Cardiac Repair Mechanisms
Cardiac Repair Mechanisms - Related Videos
06:37
Pluripotent Stem Cell Derived Cardiac Cells for Myocardial Repair
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Cited by 13 •
2017
We present three novel and more efficient protocols for differentiating human induced pluripotent stem cells into cardiomyocytes, endothelial cells, and smooth muscle cells and a delivery method that improves the engraftment of transplanted cells by combining cell injection with patch-mediated cytokine delivery.
04:40
Creation of Cardiac Tissue Exhibiting Mechanical Integration of Spheroids Using 3D Bioprinting
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Cited by 55 •
2017
This protocol describes 3D bioprinting of cardiac tissue without the use of biomaterials. 3D bioprinted cardiac patches exhibit mechanical integration of component spheroids and are highly promising in cardiac tissue regeneration and as 3D models of heart disease.
11:51
Construction of Defined Human Engineered Cardiac Tissues to Study Mechanisms of Cardiac Cell Therapy
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Cited by 16 •
2016
This manuscript describes the creation of defined engineered cardiac tissues using surface marker expression and cell sorting. The defined tissues can then be used in a multi-tissue bioreactor to investigate mechanisms of cardiac cell therapy in order to provide a functional, yet controlled, model system of the human heart.
01:28
Mechanism of Cardiac Arrhythmias
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2024
Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
11:01
Application of Stopped-flow Kinetics Methods to Investigate the Mechanism of Action of a DNA Repair Protein
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Cited by 15 •
2010
Msh2-Msh6 is responsible for initiating repair of replication errors in DNA. Here we present a transient kinetics approach towards understanding how this critical protein works. The report illustrates stopped-flow experiments for measuring the coupled DNA binding and ATPase kinetics underlying Msh2-Msh6 mechanism of action in DNA repair.
FAQs
After injury, repair proceeds through a coordinated sequence rather than a single event. Inflammation responds to damage, extracellular matrix remodeling reshapes the tissue environment, and blood-vessel formation supports the injured region. The response may then include proliferation of surviving cardiomyocytes or activation of progenitor cells, linking early tissue stabilization with later replacement of damaged muscle.
Wnt, Notch, and Hippo-YAP provide developmental control over the repair response. Together, these pathways influence cell fate, growth, and tissue organization, determining whether cells remain in existing roles, proliferate, or contribute to rebuilt tissue. Their importance lies in connecting molecular signals with the coordinated architecture required for functional cardiac restoration, rather than simply increasing cell number.
Regenerative hearts can replace damaged tissue through proliferation of surviving cardiomyocytes or activation of progenitor cells, whereas poorly regenerating adult mammalian hearts more often substitute scar for functional muscle. This contrast makes scarring a central outcome to analyze: it reveals where repair fails to restore functional tissue and helps identify mechanisms that could shift healing toward regeneration.
The source of replacement tissue shapes the repair outcome. Surviving cardiomyocytes can proliferate, allowing existing heart muscle cells to contribute directly to restoration, while progenitor-cell activation offers a different route for replacing damaged tissue. Comparing these cellular responses helps developmental biologists examine how cell fate decisions and growth controls determine whether repair rebuilds muscle or favors scar formation.
Developmental biology provides a framework for asking how cells coordinate fate, growth, and organization during repair. Researchers can compare regenerative hearts with poorly regenerating adult mammalian hearts, then relate differences in tissue replacement to Wnt, Notch, and Hippo-YAP signaling. This approach connects injury responses with developmental programs that normally shape cardiac structure.
Studies of cardiac repair can identify why some hearts restore damaged muscle while others form scar tissue. By examining inflammation, matrix remodeling, vessel formation, cardiomyocyte proliferation, progenitor activation, and developmental signaling together, researchers can define obstacles to functional recovery. These findings guide strategies aimed at improving cardiac regeneration rather than merely limiting injury-related tissue changes.