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Eicosanoid synthesis by human urinary bladder mucosa: pathological implications.

J Y Jeremy, V Tsang, D P Mikhailidis

British Journal of Urology

|January 1, 1987

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Human bladder biopsies release various eicosanoids, including prostacyclin (PGI2) and prostaglandin E2 (PGE2). These compounds may influence bladder function and mucosal protection, similar to findings in rat studies.

Area of Science:

Urology
Biochemistry
Physiology

Background:

Eicosanoids are signaling molecules with diverse physiological roles.
The urinary bladder's role in eicosanoid production is not fully understood.
Previous studies suggest eicosanoid involvement in smooth muscle regulation.

Purpose of the Study:

To investigate the types and amounts of eicosanoids released by human urinary bladder mucosa.
To compare human bladder eicosanoid release with findings in rat models.
To explore the potential physiological functions of bladder-derived eicosanoids.

Main Methods:

Human urinary bladder mucosal biopsies were obtained during cystoscopy.
Eicosanoid release from biopsies was quantified.

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Comparative analysis with existing rat urinary bladder data was performed.

Main Results:

Biopsies released eicosanoids in the order: prostacyclin (PGI2), prostaglandin E2 (PGE2), prostaglandin F2 alpha (PGF2 alpha), and thromboxane A2 (TXA2).
The profile and quantity of released eicosanoids were comparable to those reported for rat urinary bladders.
Significant release of multiple eicosanoids was observed from the human bladder tissue.

Conclusions:

The human urinary bladder mucosa actively produces and releases various eicosanoids.
These bladder-derived eicosanoids may play roles in modulating bladder tone, contractility, and mucosal cytoprotection.
Urinary eicosanoid excretion should be interpreted cautiously as it may not solely reflect systemic or renal production.