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Related Experiment Videos

Normal and abnormal mineralization in mammals

H C Anderson

    Transactions - American Society for Artificial Internal Organs
    |January 1, 1981
    PubMed
    Summary

    Cellular matrix vesicles initiate biological mineralization by forming apatite. Extracellular factors then regulate this process, controlling crystal growth in bone, cartilage, and dentin formation.

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    Area of Science:

    • Biomineralization
    • Cell Biology
    • Biochemistry

    Background:

    • Cells, including osteoblasts, chondrocytes, and odontoblasts, are critical for mineralizing bone, cartilage, and dentin.
    • Calcification initiates within matrix vesicles, which are extracellular particles released by cells.

    Purpose of the Study:

    • To elucidate the two-phase process of biological mineralization.
    • To integrate the roles of matrix vesicles and extracellular factors in biomineralization.

    Main Methods:

    • In vitro studies using cartilage slices and isolated matrix vesicles.
    • Analysis of cellular and extracellular components involved in calcification.

    Main Results:

    • Matrix vesicles contain calcifiable lipids and phosphatases, essential for initiating apatite formation.
    • Extracellular matrix components like collagen, proteoglycans, and phosphoproteins regulate crystal proliferation and growth.

    Conclusions:

    • Biological mineralization is a two-phase process involving initiation by matrix vesicles and regulation by extracellular factors.
    • Understanding these phases provides a comprehensive concept of biomineralization in skeletal tissues.

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