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An Injectable and Drug-loaded Supramolecular Hydrogel for Local Catheter Injection into the Pig Heart
Published on: June 7, 2015
Functionalised peptide hydrogel for the delivery of cardiac progenitor cells
K A Burgess1, C Frati2, K Meade3
1Department of Materials, The University of Manchester, Oxford Road, Manchester M13 9PL, UK; Manchester Institute of Biotechnology, The University of Manchester, Oxford Road, Manchester M13 9PL, UK.
Insights
This study introduces a novel peptide hydrogel for delivering cardiac progenitor cells (CPCs) to repair hearts after myocardial infarction (MI). The hydrogel improved cell retention and reduced heart damage, offering a promising cell therapy for heart failure.
Area of Science:
- Regenerative Medicine
- Biomaterials Science
- Cardiovascular Biology
Background:
- Heart failure (HF) is a major global cause of death, often following myocardial infarction (MI).
- Limited cardiomyocyte proliferation restricts natural heart regeneration after MI.
- Effective cell delivery and retention are critical challenges for cardiac cell therapies.
Purpose of the Study:
- To evaluate an injectable, RGDSP-functionalized self-assembling peptide hydrogel (FEFEFKFK) as a scaffold for cardiac progenitor cell (CPC) delivery.
- To assess the hydrogel's ability to promote CPC retention and cardiac repair post-MI.
- To investigate the impact of CPC-loaded hydrogel on myocardial damage and cardiac function.
Main Methods:
- Culturing rat cardiac progenitor cells (CPCs) within the FEFEFKFK peptide hydrogel in vitro.
- Injecting the hydrogel alone or loaded with CPCs into rat hearts following induced injury.
- Assessing myocardial damage, left ventricular dilation, and cell retention post-injection.
Main Results:
- In vitro culture within the hydrogel promoted spontaneous CPC differentiation into adult cardiac phenotypes.
- Hydrogel injection, with or without CPCs, significantly reduced myocardial damage.
- Treatment led to a significant decrease in left ventricular dilation after injury.
Conclusions:
- The RGDSP-functionalized peptide hydrogel serves as an effective scaffold for CPC delivery and retention.
- This cell-based therapy shows potential for promoting cardiac regeneration and improving outcomes after myocardial infarction.
- The developed hydrogel system offers a promising strategy to address challenges in cell therapy for heart failure.
Abstract:
Heart failure (HF) remains one of the leading causes of death worldwide; most commonly developing after myocardial infarction (MI). Since adult cardiomyocytes characteristically do not proliferate, cells lost during MI are not replaced. As a result, the heart has a limited regenerative capacity. There is, therefore, a need to develop novel cell-based therapies to promote the regeneration of the heart after MI. The delivery and retention of cells at the injury site remains a significant challenge. In this context, we explored the potential of using an injectable, RGDSP-functionalised self-assembling peptide - FEFEFKFK - hydrogel as scaffold for the delivery and retention of rat cardiac progenitor cells (CPCs) into the heart. Our results show that culturing CPCs in vitro within the hydrogel for one-week promoted their spontaneous differentiation towards adult cardiac phenotypes. Injection of the hydrogel on its own, or loaded with CPCs, into the rat after injury resulted in a significant reduction in myocardial damage and left ventricular dilation.
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