Abnormal intestinal permeability predicts relapse in inactive Crohn disease

Area of Science:

• Gastroenterology
• Clinical Medicine
• Inflammatory Bowel Disease Research

Background:

• Maintenance therapy trials in quiescent Crohn disease often lack power.
• Objective markers are needed to predict relapse in Crohn disease.
• Intestinal permeability (IP) is a potential marker, but its relation to other markers is unclear.

Purpose of the Study:

• To evaluate the predictive value of intestinal permeability (IP) for relapse in inactive Crohn disease.
• To compare IP's predictive accuracy against clinical and blood markers.
• To inform the design of future clinical trials for Crohn disease maintenance therapy.

Main Methods:

• Assessed 50 patients with inactive Crohn disease (Crohn disease activity index < 150).
• Measured intestinal permeability (IP) using urinary lactulose and rhamnose excretion.
• Collected data on clinical and blood markers; followed patients for one year to assess relapse.

Main Results:

• Abnormal IP was significantly associated with a higher likelihood of relapse (P = 0.0001, relative risk 18).
• Patients with abnormal IP had a higher relapse rate (8/18) compared to those with normal IP (1/32).
• Multiple regression analysis confirmed IP as an independent predictor of relapse; shorter disease duration was also noted in relapsed patients.

Conclusions:

• Abnormal intestinal permeability is a strong predictor of relapse in inactive Crohn disease.
• IP outperforms clinical and blood markers in predicting relapse.
• Abnormal IP may indicate subclinical mucosal inflammation, useful for trial stratification.