cell activation is dependent on signals delivered through the antigen-specific T-cell receptor and accessory receptors on T-cells. Integration of signals through this family of costimulatory and inhibitory receptors and their ligands regulates the balance between T-cell activation, tolerance, and immunopathology. Programmed death 1 (PD-1) and its ligands, PD-L1 and PD-L2, deliver inhibitory signals and exert a vital and diverse range of immunoregulatory roles in T-cell activation, tolerance, and immune-mediated tissue damage. In this review, we revisit current understanding of the immunoregulatory functions of PD-1 and its ligands and their involvement in immune-mediated diseases.

Keywords: Alzheimer's disease, autoimmunity, costimulation, HIV infection, immune tolerance, multiple sclerosis, PD-1, PD-L1, T-cell activation, immune system, microbial pathogens, antigens, antigenic peptide/major histocompatibility complex, costimulatory signals, phenotype

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Article Details

Year: 2012
Published on: 01 March, 2012
Page: [259 - 267]
Pages: 9
DOI: 10.2174/156652412799218903
Price: $65

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