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Nisin Inhibition of Gram-Negative Bacteria.

Adam M Charest1, Ethan Reed1, Samantha Bozorgzadeh1

  • 1Department of Biology, University of Massachusetts, Amherst, MA 01002, USA.

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|June 27, 2024
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Summary

Nisin, a broad-spectrum bacteriocin, shows significant inhibitory activity against many Gram-negative pathogens, challenging previous beliefs. This supports nisin

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alternatives to antibioticsantimicrobial resistanceantimicrobialsbacteriabacteriocinsnisin

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Area of Science:

  • Microbiology
  • Bacteriocin Research
  • Antimicrobial Therapeutics

Background:

  • Nisin is a broad-spectrum bacteriocin.
  • Gram-negative bacteria are often resistant to bacteriocins.
  • Nisin's efficacy against Gram-negative pathogens is not well-established.

Purpose of the Study:

  • To investigate nisin's activity against a wide range of Gram-negative bacterial isolates.
  • To evaluate nisin as a potential therapeutic agent for Gram-negative infections.
  • To challenge the notion of nisin's ineffectiveness against Gram-negative bacteria.

Main Methods:

  • Screening nisin's inhibitory activity against 575 Gram-negative bacterial strains.
  • Testing isolates from 17 different bacterial genera.
  • Documenting strains sensitive and resistant to nisin.

Main Results:

  • Nisin inhibited 309 out of 575 Gram-negative strains tested.
  • Genera such as Acinetobacter, Helicobacter, Erwinia, and Xanthomonas showed high sensitivity.
  • Effectiveness was observed against plant, animal, and human pathogens.

Conclusions:

  • Nisin demonstrates promising therapeutic potential against key Gram-negative pathogens.
  • Findings challenge the prevailing view of nisin's limited efficacy against Gram-negative bacteria.
  • Nisin can be explored as a complementary therapy to combat multidrug-resistant bacteria.