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Critical Reviews™ in Immunology

Publicou 6 edições por ano

ISSN Imprimir: 1040-8401

ISSN On-line: 2162-6472

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 1.3 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 2.6 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00079 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.24 SJR: 0.429 SNIP: 0.287 CiteScore™:: 2.7 H-Index: 81

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Staphylococcal Superantigen Super-Domains in Immune Evasion

Volume 30, Edição 2, 2010, pp. 149-165
DOI: 10.1615/CritRevImmunol.v30.i2.40
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RESUMO

Staphylococcus aureus is a robust pathogen that is capable of growing in virtually any part of the human body, and can also survive and grow in many other species. S. aureus remains the most frequent cause of hospital-acquired infection and, with the emergence and spread of drug-resistant, hypervirulent, community-acquired strains, the specter looms of the ultimate superbug. S. aureus produces an array of immune evasion factors that target various components of host immune defense. Among them are the powerful superantigen (SAg) and SAg-like (SSL) molecules, which are coded for by genes scattered across several genomic and pathogenicity islands. The SAgs universally bind MHC (major histocompatibility complex) class II and T-cell receptors to induce profound T-cell activation, while the SSLs target a range of molecules regulating opsonophagocytosis and neutrophil function. Despite functional diferences, the SAgs and SSLs have clearly evolved from a single ancestral gene that now codes for a stable, two-domain protein, with each domain responsible for binding a diferent target molecule. This superstructure tolerates extensive surface variation, enabling a wide assortment of virulence factors targeting multiple steps in innate immunity. Notably, both the SAgs and the SSLs exhibit optimal activity for humans and non-human primates, clearly indicating that primates have been the preferred host for S. aureus evolution. This restricted function makes it difficult to assess their role in staphylococcal virulence using animal models of infection. This brief review focuses on the structural features of SAgs and SSLs and their individual functions as we currently understand them.

CITADO POR
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