title: Studies on neutralization of human serum bactericidal activity by sodium amylosulfate.
abstract: The synthetic anticoagulant sodium amylosulfate (SAS) at concentrations of 125 to 2,000 microgram/ml failed to completely neutralize the bactericidal activity of 80 and 50% (by volume) fresh human serum. Furthermore, SAS failed to inhibit the alternative pathway of complement activation in 80% (by volume) fresh human serum that had been chelated with 0.01 M magnesium ions plus 0.01 M ethyleneglycol-bis(beta-aminoethylether)-N,N-tetraacetic acid. However, SAS at 250 to 1,000 microgram/ml effectively neutralized the bactericidal activity of 20% (by volume) fresh human serum. Therefore, SAS (at 250 to 1,000 microgram/ml) should be used only in blood samples that have been diluted at least fivefold (less than or equal to 20% [by volume]) in suitable broth media.
mesh_terms: D000687:Amylopectin / Q000494:pharmacology*; D000925:Anticoagulants / Q000494:pharmacology*; D001770:Blood Bactericidal Activity / Q000187:drug effects*; D003165:Complement System Proteins / Q000502:physiology; D004305:Dose-Response Relationship, Drug; D004926:Escherichia coli / Q000254:growth & development; D006801:Humans
chemical_list: D000925:Anticoagulants; D003165:Complement System Proteins; C001835:amylosulfate sodium; D000687:Amylopectin