Abstract
Ability of Sugi basic protein (SBP)-pullulan conjugate to elicit the Arthus reaction was found to be markedly reduced, about 100 times lower than that of native SBP. To analyze this reduced ability, activation of complement by immune complex consisting of SBP-pullulan and anti-SBP antibodies was studied. Tests for complement consumption, C3 conversion and cleavage of factor B revealed that immune complex formed with SBP-pullulan is incapable of supporting efficient activation of the complement system. Previously, we have shown data suggesting that SBP-pullulan conjugate would be a good candidate for desensitization therapy against cedar pollinosis. The results presented in this paper provide additional support for the suggestion.
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