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Linaclotide increases cecal pH, accelerates colonic transit, and increases colonic motility in irritable bowel syndrome with constipation.
- Source :
-
Neurogastroenterology and motility [Neurogastroenterol Motil] 2019 Feb; Vol. 31 (2), pp. e13492. Date of Electronic Publication: 2018 Oct 23. - Publication Year :
- 2019
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Abstract
- Background: Linaclotide is efficacious in the management of irritable bowel syndrome with constipation (IBS-C), yet relatively little is known regarding its effect on human gastrointestinal physiology. The primary aim of the study was to examine the effect of linaclotide on change in pH across the ileocecal junction (ICJ), a proposed measure of cecal fermentation, and its relationship to symptoms and quality of life (QoL) in IBS-C.<br />Methods: A total of 13 participants with Rome III IBS-C underwent a standardized wireless motility capsule (WMC). Stool consistency was measured using the Bristol stool form scale (BSFS) and frequency with spontaneous bowel movements (SBM). Gastrointestinal symptoms and QoL were assessed using validated questionnaires. The WMC and questionnaires were repeated after 28 days of linaclotide 290 g po od.<br />Key Results: Linaclotide reduced the change in pH across the ICJ (-2.4 ± 0.2 vs -2.1 ± 0.4, P = 0.01) as a function of a relative alkalinization of the cecum (5.2 ± 0.2 vs 5.5 ± 0.3, P = 0.02). Linaclotide accelerated colonic transit time (2650 minutes (2171-4038) vs. 1757 (112-3011), P = 0.02), increased colonic log motility index (15 ± 1.8 vs. 16.5 ± 1.8, P = 0.004) but had no effect of gastric emptying or small bowel transit. Change in pH across the ICJ correlated with improvement in symptom intensity, unpleasantness, and visceral sensitivity index (r = 0.62, P = 0.03, r = 0.63, P = 0.02, r = 0.62, P = 0.02) and with increases in BSFS type and SBM (r = 0.9, P < 0.0001, r = 0.6, P = 0.02).<br />Conclusions & Inferences: Linaclotide's effects are confined to the colon where it increases cecal pH, potentially representing a reduction in cecal fermentation and accelerates colonic motility.<br /> (© 2018 John Wiley & Sons Ltd.)
- Subjects :
- Adult
Cecum chemistry
Cecum physiopathology
Colon drug effects
Constipation drug therapy
Female
Gastrointestinal Motility drug effects
Gastrointestinal Transit drug effects
Humans
Ileocecal Valve chemistry
Ileocecal Valve drug effects
Ileocecal Valve physiopathology
Irritable Bowel Syndrome physiopathology
Male
Middle Aged
Cecum drug effects
Guanylyl Cyclase C Agonists therapeutic use
Hydrogen-Ion Concentration drug effects
Irritable Bowel Syndrome drug therapy
Peptides therapeutic use
Subjects
Details
- Language :
- English
- ISSN :
- 1365-2982
- Volume :
- 31
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Neurogastroenterology and motility
- Publication Type :
- Academic Journal
- Accession number :
- 30353623
- Full Text :
- https://doi.org/10.1111/nmo.13492