Immune Response and Mechanisms of IFN-γ in Administration for Keratomycosis
Xuedong Zheng1, Tianlu Xie1, Yan Lin1
1Department of Ophthalmology, The Eye Center of the First Affiliated Hospital of Fujian Medical University, Fujian Eye Institute , Fu Zhou , P.R. , China.
Abstract:
Purpose: To investigate the immune response and mechanisms of interferon-γ (IFN-γ) in the fungal keratitis in mice. Methods: Mice were divided into two groups: group A, topical PBS four times daily post-infection; group B: topical IFN-γ four times daily post-infection. At1, 3, 5, and 7 days, the corneal lesions and inflammatory responses were observed by slit lamp, and immunofluorescence staining was performed to evaluate F4/80+ and CD4+ cells. Using ELISA, and RT-PCR to detect the expression levels of macrophage migration inhibitory factor (MIF), macrophage inflammatory protein-2 (MIP-2), IL-4, IL-10, IL-12, and IFN-γ. Results: The treatment with IFN-γ decreased clinical scores and expression levels of IL-4, increased expression of F4/80+ and CD4+ cells, whereas IL-12, MIF, and MIP-2 were expressed highly, and the peaks of IL-10 and IFN-γ move forward. Conclusion: This experiment showed that IFN-γ eye drops increase the accumulation of macrophages and shorten the duration of fungal keratitis.
Insights
Interferon-gamma (IFN-γ) eye drops effectively treat fungal keratitis in mice by increasing macrophage accumulation. This treatment shortens the duration of this serious eye infection.
Area of Science:
- Ophthalmology
- Immunology
- Microbiology
Background:
- Fungal keratitis is a severe eye infection causing significant vision loss.
- Understanding the immune response, particularly the role of interferon-gamma (IFN-γ), is crucial for developing effective treatments.
Purpose of the Study:
- To investigate the immune response and mechanisms of interferon-gamma (IFN-γ) in treating fungal keratitis in a mouse model.
- To evaluate the therapeutic potential of topical IFN-γ eye drops.
Main Methods:
- Mice with fungal keratitis were treated with topical IFN-γ or PBS.
- Corneal lesions and inflammatory markers (F4/80+, CD4+ cells, MIF, MIP-2, IL-4, IL-10, IL-12, IFN-γ) were assessed using slit lamp, immunofluorescence, ELISA, and RT-PCR.
Main Results:
- IFN-γ treatment reduced clinical scores and IL-4 levels.
- Increased F4/80+ and CD4+ cell expression was observed with IFN-γ.
- Elevated levels of IL-12, MIF, and MIP-2, with earlier peaks of IL-10 and IFN-γ, were noted.
Conclusions:
- Topical IFN-γ eye drops enhance macrophage accumulation in the cornea.
- IFN-γ treatment effectively shortens the duration of fungal keratitis in mice.
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