What is the clinical evidence from this study?

Population: Cardiac fibrosis. Intervention: Apelin. Primary outcome: Cardiac fibroblast activation, collagen production, and myocardial fibrotic remodelling.

What does this research mean for the field?

Apelin prevents cardiac fibroblast activation, collagen production, and subsequent cardiac fibrotic remodeling by inhibiting sphingosine kinase 1 (SphK1) activity. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This study aims to investigate the role of apelin in preventing cardiac fibroblast activation and collagen production, and explore underlying mechanisms.

July 10, 2026European Heart JournalOpen Access

Apelin prevents cardiac fibroblast activation and collagen production through inhibition of sphingosine kinase 1

Q: What are the key findings of this study?

Apelin inhibited TGF-β-stimulated activation of cardiac fibroblasts and prevented structural remodelling and ventricular dysfunction in a mouse aortic banding model via a SphK1-dependent mechanism.

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Key result

Apelin prevents structural remodeling and ventricular dysfunction in mice via a SphK1-dependent mechanism.

Why the study?

Whether apelin is involved in cardiac fibroblast activation, myofibroblast formation, and cardiac fibrotic remodelling remains unknown.

Does apelin prevent cardiac fibroblast activation and fibrotic remodeling in mouse models of pressure overload?

Key Points

This study aims to investigate the role of apelin in preventing cardiac fibroblast activation and collagen production, and explore underlying mechanisms.
In vitro experiments using mouse cardiac fibroblasts from normal and pressure-overload hearts were conducted.
Cardiac fibroblasts were pretreated with varying concentrations of apelin (1-100 nM) to study TGF-β-mediated effects.
In vivo studies utilized an aortic banding model to observe apelin effects on myocardial fibrotic remodeling.
Apelin treatment significantly inhibited α-SMA expression and collagen production in naïve and activated cardiac fibroblasts (p<0.05).
Apelin reduced sphingosine kinase 1 (SphK1) activity, which correlated with decreased collagen accumulation.
Two-week post-treatment with apelin after aortic banding mitigated cardiac remodeling, myocyte hypertrophy, and ventricular dysfunction (p<0.01).

Structured PICO

Does apelin prevent cardiac fibroblast activation and fibrotic remodeling in mouse models of pressure overload?

Population

In vitro and in vivo study using mouse cardiac fibroblasts and an aortic banding model to assess the effects of apelin on cardiac fibrosis.

Intervention

Apelin (1-100 nM in vitro; administration 2 weeks after aortic banding in vivo)

Outcome

Expression of the myofibroblast marker α-smooth muscle actin (α-SMA) and collagen production, and myocardial fibrotic remodellingsurrogate

Apelin prevents cardiac fibroblast activation and structural remodeling through a SphK1-dependent mechanism, suggesting a potential therapeutic target for progressive heart failure.

Discussion

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Key expert perspectives

Captured external expert commentary on this paper, strongest first. Original sources are linked where available.

VL Vladislav LeonovStem cell researcher, University of Wisconsin-Madison

“administration of apelin has been demonstrated to blunt cardiac fibroblast activation and fibrosis”

University of Wisconsin-MadisonEditorial

Implication

Apelin pathways merit exploration as anti-fibrotic targets in heart failure; leaves open whether this extends to clinical outcomes.

Cite This Study

Pchejetski et al. (2011) studied Cardiac fibrosis. Apelin was evaluated on Cardiac fibroblast activation, collagen production, and myocardial fibrotic remodelling. Apelin inhibited TGF-β-stimulated activation of cardiac fibroblasts and prevented structural remodelling and ventricular dysfunction in a mouse aortic banding model via a SphK1-dependent mechanism.

synapsesocial.com/papers/6a5064a6330ff8da2846ea49 https://doi.org/10.1093/eurheartj/ehr389

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Apelin prevents cardiac fibroblast activation and collagen production through inhibition of sphingosine kinase 1

Key Points

Structured PICO

Discussion

Key expert perspectives

Implication

Cite This Study

Apelin prevents cardiac fibroblast activation and collagen production through inhibition of sphingosine kinase 1

Key Points

Structured PICO

Discussion

Key expert perspectives

Implication

Cite This Study

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