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  • Title: Effect of selective CCK1 receptor antagonism on accommodation and tolerance of intestinal gas in functional gut disorders.
    Author: Lobo B, Serra J, D'Amato M, Rovati L, Malagelada JR, Santos J, Azpiroz F.
    Journal: J Gastroenterol Hepatol; 2016 Feb; 31(2):288-93. PubMed ID: 26416485.
    Abstract:
    BACKGROUND: Participants with functional gut disorders develop gas retention and symptoms in response to intestinal gas loads that are well tolerated by healthy subjects. To determine the role of cholecystokinin (CCK1 ) receptors on gas transit and tolerance in women with functional gut disorders. METHODS: In 12 healthy women, and 24 women with functional gut disorders (12 dyspepsia and 12 constipation-predominant irritable bowel syndrome) gas was infused into the jejunum at 12 mL/min for 3 h with simultaneous duodenal lipid infusion (intralipid 1 kcal/min), while measuring anal gas evacuation and abdominal symptoms on a 0-6 score scale. Triple-blind paired studies during iv infusion of dexloxiglumide (2.5 mg/kg bolus plus 5 mg/kg h continuous infusion), a selective CCK1 inhibitor, or saline (control) were performed in random order. RESULTS: During saline infusion participants with functional gut disorders developed significantly greater gas retention and abdominal symptoms than healthy subjects (394 ± 40 mL vs 265 ± 35 mL and 2.8 ± 0.3 vs 1.9 ± 0.4 highest abdominal symptom score, respectively; P < 0.05 for both). Dexloxiglumide increased gas retention in both groups (514 ± 35 mL and 439 ± 60 mL, respectively; P = 0.033 vs saline for both); however, despite the larger retention, dexloxiglumide reduced abdominal symptoms (2.3 ± 0.2 score and 0.8 ± 0.3 score, respectively; P = 0.05 vs saline for both). Post-hoc analysis showed that, the decrease in abdominal symptoms was more pronounced in those participants with functional gut disorders with higher basal abdominal symptoms than in the rest (P = 0.037). CONCLUSION: Inhibition of CCK1 receptors by dexloxiglumide increases intestinal gas retention and reduces abdominal symptoms in response to by intestinal gas loads. European Clinical Trials Database (EudraCT 2005-003338-16).
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