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2012 ; 12
(4
): 252-64
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The blockade of immune checkpoints in cancer immunotherapy
#MMPMID22437870
Pardoll DM
Nat Rev Cancer
2012[Mar]; 12
(4
): 252-64
PMID22437870
show ga
Among the most promising approaches to activating therapeutic antitumour immunity
is the blockade of immune checkpoints. Immune checkpoints refer to a plethora of
inhibitory pathways hardwired into the immune system that are crucial for
maintaining self-tolerance and modulating the duration and amplitude of
physiological immune responses in peripheral tissues in order to minimize
collateral tissue damage. It is now clear that tumours co-opt certain
immune-checkpoint pathways as a major mechanism of immune resistance,
particularly against T cells that are specific for tumour antigens. Because many
of the immune checkpoints are initiated by ligand-receptor interactions, they can
be readily blocked by antibodies or modulated by recombinant forms of ligands or
receptors. Cytotoxic T-lymphocyte-associated antigen 4 (CTLA4) antibodies were
the first of this class of immunotherapeutics to achieve US Food and Drug
Administration (FDA) approval. Preliminary clinical findings with blockers of
additional immune-checkpoint proteins, such as programmed cell death protein 1
(PD1), indicate broad and diverse opportunities to enhance antitumour immunity
with the potential to produce durable clinical responses.
|Animals
[MESH]
|Antigens, Neoplasm/immunology/metabolism
[MESH]
|CTLA-4 Antigen/physiology
[MESH]
|Cancer Vaccines/therapeutic use
[MESH]
|Clinical Trials as Topic
[MESH]
|Humans
[MESH]
|Immunotherapy
[MESH]
|Molecular Targeted Therapy
[MESH]
|Neoplasms/immunology/metabolism/*therapy
[MESH]
|Programmed Cell Death 1 Receptor/physiology
[MESH]