Key result
Macrophage MRTF-A deletion attenuates cardiac hypertrophy and fibrosis in mice by reducing ITGB2-mediated infiltration.
Why the study?
Macrophage-mediated inflammation is key in heart failure, which is preceded by cardiac hypertrophy, but the role and mechanism of macrophage MRTF-A in this process were unknown.
Does macrophage-specific deletion of MRTF-A or CD18 blockade reduce cardiac hypertrophy and inflammation in mice subjected to transverse aortic constriction?
Does macrophage-specific deletion of MRTF-A or CD18 blockade reduce cardiac hypertrophy and inflammation in mice subjected to transverse aortic constriction?
MRTF-A regulates macrophage trafficking via ITGB2 transcription, and its deletion or CD18 blockade attenuates cardiac hypertrophy and fibrosis in a mouse model of pressure overload.
No takes yet. Share an insight, caveat, or question.
Does not support clinical translation; leaves open MRTF-A/ITGB2 targeting in human pressure-overload HF.
Liu et al. (2021) studied Cardiac hypertrophy. Macrophage-specific deletion of MRTF-A vs. Wild-type (WT) littermates was evaluated on Cardiac hypertrophy and heart function. Macrophage-specific deletion of MRTF-A attenuated transverse aortic constriction-induced cardiac hypertrophy, fibrosis, and inflammation in mice by reducing ITGB2-mediated macrophage infiltration.
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