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Related Experiment Videos

Innervation and connexin isoform expression during diabetes-related bladder dysfunction: early structural vs.

D P Poladia1, B Schanbacher, L J Wallace

  • 1Center for Developmental Pharmacology and Toxicology, Columbus Children's Research Institute (W303), 700 Children's Drive, Columbus, OH 43205, USA.

Acta Diabetologica
|November 1, 2005
PubMed
Summary

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Diabetes mellitus causes urinary bladder dysfunction by altering nerve function. Early changes in sympathetic/parasympathetic nerves and gap junction proteins occur in diabetic rats, suggesting a role in bladder remodeling.

Area of Science:

  • Urology
  • Neuroscience
  • Endocrinology

Background:

  • Diabetes mellitus frequently leads to urinary bladder dysfunction.
  • This dysfunction is linked to neurological alterations, including autonomic and peripheral neuropathy.
  • The precise mechanisms underlying diabetes-related neurological injury and bladder dysfunction remain unclear.

Purpose of the Study:

  • To investigate the changes in sympathetic and parasympathetic nerve prevalence in a rat model of diabetes-induced bladder dysfunction.
  • To examine the expression patterns of connexin isoforms (gap junction proteins) during the development of diabetic bladder dysfunction.

Main Methods:

  • Utilized a streptozotocin-induced rat model of diabetes.
  • Employed immunohistochemistry to detect tyrosine hydroxylase (sympathetic marker) and vesicular acetylcholine transporter (parasympathetic marker).

Related Experiment Videos

  • Analyzed connexin isoform expression (connexin 43, 32, and 26) using digital image analysis.

    • Main Results:

    • Diabetic rats showed increased sympathetic innervation (tyrosine hydroxylase) and decreased parasympathetic innervation (vesicular acetylcholine transporter) in the bladder smooth muscle.
    • Significant, time-dependent decreases in connexin 43 were observed.
    • Transient increases in connexin 32 and 26 were noted in diabetic rats compared to controls.

    Conclusions:

    • Altered sympathetic and parasympathetic innervation are early events in diabetes-related bladder dysfunction.
    • Selective and time-dependent changes in connexin isoform expression are associated with diabetic bladder remodeling.
    • These findings provide insights into the pathogenesis of diabetic cystopathy.