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• W1985752844 abstract "We have previously reported on the presence of proenzymes and inhibitors of the contact system in ascitic fluid. Malignancy-related ascites was also found to contain both high and low molecular weight kininogen (HK and LK). On this basis we have studied a possible activation of the contact system in ascites. Generation of amidolytic activity towards the chromogenic substrate S-2302 after incubation with dextran sulphate (DXS), was found in ascites from patients with gastrointestinal cancer, but not in ascites from patients with benign liver disease. It is concluded that malignancy-related ascites allows contact activation to take place, while benign ascites does not. This activation process, generating bradykinin, could possibly be of relevance to the mechanism of ascites generation. Plasma samples from patients with ascites were also tested in relation to activation of the contact system. Activation was evaluated by immunoblotting, studying the disappearance of intact HK after the initiation of activation with different concentrations of DXS. In control plasma, activation took place at low concentrations of DXS (25 - 50 micrograms/ml). In plasma samples from patients with malignancy-related or benign ascites, contact activation was depressed. In some samples concentrations of DXS up to 1 mg/ml, were not able to activate the contact system at all. Concentrations of proenzymes and relevant inhibitors in the contact system, HK and total protein were also determined. We found the concentration of prekallikrein to be positively correlated with the degree of activation. Concentrations of inhibitors such as C1-inhibitor, did not show any correlation with activation." @default.
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• W1985752844 date "1994-11-01" @default.
• W1985752844 modified "2023-09-26" @default.
• W1985752844 title "Dextran sulphate activation of the contact system in plasma and ascites" @default.
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• W1985752844 doi "https://doi.org/10.1016/0049-3848(94)90165-1" @default.
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