Correlation Between Nitric Oxide and Urodynamics in Men With Bladder Outlet Obstruction.

Area of Science:

• Urology
• Nephrology
• Physiology

Background:

• Bladder outlet obstruction (BOO) is a common condition in men, often leading to lower urinary tract symptoms.
• Nitric oxide (NO) plays a crucial role in bladder function, including smooth muscle relaxation and contractility.
• Understanding the role of different nitric oxide synthase (NOS) isoforms in BOO is essential for developing targeted therapies.

Purpose of the Study:

• To investigate the correlation between nitric oxide (NO) and urodynamic parameters in men with bladder outlet obstruction (BOO).
• To analyze the expression of endothelial NOS (eNOS), inducible NOS (iNOS), and neuronal NOS (nNOS) in the urothelium of men with BOO.
• To compare NOS expression between patients with and without detrusor underactivity (DU).

Main Methods:

• Prospective enrollment of 25 men undergoing surgical treatment for benign prostatic obstruction (BOO).
• Preoperative urodynamic assessment to identify BOO.
• Analysis of eNOS, iNOS, and nNOS expression in bladder tissue obtained during surgery.
• Correlation analysis between NOS levels and urodynamic parameters (maximal flow rate, maximum cystometric capacity, detrusor pressure, bladder contractility index).

Main Results:

• eNOS levels positively correlated with maximal flow rate and maximum cystometric capacity (MCC).
• iNOS levels positively correlated with MCC.
• nNOS levels positively correlated with detrusor pressure at maximal flow and bladder contractility index.
• No significant difference in eNOS, iNOS, or nNOS expression was found between BOO with DU and BOO without DU groups.

Conclusions:

• Nitric oxide (NO) is correlated with bladder dysfunction in men with BOO.
• Neuronal NOS (nNOS) may serve as an indicator of altered detrusor function in the context of BOO.
• Further research is warranted to elucidate the precise mechanisms of NO involvement in BOO-related bladder dysfunction.