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Collagen in 155 human bladders

J G Susset, D Servot-Viguier, F Lamy

    Investigative Urology
    |November 1, 1978
    PubMed
    Summary
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    Human bladder collagen content averages 57.4% of insoluble protein dry weight. Collagen levels increase significantly in females over 50, with good correlation between detrusor and trigone collagen.

    Area of Science:

    • Urology
    • Biochemistry
    • Aging Research

    Background:

    • Collagen is a key structural protein in the bladder wall.
    • Understanding age-related changes in bladder composition is crucial for geriatric urology.
    • Hydroxyproline is a reliable marker for collagen quantification.

    Purpose of the Study:

    • To quantify the percentage of collagen in the human bladder.
    • To investigate the correlation of collagen content between bladder detrusor and trigone.
    • To analyze age- and sex-related variations in bladder collagen levels.

    Main Methods:

    • Autopsy bladder specimens from 155 individuals (48 female, 107 male) were analyzed.
    • Collagen content was determined by hydroxyproline dosage, expressed as a percentage of insoluble protein dry weight.

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  • Statistical analysis was performed to assess correlations and age/sex differences.

    • Main Results:

    • The average bladder collagen percentage was 57.4% (+/- 9) of dry weight.
    • A significant positive correlation (r = 0.55) was observed between detrusor and trigone collagen content.
    • No significant differences in collagen content were found between pre- and postpuberty groups.
    • Females over 50 years of age exhibited a significant increase in bladder collagen.

    Conclusions:

    • Human bladder collagen constitutes a substantial portion of insoluble protein.
    • Age is a significant factor in bladder collagen content, particularly in postmenopausal females.
    • Collagen distribution is relatively consistent between the detrusor and trigone regions of the bladder.