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Experimental acute myocardial infarction: telocytes involvement in neo-angiogenesis.

Manole CG, Cismaşiu V, Gherghiceanu M, Popescu LM - J. Cell. Mol. Med. (2011)

Bottom Line: Higher resolution images provided the following information: (a) the intercellular space between the abluminal face of endothelium and its surrounding TCs is frequently less than 50 nm; (b) TCs establish multiple direct nanocontacts with endothelial cells, where the extracellular space seems obliterated; such nanocontacts have a length of 0.4-1.5 μm; (c) the absence of basal membrane on the abluminal face of endothelial cell.Besides the physical contacts (either nanoscopic or microscopic) TCs presumably contribute to neo-angiognesis via paracrine secretion (as shown by immunocytochemistry for VEGF or NOS2).Last but not least, TCs contain measurable quantities of angiogenic microRNAs (e.g. let-7e, 10a, 21, 27b, 100, 126-3p, 130a, 143, 155, 503).

View Article: PubMed Central - PubMed

Affiliation: Department of Cellular and Molecular Medicine, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania.

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Rat experimental myocardial infarction. Border zone: 1-day-old. Transmission electron microscopy. The inflammatory granulocyte reaction dominates: granulocyte infiltration, mainly eosinophils (E) and neutrophils (PMN); a mast cell (M) is visible; the arrow indicates an apoptotic cell. A telocyte (TC) and several telopodes (Tp) are digitally blue coloured.
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fig01: Rat experimental myocardial infarction. Border zone: 1-day-old. Transmission electron microscopy. The inflammatory granulocyte reaction dominates: granulocyte infiltration, mainly eosinophils (E) and neutrophils (PMN); a mast cell (M) is visible; the arrow indicates an apoptotic cell. A telocyte (TC) and several telopodes (Tp) are digitally blue coloured.

Mentions: In all the cases the central zone and the corresponding border zone of infarction were clearly distinguishable. The lesion development corresponded to that previously described in literature. Figures 1–4 show TEM modifications of the border zone at specific intervals after LADC ligation: 1 day, 2 days, 1 week and 1 month.


Experimental acute myocardial infarction: telocytes involvement in neo-angiogenesis.

Manole CG, Cismaşiu V, Gherghiceanu M, Popescu LM - J. Cell. Mol. Med. (2011)

Rat experimental myocardial infarction. Border zone: 1-day-old. Transmission electron microscopy. The inflammatory granulocyte reaction dominates: granulocyte infiltration, mainly eosinophils (E) and neutrophils (PMN); a mast cell (M) is visible; the arrow indicates an apoptotic cell. A telocyte (TC) and several telopodes (Tp) are digitally blue coloured.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3822940&req=5

fig01: Rat experimental myocardial infarction. Border zone: 1-day-old. Transmission electron microscopy. The inflammatory granulocyte reaction dominates: granulocyte infiltration, mainly eosinophils (E) and neutrophils (PMN); a mast cell (M) is visible; the arrow indicates an apoptotic cell. A telocyte (TC) and several telopodes (Tp) are digitally blue coloured.
Mentions: In all the cases the central zone and the corresponding border zone of infarction were clearly distinguishable. The lesion development corresponded to that previously described in literature. Figures 1–4 show TEM modifications of the border zone at specific intervals after LADC ligation: 1 day, 2 days, 1 week and 1 month.

Bottom Line: Higher resolution images provided the following information: (a) the intercellular space between the abluminal face of endothelium and its surrounding TCs is frequently less than 50 nm; (b) TCs establish multiple direct nanocontacts with endothelial cells, where the extracellular space seems obliterated; such nanocontacts have a length of 0.4-1.5 μm; (c) the absence of basal membrane on the abluminal face of endothelial cell.Besides the physical contacts (either nanoscopic or microscopic) TCs presumably contribute to neo-angiognesis via paracrine secretion (as shown by immunocytochemistry for VEGF or NOS2).Last but not least, TCs contain measurable quantities of angiogenic microRNAs (e.g. let-7e, 10a, 21, 27b, 100, 126-3p, 130a, 143, 155, 503).

View Article: PubMed Central - PubMed

Affiliation: Department of Cellular and Molecular Medicine, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania.

Show MeSH
Related in: MedlinePlus