Single-cell transcriptomic analyses of cardiac immune cells reveal that Rel-driven CD72-positive macrophages induce cardiomyocyte injury.
Cardiovasc Res
; 118(5): 1303-1320, 2022 03 25.
Article
in En
| MEDLINE
| ID: mdl-34100920
ABSTRACT
AIMS:
The goal of our study was to investigate the heterogeneity of cardiac macrophages (CMφs) in mice with transverse aortic constriction (TAC) via single-cell sequencing and identify a subset of macrophages associated with heart injury. METHODS ANDRESULTS:
We selected all CMφs from CD45+ cells using single-cell mRNA sequencing data. Through dimension reduction, clustering, and enrichment analyses, CD72hi CMφs were identified as a subset of pro-inflammatory macrophages. The pseudo-time trajectory and ChIP-Seq analyses identified Rel as the key transcription factor that induces CD72hi CMφ differentiation. Rel KD and Rel-/- bone marrow chimaera mice subjected to TAC showed features of mitigated cardiac injury, including decreased levels of cytokines and ROS, which prohibited cardiomyocyte death. The transfer of adoptive Rel-overexpressing monocytes and CD72hi CMφ injection directly aggravated heart injury in the TAC model. The CD72hi macrophages also exerted pro-inflammatory and cardiac injury effects associated with myocardial infarction. In humans, patients with heart failure exhibit increased CD72hi CMφ levels following dilated cardiomyopathy and ischaemic cardiomyopathy.CONCLUSION:
Bone marrow-derived, Rel-mediated CD72hi macrophages play a pro-inflammatory role, induce cardiac injury and, thus, may serve as a therapeutic target for multiple cardiovascular diseases.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Myocytes, Cardiac
/
Heart Injuries
Type of study:
Prognostic_studies
Limits:
Animals
/
Humans
Language:
En
Journal:
Cardiovasc Res
Year:
2022
Document type:
Article
Affiliation country:
China