ATR-mediated DNA damage responses underlie aberrant B cell activity in systemic lupus erythematosus.
Journal
Science advances
ISSN: 2375-2548
Titre abrégé: Sci Adv
Pays: United States
ID NLM: 101653440
Informations de publication
Date de publication:
28 10 2022
28 10 2022
Historique:
entrez:
28
10
2022
pubmed:
29
10
2022
medline:
2
11
2022
Statut:
ppublish
Résumé
B cells orchestrate autoimmune responses in patients with systemic lupus erythematosus (SLE), but broad-based B cell-directed therapies show only modest efficacy while blunting humoral immune responses to vaccines and inducing immunosuppression. Development of more effective therapies targeting pathogenic clones is a currently unmet need. Here, we demonstrate enhanced activation of the ATR/Chk1 pathway of the DNA damage response (DDR) in B cells of patients with active SLE disease. Treatment of B cells with type I IFN, a key driver of immunity in SLE, induced expression of ATR via binding of interferon regulatory factor 1 to its gene promoter. Pharmacologic targeting of ATR in B cells, via a specific inhibitor (VE-822), attenuated their immunogenic profile, including proinflammatory cytokine secretion, plasmablast formation, and antibody production. Together, these findings identify the ATR-mediated DDR axis as the orchestrator of the type I IFN-mediated B cell responses in SLE and as a potential novel therapeutic target.
Identifiants
pubmed: 36306362
doi: 10.1126/sciadv.abo5840
pmc: PMC9616496
doi:
Substances chimiques
ATR protein, human
EC 2.7.11.1
Ataxia Telangiectasia Mutated Proteins
EC 2.7.11.1
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
eabo5840Commentaires et corrections
Type : CommentIn
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