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Vasoactive intestinal polypeptide in the hyper-reflexic neuropathic bladder.

R B Kinder, J M Restorick, A R Mundy

    British Journal of Urology
    |June 1, 1985
    PubMed
    Summary
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    Neuropathic bladder with detrusor hyper-reflexia shows fewer vasoactive intestinal polypeptide (VIP) nerves and lower VIP levels. This suggests VIP nerve changes may contribute to bladder dysfunction in these patients.

    Area of Science:

    • Urology
    • Neuroscience
    • Gastroenterology

    Background:

    • Detrusor hyper-reflexia is a condition characterized by involuntary bladder contractions.
    • Vasoactive intestinal polypeptide (VIP) is a neuropeptide implicated in bladder function.
    • Neuropathic bladder conditions can lead to significant urinary dysfunction.

    Purpose of the Study:

    • To investigate the distribution and concentration of VIP-containing nerves in hyper-reflexic neuropathic bladders.
    • To compare VIP nerve findings in patients with detrusor hyper-reflexia to those without bladder abnormalities.

    Main Methods:

    • Immunocytochemistry was used to visualize VIP immunoreactive nerves.
    • Radioimmunoassay was employed to quantify VIP concentration.
    • Bladder biopsy specimens from 21 patients with detrusor hyper-reflexia and 20 controls were analyzed.

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    Main Results:

    • A significant reduction in the number of VIP immunoreactive nerves was observed in hyper-reflexic bladders.
    • VIP concentration was also found to be significantly lower in the neuropathic bladder samples.
    • These changes were statistically significant when compared to control samples.

    Conclusions:

    • The study indicates a depletion of VIP-containing nerves in hyper-reflexic neuropathic bladders.
    • Reduced VIP may play a role in the pathophysiology of detrusor hyper-reflexia.
    • Further research is warranted to explore therapeutic strategies targeting VIP in bladder dysfunction.