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Published on: November 26, 2018
RegenHeart: A Time-Effective, Low-Concentration, Detergent-Based Method Aiming for Conservative Decellularization of
Eleonora Dal Sasso1, Roberta Menabò2,3, Davide Agrillo1
1Cardiovascular Regenerative Medicine, Department of Cardiac Thoracic Vascular Sciences and Public Health, University of Padua, Padua 35128, Italy.
Insights
A new method efficiently decellularizes rat hearts, preserving extracellular matrix structure and bioactivity. This technique offers a promising path toward creating biocompatible cardiac tissue for heart failure patients, avoiding immunosuppression.
Area of Science:
- Regenerative Medicine
- Cardiovascular Research
- Biomaterials Science
Background:
- Heart failure is a leading cause of mortality with limited effective treatments.
- Current solutions like allogeneic heart transplantation face challenges including immunosuppression side effects and donor scarcity.
- Autologous cell-based biological cardiac substitutes from decellularized organs offer a potential lifelong, biocompatible solution.
Purpose of the Study:
- To develop and test a novel, rapid decellularization method for rat hearts.
- To minimize cytotoxic detergent exposure while preserving the cardiac extracellular matrix (ECM) architecture and bioactivity.
Main Methods:
- A new decellularization protocol using protease inhibition, antioxidation, and excitation-contraction uncoupling.
- Simultaneous perfusion/submersion modality to reduce detergent concentration and incubation time.
- Assessment of ECM preservation, macro- and microarchitecture, and bioactivity in decellularized rat hearts.
Main Results:
- The novel method significantly reduced detergent exposure time and concentration.
- Decellularized hearts exhibited well-preserved ECM macro- and microarchitecture.
- The decellularization process maintained the inherent bioactivity of the cardiac scaffold.
Conclusions:
- This innovative decellularization technique effectively preserves cardiac ECM integrity and bioactivity.
- The method represents a significant advancement for creating biological cardiac substitutes.
- It holds promise for developing advanced regenerative therapies for heart failure, potentially eliminating the need for immunosuppression.
Abstract:
Heart failure is the worst outcome of all cardiovascular diseases and still represents nowadays the leading cause of mortality with no effective clinical treatments, apart from organ transplantation with allogeneic or artificial substitutes. Although applied as the gold standard, allogeneic heart transplantation cannot be considered a permanent clinical answer because of several drawbacks, as the side effects of administered immunosuppressive therapies. For the increasing number of heart failure patients, a biological cardiac substitute based on a decellularized organ and autologous cells might be the lifelong, biocompatible solution free from the need for immunosuppression regimen. A novel decellularization method is here proposed and tested on rat hearts in order to reduce the concentration and incubation time with cytotoxic detergents needed to render acellular these organs. By protease inhibition, antioxidation, and excitation-contraction uncoupling in simultaneous perfusion/submersion modality, a strongly limited exposure to detergents was sufficient to generate very well-preserved acellular hearts with unaltered extracellular matrix macro- and microarchitecture, as well as bioactivity.
