Identification of choline-degrading bacteria from healthy human feces and used for screening of trimethylamine (TMA)-lyase inhibitors

Nov 30, 2020Microbial pathogenesis

Finding gut bacteria that break down choline and testing substances that block their trimethylamine production

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Abstract

TMA levels were significantly decreased when treated with β-sitosterol and resveratrol.

  • Gut microbiota can convert choline to trimethylamine (TMA), which is then transformed into trimethylamine-N-oxide (TMAO), associated with cardiovascular disease (CVD).
  • Choline-degrading bacteria were isolated from healthy human feces and identified as Klebsiella pneumoniae.
  • An in silico and in vitro platform was established to screen for TMA-lyase inhibitors from Chinese herbal medicines.
  • The inhibitory effects of selected compounds, β-sitosterol and resveratrol, were evaluated using K. pneumoniae as a bioassay indicator.
  • This research demonstrates the potential of β-sitosterol and resveratrol to inhibit gut microbiota-mediated choline metabolism.

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