Abstract
Abdominal pain is common in the general population and, in patients with irritable bowel syndrome, is attributed to visceral hypersensitivity. We found that oral administration of specific Lactobacillus strains induced the expression of mu-opioid and cannabinoid receptors in intestinal epithelial cells, and mediated analgesic functions in the gut-similar to the effects of morphine. These results suggest that the microbiology of the intestinal tract influences our visceral perception, and suggest new approaches for the treatment of abdominal pain and irritable bowel syndrome.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Abdominal Pain / physiopathology*
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Abdominal Pain / prevention & control
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Administration, Oral
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Analgesics, Opioid / administration & dosage
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Analgesics, Opioid / pharmacology
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Animals
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Cannabinoid Receptor Antagonists
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Colon / drug effects
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Colon / microbiology
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Colon / physiopathology
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Dose-Response Relationship, Drug
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HT29 Cells
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Humans
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Indoles / administration & dosage
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Indoles / pharmacology
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Intestines / drug effects
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Intestines / microbiology
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Intestines / physiopathology*
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Lactobacillus acidophilus / physiology*
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Male
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Mice
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Mice, Inbred BALB C
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Morphine / administration & dosage
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Morphine / pharmacology
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Naloxone / administration & dosage
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Naloxone / pharmacology
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Narcotic Antagonists / administration & dosage
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Narcotic Antagonists / pharmacology
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Probiotics / administration & dosage
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Probiotics / pharmacology
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Rats
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Rats, Sprague-Dawley
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Receptor, Cannabinoid, CB2 / antagonists & inhibitors
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Receptor, Cannabinoid, CB2 / biosynthesis
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Receptor, Cannabinoid, CB2 / physiology
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Receptors, Cannabinoid / biosynthesis
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Receptors, Cannabinoid / physiology*
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Receptors, Opioid / biosynthesis
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Receptors, Opioid / physiology*
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Receptors, Opioid, mu / antagonists & inhibitors
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Receptors, Opioid, mu / biosynthesis
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Receptors, Opioid, mu / physiology
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Rectum / drug effects
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Rectum / microbiology
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Rectum / physiopathology
Substances
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Analgesics, Opioid
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Cannabinoid Receptor Antagonists
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Indoles
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Narcotic Antagonists
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Receptor, Cannabinoid, CB2
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Receptors, Cannabinoid
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Receptors, Opioid
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Receptors, Opioid, mu
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Naloxone
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Morphine
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iodopravadoline