Cited by 269Gastrointestinal motility and disordersPsychosomatic Disorders and Their TreatmentsInfant Health and Development

Amitriptyline reduces rectal pain related activation of the anterior cingulate cortex in patients with irritable bowel syndrome

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Morgan, V·2005·Gut

Abstract

BACKGROUND AND AIMS: Irritable bowel syndrome (IBS) is a disorder of intestinal hypersensitivity and altered motility, exacerbated by stress. Functional magnetic resonance imaging (fMRI) during painful rectal distension in IBS has demonstrated greater activation of the anterior cingulate cortex (ACC), an area relevant to pain and emotions. Tricyclic antidepressants are effective for IBS. The aim of this study was to determine if low dose amitriptyline reduces ACC activation during painful rectal distension in IBS to confer clinical benefits. Secondary aims were to identify other brain regions altered by amitriptyline, and to determine if reductions in cerebral activation are greater during mental stress. METHODS: Nineteen women with painful IBS were randomised to amitriptyline 50 mg or placebo for one month and then crossed over to the alternate treatment after washout. Cerebral activation during rectal distension was compared between placebo and amitriptyline groups by fMRI. Distensions were performed alternately during auditory stress and relaxing music. RESULTS: Rectal pain induced significant activation of the perigenual ACC, right insula, and right prefrontal cortex. Amitriptyline was associated with reduced pain related cerebral activations in the perigenual ACC and the left posterior parietal cortex, but only during stress. CONCLUSIONS: The tricyclic antidepressant amitriptyline reduces brain activation during pain in the perigenual (limbic) anterior cingulated cortex and parietal association cortex. These reductions are only seen during stress. Amitriptyline is likely to work in the central nervous system rather than peripherally to blunt pain and other symptoms exacerbated by stress in IBS.

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  • Modulating activity of the brain regions responsible for visceral pain using various therapies has been shown to improve IBS symptomatology.

    “Modulating activity of the brain regions responsible for visceral pain using various therapies has been shown to improve IBS symptomatology.[36][37][38]”

    From British Society of Gastroenterology guidelines on the management of irritable bowel syndrome (2021) · cites this paper as [37]

    The Discussion reports that amitriptyline reduced pain-related brain activation during mental stress in patients with IBS, but describes symptom improvement through this mechanism as a postulate. The Symptom rating section found a nonsignificant preference for amitriptyline (p = 0.06) and a nonsignificant difference in pain ratings (p = 0.2). This single-drug study does not establish that various therapies improve IBS symptoms by modulating brain activity. (LLM, conf=0.88)

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  • Treatments targeting the CNS, such as antidepressants and psychological interventions, can reduce intestinal sensation/sensitivity and improve GI symptoms in patients with IBS.

    “Furthermore, treatments targeting the CNS, such as antidepressants and psychological interventions, can reduce intestinal sensation/sensitivity and improve GI symptoms in patients with IBS (21, 111, 150, 165).”

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Research works printed but not linked: 8

  1. [9]9. Drossman DA, Toner BB, Whitehead WE, et al. Cognitive-behavioral therapy versus education and desipramine versus placebo for moderate to severe functional bowel disorders. Gastroenterology 2003;125:249-53.
  2. [21]21. Tolle TR, Kaufmann T, Siessmeier T, et al. Region-specific encoding of sensory and affective components of pain in the human brain: a positron emission tomography correlation analysis. Ann Neurol 1999;45:40-7.
  3. [22]22. Mertz H, Morgan V, Tanner G, et al. Regional cerebral activation in IBS and controls with painful and non-painful rectal distention. Gastroenterology 2000;118:842-8.
  4. [31]31. McQuay JH, Moore RA. Antidepressants and chronic pain. BMJ 1997;314:763-64.
  5. [37]37. Derbyshire S, Vogt B, Jones A. Pain and stroop interference tasks activate separate processing modules in anterior cingulate cortex. Exp Brain Res 1998;118:52-60.
  6. [47]47. LeDoux J. The neural circuits underlying anxiety and fear. Biol Psychiatry 1998;44:1229-38.
  7. [55]55. Welgan P, Meshkinpour H, Beeler M. Effect of anger on colon motor and myoelectric activityin irritable bowel syndrome. Gastroenterology 1988;94:1150-6.
  8. [56]56. Mertz H, Pickens D, Fass R, et al. Stress increases sensitivity to rectal distension in IBS but not control, associated with greater limbic system activation. Gastroenterology 2002;122:A311.

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Authors
Morgan, V
Affiliations
Vanderbilt University (US)
Corresponding author
Morgan, V
Venue
Gut
Publisher
BMJ
Published
2005-05-01
Volume
54
Issue
5
Pages
601-607
ISSN
0017-5749 (ISSN-L)
OpenAlex
W2168058358
Cited by
269
References
57
Citations by year
2026: 4 · 2025: 8 · 2024: 12 · 2023: 6 · 2022: 6 · 2021: 12 · 2020: 8 · 2019: 7 · 2018: 11 · 2017: 11 · 2016: 9 · 2015: 15 · 2014: 20 · 2013: 17 · 2012: 9
FWCI
14.86
Type
journal article
Language
en
Open access
Locations
  • Gut (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • HighWire Press Open Archive (submittedVersion)
Funders
  • National Institutes of Health (5r21dk057047-02)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R21 DK57047)
Topics
  • Health Sciences › Medicine › Gastroenterology › Gastrointestinal motility and disorders
  • Health Sciences › Medicine › Psychiatry and Mental health › Psychosomatic Disorders and Their Treatments
  • Health Sciences › Health Professions › Pharmacy › Infant Health and Development
Keywords
irritable bowel syndrome, amitriptyline, tricyclic antidepressants, anterior cingulate cortex, rectal pain, brain activation, stress, insula, prefrontal cortex, posterior parietal cortex, intestinal hypersensitivity
MeSH terms
Adult, Amitriptyline, Antidepressive Agents, Tricyclic, Brain, Brain Mapping, Dilatation, Double-Blind Method, Female, Gyrus Cinguli, Humans, Hyperalgesia, Magnetic Resonance Imaging, Middle Aged, Pain Measurement, Physical Stimulation, Psychiatric Status Rating Scales, Rectum, Stress, Psychological, Cross-Over Studies, Analgesics, Non-Narcotic, Irritable Bowel Syndrome

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