Milk-Derived Antimicrobial Peptide Kills Listeria as Effectively as Clinical Antibiotics
Lactoferricin, a peptide from cow's milk, inhibited four strains of Listeria monocytogenes at concentrations comparable to clinical antibiotics.
Quick Facts
What This Study Found
Lactoferricin inhibited Listeria monocytogenes (4 serotypes) at 0.3-9 micrograms/ml. Bactericidal concentrations were slightly higher. Effectiveness comparable to clinical antibiotics.
Key Numbers
How They Did This
Four Listeria strains (serotypes 1b, 2, 3, 4a) were tested against lactoferricin in standard bacteriological media. Minimum inhibitory and bactericidal concentrations were determined.
Why This Research Matters
Listeria contamination in food is a serious health threat, especially for pregnant women and immunocompromised people. A natural milk-derived peptide that kills Listeria could be used as a safe food preservative.
The Bigger Picture
Natural antimicrobial peptides from food sources could become the next generation of food preservatives and even therapeutics. Lactoferricin from ordinary cow's milk shows antibiotic-level potency against a pathogen that's especially dangerous for pregnant women and the immunocompromised.
What This Study Doesn't Tell Us
In vitro study in laboratory media. Effectiveness in actual food products may differ due to pH, salt, fats, and other food components. Only Listeria tested.
Questions This Raises
- ?Could lactoferricin be added to food products as a natural preservative against Listeria?
- ?Does lactoferricin work against other food-borne pathogens?
Trust & Context
- Key Stat:
- 0.3-9 mcg/ml Lactoferricin inhibited Listeria at very low concentrations, comparable to clinical antibiotic effectiveness
- Evidence Grade:
- Moderate — in vitro study with clear dose-response data against multiple Listeria serotypes. Lab media conditions may differ from real food environments.
- Study Age:
- Published in 1992 (34 years ago). Lactoferricin has since been extensively studied and is recognized as a potent antimicrobial peptide.
- Original Title:
- Inactivation of Listeria monocytogenes by Lactoferricin, a Potent Antimicrobial Peptide Derived from Cow's Milk.
- Published In:
- Journal of food protection, 55(4), 238-240 (1992)
- Authors:
- Wakabayashi, Hiroyuki(2), Bellamy, Wayne, Takase, Mitsunori, Tomita, Mamoru
- Database ID:
- RPEP-00252
Evidence Hierarchy
Frequently Asked Questions
What is lactoferricin?
Lactoferricin is a small antimicrobial peptide naturally present in cow's milk, derived from the protein lactoferrin. It kills bacteria by disrupting their cell membranes.
Why is killing Listeria important?
Listeria monocytogenes causes listeriosis — a serious infection from contaminated food that is especially dangerous for pregnant women (causing miscarriage), the elderly, and immunocompromised individuals. Natural antimicrobials in food could prevent these infections.
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Cite This Study
https://rethinkpeptides.com/research/RPEP-00252APA
Wakabayashi, Hiroyuki; Bellamy, Wayne; Takase, Mitsunori; Tomita, Mamoru. (1992). Inactivation of Listeria monocytogenes by Lactoferricin, a Potent Antimicrobial Peptide Derived from Cow's Milk.. Journal of food protection, 55(4), 238-240. https://doi.org/10.4315/0362-028X-55.4.238
MLA
Wakabayashi, Hiroyuki, et al. "Inactivation of Listeria monocytogenes by Lactoferricin, a Potent Antimicrobial Peptide Derived from Cow's Milk.." Journal of food protection, 1992. https://doi.org/10.4315/0362-028X-55.4.238
RethinkPeptides
RethinkPeptides Research Database. "Inactivation of Listeria monocytogenes by Lactoferricin, a P..." RPEP-00252. Retrieved from https://rethinkpeptides.com/research/wakabayashi-1992-inactivation-of-listeria-monocytogenes
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.