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Related Concept Videos

Overview of Regeneration and Repair01:19

Overview of Regeneration and Repair

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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...
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Development of the Heart01:27

Development of the Heart

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The development of the human heart, a crucial organ, commences from the mesoderm on the 18th or 19th day after fertilization. This process initiates in the cardiogenic area, a group of mesodermal cells at the embryo's head end, which evolves into elongated strands known as cardiogenic cords. These cords undergo a transformation to form hollow-centered endocardial tubes.
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Whole Body Regeneration01:33

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Regeneration is the process of restoring injured or lost tissues, organs, or body parts. While simpler organisms generally show greater ability to regenerate their whole body, few complex animals show similarly exceptional regeneration. For example, planarian flatworms have a unique regenerative potential making them a popular study organism among biologists to understand the mechanisms of whole body regeneration. Other organisms, such as hydra, also show extreme regeneration potential;...
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Overview of the Heart01:07

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The heart, a muscular organ located in the chest, functions as the body's pump, circulating blood through the vascular system. It has four chambers: two atria on top and two ventricles below. The right atrium receives deoxygenated blood from the body and passes it to the right ventricle, which pumps it to the lungs for oxygenation. The left atrium receives oxygenated blood from the lungs and transfers it to the left ventricle, which pumps it to the rest of the body.
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Liver Regeneration01:24

Liver Regeneration

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The liver is an important organ in vertebrates that plays an essential role in metabolism. It is also responsible for storing and redistributing nutrients such as carbohydrates, fats, and vitamins in the body. Additionally, the liver releases bile salts which are critical for digesting food and eliminating toxic metabolites from the body.
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Pathophysiology of Heart Failure01:17

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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...
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Intrathoracic Injection for the Study of Adult Zebrafish Heart
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Heart development and regeneration-a multi-organ effort.

Alessandro Filosa1, Suphansa Sawamiphak1,2

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Area of Science:

  • Cardiovascular Biology
  • Regenerative Medicine
  • Systems Biology

Background:

  • Heart development and homeostasis rely on interactions between cardiac tissue and distant organs like the brain, lymphoid organs, and gut.
  • These organs communicate via paracrine signals, influencing cardiac function and response to injury.
  • The heart's limited regenerative capacity, often resulting in fibrotic scarring after ischemic injury, contrasts with scarless repair observed in some animal models.

Purpose of the Study:

  • To provide an overview of inter-organ signals involved in heart development and regeneration.
  • To highlight recent findings and identify outstanding questions in the field of inter-organ communication and cardiac repair.
  • To explore the therapeutic potential of modulating inter-organ interactions for cardiac conditions.

Main Methods:

  • Review of existing literature on inter-organ signaling in cardiac development and regeneration.
  • Analysis of findings from animal models demonstrating scarless cardiac repair.
  • Synthesis of current knowledge on molecular signals mediating communication between the heart and other organ systems.

Main Results:

  • Inter-organ communication, involving signals from the brain, lymphoid organs, and gut, is crucial for heart development and homeostasis.
  • Long-range molecular signals, not just intrinsic cardiac factors, are essential for the heart's regenerative potential.
  • Animal models capable of scarless repair underscore the importance of systemic influences on cardiac regeneration.

Conclusions:

  • Inter-organ signaling plays a vital role in both the development and the regenerative capacity of the heart.
  • Understanding these systemic interactions is key to addressing the heart's limited ability to repair itself after injury.
  • Targeting inter-organ communication pathways offers promising therapeutic strategies for cardiovascular diseases.