Frontiers in Microbiology (Jun 2022)

Multi-Target Antibacterial Mechanism of Moringin From Moringa oleifera Seeds Against Listeria monocytogenes

  • Yanlong Wen,
  • Yanlong Wen,
  • Yanlong Wen,
  • Wenyun Li,
  • Wenyun Li,
  • Wenyun Li,
  • Rongzhen Su,
  • Min Yang,
  • Min Yang,
  • Min Yang,
  • Nan Zhang,
  • Ximing Li,
  • Ximing Li,
  • Ximing Li,
  • Lingfei Li,
  • Lingfei Li,
  • Lingfei Li,
  • Jun Sheng,
  • Jun Sheng,
  • Yang Tian,
  • Yang Tian,
  • Yang Tian,
  • Yang Tian

DOI
https://doi.org/10.3389/fmicb.2022.925291
Journal volume & issue
Vol. 13

Abstract

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Moringin [4-(α-L-rhamnosyloxy) benzyl isothiocyanate] is an isothiocyanate from Moringa oleifera seeds. It is the bioactivated form of the glucosinolate precursor glucomoringin with various health benefits. However, few studies have examined the antibacterial activity of moringin. This study aimed to investigate the antimicrobial activity and mechanism of moringin against Listeria monocytogenes. The minimum inhibitory concentration (MIC), and growth curves were used to evaluate the bacteriostatic effect of moringin against L. monocytogenes. Transcriptome analysis by RNA sequencing was performed to elucidate the underlying mechanism of moringin against L. monocytogenes. The transcriptome results were validated. The results showed that moringin inhibited the growth of L. monocytogenes with a MIC of 400 μM. RNA sequencing results showed that the differences in the expression of genes related to the cell wall and membrane biosynthesis, phosphotransferase system (PTS), oxidative stress, energy metabolism, and DNA binding were significantly affected. As with the transcriptome results, the results of the mechanism verification found that moringin damaged the integrity of the cell wall and cell membrane, stimulated oxidative stress, interfered with energy metabolism and DNA replication, and finally led to the death of L. monocytogenes. The present study provides evidence that moringin exhibits strong antimicrobial activity against L. monocytogenes and insight into its potential mechanism.

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