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Multiple complexes in human spermatocytes.

A J Solari, O Vilar

    Chromosoma
    |May 16, 1978
    PubMed
    Summary
    This summary is machine-generated.

    During human spermatocyte meiosis I, multiple complexes form from synaptonemal complex fragments. These cytoplasmic bodies persist through telophase I but are not seen in the second meiotic division.

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    Area of Science:

    • Cell Biology
    • Reproductive Biology
    • Genetics

    Background:

    • During meiosis I in human spermatocytes, complex structures form.
    • These structures, termed multiple complexes, originate from synaptonemal complexes (SCs).

    Purpose of the Study:

    • To investigate the formation, composition, and fate of multiple complexes during human spermatogenesis.

    Main Methods:

    • Light microscopy and ultrastructural analysis of human spermatocytes during meiosis I and II.

    Main Results:

    • Multiple complexes, approximately 1 micron in diameter, form from SC fragments during prometaphase I.
    • These complexes consist of tripartite units and a dense matrix, with central elements measuring 1-3 microns.
    • Multiple complexes are observed as cytoplasmic bodies in telophase I and interphase of secondary spermatocytes but disappear after meiosis II.

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    Conclusions:

    • Multiple complexes are transient structures in human spermatogenesis, originating from SCs during meiosis I.
    • Their lack of microtubular attachment suggests passive movement within the cell.
    • These findings contribute to understanding the dynamics of chromosomal structures during male meiosis.