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- W2078491566 abstract "The effect of artificial model membranes on the complement system was investigated. Incubation of the model membranes with human serum resulted in consumption of complement haemolytic activity when phosphatidylserine-containing vesicles were used. The activation of the complement system appeared to proceed through the alternative pathway. This conclusion was supported by the failure of [125I]Clq to bind to the membranes suggesting that the classical pathway was not involved. Although always obtained when phosphatidylserine was present in the model membranes, the activation of complement was enhanced by the contemporaneous presence of phosphatidylethanolamine. Liposomes prepared from lipid extracts of red blood cells were also able to stimulate a concentration-dependent activation of complement. Fresh, intact erythrocytes, however, could not initiate the same effects unless opsonized by antibodies. When artificially aged in vitro, red blood cells were lysed if incubated with normal human serum or with Clq-depleted serum. However, no lysis was obtained if the 'aged' erythrocytes were incubated with serum pretreated with ammonia to destroy the C3 component of complement. It is suggested that one of the mechanisms of macrophage recognition of senescent erythrocytes might be provided by the activation of the alternative pathway of complement if phosphatidylserine becomes exposed on the surface of the aging cells." @default.
- W2078491566 created "2016-06-24" @default.
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- W2078491566 date "1986-03-03" @default.
- W2078491566 modified "2023-09-25" @default.
- W2078491566 title "Inhibition of serum complement haemolytic activity by lipid vesicles containing phosphatidylserine" @default.
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- W2078491566 doi "https://doi.org/10.1016/0014-5793(86)80350-7" @default.
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