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May 18, 2026European Heart JournalOpen Access

Granulocyte colony-stimulating factor treatment plus dipeptidylpeptidase-IV inhibition augments myocardial regeneration in mice expressing cyclin D2 in adult cardiomyocytes

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Why the study?

Stem cell mobilization and homing alone yield limited cardiomyocyte renewal post-MI, while cell cycle induction competes with rapid scar formation and adverse remodelling.

Does G-CSF plus DPP-IV inhibition improve myocardial regeneration in mice expressing cyclin D2 after myocardial infarction?

Population

Adult MHC-cycD2 transgenic mice and non-transgenic littermates with induced MI

Comparison

G-CSF plus Diprotin A vs saline

Design

Animal experimental study

Key result

G-CSF plus DPP-IV inhibition combined with cardiomyocyte cell cycle activation significantly improved myocardial regeneration and functional recovery after myocardial infarction in mice.

Authors

MZMarc‐Michael ZarubaWZWuqiang ZhuMSMark H. Soonpaa

Discussion

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Overview

May enhance post-MI regeneration via combined mobilization and cell-cycle induction; extends prior separate interventions but leaves open human translation.

Key Points

  • The study aims to determine if combining G-CSF treatment and DPP-IV inhibition with cardiomyocyte cell cycle activation increases myocardial renewal after myocardial infarction.
  • Induced myocardial infarction via coronary artery ligation in MHC-cycD2 transgenic mice and non-transgenic littermates.
  • Treated mice with saline or G-CSF plus DPP-IV inhibitor Diprotin A for 7 days.
  • Analyzed infarct thickness and cardiomyocyte counts in heart sections, along with echocardiographic assessments for functional recovery.
  • MHC-cycD2 mice treated with G-CSF plus DipA showed improved infarct thickness and increased cardiomyocyte number compared to controls.
  • Echocardiographic analyses revealed an additive effect of stem cell mobilization and cell cycle activation on functional recovery.
  • Data indicate significant enhancement of myocardial regeneration following combined G-CSF and DPP-IV inhibition.

Structured PICO

Does G-CSF plus DPP-IV inhibition improve myocardial regeneration in mice expressing cyclin D2 after myocardial infarction?

P
Population
Adult MHC-cycD2 transgenic mice (exhibiting constitutive cardiomyocyte cell cycle activity) and non-transgenic littermates with induced myocardial infarction via coronary artery ligation
I
Intervention
Granulocyte colony-stimulating factor (G-CSF) plus dipeptidylpeptidase-IV (DPP-IV) inhibitor Diprotin A (DipA) for 7 days
C
Comparator
Saline, MHC-cycD2 transgene expression alone, or G-CSF plus DipA treatment alone
O
Outcome
Infarct thickness and cardiomyocyte number/infarct/sectionsurrogate

Combining stem cell mobilization and homing with cardiomyocyte cell cycle activation additively enhances myocardial regeneration and functional recovery post-myocardial infarction in a mouse model.

Cite This Study

Zaruba et al. (2011) studied this question. G-CSF plus DPP-IV inhibition combined with cardiomyocyte cell cycle activation significantly improved myocardial regeneration and functional recovery after myocardial infarction in mice.

synapsesocial.com/papers/6a0b2de73a96fd342f4319c6https://doi.org/10.1093/eurheartj/ehr302
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