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Related Concept Videos

Conduction System of the Heart01:20

Conduction System of the Heart

The cardiac conduction system produces and transmits electrical impulses that prompt myocardial contraction, ensuring efficient heart function. This intricate system ensures that the heart beats in a coordinated and efficient manner, beginning with the atria and then the ventricles. The conduction system optimizes cardiac output by maintaining this precise sequence, which is crucial for adequate blood circulation.
This system relies on the unique properties of nodal and Purkinje cells:...
Conduction System of the Heart01:19

Conduction System of the Heart

Autorhythmicity is a term that refers to the heart's inherent ability to generate electrical signals and instigate muscle contractions. This self-regulating conduction system within the heart consists of two key components: the pacemaker cells and specialized conducting cells.
The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
iPS Cell Differentiation01:22

iPS Cell Differentiation

The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
Source And Potency Of Stem Cells01:27

Source And Potency Of Stem Cells

Stem cells are undifferentiated cells with extensive self-renewal properties that help them maintain their population during the fetal and adult stages of life. They can specialize in all cell types of the human body. However, their differential potential may vary and can be classified into five types. Stem cells can be (1) Totipotent, (2) Pluripotent, (3) Multipotent, (4) Oligopotent, and (5) Unipotent. Each stem cell has a specific origin; the fertilized egg or zygote is a totipotent cell and...
Multipotency of Hematopoietic Stem Cells01:19

Multipotency of Hematopoietic Stem Cells

The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...
Stem Cell Culture01:17

Stem Cell Culture

Stem cell research aims to find ways to use stem cells to regenerate and repair cellular damage. Over time, most adult cells undergo the wear and tear of aging and lose their ability to divide and repair themselves. Stem cells do not display a particular morphology or function. Adult stem cells, which exist as a small subset of cells in most tissues, keep dividing and can differentiate into a number of specialized cells generally formed by that tissue. These cells enable the body to renew and...

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In Vitro Differentiation of Human Mesenchymal Stem Cells into Functional Cardiomyocyte-like Cells
09:05

In Vitro Differentiation of Human Mesenchymal Stem Cells into Functional Cardiomyocyte-like Cells

Published on: August 9, 2017

Cardiac stem cells differentiate into sinus node-like cells.

Jun Zhang1, Congxin Huang, Pan Wu

  • 1Department of Cardiology, Renmin Hospital and Cardiovascular Research Institute of Wuhan University, 238 Jiefang Road, Wuchang, Wuhan, People's Republic of China.

The Tohoku Journal of Experimental Medicine
|September 30, 2010
PubMed
Summary
This summary is machine-generated.

Cardiac stem cells (CSCs) can self-renew and differentiate into various cell types, including potential pacemaker cells. This research suggests c-kit(+) CSCs are promising for treating bradycardia and understanding pacemaker function.

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Area of Science:

  • Regenerative Medicine
  • Cardiovascular Biology
  • Stem Cell Research

Background:

  • Stem cell therapy offers hope for restoring lost cardiac pacemaker cells.
  • The differentiation potential of cardiac stem cells (CSCs) into pacemaker cells remains largely unexplored.

Purpose of the Study:

  • To investigate if juvenile large mammal hearts harbor cardiac stem cells (CSCs) suitable for cardiac pacemaker cell restoration.
  • To determine the differentiation capacity of c-kit(+) CSCs.

Main Methods:

  • Isolation and culture of c-kit(+) CSCs from one-month-old mongrel dogs.
  • Assessment of CSC self-renewal and proliferation via clonal expansion.
  • Evaluation of differentiation into cardiac muscle, smooth muscle, and endothelial cells using specific markers (cardiac troponin I, smooth muscle actin, CD31).
  • Analysis of gene expression for cardiac transcription factor GATA-4 and pacing-related genes (HCN2, HCN4).
  • Electrophysiological assessment of inward currents in differentiated CSCs.

Main Results:

  • CSCs demonstrated self-renewal and clonal proliferation.
  • Significant differentiation rates into cardiac muscle (23.2 ± 3.6%), smooth muscle (25.9 ± 6.6%), and endothelial cells (28.3 ± 6.1%) by week 8.
  • Expression of GATA-4 after week 2 and HCN2/HCN4 pacing genes after week 4.
  • Presence of inward currents in a fraction of CSC-derived cells, indicating functional ion channel expression.

Conclusions:

  • c-kit(+) CSCs can differentiate into cardiac muscle cells and sinus node-like cells.
  • These findings suggest CSCs hold potential as seed cells for treating sinus bradycardia disorders.
  • CSCs may also be valuable tools for exploring the mechanisms underlying pacemaker activity.