In order to confirm the immuno-stimulating activity of fractionated and hydrophobized poly(maleic acid-alt-7,12-dioxaspiro-[5,61-dodec-9-ene) [poly(MA-CDA)], we evaluated exo-vivo cytokine inducing activity of the polymers using peripheral whole blood cells. The highest inducing activity of interleukin 6 (IL-6) and tumor necrosis factor-α(TNF-α) was found with the polymer with a molecular weight of ~5,000 and containing 10 mol% aniline moiety.
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