What does this research mean for the field?

IRF7 suppresses cardiac fibrosis by inhibiting HK1-dependent histone lactylation and preventing the transition of cardiac fibroblasts into myofibroblasts. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To elucidate the functional role and molecular mechanism of interferon regulatory factor 7 (IRF7) in cardiac fibroblast activation, pathological remodeling, and heart failure.

May 23, 2026EMBO Molecular MedicineOpen Access

IRF7 links HK1-dependent histone lactylation to fibroblast activation and cardiac fibrosis

Q: What is the clinical evidence from this study?

Population: Cardiac fibrosis and heart failure. Intervention: IRF7 overexpression or HK1 inhibition vs. Control (Empty vector or vehicle). Primary outcome: Cardiac fibrosis and heart function.

View Full Paper

Ask AI

Bookmark

Key result

Targeting the IRF7-HK1 axis attenuates cardiac fibrosis and preserves heart function in heart failure mice.

Why the study?

Quiescent cardiac fibroblasts transition into myofibroblasts that mediate cardiac fibrosis, but the role of interferon regulatory factor 7 (IRF7) in fibroblast activation and fibrosis was unclear.

Key Points

To elucidate the functional role and molecular mechanism of interferon regulatory factor 7 (IRF7) in cardiac fibroblast activation, pathological remodeling, and heart failure.
Assessed IRF7 knockdown and overexpression in primary human and murine cardiac fibroblasts stimulated with TGF-β or angiotensin II.
Engineered fibroblast-specific (Col1a2-CreERT2) and myofibroblast-specific (Postn-CreERT2) IRF7-knockout mice, alongside therapeutic Postn-driven AAV9-IRF7 rescue, in transverse aortic constriction and myocardial infarction models.
Conducted integrated transcriptomic profiling using RNA-seq and CUT&Tag-seq to identify downstream targets, with validation in human heart tissue specimens.
IRF7 knockdown amplified TGF-β-induced myofibroblast transition, proliferation, migration, and contraction in vitro, whereas IRF7 overexpression attenuated these phenotypes.
Fibroblast- or myofibroblast-specific IRF7 deletion exacerbated cardiac fibrosis and impaired left ventricular ejection fraction and fractional shortening post-injury without altering cardiac hypertrophy.
AAV9-mediated IRF7 overexpression achieved an over 6-fold upregulation in cardiac fibroblasts, averted heart failure progression, and suppressed hexokinase 1 (HK1) to blunt histone H3K9 lactylation.

Structured PICO

Population

Primary human and murine cardiac fibroblasts, mouse models of heart failure (transverse aortic constriction and myocardial infarction), and human heart specimens from HF patients and healthy controls.

Intervention

Genetic manipulation of IRF7 (knockdown, overexpression, targeted deletion), genetic deletion of HK1, and pharmacological inhibition of HK1.

Comparator

Wild-type mice, empty vector controls, vehicle controls, and healthy human heart specimens.

Outcome

Cardiac fibrosis and heart function (LV EF, LV FS).surrogate

The IRF7-HK1 axis drives cardiac fibrosis via histone lactylation, and its targeted inhibition represents a potential therapeutic strategy for heart failure.

Limitations

Rodent models may not fully recapitulate the pathogenesis of chronic heart failure that develops over decades in humans.
Transcription factors like IRF7 are traditionally challenging targets for drug development.
The relatively small sample size of human heart failure specimens used for validation introduces uncertainty.

Discussion

No takes yet. Share an insight, caveat, or question.

Implication

Suggests IRF7-HK1 as antifibrotic target in mouse HF; leaves open clinical translation pending human studies.

Cite This Study

Kong et al. (2026) studied Cardiac fibrosis and heart failure. IRF7 overexpression or HK1 inhibition vs. Control (Empty vector or vehicle) was evaluated on Cardiac fibrosis and heart function. Targeting the IRF7-HK1 axis through IRF7 overexpression or HK1 inhibition attenuated cardiac fibrosis and preserved heart function in mouse models of heart failure.

synapsesocial.com/papers/6a1145e548a409a3a49df6f4 https://doi.org/10.1038/s44321-026-00444-2

Topics

Molecular Mechanisms of Cardiac Remodeling HFrEF treatment Heart failure

View Full Paper

Ask AI

Bookmark

IRF7 links HK1-dependent histone lactylation to fibroblast activation and cardiac fibrosis

Key Points

Structured PICO

Limitations

Discussion

Implication

Cite This Study

Topics

IRF7 links HK1-dependent histone lactylation to fibroblast activation and cardiac fibrosis

Key Points

Structured PICO

Limitations

Discussion

Implication

Cite This Study

Also Consider

Topics

Also Consider