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Related Experiment Videos

Morphophysiological correlation of boar Leydig cell development during postnatal stage.

J Herrera, M Sosa, F Ayala

    The Cornell Veterinarian
    |January 1, 1983
    PubMed
    Summary

    Leydig cell morphology and ultrastructure correlate with steroidogenic activity in boar testes. Steroid levels (androstenedione, testosterone, DHT) change with age, impacting reproductive development.

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    Area of Science:

    • Reproductive Biology
    • Endocrinology
    • Histology

    Background:

    • Leydig cells are crucial for testosterone production in the testes.
    • Understanding Leydig cell development and function is vital for male reproductive health.
    • Boar testes undergo significant morphological and functional changes during postnatal development.

    Purpose of the Study:

    • To investigate the relationship between Leydig cell morphology/ultrastructure and their steroidogenic activity in boars of varying ages.
    • To quantify steroid levels (androstenedione, testosterone, DHT) and correlate them with Leydig cell characteristics.

    Main Methods:

    • Testes from Yorkshire boars aged 8-100 days were analyzed.
    • Light and transmission electron microscopy were used to study Leydig cell morphology.

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  • Quantitative analysis of total proteins and steroid metabolic pools (A, T, DHT) was performed.

    • Main Results:

    • Leydig cells showed hyperplasia from 14-40 days, followed by a decrease in size and number.
    • A well-developed smooth endoplasmic reticulum was observed in Leydig cells from postnatal day 8.
    • Testosterone and androstenedione levels decreased significantly from 8-28 days, while DHT remained low throughout.

    Conclusions:

    • Leydig cell morphology and ultrastructure are closely linked to their steroidogenic capacity during boar development.
    • Age-related changes in Leydig cells influence the production of androgens, impacting spermatogenesis onset.