Chemokine CXCL1/KC and Its Receptor CXCR2 Are Responsible for Neutrophil Chemotaxis in Adenoviral Keratitis
Overview
Affiliations
Epidemic keratoconjunctivitis (EKC), caused by human adenovirus (HAdV), is one of the most common ocular infections and results in corneal inflammation and subepithelial infiltrates. Adenoviral keratitis causes significant morbidity to the patients, and is characterized by infiltration of leukocytes in the corneal stroma, and expression of chemokines. The exact role of these chemokines in adenoviral infection has not been studied due to lack of animal models. Here, we have characterized the role of chemokine CXCL1/KC and receptor CXCR2 in adenoviral keratitis using a novel mouse model. Analysis of chemokine expression, leukocyte infiltration, and development of keratitis was performed by ELISA, flow cytometry, and histopathology, respectively. Deficiency of CXCL1 and CXCR2 resulted in delayed infiltration of neutrophils, but not inflammatory monocytes in HAdV-37 corneal infection. CXCL1(-/-) mice showed decreased expression of CXCL2/MIP-2, but not CCL2/MCP-1. CXCR2(-/-) mice showed increased expression of CXCL1 and CXCL2, but not CCL2. Both CXCL1(-/-) and CXCR2(-/-) mice demonstrated keratitis similar to wild-type mice. In conclusion, both CXCL1 and CXCR2 play an important role in chemokine expression and neutrophil infiltration following adenoviral corneal infection, but have a redundant role in the development of keratitis.
Mikkelsen R, Arora T, Trost K, Dmytriyeva O, Jensen S, Meijnikman A iScience. 2022; 25(12):105683.
PMID: 36561890 PMC: 9763857. DOI: 10.1016/j.isci.2022.105683.
Roy R, Zayas J, Singh S, Delgado K, Wood S, Mohamed M Elife. 2022; 11.
PMID: 35112667 PMC: 8846594. DOI: 10.7554/eLife.72071.
Human Adenovirus Species D Interactions with Corneal Stromal Cells.
Rajaiya J, Saha A, Zhou X, Chodosh J Viruses. 2021; 13(12).
PMID: 34960773 PMC: 8709199. DOI: 10.3390/v13122505.
Role of Neutrophils on the Ocular Surface.
Mun Y, Hwang J, Shin Y Int J Mol Sci. 2021; 22(19).
PMID: 34638724 PMC: 8508808. DOI: 10.3390/ijms221910386.
A New Look at Vaccine Strategies Against PPRV Focused on Adenoviral Candidates.
Rojas J, Sevilla N, Martin V Front Vet Sci. 2021; 8:729879.
PMID: 34568477 PMC: 8455998. DOI: 10.3389/fvets.2021.729879.