Neoantigen-directed immune escape in lung cancer evolution

Rosenthal, R. et al. (2019) Neoantigen-directed immune escape in lung cancer evolution. Nature, 567(7749), pp. 479-485. (doi: 10.1038/s41586-019-1032-7) (PMID:30894752) (PMCID:PMC6954100)

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The interplay between an evolving cancer and a dynamic immune microenvironment remains unclear. Here we analyse 258 regions from 88 early-stage, untreated non-small-cell lung cancers using RNA sequencing and histopathology-assessed tumour-infiltrating lymphocyte estimates. Immune infiltration varied both between and within tumours, with different mechanisms of neoantigen presentation dysfunction enriched in distinct immune microenvironments. Sparsely infiltrated tumours exhibited a waning of neoantigen editing during tumour evolution, indicative of historical immune editing, or copy-number loss of previously clonal neoantigens. Immune-infiltrated tumour regions exhibited ongoing immunoediting, with either loss of heterozygosity in human leukocyte antigens or depletion of expressed neoantigens. We identified promoter hypermethylation of genes that contain neoantigenic mutations as an epigenetic mechanism of immunoediting. Our results suggest that the immune microenvironment exerts a strong selection pressure in early-stage, untreated non-small-cell lung cancers that produces multiple routes to immune evasion, which are clinically relevant and forecast poor disease-free survival.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Le Quesne, Professor John
Authors: Rosenthal, R., Cadieux, E. L., Salgado, R., Bakir, M. A., Moore, D. A., Hiley, C. T., Lund, T., Tanić, M., Reading, J. L., Joshi, K., Henry, J. Y., Ghorani, E., Wilson, G. A., Birkbak, N. J., Jamal-Hanjani, M., Veeriah, S., Szallasi, Z., Loi, S., Hellmann, M. D., Feber, A., Chain, B., Herrero, J., Quezada, S. A., Demeulemeester, J., Van Loo, P., Beck, S., McGranahan, N., Swanton, C., The TRACERx consortium, , and ,
College/School:College of Medical Veterinary and Life Sciences > School of Cancer Sciences
Journal Name:Nature
Publisher:Nature Research
ISSN (Online):1476-4687

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