Factors to Govern Soluble and Insoluble Aggregate-formation in Monoclonal Antibodies

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  • FUKUDA Jun
    Graduate School of Agriculture, Kyoto University Bio Process Research and Development Laboratories, Production Division, Kyowa Hakko Kirin Co., Ltd.
  • IWURA Takafumi
    Bio Process Research and Development Laboratories, Production Division, Kyowa Hakko Kirin Co., Ltd.
  • YANAGIHARA Shigehiro
    Bio Process Research and Development Laboratories, Production Division, Kyowa Hakko Kirin Co., Ltd.
  • KANO Kenji
    Graduate School of Agriculture, Kyoto University

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Description

The aggregation formation of monoclonal antibodies as biopharmaceuticals induced by heat stress was evaluated by size-exclusion chromatography, and the formation rate was correlated with several physicochemical parameters of the antibodies to clarify the factors to govern the aggregate formation. The parameters we studied were: the melting temperature (Tm) and the standard enthalpy of the melting point (ΔmH°) evaluated by differential scanning calorimetry under given and common conditions; the wavelength (λmax) and the intensity (Fint) of the maximum fluorescence peak of 1-anilinonaphthalene-8-sulfonate as a probe dye; the z-average diameter (D) evaluated by dynamic light scattering; and the isoelectric point (pI) and the hydrophobic index (Hpho) of the complementarity determining region calculated from the amino acid sequence. Multivariate statistical analysis with these explanatory variables based on Akaike’s information criterion indicates that the soluble aggregate formation is negatively correlated with Tm and pI, while the insoluble aggregate formation is positively correlated with Fint and pI. Based on these results, the mechanisms of the aggregate formation and methods to prevent the formation are discussed.

Journal

  • Analytical Sciences

    Analytical Sciences 31 (12), 1233-1240, 2015

    The Japan Society for Analytical Chemistry

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