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Updated: Dec 23, 2025

Immunofluorescence to Monitor the Cellular Uptake of Human Lactoferrin and its Associated Antiviral Activity Against the Hepatitis C Virus
Published on: October 1, 2015
Lactoferrin: A Critical Mediator of Both Host Immune Response and Antimicrobial Activity in Response to Streptococcal
Jacky Lu1, Jamisha Francis1, Ryan S Doster2
1Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee 37232, United States.
Abstract:
Streptococcal species are Gram-positive bacteria responsible for a variety of disease outcomes including pneumonia, meningitis, endocarditis, erysipelas, necrotizing fasciitis, periodontitis, skin and soft tissue infections, chorioamnionitis, premature rupture of membranes, preterm birth, and neonatal sepsis. In response to streptococcal infections, the host innate immune system deploys a repertoire of antimicrobial and immune modulating molecules. One important molecule that is produced in response to streptococcal infections is lactoferrin. Lactoferrin has antimicrobial properties including the ability to bind iron with high affinity and sequester this important nutrient from an invading pathogen. Additionally, lactoferrin has the capacity to alter the host inflammatory response and contribute to disease outcome. This Review presents the most recent published work that studies the interaction between the host innate immune protein lactoferrin and the invading pathogen, Streptococcus.
Insights
Lactoferrin, an innate immune protein, combats streptococcal infections by limiting iron availability and modulating inflammation. This review explores recent research on lactoferrin
Area of Science:
- Microbiology
- Immunology
- Infectious Diseases
Background:
- Streptococcal species cause numerous human diseases, including sepsis and pneumonia.
- The host innate immune system utilizes antimicrobial molecules to combat infections.
- Lactoferrin is a key immune protein produced during streptococcal infections.
Purpose of the Study:
- To review recent research on the interaction between lactoferrin and Streptococcus.
- To highlight lactoferrin's antimicrobial and immune-modulating functions against streptococci.
Main Methods:
- Literature review of published studies.
- Analysis of lactoferrin's mechanisms of action against Streptococcus.
- Examination of lactoferrin's role in host immune response.
Main Results:
- Lactoferrin exhibits antimicrobial activity by sequestering iron, essential for bacterial growth.
- Lactoferrin can modulate the host inflammatory response during streptococcal infections.
- Recent studies elucidate novel interactions between lactoferrin and various streptococcal species.
Conclusions:
- Lactoferrin is a critical component of the innate immune defense against streptococcal pathogens.
- Understanding lactoferrin-pathogen interactions can inform therapeutic strategies.
- Further research is needed to fully harness lactoferrin's potential in treating streptococcal diseases.
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