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Eukaryotic cells have different motor proteins for transporting various cargo within the cell. These motor proteins differ based on the filament they associate with, the direction they move within the cell, and the type of cargo they transport. Motor proteins that associate with microtubules are known as microtubule-associated motor proteins. There are two families of microtubule-associated motor proteins —Kinesins and Dyneins. Both these proteins assist in the transport of cellular...
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In eukaryotic cells,  cytoskeletal filaments such as actin, microtubules, and intermediate filaments form a mesh-like cytoskeletal network. These filaments serve as tracks for transporting cellular cargo. Specialized motor proteins use the chemical energy stored in adenosine triphosphate (ATP) for this transport. During interphase, microtubules are polarized, with the plus-end towards the cell periphery and the minus-end towards the cell center. Two microtubule-associated motor proteins,...
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The myelin sheath is a multilayered lipid and protein covering that insulates the axon of a neuron, enhancing the speed of nerve impulse conduction. Axons without this sheath are referred to as unmyelinated. Two types of neuroglia, Schwann cells in the peripheral nervous system (PNS) and oligodendrocytes in the central nervous system (CNS) are responsible for producing myelin sheaths.
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The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
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Measuring Axonal Cargo Transport in Mouse Primary Cortical Cultured Neurons
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CNS myelination requires cytoplasmic dynein function.

Michele L Yang, Jimann Shin, Christina A Kearns

    Developmental Dynamics : an Official Publication of the American Association of Anatomists
    |December 10, 2014
    PubMed
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    Cytoplasmic dynein, crucial for cell transport, is newly found to be essential for oligodendrocyte myelination in the central nervous system. This discovery expands its known roles in neural development.

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    Area of Science:

    • Neuroscience
    • Cell Biology
    • Molecular Motors

    Background:

    • Cytoplasmic dynein is the primary motor for minus-end-directed microtubule transport.
    • It plays vital roles in CNS development, including neuronal migration and axonal transport.
    • DYNC1H1 mutations are linked to brain malformations and axonal issues.

    Purpose of the Study:

    • To investigate the role of cytoplasmic dynein in oligodendrocyte function and myelination.
    • To determine if cytoplasmic dynein is required for the ensheathment of axons by oligodendrocytes.

    Main Methods:

    • Forward genetic screen in zebrafish to identify mutations affecting oligodendrocytes.
    • In vivo imaging to observe oligodendrocyte behavior and axon ensheathment.
    • Gene expression analysis to assess myelin-related gene regulation.

    Main Results:

    • A mutation in zebrafish dync1h1 resulted in a significant deficit of oligodendrocytes.
    • In vivo imaging demonstrated that dync1h1 is crucial for proper axon ensheathment.
    • Gene expression data indicated that dync1h1 promotes myelin gene expression.

    Conclusions:

    • Cytoplasmic dynein is essential for oligodendrocyte development and function.
    • Beyond its known roles, cytoplasmic dynein actively promotes myelination in the CNS.
    • This highlights a novel contribution of cytoplasmic dynein to neural development.