Transepithelial Leak in Barrett's Esophagus
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Using orally administered sucrose as a probe of gastrointestinal permeability, this study focused on determining whether Barrett's metaplasia exhibits a paracellular transepithelial leak to small nonelectrolytes. Subjects in five separate classes (nonendoscoped, asymptomatic controls; endoscoped, asymptomatic controls; gastroesophageal reflux disease without mucosal complications; grossly visible esophagitis; and Barrett's esophagus) consumed a sucrose solution at bedtime and collected all overnight urine. Urine volume was measured and sucrose concentration was determined by high-performance liquid chromatography. Patients with Barrett's were observed to exhibit a transepithelial leak to sucrose whose mean value was threefold greater than that seen in healthy control subjects or patients with reflux but without any mucosal defect. A parallel study of claudin tight junction proteins in endoscopy biopsy samples showed that whereas Barrett's metaplasia contains dramatically more claudin-2 and claudin-3 than is found in normal esophageal mucosa, it is markedly lower in claudins 1 and 5, indicating very different tight junction barriers.
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Sun N, Ogulur I, Mitamura Y, Yazici D, Pat Y, Bu X Allergy. 2024; 79(12):3192-3237.
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Abu-Farsakh S, Wu T, Lalonde A, Sun J, Zhou Z BMC Gastroenterol. 2017; 17(1):33.
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Oshima T, Miwa H J Gastroenterol. 2016; 51(8):768-78.
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