Abstract
Although cancer immunotherapy shows efficacy with adoptive T cell therapy (ACT) and antibody-based immune checkpoint blockade, efficacious therapeutic vaccination of cancer patients with tumor-associated antigens (TAAs) remains largely unmet. Current cancer vaccines utilize nonmutated shared TAAs that may have suboptimal immunogenicity. Experimental evidence underscores the strong immunogenicity of unique TAAs derived from somatically mutated cancer proteins, whose massive characterization has been precluded until recently by technical limitations. The development of cost-effective, high-throughput DNA sequencing approaches makes now possible the rapid identification of all the somatic mutations contained in a cancer cell genome. This method, combined with robust bioinformatics platforms for T cell epitope prediction and established reverse immunology approaches, provides us with an integrated strategy to identify patient-specific unique TAAs in a relatively short time, compatible with their potential use in the clinic. Hence, it is now for the first time possible to quantitatively define the patient’s unique tumor antigenome and exploit it for vaccination, possibly in combination with ACT and/or immune checkpoint blockade to further increase immunotherapy efficacy.
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Abbreviations
- ACT:
-
Adoptive T cell therapy
- Ags:
-
Antigens
- CAN-genes:
-
Candidate cancer genes
- exome-Seq:
-
Exome sequencing
- mAb:
-
Monoclonal antibody
- MSI:
-
Microsatellite instable
- MSS:
-
Microsatellite stable
- RNA-Seq:
-
RNA sequencing
- SNP-array:
-
Single nucleotide polymorphism
- TAAs:
-
Tumor-associated antigens
- TCR:
-
Tell receptor
- TCGA:
-
The Cancer Genome Atlas
- Tregs:
-
CD4+CD25+T regulatory cells
- UV:
-
Ultraviolet
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Acknowledgments
Supported by Associazione Italiana per la Ricerca sul Cancro-AIRC to G. Casorati, G.Parmiani and P.Dellabona.
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This paper is a Focussed Research Review based on a presentation given at the Eleventh Meeting of the Network Italiano per la Bioterapia dei Tumori (NIBIT) on Cancer Bio-Immunotherapy, held in Siena, Italy, 17th–19th October 2013. It is part of a CII series of Focussed Research Reviews and meeting report.
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Trajanoski, Z., Maccalli, C., Mennonna, D. et al. Somatically mutated tumor antigens in the quest for a more efficacious patient-oriented immunotherapy of cancer. Cancer Immunol Immunother 64, 99–104 (2015). https://doi.org/10.1007/s00262-014-1599-7
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DOI: https://doi.org/10.1007/s00262-014-1599-7