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The complement anaphylatoxin, C5a has been implicated in regulation of adaptive immune responses through modulation of APC function as shown mainly in studies in mice. C5a was shown to enhance cytokine production in immature DCs, but the effect of C5a on DC function during DC activation has not been elucidated in human. In this study we investigated the effect of C5a on human monocyte derived DCs...
During classical complement pathway activation, the internal thio-ester of both C3 and C4 becomes exposed which enables C3 and C4 to bind covalently to nearby molecules. Recently, we described that C3 and C4 bind to C1q, the recognition molecule of the classical pathway, upon activation of this pathway. Covalently linked complexes between C1q and activated C4 (C1q–C4 complexes) are specific markers...
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