PXD020750

PXD020750 is an original dataset announced via ProteomeXchange.

Title	An integrated genomic, proteomic and immunopeptidomic approach to discover treatment-induced neoantigens
Description	All nucleated mammalian cells express major histocompatibility complex (MHC) proteins that present peptides on cell surfaces for immune surveillance. These MHC-presented peptides (pMHC) can convey non-self antigens derived from pathogens or mutations to amount T-cell responses. Alterations in tumor-specific antigens – particularly mutation-bearing peptides (neoantigens) presented by MHC — can serve as potent substrates for anti-tumor immune responses. Here we employed an integrated genomic and proteomic antigen discovery strategy aimed at measuring interferon gamma (IFN-γ) induced alterations to antigen presentation, using a lymphoma cell line. IFN-γ treatment resulted in a set of differentially expressed proteins (2 % of all quantified proteins) including components of antigen presentation machinery or interferon signaling pathways. In addition, several proteasome subunits were found to be modulated, consistent with previous reports of immunoproteasome induction by IFN-γ exposure. This finding suggests that a modest proteomic response to IFN-γ could create larger alteration to cells antigen repertoires. Accordingly, by surveying immunopeptides, distinct peptide repertoires were exclusively observed in the IFN-γ induced samples. Furthermore, an additional set of presented peptides distinguished control and the IFN-γ samples by their altered relative abundances including neoantigens. Accordingly, we developed a classification system to distinguish peptides which are differentially presented due to altered expression from novel peptides resulting from changes in antigen processing. Taken together, these data demonstrate that IFN-γ can re-shape antigen repertoires by identity and by abundance. Extending this approach to models with greater clinical relevance should help develop strategies by which immunopeptide repertoires are intentionally reshaped to improve endogenous or vaccine-induced anti-tumor immune responses and potentially anti-viral immune responses.
HostingRepository	PRIDE
AnnounceDate	2021-09-09
AnnouncementXML	Submission_2021-09-09_07:29:31.412.xml
DigitalObjectIdentifier
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Niclas Olsson
SpeciesList	scientific name: Homo sapiens (Human); NCBI TaxID: 9606;
ModificationList	cysteinylation (disulfide with free L-cysteine); phosphorylated residue; monohydroxylated residue; deamidated residue
Instrument	LTQ Orbitrap Elite

Revision	Datetime	Status	ChangeLog Entry
0	2020-08-05 10:00:28	ID requested
⏵ 1	2021-09-09 07:29:32	announced

Olsson N, Heberling ML, Zhang L, Jhunjhunwala S, Phung QT, Lin S, Anania VG, Lill JR, Elias JE, An Integrated Genomic, Proteomic, and Immunopeptidomic Approach to Discover Treatment-Induced Neoantigens. Front Immunol, 12():662443(2021) [pubmed]

submitter keyword: Human, MHC, antigen presentation, interferon gamma, Orbitrap

Joshua E Elias
contact affiliation	Chan Zuckerberg Biohub, Stanford, CA, USA
contact email	josh.elias@czbiohub.org
lab head
Niclas Olsson
contact affiliation	Stanford University
contact email	nic.e.olsson@gmail.com
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD020750
     1. Label: PRIDE project
     2. Name: An integrated genomic, proteomic and immunopeptidomic approach to discover treatment-induced neoantigens