HA-HAase urine test. A sensitive and specific method for detecting bladder cancer and evaluating its grade

Area of Science:

• Biochemistry
• Oncology
• Urology

Background:

• Hyaluronic acid (HA) and hyaluronidase (HAase) play roles in bladder tumor development, angiogenesis, and metastasis.
• Tumor-associated HA and HAase are detectable in urine.
• HA degradation by HAase in G2/G3 bladder tumors generates angiogenic fragments excreted in urine.

Purpose of the Study:

• To evaluate the diagnostic and grading capabilities of urinary hyaluronic acid (HA) and hyaluronidase (HAase) levels for bladder cancer.
• To assess the combined HA-HAase test's sensitivity and specificity in detecting bladder cancer and monitoring recurrence.

Main Methods:

• Measurement of urinary hyaluronic acid (HA) levels.
• Measurement of urinary hyaluronidase (HAase) activity.
• Development and validation of a combined HA-HAase test for bladder cancer detection and grading.

Main Results:

• An elevated urinary HA level (>= 500 ng/mg) indicates bladder cancer presence, irrespective of tumor grade.
• Elevated urinary HAase levels (>= 10 mU/mg) correlate with higher-grade bladder cancers (G2/G3).
• The combined HA-HAase test demonstrated 92% sensitivity for bladder cancer detection with high specificity and efficacy in monitoring recurrence.

Conclusions:

• The HA-HAase urine test is a sensitive and specific noninvasive method for bladder cancer detection and grading.
• This combined biomarker approach offers a potentially more accurate and cost-effective alternative to existing noninvasive bladder cancer diagnostic tests.
• The HA-HAase test shows promise for routine bladder cancer screening and recurrence monitoring.