Macrophages, Metabolism and Heterophagy in the Heart.
Level 5 - mechanism / opinion, no new human data
Narrative review / mechanism-based expert perspective with no new human data.
PubMed 35113662 · doi:10.1161/CIRCRESAHA.121.319812
What was done
This paper provides an immunological perspective and narrative overview on the metabolic interactions between cardiac macrophages and cardiomyocytes, focusing on the clearance of ejected dysfunctional mitochondria (termed heterophagy) to preserve organelle quality control in the heart.
What was found
The abstract reports no empirical data, statistical values, or quantitative measurements. It presents the concept that resident cardiac macrophages act as support cells that engulf discarded cardiomyocyte mitochondria to maintain myocardial proteostasis and metabolic fitness.
Why it matters
It highlights a critical non-immune, metabolic homeostatic role for resident macrophages in supporting cardiomyocyte longevity and cardiac function.
Limits
As a conceptual review, it provides no original clinical or experimental data in the abstract. The described mechanisms rely largely on preclinical models and biological analogies, and translation to human heart disease remains to be established.
Cited by
- supports A population of immune cells resides in the heart to regulate cardiomyocyte function and eliminate their cellular byproducts.