Using agonists for iNKT cells in cancer therapy.

Abstract:

:The capacity of α-galactosylceramide (α-GalCer) to act as an anti-cancer agent in mice through the specific stimulation of type I NKT (iNKT) cells has prompted extensive investigation to translate this finding to the clinic. However, low frequencies of iNKT cells in cancer patients and their hypo-responsiveness to repeated stimulation have been seen as barriers to its efficacy. Currently the most promising clinical application of α-GalCer, or its derivatives, is as stimuli for ex vivo expansion of iNKT cells for adoptive therapy, although some encouraging clinical results have recently been reported using α-GalCer pulsed onto large numbers of antigen presenting cells (APCs). In on-going preclinical studies, attempts to improve efficacy of injected iNKT cell agonists have focussed on optimising presentation in vivo, through encapsulation in particulate vectors, making structural changes that help binding to the presenting molecule CD1d, or injecting agonists covalently attached to recombinant CD1d. Variations on these same approaches are being used to enhance the APC-licencing function of iNKT cells in vivo to induce adaptive immune responses to associated tumour antigens. Looking ahead, a unique capacity of in vivo-activated iNKT cells to facilitate formation of resident memory CD8+ T cells is a new observation that could find a role in cancer therapy.

journal_name

Mol Immunol

journal_title

Molecular immunology

authors

Painter GF,Burn OK,Hermans IF

doi

10.1016/j.molimm.2020.12.010

subject

Has Abstract

pub_date

2021-02-01 00:00:00

pages

1-6

eissn

0161-5890

issn

1872-9142

pii

S0161-5890(20)30571-X

journal_volume

130

pub_type

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