Related Experiment Video
Updated: May 9, 2026

Bladder Smooth Muscle Strip Contractility as a Method to Evaluate Lower Urinary Tract Pharmacology
Published on: August 18, 2014
Bartter's syndrome: urinary prostaglandin E-like material and kallikrein; indomethacin effects
Abstract:
The urinary excretions of prostaglandin E-like material (iPGE) and kallikrein were measured in two children with Bartter's syndrome. Urinary iPGE excretion was three and 10 times greater than normal, and urinary kallikrein was five and 10 times greater than normal in the two subjects. Furthermore, excretions of iPGE and kallikrein were highly correlated (P less than 0.005) with each other before and during treatment with indomethacin, a prostaglandin synthetase inhibitor. Indomethacin significantly (P less than 0.001) reduced urinary iPGE, urinary kallikrein, and plasma renin activity, while increasing the sensitivity to intravenous angiotensin II and the serum potassium to normal. The results confirm that renal prostaglandins may be involved in the pathogenesis of Bartter's syndrome and suggest that renal prostaglandins and the kallikrein-kinin system are linked.
Related Concept Videos
Treatment for Pulmonary Arterial Hypertension: Prostacyclin Receptor Agonists
These agonists bind to the IPR receptor situated on the plasma membrane of the pulmonary artery smooth muscle cells. This binding triggers a cascade of reactions known as the GS-AC-cAMP-PKA pathway. This pathway results in the relaxation of smooth muscle...
Drugs for Peptic Ulcer Disease: Prostaglandin Analogs as Mucosal Protective Agents
Non-steroidal anti-inflammatory drugs (NSAIDs) can induce peptic ulcers by inhibiting cyclooxygenase, decreasing...
Gastritis-II: Pathophysiology
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...
Urinary Tract Calculi II: Pathophysiology and Clinical Manifestations
Acute Inflammation II: Local and Systemic Effects
Peptic Ulcer Disease II: Pathophysiology

