Innate Immune Memory Contributes to Host Defense against Recurrent Skin and Skin Structure Infections Caused by Methicillin-Resistant Staphylococcus aureus
| Autor: | Norma V. Solis, Lloyd S. Miller, Michael R. Yeaman, Siyang Chaili, Liana C. Chan, Huiyuan Wang, Luis F. Diaz, Colin W. Johnson, Scott G. Filler, Hong K. Lee |
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| Přispěvatelé: | Pirofski, Liise-anne |
| Rok vydání: | 2017 |
| Předmět: |
Male
0301 basic medicine Gene Expression Skin infection medicine.disease_cause Medical and Health Sciences Mice Recurrence Innate 2.1 Biological and endogenous factors Aetiology Mice Knockout skin infection biology Bacterial Infections Biological Sciences Acquired immune system Infectious Diseases Staphylococcus aureus Host-Pathogen Interactions Cytokines Staphylococcal Skin Infections recurrent infection Disease Susceptibility Infection Methicillin-Resistant Staphylococcus aureus Langerin Knockout Immunology Antimicrobial peptides Microbiology Vaccine Related 03 medical and health sciences Immunity medicine Animals Innate immune system Agricultural and Veterinary Sciences Animal Prevention Inflammatory and immune system medicine.disease immunity Methicillin-resistant Staphylococcus aureus Immunity Innate Disease Models Animal Emerging Infectious Diseases 030104 developmental biology Disease Models biology.protein Parasitology Immunologic Memory Spleen |
| Zdroj: | Chan, LC; Chaili, S; Filler, SG; Miller, LS; Solis, NV; Wang, H; et al.(2017). Innate Immune Memory Contributes to Host Defense against Recurrent Skin and Skin Structure Infections Caused by Methicillin-Resistant Staphylococcus aureus. INFECTION AND IMMUNITY, 85(2). doi: 10.1128/IAI.00876-16. UCLA: Retrieved from: http://www.escholarship.org/uc/item/7068c7q0 Infection and immunity, vol 85, iss 2 |
| ISSN: | 1098-5522 0019-9567 |
| DOI: | 10.1128/iai.00876-16 |
| Popis: | Staphylococcus aureus is the leading cause of skin and skin structure infections (SSSI). The high frequency of recurring SSSI due to S. aureus , including methicillin-resistant S. aureus (MRSA) strains, despite high titers of specific antibodies and circulating T cells, implies that traditional adaptive immunity imparts incomplete protection. We hypothesized that innate immune memory contributes to the protective host defense against recurring MRSA infection. To test this hypothesis, SSSI was induced in wild-type and rag1 −/− mice in the BALB/c and C57BL/6 backgrounds. Prior infection (priming) of wild-type and rag1 −/− mice of either background afforded protection against repeat infection, as evidenced by reduced abscess severities and decreased CFU densities compared to those in naive controls. Interestingly, protection was greater on the previously infected flank than on the naive flank for wild-type and rag1 −/− mice. For wild-type mice, protective efficacy corresponded to increased infiltration of neutrophils (polymorphonuclear leukocytes [PMN]), macrophages (MΦ), Langerin + dendritic cells (LDC), and natural killer (NK) cells. Protection was associated with the induction of interleukin-17A (IL-17A), IL-22, and gamma interferon (IFN-γ) as well as the antimicrobial peptides CRAMP and mβD-3. Priming also protected rag1 −/− mice against recurring SSSI, with increased MΦ and LDC infiltration and induction of IL-22, CRAMP, and mβD-3. These findings suggest that innate immune memory, mediated by specific cellular and molecular programs, likely contributes to the localized host defense in recurrent MRSA SSSI. These insights support the development of targeted immunotherapeutic strategies to address the challenge of MRSA infection. |
| Databáze: | OpenAIRE |
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