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Vascular and mesenchymal factors during heart development: a chronological study
I D Marinaş1, Raluca Marinaş, Ionica Pirici
1Cardiology Center, Craiova, Romania. ionel_marinas@yahoo.com
Summary
This study analyzes vascular and cytoskeletal factors in early human heart development. It reveals key protein expressions like CD105, CD31, alpha-SMA, desmin, and vimentin during crucial developmental stages.
Area of Science:
- Developmental Biology
- Cardiovascular Research
- Human Embryology
Background:
- Human heart development is incompletely understood.
- Congenital heart defects contribute significantly to infant morbidity and mortality.
Purpose of the Study:
- To analyze vascular and cytoskeletal factor distribution during early human heart development.
- To investigate the expression patterns of CD105, CD31, alpha-SMA, vimentin, and desmin.
Main Methods:
- Examined sequential normal human heart tissues (5-33 weeks gestational age).
- Utilized single immunohistochemistry and double immunofluorescence techniques.
- Investigated the spatial and temporal distribution of specific protein markers.
Main Results:
- CD105 expression observed in endocardium by 5 weeks, with vessel formation by 9-10 weeks.
- CD31 present diffusely in myocardium at 5 weeks, with endocardial/vascular positivity from 7 weeks.
- Cardiomyocytes showed alpha-SMA positivity (9-20 weeks) with sarcomere formation; desmin appeared at 9 weeks, adopting adult pattern by 17 weeks.
- Vimentin was present in mesenchymal cells, with perivascular localization at later stages.
Conclusions:
- Provides a comprehensive description of vascular, muscular, and mesenchymal factor development in the human heart.
- Offers novel insights into the timeline of key protein expression during early cardiogenesis.
- Establishes a foundational dataset for understanding normal heart development and potential abnormalities.
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