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Peripheral Opioid Receptor Blockade Enhances Epithelial Damage in Piroxicam-Accelerated Colitis in IL-10-Deficient Mice
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Peripheral Opioid Receptor Blockade Enhances Epithelial Damage in Piroxicam-Accelerated Colitis in IL-10-Deficient Mice
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Peripheral Opioid Receptor Blockade Enhances Epithelial Damage in Piroxicam-Accelerated Colitis in IL-10-Deficient Mice
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Journal Article
Peripheral Opioid Receptor Blockade Enhances Epithelial Damage in Piroxicam-Accelerated Colitis in IL-10-Deficient Mice
2021
Overview
Mucosal CD4+ T lymphocytes display a potent opioid-mediated analgesic activity in interleukin (IL)-10 knockout mouse model of inflammatory bowel diseases (IBD). Considering that endogenous opioids may also exhibit anti-inflammatory activities in the periphery, we examined the consequences of a peripheral opioid receptor blockade by naloxone-methiodide, a general opioid receptor antagonist unable to cross the blood–brain barrier, on the development of piroxicam-accelerated colitis in IL-10-deficient (IL-10-/-) mice. Here, we show that IL-10-deficient mice treated with piroxicam exhibited significant alterations of the intestinal barrier function, including permeability, inflammation-related bioactive lipid mediators, and mucosal CD4+ T lymphocyte subsets. Opioid receptor antagonization in the periphery had virtually no effect on colitis severity but significantly worsened epithelial cell apoptosis and intestinal permeability. Thus, although the endogenous opioid tone is not sufficient to reduce the severity of colitis significantly, it substantially contributes to the protection of the physical integrity of the epithelial barrier.
Publisher
MDPI AG,MDPI
Subject
/ Animals
/ Anti-Inflammatory Agents - pharmacology
/ Anti-Inflammatory Agents, Non-Steroidal - pharmacology
/ Biochemistry, Molecular Biology
/ CD4-Positive T-Lymphocytes - drug effects
/ Colitis - chemically induced
/ Epithelial Cells - drug effects
/ Intestinal Mucosa - drug effects
/ Intestinal Mucosa - metabolism
/ Lipids
/ Mice
/ Naloxone - analogs & derivatives
/ Narcotic Antagonists - administration & dosage
/ Quaternary Ammonium Compounds - pharmacology
