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Related Experiment Video

Updated: Jul 7, 2026

Assessment of Perigenital Sensitivity and Prostatic Mast Cell Activation in a Mouse Model of Neonatal Maternal Separation
09:49

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Experimental autoimmune prostatitis induces chronic pelvic pain.

Charles N Rudick1, Anthony J Schaeffer, Praveen Thumbikat

  • 1Department of Urology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois 60611, USA.

American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
|February 22, 2008
PubMed
Summary

Chronic prostatitis (CP) and chronic pelvic pain syndrome (CPPS) involve persistent pelvic pain originating from the prostate. This study identified prostate inflammation and nerve changes as key drivers of chronic pain in a mouse model.

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Area of Science:

  • Urology
  • Pain Research
  • Immunology

Background:

  • Chronic prostatitis (CP) and chronic pelvic pain syndrome (CPPS) are characterized by debilitating pelvic pain.
  • The exact causes and mechanisms underlying CP/CPPS remain poorly understood, hindering effective treatment.
  • Understanding the origin and modulation of pelvic pain is crucial for developing targeted therapies.

Purpose of the Study:

  • To investigate the development, localization, and modulation of pelvic pain in a murine experimental autoimmune prostatitis model.
  • To correlate histopathological findings with pelvic pain development and severity.
  • To explore potential therapeutic targets for mitigating chronic pelvic pain in CP/CPPS.

Main Methods:

  • Establishment of an experimental autoimmune prostatitis model in mice.
  • Assessment of pelvic pain development and duration post-antigen instillation.
  • Pharmacological interventions (lidocaine, gabapentin) to evaluate pain origin and pathways.
  • Histopathological analysis of prostate tissue to examine inflammation and neuronal changes (Protein Gene Product 9.5 expression).

Main Results:

  • Chronic pelvic pain developed within 5 days and persisted for over 30 days in the model.
  • Pain was localized to the prostate, as indicated by attenuation with direct prostatic lidocaine treatment.
  • Prostate inflammation correlated positively with pain severity and duration.
  • Increased neuronal fiber distribution was observed specifically in the dorsolateral prostate.
  • Gabapentin treatment suggested a role for spinal and/or supraspinal pathways in chronic pain.

Conclusions:

  • Prostate inflammation and associated neuropathic changes are key contributors to chronic pelvic pain in this model.
  • The findings support the prostate as the primary source of pain in experimental autoimmune prostatitis.
  • This model provides a valuable platform for elucidating pain mechanisms and testing novel therapeutic strategies for CP/CPPS.