Placebo-controlled trial of misoprostol in cystic fibrosis

P Robinson1, P D Sly

  • 1Department of Thoracic Medicine, Royal Children's Hospital, Melbourne, Australia.

Insights

Misoprostol improved fat absorption in children with cystic fibrosis who had less than 90% absorption on pancreatic enzyme therapy alone. It did not significantly benefit those with over 90% absorption.

Area of Science:

  • Pediatric Gastroenterology
  • Pharmacology

Background:

  • Cystic fibrosis (CF) often leads to malabsorption due to pancreatic insufficiency.
  • Pancreatic enzyme replacement therapy (PERT) is standard, but some patients experience residual malabsorption.

Purpose of the Study:

  • To evaluate the efficacy of misoprostol in improving fat absorption in pediatric CF patients on PERT.
  • To identify patient subgroups that may benefit from adjunctive misoprostol therapy.

Main Methods:

  • A 6-week, double-blind, placebo-controlled, crossover trial involving 17 children with CF.
  • Patients received either misoprostol (100 mcg, 4 times daily) or placebo, followed by the alternative treatment.
  • Fat absorption was measured during both treatment periods.

Main Results:

  • Misoprostol significantly improved fat absorption in patients with baseline absorption <90% (p<0.01).
  • No significant improvement was observed in patients with baseline absorption >90%.
  • One patient showed elevated eosinophils; other hematological and biochemical parameters remained unchanged.

Conclusions:

  • Misoprostol is beneficial for children with cystic fibrosis experiencing residual fat malabsorption despite standard enzyme therapy.
  • It may be a valuable adjunct for specific CF patient subgroups with suboptimal absorption.
  • Further research into safety and optimal dosing in CF is warranted.

Related Concept Videos

Cystic Fibrosis: Pathogenesis01:23

Cystic Fibrosis: Pathogenesis

Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation, but...
Drugs for Peptic Ulcer Disease: Prostaglandin Analogs as Mucosal Protective Agents01:20

Drugs for Peptic Ulcer Disease: Prostaglandin Analogs as Mucosal Protective Agents

The gastric mucosa produces prostaglandins E2 (PGE2) and prostacyclin (PGI2), crucial in maintaining gastric health. They exert cytoprotective effects, including increasing bicarbonate secretion, releasing protective mucin, reducing gastric acid output, and preventing harmful vasoconstriction. These effects are mediated through various receptors, such as EP1, EP2, EP3, and EP4.
Non-steroidal anti-inflammatory drugs (NSAIDs) can induce peptic ulcers by inhibiting cyclooxygenase, decreasing...
Drugs for Treatment of Constipation-Predominant IBS01:21

Drugs for Treatment of Constipation-Predominant IBS

Pharmacological therapies for IBS-C are designed to alleviate abdominal discomfort and enhance bowel function. In patients with IBS-C, fiber supplements may help soften stools and decrease straining, but may also lead to increased gas production and bloating. Osmotic laxatives like milk of magnesia are frequently used to soften stools and increase stool frequency in IBS-C patients. In addition, two drugs approved for use in severe IBS-C adult cases are linaclotide (Linzess) and lubiprostone...