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Modification with CREKA Improves Cell Retention in a Rat Model of Myocardial Ischemia Reperfusion

Jing Chen1, Yanan Song1, Zheyong Huang1

  • 1Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, Shanghai, People's Republic of China.

Stem Cells (Dayton, Ohio)
|February 20, 2019
PubMed

Insights

Modified stem cells using the CREKA homing peptide show improved targeting to injured heart tissue. This fibrin-targeting approach enhances cell accumulation, leading to better cardiac repair and functional recovery.

Area of Science:

  • Regenerative Medicine
  • Biomedical Engineering
  • Cardiovascular Research

Background:

  • Poor homing of transplanted cells limits cardiac cellular therapy efficacy.
  • The homing peptide CREKA (cysteine-arginine-glutamic acid-lysine-alanine) effectively targets fibrin, a key component in tissue injury repair.

Purpose of the Study:

  • To assess if CREKA-modified stem cells exhibit enhanced fibrin-mediated homing to injured myocardium.
  • To determine if this enhanced homing improves functional recovery and structural preservation in a rat myocardial injury model.

Main Methods:

  • Mesenchymal stem cells (MSCs) were modified with CREKA via membrane fusion with CREKA-liposomes (CREKA-MSCs).
  • In vitro and in vivo studies evaluated the fibrin-targeting ability and myocardial accumulation of CREKA-MSCs.
  • Functional recovery and structural preservation were assessed in a rat myocardial injury model.

Main Results:

  • In vitro, CREKA significantly enhanced MSCs' binding to fibrin clots under static (2.6-fold) and flow (2.3-fold) conditions.
  • In vivo, CREKA-MSCs demonstrated 6.5-fold higher accumulation in injured rat myocardium compared to unmodified MSCs one day post-administration.
  • Enhanced cell homing resulted in improved structural preservation and functional recovery of the injured heart.

Conclusions:

  • Fibrin is a viable target for enhancing transplanted cell homing to injured myocardium.
  • CREKA-modified stem cells offer a promising strategy for improving cardiac cellular therapy outcomes.
  • The fibrin-targeting delivery system represents a potentially universal platform technology for regenerative medicine.

Keywords:
CREKAFibrinMesenchymal stem cellsMyocardial ischemia-reperfusionTargeting delivery

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