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Updated: Jan 13, 2026
Immunofluorescence to Monitor the Cellular Uptake of Human Lactoferrin and its Associated Antiviral Activity Against the Hepatitis C Virus
Published on: October 1, 2015
Addition of lactoferrin increases efficacy of three Kayviruses and limits the inflammatory response in pulmonary
Katarzyna Kosznik-Kwaśnicka1, Grzegorz Stasiłojć2, Milena Grzenkowicz3,4
1Department of Medical Microbiology, Faculty of Medicine, Medical University of Gdansk, Debowa 25, 80-204, Gdansk, Poland. katarzyna.kwasnicka@gumed.edu.pl.
Abstract:
Staphylococcus aureus is a major cause of hospital-acquired pneumonia, with methicillin-resistant strains contributing significantly to prolonged illness and mortality. Methicillin-resistant strains can be responsible for up to 75% of infections in certain countries. Therefore, the problem is described as severe, and the search for alternative methods of treatment of such infections is currently one of the priorities in healthcare. Bacteriophages, although historically underutilized, are re-gaining interest for their potential in treating bacterial infections. However, they do have their limitations such as specific ranges of activity and resistance development. Combining phages with antimicrobial agents such as lactoferrin-a natural protein with antimicrobial and anti-biofilm properties-may improve treatment outcomes. In this study, we evaluated the efficacy of three Kayviruses paired with lactoferrin against MRSA in infected pulmonary epithelial cell cultures. The combination significantly reduced bacterial viability, protected human cells from cytotoxic effects of bacterial infection, and decreased inflammasome activation. These findings suggest that phage-lactoferrin combinations may offer a promising, safer alternative for managing MRSA-related pneumonia and reducing dependence on traditional antibiotics. KEY POINTS: •Phage lactoferrin mixture had no influence on A549 cells •Lactoferrin increased phage efficacy and reduced influence of bacteria on cells •Phage + Lf mixture limited inflammatory response similarly to phages and Lf alone.
Insights
This study explored phage-lactoferrin combinations to treat methicillin-resistant Staphylococcus aureus (MRSA) pneumonia. The combination effectively reduced bacterial viability and inflammation, offering a potential alternative to antibiotics.
Area of Science:
- Microbiology
- Infectious Diseases
- Biotechnology
Background:
- Staphylococcus aureus, particularly methicillin-resistant strains (MRSA), is a leading cause of hospital-acquired pneumonia, resulting in significant morbidity and mortality.
- The rise of antibiotic resistance necessitates the exploration of alternative therapeutic strategies for MRSA infections.
- Bacteriophages and lactoferrin show promise as antimicrobial agents, but their combined efficacy requires further investigation.
Purpose of the Study:
- To evaluate the efficacy of combining bacteriophages (Kayviruses) with lactoferrin against MRSA in an in vitro model of pneumonia.
- To assess the protective effects of the phage-lactoferrin combination on human pulmonary epithelial cells.
- To investigate the impact of the combination on bacterial viability and inflammatory responses.
Main Methods:
- Infection of pulmonary epithelial cell cultures with MRSA.
- Treatment with a combination of three specific bacteriophages (Kayviruses) and lactoferrin.
- Assessment of bacterial viability, cytotoxicity to host cells, and inflammasome activation.
Main Results:
- The phage-lactoferrin combination significantly reduced MRSA viability in infected cell cultures.
- The combination protected human pulmonary epithelial cells from MRSA-induced cytotoxic effects.
- Inflammasome activation was decreased by the phage-lactoferrin treatment, similar to individual treatments with phages or lactoferrin alone.
Conclusions:
- Phage-lactoferrin combinations demonstrate significant potential as a therapeutic strategy against MRSA pneumonia.
- This combination may offer a safer alternative to conventional antibiotics, reducing the risk of resistance development.
- Further research into phage-lactoferrin synergy could lead to novel treatments for challenging bacterial infections.
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