Streptococcus pyogenes Triggers Activation of the Human Contact System by Streptokinase
نویسندگان
چکیده
منابع مشابه
Streptococcus pyogenes triggers activation of the human contact system by streptokinase.
Severe invasive infectious diseases remain a major and life-threatening health problem. In serious cases, a systemic activation of the coagulation cascade is a critical complication that is associated with high mortality rates. We report here that streptokinase, a group A streptococcal plasminogen activator, triggers the activation of the human contact system. Activation of contact system facto...
متن کاملExpression of Recombinant Streptokinase from Streptococcus Pyogenes and Its Reaction with Infected Human and Murine Sera
Objective(s): Streptokinase (SKa) is an antigenic protein which is secreted by Streptococcus pyogenes. Streptokinase induces inflammation by complement activation, which may play a role in post infectious diseases. In the present study, recombinant streptokinase from S. pyogenes was produced and showed that recombinant SKa protein was recognized by infected human sera using Western blot analy...
متن کاملThe activation of human plasminogen by streptokinase.
Human plasma contains a proteolytic enzyme precursor termed plasminogen (I) or profibrinolysin (2), which, upon activation by physical agents or specific bacterial kinases, is converted to plasmin (1) or fibrinolysin (2). Streptokinase (henceforth referred to as SK), an extracellular hemolytic streptococcal product, has been a commonly used activator for human plasminogen. Two mechanisms have b...
متن کاملAllelic variants of streptokinase from Streptococcus pyogenes display functional differences in plasminogen activation.
A common mammalian defense mechanism employed to prevent systemic dissemination of invasive bacteria involves occlusion of local microvasculature and encapsulation of bacteria within fibrin networks. Acquisition of plasmin activity at the bacterial cell surface circumvents this defense mechanism, allowing invasive disease initiation. To facilitate this process, S. pyogenes secretes streptokinas...
متن کاملStreptokinase variants from Streptococcus pyogenes isolates display altered plasminogen activation characteristics - implications for pathogenesis.
Streptococcus pyogenes (group A streptococcus, GAS) secretes streptokinase, a potent plasminogen activating protein. Among GAS isolates, streptokinase gene sequences (ska) are polymorphic and can be grouped into two distinct sequence clusters (termed cluster type-1 and cluster type-2) with cluster type-2 being further divided into sub-clusters type-2a and type-2b. In this study, far-UV circular...
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ژورنال
عنوان ژورنال: Infection and Immunity
سال: 2015
ISSN: 0019-9567,1098-5522
DOI: 10.1128/iai.00180-15