Urinary Urocortin as a Potential Non-Invasive Biomarker in Endometriosis: Exploratory Study with Histone H4

Area of Science:

• Gynecology
• Biomarker Discovery
• Endocrinology

Background:

• Endometriosis is a complex gynecological condition often involving the ovaries.
• Current diagnosis relies on invasive methods, necessitating non-invasive biomarkers.
• Ovarian endometriosis presents unique diagnostic challenges.

Purpose of the Study:

• To evaluate Urocortin and Histone H4 as potential non-invasive biomarkers for ovarian endometriosis.
• To assess the diagnostic performance of these biomarkers in serum and urine.
• To determine the clinical relevance of Urocortin and Histone H4 in endometriosis patients.

Main Methods:

• Exploratory study with 40 women (30 ovarian endometriosis, 5 parietal endometriosis, 5 controls).
• Quantification of Urocortin and Histone H4 in serum and urine using ELISA.
• Samples collected during the proliferative phase of the menstrual cycle.
• Statistical analyses including comparative and multivariate regression.

Main Results:

• Urinary Urocortin levels were significantly elevated in ovarian endometriosis patients (p=0.001).
• Serum Urocortin levels showed no significant differences between groups.
• Urinary Urocortin levels were influenced by age, age at menarche, and disease duration (adjusted R²=0.283).
• Histone H4 (serum and urine) lacked significant discriminatory value.

Conclusions:

• Urinary Urocortin demonstrates a preliminary diagnostic signal for ovarian endometriosis.
• Histone H4 is not a significant biomarker for ovarian endometriosis in this cohort.
• Larger, multicenter studies are needed to validate these findings and explore urine normalization methods.