title: Non-erosive reflux disease (NERD), symptomatic and asymptomatic erosive reflux disease (ERD): from hypersensitive to hyposensitive esophagus.
abstract: OBJECTIVE
  To compare the esophageal sensitivity to acid and saline in patients with symptomatic and asymptomatic erosive reflux disease (ERD), non-erosive reflux disease (NERD) and controls, and to assess the response to proton-pump inhibitors in patients with symptomatic ERD and NERD.
  
  
  METHODS
  Patients with GERD and a control group of healthy asymptomatic volunteers were recruited. All subjects underwent esophagogastroduodenoscopy and the acid-saline perfusion test. Symptomatic ERD and NERD patients were given rabeprazole 20 mg twice daily for 2 weeks and their response to treatment assessed.
  
  
  RESULTS
  A total of 105 subjects were recruited: ERD=37 (symptomatic=24, asymptomatic=13), NERD=34 and controls=34. During saline perfusion, only the NERD group recorded a significantly higher sensitivity score compared to controls (2.74±7.28 vs. 0) (p=0.035). During acid perfusion, symptomatic ERD (15.42±13.42) and NERD (16.71±15.04) had significantly higher scores versus controls and asymptomatic ERD patients (both p<0.001). The mean %∆ reflux symptom score following treatment was significantly higher in symptomatic ERD patients compared to NERD patients (89.08±21.67 vs. 58.53±32.54; p<0.001).
  
  
  CONCLUSIONS
  Patients with NERD were a generally hypersensitive group while asymptomatic ERD patients represent a hyposensitive group of patients which merits further study.
authors.affiliation: Department of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
authors.forename: Juanda L
authors.initials: JL
authors.lastname: Hartono
authors.forename: Choon-Seng
authors.initials: CS
authors.lastname: Qua
authors.forename: Khean-Lee
authors.initials: KL
authors.lastname: Goh
mesh_terms: D053799:2-Pyridinylmethylsulfinylbenzimidazoles / Q000627:therapeutic use; D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D018450:Disease Progression; D005260:Female; D005764:Gastroesophageal Reflux / Q000188:drug therapy / Q000473:pathology* / Q000503:physiopathology*; D006801:Humans; D006851:Hydrochloric Acid / Q000009:adverse effects; D006967:Hypersensitivity / Q000209:etiology / Q000473:pathology; D008297:Male; D008875:Middle Aged; D054328:Proton Pump Inhibitors / Q000627:therapeutic use; D064750:Rabeprazole; D012965:Sodium Chloride / Q000009:adverse effects; D016896:Treatment Outcome
chemical_list: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D054328:Proton Pump Inhibitors; D064750:Rabeprazole; D012965:Sodium Chloride; D006851:Hydrochloric Acid
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