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Revisiting the Role of Esophageal Mucosal Dilated Intercellular Spaces in the Diagnosis and Pathophysiology of Heartburn

Gorgulu, Volkan; Ergun, Pelin; Kipcak, Sezgi; Doganavsargil, Basak; Sifrim, Daniel; Bor, Serhat


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    "creators": [
      {
        "affiliation": "Ege Univ, Fac Med, Dept Histol & Embryol, Izmir, Turkiye", 
        "name": "Gorgulu, Volkan"
      }, 
      {
        "name": "Ergun, Pelin"
      }, 
      {
        "name": "Kipcak, Sezgi"
      }, 
      {
        "affiliation": "Ege Univ, Fac Med, Dept Pathol, Izmir, Turkiye", 
        "name": "Doganavsargil, Basak"
      }, 
      {
        "affiliation": "Queen Mary Univ London, Wingate Inst Neurogastroenterol, Blizard Inst, Barts & London Sch Med & Dent, London, England", 
        "name": "Sifrim, Daniel"
      }, 
      {
        "name": "Bor, Serhat"
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    "description": "<p>Background/AimsDilated intercellular spaces (DISs) facilitate the diffusion of noxious agents into the deep layers of the esophageal epithelium. The role of DIS in heartburn pathogenesis is still controversial. Therefore, we aim to reinvestigate DIS in an extensively evaluated group of patients and healthy controls (HCs).MethodsWe classified 149 subjects into the following groups: 15 HC, 58 mild erosive reflux disease (ERD), 17 severe ERD, 25 nonerosive reflux disease (NERD), 15 reflux hypersensitivity (RH), and 19 functional heartburn (FH). A total of 100 length measurements were performed for each patient's biopsy.ResultsThe overall intercellular spaces (ISs) value of gastroesophageal reflux disease (GERD) patients was higher than that of HC (P = 0.020). In phenotypes, mild ERD (vs HC [P = 0.036], NERD [P = 0.004], RH [P = 0.014]) and severe ERD (vs HC [P = 0.002], NERD [P &lt; 0.001], RH [P = 0.001], FH [P = 0.004]) showed significantly higher IS. There was no significant difference between the HC, NERD, RH, and FH groups. The 1.12 mu m DIS cutoff value had 63.5% sensitivity and 66.7% specificity in the diagnosis of GERD. There was a weak correlation (r = 0.302) between the IS value and acid exposure time, and a weak correlation (r = -0.359) between the IS value and baseline impedance. A strong correlation was shown between acid exposure time and baseline impedance (r = -0.783).ConclusionsSince the IS length measurement had better discrimination power only in erosive groups, it is not feasible to use in daily routine to discriminate other nonerosive phenotypes and FH. The role of DIS in heartburn in nonerosive patients should be reconsidered. (J Neurogastroenterol Motil 2023</p>", 
    "doi": "10.5056/jnm22142", 
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    "journal": {
      "issue": "4", 
      "pages": "10", 
      "title": "JOURNAL OF NEUROGASTROENTEROLOGY AND MOTILITY", 
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    "title": "Revisiting the Role of Esophageal Mucosal Dilated Intercellular Spaces in the Diagnosis and Pathophysiology of Heartburn"
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