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NLRP3 Promotes Diabetic Bladder Dysfunction and Changes in Symptom-Specific Bladder Innervation.

Francis M Hughes1,2, Nathan A Hirshman3, Brian M Inouye3

  • 1Department of Surgery, Division of Urology, Duke University Medical Center, Durham, NC monty.hughes@duke.edu.

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Summary
This summary is machine-generated.

The NLRP3 inflammasome contributes to diabetic bladder dysfunction by sensing metabolites and altering nerve function. Blocking NLRP3 in diabetic mice reduced inflammation and improved bladder function.

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Area of Science:

  • Immunology
  • Urology
  • Neuroscience

Background:

  • The NLRP3 inflammasome senses diabetic metabolites, contributing to inflammation in diabetic complications.
  • Diabetic bladder dysfunction (DBD) is prevalent, yet NLRP3's role remains unstudied.

Purpose of the Study:

  • To investigate the role of NLRP3 inflammasome in diabetic bladder dysfunction.
  • To explore NLRP3's impact on bladder innervation and function in diabetes.

Main Methods:

  • In vitro activation of NLRP3 by diabetic metabolites in urothelial cells.
  • In vivo studies using genetic type 1 diabetic mice (Akita) and NLRP3 knockout models.
  • Cystometry and bladder innervation analysis.

Main Results:

  • Diabetic metabolites activate NLRP3 in primary urothelial cells.
  • NLRP3 is activated in diabetic mouse bladders, leading to inflammation and DBD markers.
  • Blocking NLRP3 ameliorated bladder inflammation and cystometric abnormalities.
  • NLRP3 activation decreased nerve density and Aδ-fibers, increasing C-fibers, potentially explaining sensory and overactivity symptoms.

Conclusions:

  • NLRP3 inflammasome plays a key role in the development of diabetic bladder dysfunction.
  • NLRP3-mediated neuronal changes contribute to specific DBD symptoms like reduced bladder fullness sensation and overactivity.