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Updated: Jun 7, 2026

In Vitro Assessment of Cardiac Function Using Skinned Cardiomyocytes
Published on: June 22, 2020
Functions for the cardiomyokine, MANF, in cardioprotection, hypertrophy and heart failure
1The SDSU Heart Institute and the Department of Biology, San Diego State University, San Diego, CA 92182, USA. cglembotski@sciences.sdsu.edu
Insights
Mesencephalic astrocyte-derived neurotrophic factor (MANF) is a novel cardiomyokine. It protects the ischemic heart and may offer new therapies for heart disease.
Area of Science:
- Cardiology
- Molecular Biology
- Biochemistry
Background:
- Cardiomyokines are heart-secreted proteins influencing cardiovascular function.
- Mesencephalic astrocyte-derived neurotrophic factor (MANF) is identified as a novel cardiomyokine.
- MANF expression increases in ischemic hearts, potentially via ER stress pathways.
Purpose of the Study:
- To review the role of MANF as a cardiomyokine.
- To explore MANF's function in the context of ER stress and ischemic heart disease.
- To assess MANF's therapeutic potential for cardiovascular conditions.
Main Methods:
- Literature review of studies on MANF, cardiomyokines, and ischemic heart disease.
- Analysis of MANF expression patterns in response to ER stress.
- Evaluation of existing data on MANF's protective effects in cardiovascular models.
Main Results:
- MANF expression is upregulated in ischemic hearts, even under ER stress conditions that inhibit other cardiomyokines.
- MANF demonstrates protective effects against ischemic damage.
- MANF exhibits anti-hypertrophic properties.
Conclusions:
- MANF functions as a cardiomyokine with significant roles in the stressed, ischemic heart.
- MANF's unique behavior under ER stress highlights its importance.
- MANF presents translational potential as a therapeutic agent for ischemic heart disease.
Abstract:
We define cardiomyokines as heart-derived secreted proteins that affect cardiovascular function via autocrine, paracrine and/or endocrine mechanisms. The subject of this review is the cardiomyokine, mesencephalic astrocyte-derived neurotrophic factor (MANF). The expression of MANF is increased in the ischemic heart, in part, through activation of ER stress, a condition that drastically impairs the expression and secretion of most cardiomyokines. This novel function of MANF suggests that it may have important roles in the ER stressed, ischemic heart. Consistent with this are recent findings showing that MANF protects against ischemic damage, and that it is anti-hypertrophic. Accordingly, in light of its function as a potentially secreted cardiomyokine, MANF has translational potential as a novel therapy for ischemic heart disease. This article is part of a special issue entitled "Key Signaling Molecules in Hypertrophy and Heart Failure."
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