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  • Title: Effect of a streptococcal preparation on the complement system.
    Author: Kato H, Yokoe N, Matsumura N, Nishida K, Ikezaki M, Hosokawa K, Hotta T, Takemura S, Yoshikawa T, Kondo M.
    Journal: Jpn J Exp Med; 1979 Oct; 49(5):343-50. PubMed ID: 529490.
    Abstract:
    Streptococcal preparation OK-432 (Picibanil), clinically being used as an immunopotentiator, has been shown to activate the complement system either through the classical or the alternative pathway in vitro [15]. In this experiment, OK-432 was found to increase serum complement level in guinea pigs, and in human without malignancy, when investigated by hemolytic assay using sensitized sheep erythrocytes (EA) for the classical pathway activity and unsensitized rabbit erythrocytes (RaE) for the alternative pathway activity. Assay of complement components revealed a significant increase in C3, but decrease in Clq, while no specific tendency was observed in C4, C5, C9, properdin, C3 activator and Cl-inhibitor. These evidences suggested that OK-432 might potentiate immune response of the host by elevating serum complement level, in addition to activate the complement system.
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