ProGeo-neo: a customized proteogenomic workflow for neoantigen prediction and selection.

Abstract:

BACKGROUND:Neoantigens can be differentially recognized by T cell receptor (TCR) as these sequences are derived from mutant proteins and are unique to the tumor. The discovery of neoantigens is the first key step for tumor-specific antigen (TSA) based immunotherapy. Based on high-throughput tumor genomic analysis, each missense mutation can potentially give rise to multiple neopeptides, resulting in a vast total number, but only a small percentage of these peptides may achieve immune-dominant status with a given major histocompatibility complex (MHC) class I allele. Specific identification of immunogenic candidate neoantigens is consequently a major challenge. Currently almost all neoantigen prediction tools are based on genomics data. RESULTS:Here we report the construction of proteogenomics prediction of neoantigen (ProGeo-neo) pipeline, which incorporates the following modules: mining tumor specific antigens from next-generation sequencing genomic and mRNA expression data, predicting the binding mutant peptides to class I MHC molecules by latest netMHCpan (v.4.0), verifying MHC-peptides by MaxQuant with mass spectrometry proteomics data searched against customized protein database, and checking potential immunogenicity of T-cell-recognization by additional screening methods. ProGeo-neo pipeline achieves proteogenomics strategy and the neopeptides identified were of much higher quality as compared to those identified using genomic data only. CONCLUSIONS:The pipeline was constructed based on the genomics and proteomics data of Jurkat leukemia cell line but is generally applicable to other solid cancer research. With massively parallel sequencing and proteomics profiling increasing, this proteogenomics workflow should be useful for neoantigen oriented research and immunotherapy.

journal_name

BMC Med Genomics

journal_title

BMC medical genomics

authors

Li Y,Wang G,Tan X,Ouyang J,Zhang M,Song X,Liu Q,Leng Q,Chen L,Xie L

doi

10.1186/s12920-020-0683-4

subject

Has Abstract

pub_date

2020-04-03 00:00:00

pages

52

issue

Suppl 5

issn

1755-8794

pii

10.1186/s12920-020-0683-4

journal_volume

13

pub_type

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