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Related Concept Videos

Structure of Cardiac Muscles01:13

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Cardiac muscle, or myocardium, is a specialized type of muscle found exclusively in the heart. Its unique structural and functional characteristics enable the heart to perform its vital role of pumping blood throughout the body continuously and rhythmically. The cardiac muscle cells, or cardiomyocytes, possess an endomysium and perimysium but do not have an epimysium.
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En Face Endocardial Cushion Preparation for Planar Morphogenesis Analysis in Mouse Embryos
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Published on: July 27, 2022

Telocytes in endocardium: electron microscope evidence.

Mihaela Gherghiceanu1, C G Manole, L M Popescu

  • 1Victor Babeüs National Institute of Pathology, Bucharest, Romania.

Journal of Cellular and Molecular Medicine
|August 19, 2010
PubMed
Summary
This summary is machine-generated.

Telocytes, distinct cells with unique prolongations called telopodes, were identified in mouse endocardium. These cells may play a crucial role in the blood-myocardium barrier function.

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Area of Science:

  • Cardiovascular Biology
  • Cell Biology
  • Histology

Background:

  • Telocytes, previously known as Interstitial Cajal-Like Cells (ICLC), are distinct interstitial cells.
  • Telocytes are characterized by unique, extremely long, thin prolongations called telopodes.
  • Previous studies documented telocytes in the epicardium and myocardium.

Purpose of the Study:

  • To investigate the presence and ultrastructure of telocytes in the mouse endocardium.
  • To elucidate the spatial relationship of endocardial telocytes with surrounding cardiac structures.

Main Methods:

  • Electron microscopy was employed to visualize telocytes and their telopodes in the mouse endocardium.
  • High-resolution imaging allowed detailed examination of cellular morphology and tissue architecture.

Main Results:

  • Electron microscopy confirmed the existence of telocytes with characteristic telopodes in the subendothelial layer of the mouse endocardium.
  • Telopodes were observed interposed between the endocardial endothelium and cardiomyocytes, and some penetrated among cardiomyocytes.
  • Telopodes frequently exhibited close proximity to myocardial blood capillaries and nerve endings.

Conclusions:

  • Telocytes are a significant cell population within the mouse endocardial subendothelial layer.
  • The anatomical position and extensive telopode network suggest a potential role for endocardial telocytes in regulating the blood-myocardium barrier.
  • Further research is warranted to fully understand the functional implications of telocytes in cardiac physiology and pathology.