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Related Experiment Videos

[Matrix vesicles in various "elastic" organs]

S Nikolov, M Gabrovska

    Acta Anatomica
    |January 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Matrix vesicles (MV) are key during early development in elastic tissues. These structures, appearing before birth and in early postnatal life, aid in tissue adaptation and growth.

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    Area of Science:

    • Vascular biology
    • Developmental biology
    • Connective tissue research

    Context:

    • Matrix vesicles (MV) are observed during the normal development of aorta, pulmonary trunk, and elastic cartilage in mammals.
    • MV exhibit morphological variability, categorized into dense osmiophilic (extracellular lysosomes) and electron-translucent types.
    • These vesicles are primarily located in subendothelial regions, border zones of vessel walls, and near the perichondrium in elastic cartilage.

    Purpose:

    • To investigate the presence, localization, and potential origin of matrix vesicles during the ontogenesis of elastic tissues.
    • To understand the role of matrix vesicles in the adaptation of elastic tissues in major blood vessels and cartilage.

    Summary:

    • Matrix vesicles appear shortly before birth and significantly during the first 20-60 days of postnatal life.

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  • Their formation may involve exocytosis and fragmentation (Mikroapokrinie) from endothelial cells, smooth muscle cells, fibrocytes, and chondrocytes.
  • MV are found at sites of high functional demand, interacting with elastic fibers and potentially penetrating elastic membranes.

    • Impact:

    • Matrix vesicles are proposed as a substrate for extracellular adaptive mechanisms in the developing elastic tissues of aorta, pulmonary trunk, and ear cartilage.
    • This research provides insights into the early developmental processes and adaptive strategies of elastic tissues.