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A Mouse Model to Assess Innate Immune Response to Staphylococcus aureus Infection
Published on: February 28, 2019
Staphylococcus aureus accelerates an experimental allergic conjunctivitis by Toll-like receptor 2-dependent manner
So-Hyang Chung1, Kee-Hyun Nam, Mi-Na Kweon
1Department of Ophthalmology and Visual Science, Kangnam St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea. chungsh@catholic.ac.kr
Clinical Immunology (Orlando, Fla.)
|April 10, 2009
Summary
Staphylococcus aureus (S. aureus) colonization accelerates allergic conjunctivitis by activating TLR2 signaling, which enhances Th2-type immune responses. This leads to more severe eye inflammation and increased IgE antibody levels.
Area of Science:
- Immunology
- Ophthalmology
- Microbiology
Background:
- Allergic conjunctivitis is an inflammatory eye condition linked to Th2-type cytokines.
- Staphylococcus aureus (S. aureus) colonization is implicated in allergic conjunctivitis development.
Purpose of the Study:
- To investigate the impact of S. aureus colonization on experimental allergic conjunctivitis.
- To determine if S. aureus modifies the immune response to ovalbumin (OVA) allergen.
Main Methods:
- An experimental allergic conjunctivitis model in mice was utilized.
- Mice were challenged with OVA and inoculated with S. aureus.
- Immune responses, including cytokine and antibody levels, were measured; TLR2 knockout mice were also used.
Main Results:
- S. aureus inoculation significantly accelerated allergic conjunctivitis signs and increased IgE antibody levels.
- Elevated levels of IL-4, IL-5, IL-13, and eotaxin were observed in S. aureus-inoculated mice.
- S. aureus had no effect on allergic conjunctivitis severity in Toll-like receptor 2 knockout (TLR2(-/-)) mice.
Conclusions:
- S. aureus colonization exacerbates experimental allergic conjunctivitis.
- Activation of TLR2 signaling by S. aureus promotes Th2-type immune responses.
- TLR2 signaling is crucial for S. aureus-induced acceleration of allergic conjunctivitis.
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