An injectable alginate/extra cellular matrix (ECM) hydrogel towards acellular treatment of heart failure
Curley, Clive J.
Dolan, Eimear B.
Duffy, Garry P.
Murphy, Bruce P.
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Curley, Clive J., Dolan, Eimear B., Otten, Matthias, Hinderer, Svenja, Duffy, Garry P., & Murphy, Bruce P. (2019). An injectable alginate/extra cellular matrix (ECM) hydrogel towards acellular treatment of heart failure. Drug Delivery and Translational Research, 9(1), 1-13. doi: 10.1007/s13346-018-00601-2
As treatments for myocardial infarction (MI) continue to improve, the population of people suffering from heart failure (HF) is rising significantly. Novel treatment strategies aimed at achieving long-term functional stabilisation and improvement in heart function post MI include the delivery of biomaterial hydrogels and myocardial matrix-based therapies to the left ventricle wall. Individually alginate hydrogels and myocardial matrix-based therapies are at the most advanced stages of commercial/clinical development for this potential treatment option. However, despite these individual successes, the potential synergistic effect gained by combining the two therapies remains unexplored. This study serves as a translational step in evaluating the minimally invasive delivery of dual acting alginate-based hydrogels to the heart. We have successfully developed new production methods for hybrid alginate/extracellular matrix (ECM) hydrogels. We have identified that the high G block alginate/ECM hybrid hydrogel has appropriate rheological and mechanical properties (1.6 KPa storage modulus, 29 KPa compressive modulus and 14 KPa dynamic modulus at day 1) and can be delivered using a minimally invasive delivery device. Furthermore, we have determined that these novel hydrogels are not cytotoxic and are capable of enhancing the metabolic activity of dermal fibroblasts in vitro (p < 0.01). Overall these results suggest that an effective minimally invasive HF treatment option could be achieved by combining alginate and ECM particles.