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Related Concept Videos

Pathophysiology of Cardiac Performance01:29

Pathophysiology of Cardiac Performance

Typical heart performance is influenced by heart rate, rhythm, myocardial contraction, and metabolism or blood flow. The cardiac muscle exhibits distinct electrophysiological features, including pacemaker activity and calcium channel control, which play a vital role in the heart's response to various drugs. The autonomic nervous system, comprising the sympathetic and parasympathetic branches, regulates heart rate. Sympathetic activation increases heart rate, while parasympathetic activation...
Pathophysiology of Heart Failure01:17

Pathophysiology of Heart Failure

Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
Heart Failure II: Pathophysiology01:29

Heart Failure II: Pathophysiology

Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...
Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
Overview of Regeneration and Repair01:19

Overview of Regeneration and Repair

Regeneration and repair processes are critical in healing damages caused by injury, disease, and aging. In regeneration, the damaged tissue is entirely replaced with new growth that restores the original architecture and function. In contrast, tissue repair usually results in a fixed tissue architecture involving scar formation. Scars generally do not reestablish tissue function and may also exhibit structural abnormalities at the injury site.
Regeneration
All animals have varying degrees of...
Stem Cell Therapy for Tissue Regeneration01:21

Stem Cell Therapy for Tissue Regeneration

Stem cell therapy is a method used in regenerative medicine to repair and restore function to damaged tissues and organs. Stem cells have the potential to proliferate and differentiate into various tissue types, making them ideal candidates for tissue regeneration. For example, hematopoietic stem cell transplants are commonly used in blood cancer treatment to replenish damaged bone marrow and restore healthy blood cells.
Types of Stem Cells used in Stem Cell Therapy
The two main cell types that...

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Suppression of Pro-fibrotic Signaling Potentiates Factor-mediated Reprogramming of Mouse Embryonic Fibroblasts into Induced Cardiomyocytes
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Cardiac regenerative capacity and mechanisms.

Kazu Kikuchi1, Kenneth D Poss

  • 1Developmental and Stem Cell Biology Division, Victor Chang Cardiac Research Institute, Darlinghurst, New South Wales 2010, Australia. k.kikuchi@victorchang.edu.au

Annual Review of Cell and Developmental Biology
|October 13, 2012
PubMed
Summary

Mammals cannot regenerate heart muscle after injury, unlike zebrafish. Understanding natural heart regeneration mechanisms may lead to therapies for heart failure in humans.

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Suppression of Pro-fibrotic Signaling Potentiates Factor-mediated Reprogramming of Mouse Embryonic Fibroblasts into Induced Cardiomyocytes
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Area of Science:

  • Cardiovascular Biology
  • Regenerative Medicine
  • Comparative Physiology

Background:

  • Mammalian hearts have limited capacity for repairing injury-induced muscle loss.
  • This limitation contributes to heart failure, a significant global health issue.
  • Zebrafish exhibit remarkable natural heart regeneration capabilities.

Purpose of the Study:

  • To review recent discoveries in cardiac regenerative capacity.
  • To explore how natural heart regeneration mechanisms are stimulated and maintained in model systems.
  • To project future therapeutic strategies for cardiac regeneration in humans.

Main Methods:

  • Review of current scientific literature on cardiac regeneration.
  • Analysis of cellular and molecular mechanisms underlying heart regeneration in model organisms.
  • Examination of advancements in cell transplantation methodologies.

Main Results:

  • Mammals lack significant endogenous cardiac repair mechanisms.
  • Zebrafish possess robust innate heart regeneration abilities.
  • Understanding these mechanisms is key to developing new therapies.

Conclusions:

  • Therapeutic cardiac muscle regeneration in humans is a future possibility.
  • Leveraging insights from zebrafish and other models is crucial.
  • Further research into regenerative pathways can combat heart failure.