CRISPR-Cas9 screening identifies an IRF1-SOCS1-mediated negative feedback loop that limits CXCL9 expression and antitumor immunity.
CP: Cancer
CRISPR-Cas9
Cxcl10
Cxcl9
DCs
Irf1
Socs1
cancer
immunotherapy
macrophages
Journal
Cell reports
ISSN: 2211-1247
Titre abrégé: Cell Rep
Pays: United States
ID NLM: 101573691
Informations de publication
Date de publication:
29 Aug 2023
29 Aug 2023
Historique:
received:
12
08
2022
revised:
13
06
2023
accepted:
07
08
2023
pubmed:
22
8
2023
medline:
22
8
2023
entrez:
22
8
2023
Statut:
ppublish
Résumé
CXCL9 expression is a strong predictor of response to immune checkpoint blockade therapy. Accordingly, we sought to develop therapeutic strategies to enhance the expression of CXCL9 and augment antitumor immunity. To perform whole-genome CRISPR-Cas9 screening for regulators of CXCL9 expression, a CXCL9-GFP reporter line is generated using a CRISPR knockin strategy. This approach finds that IRF1 limits CXCL9 expression in both tumor cells and primary myeloid cells through induction of SOCS1, which subsequently limits STAT1 signaling. Thus, we identify a subset of STAT1-dependent genes that do not require IRF1 for their transcription, including CXCL9. Targeting of either IRF1 or SOCS1 potently enhances CXCL9 expression by intratumoral macrophages, which is further enhanced in the context of immune checkpoint blockade therapy. We hence show a non-canonical role for IRF1 in limiting the expression of a subset of STAT1-dependent genes through induction of SOCS1.
Identifiants
pubmed: 37605534
pii: S2211-1247(23)01025-2
doi: 10.1016/j.celrep.2023.113014
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
113014Informations de copyright
Copyright © 2023 The Author(s). Published by Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of interests P.A.B. declares the following conflicts: research funding from AstraZeneca, Bristol-Myers-Squibb, and Gilead Sciences. P.K.D. declares the following conflicts: research funding from Myeloid Therapeutics, Prescient Therapeutics, Bristol-Myers-Squibb, and Juno Therapeutics.