Autorosette inhibition factor: a positive acute phase reactant in interstitial cystitis

Area of Science:

• Urology
• Immunology
• Pathophysiology

Background:

• Painful bladder disease, including interstitial cystitis (IC), presents complex diagnostic challenges.
• Biomarkers in urine, such as autorosette inhibition factor (AIF), complement C3d, and eosinophil cationic protein (ECP), are being investigated for their role in IC.

Purpose of the Study:

• To investigate the concentrations of urinary AIF, C3d, and ECP in patients with painful bladder disease.
• To explore potential correlations between these biomarkers and the diagnosis of interstitial cystitis (IC).

Main Methods:

• Urine samples were collected from 28 patients diagnosed with painful bladder disease.
• Levels of AIF, C3d, and ECP were measured in all urine samples.
• Statistical analysis was performed to identify correlations and significant differences between patient groups, particularly those with confirmed IC (detrusor mastocytosis).

Main Results:

• A significant positive correlation (r = 0.73, p < 0.01) was observed between urinary AIF and C3d in patients with IC.
• Urinary ECP median concentration was significantly elevated in IC patients.
• Urinary C3d median concentration was significantly elevated in both IC patients and other painful bladder disease patients.
• AIF demonstrated characteristics of a positive acute phase reactant in IC.

Conclusions:

• Urinary AIF, C3d, and ECP are elevated in patients with interstitial cystitis.
• The positive correlation between AIF and C3d in IC suggests a potential role in the inflammatory process.
• AIF may influence bladder epithelial barrier function, contributing to IC pathogenesis.