Cyclooxygenase-2 inhibitor ameliorates ureteric damage in rats with obstructed uropathy

Area of Science:

• Urology
• Pharmacology
• Cell Biology

Background:

• Ureteral obstruction leads to hydroureter and progressive fibrosis.
• Cyclooxygenase-2 (COX-2) and its product prostaglandin E(2) (PGE(2)) are implicated in inflammatory and fibrotic processes.

Purpose of the Study:

• To investigate the therapeutic potential of a COX-2 inhibitor on tissue damage and fibrosis in a rat model of ureteral obstruction.
• To examine the effects of Celecoxib on the expression of key fibrotic and cellular markers in obstructed ureters.

Main Methods:

• Eighty rats underwent unilateral ureteral ligation; 40 received Celecoxib treatment.
• Tissue damage, fibrosis, and expression of COX-2, PGE(2), TGF-beta(1), alpha-SMA, PCNA, and apoptotic cells were assessed at multiple time points.
• Histological and molecular analyses were performed on ureteric tissue samples.

Main Results:

• Celecoxib treatment significantly reduced hydroureter and muscle layer fibrosis compared to controls.
• Celecoxib abolished COX-2 and PGE(2) expression and decreased TGF-beta(1), alpha-SMA, and apoptotic cell markers.
• PCNA expression was increased in Celecoxib-treated rats, suggesting enhanced cell proliferation.

Conclusions:

• COX-2 inhibition with Celecoxib ameliorates ureteral obstruction-induced damage and fibrosis.
• The protective effect may involve the downregulation of COX-2, PGE(2), and TGF-beta(1) pathways.
• COX-2 inhibitors represent a potential therapeutic strategy for managing ureteral obstruction.