Animal Models of Hunner-Type Interstitial Cystitis

Area of Science:

• Urology
• Immunology
• Pathology

Background:

• Interstitial cystitis/bladder pain syndrome (IC/BPS) is a chronic bladder condition with undefined etiology.
• IC/BPS presents as Hunner-type IC (HIC) or bladder pain syndrome (BPS), with distinct pathologies but overlapping symptoms.
• HIC is increasingly recognized as an immune-mediated inflammatory disease, with autoimmunity playing a significant role.

Purpose of the Study:

• To review immune-mediated inflammation and autoimmunity in IC/BPS.
• To discuss experimental autoimmune cystitis (EAC) models for HIC research.
• To highlight the URO-OVA model as a novel transgenic EAC model that accurately replicates HIC.

Main Methods:

• Overview of existing literature on IC/BPS pathogenesis and animal models.
• Focus on the development and characteristics of the URO-OVA transgenic EAC model.
• Evaluation of the URO-OVA model's ability to mimic HIC clinical and pathological features.

Main Results:

• The URO-OVA model exhibits chronic bladder inflammation, pelvic/bladder pain, and urinary dysfunction characteristic of HIC.
• This model shows therapeutic responses to dimethyl sulfoxide (DMSO) and inhibitors of Toll-like receptor 4 (TLR4), mitogen-activated protein (MAP) kinase, and interferon-gamma (IFN-γ).
• The URO-OVA model demonstrates stability and reproducibility in research settings.

Conclusions:

• The URO-OVA model serves as a valuable and unique tool for HIC research.
• It effectively incorporates immune and autoimmune components relevant to HIC pathophysiology.
• This model facilitates mechanistic studies and the development of targeted therapies for HIC.