Resident cardiac macrophages mediate adaptive myocardial remodeling.
Immunity
; 54(9): 2072-2088.e7, 2021 09 14.
Article
in En
| MEDLINE
| ID: mdl-34320366
ABSTRACT
Cardiac macrophages represent a heterogeneous cell population with distinct origins, dynamics, and functions. Recent studies have revealed that C-C Chemokine Receptor 2 positive (CCR2+) macrophages derived from infiltrating monocytes regulate myocardial inflammation and heart failure pathogenesis. Comparatively little is known about the functions of tissue resident (CCR2-) macrophages. Herein, we identified an essential role for CCR2- macrophages in the chronically failing heart. Depletion of CCR2- macrophages in mice with dilated cardiomyopathy accelerated mortality and impaired ventricular remodeling and coronary angiogenesis, adaptive changes necessary to maintain cardiac output in the setting of reduced cardiac contractility. Mechanistically, CCR2- macrophages interacted with neighboring cardiomyocytes via focal adhesion complexes and were activated in response to mechanical stretch through a transient receptor potential vanilloid 4 (TRPV4)-dependent pathway that controlled growth factor expression. These findings establish a role for tissue-resident macrophages in adaptive cardiac remodeling and implicate mechanical sensing in cardiac macrophage activation.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Cardiomyopathy, Dilated
/
Ventricular Remodeling
/
Macrophage Activation
/
Macrophages
Type of study:
Prognostic_studies
Limits:
Animals
/
Humans
Language:
En
Journal:
Immunity
Journal subject:
ALERGIA E IMUNOLOGIA
Year:
2021
Document type:
Article