Antibiotic Driven Changes in Gut Motility Suggest Direct Modulation of Enteric Nervous System

Frontiers in Neuroscience
Thilini DelungahawattaWolfgang A Kunze

Abstract

Antibiotic-mediated changes to the intestinal microbiome have largely been assumed to be the basis of antibiotic-induced neurophysiological and behavioral changes. However, relatively little research has addressed whether antibiotics act directly on the host nervous system to produce these changes. We aimed to identify whether acute exposure of the gastrointestinal tract to antibiotics directly modulates neuronally dependent motility reflexes, ex vivo. Motility of colon and jejunum segments in a perfusion organ bath was recorded by video and alterations to neuronally dependent propagating contractile clusters (PCC), measured using spatiotemporal maps of diameter changes. Short latency (<10 min) changes to PCC serve as an index of putative effects on the host nervous system. Bacitracin, penicillin V, and neomycin, all produced dose-dependent alterations to the velocity, frequency, and amplitude of PCC. Most significantly, colonic PCC velocity increased by 53% [probability of superiority (PS) = 87%] with 1.42 mg/ml bacitracin, 19% (PS = 81%) with 0.91 mg/ml neomycin, and 19% (PS = 86%) with 3.88 mg/ml penicillin V. Colonic frequency increased by 16% (PS = 73%) with 1.42 mg/ml bacitracin, 21% (PS = 79%) with 0.91 mg/ml neomycin, a...Continue Reading

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Citations

Jun 17, 2020·European Journal of Neurology : the Official Journal of the European Federation of Neurological Societies·X KangK Wirdefeldt
Mar 23, 2019·Psychopharmacology·Rachael HorneJane A Foster
Sep 15, 2020·Journal of Parkinson's Disease·Christine L WestWolfgang A Kunze
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Dec 15, 2020·Trends in Microbiology·Amélie JolyFilipe De Vadder

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