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ISG15 is an interferon (IFN)-α/β-inducible protein that exists as a free molecule and conjugated to target proteins (ISGylation). In vivo studies in mice have demonstrated a critical role for ISG15 in antiviral immunity. By contrast, in humans, ISG15 has been shown to have critical functions, but not in antiviral immunity. Extracellular ISG15 is essential in IFN-γ-dependent antimycobacterial immunity,...
Type I Interferons (IFN) are key cytokines in the regulation of the innate immune response. All IFNs bind to a shared cell surface receptor comprised of two subunits, IFNAR1 and IFNAR2. Together with IFN the receptors assemble to hetero-trimeric “ternary” complexes which initiate phosphorylation cascades through the intracellularly associated Janus-Kinases Jak1 and Tyk2. Detailed structure–function...
Myocardial dysfunction in group A streptococcal (GAS) toxic shock syndrome (StrepTSS) is characterized by severe biventricular dilatation and a striking reduction in ventricular performance; however, the mechanisms have not been fully elucidated. We have previously shown that pro-inflammatory cytokines are upregulated in the hearts of experimental animals with GAS bacteremia and that cardiomyocytes...
It has been shown that IL-8 is elevated in ovarian cyst fluid, ascites, serum, and tumor tissue from ovarian cancer (OVCA) patients, and increased IL-8 expression correlates with poor prognosis and survival. However, the exact role that IL-8 plays in this malignancy or whether IL-8 can regulate malignant behavior has not been established. Here we demonstrate that overexpression of IL-8 in non-IL-8-expressing...
It has been widely reported that interleukin-8 (IL-8) is overexpressed in ovarian cyst fluid, ascites, serum, and tumor tissue from ovarian cancer (OVCA) patients, and elevated IL-8 expression correlates with a poor final outcome and chemosensitivity. However, the role of IL-8 expression in the acquisition of the chemoresistance phenotype and the underlining mechanisms of drug resistance in OVCA cells...
Some patients with Group A Streptococcal toxic shock syndrome (StrepTSS) develop a unique form of cardiomyopathy characterized by global hypokinesia and reduced cardiac index. Here we investigated the immune responses of cardiomyocytes to Group A Streptococcus both in vivo and in vitro. Our data demonstrate that cardiomyocyte-derived cytokines are produced following both direct GAS stimulation and...
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