SELECTIVE REDUCTION OF CYSTEINE RESIDUES IN IL-17 ANTIBODIES

To provide methods for selectively reducing CysL97 in a preparation of IL-17 antibodies or antigen binding fragments thereof (e.g., a preparation of secukinumab antibodies) that have been recombinantly produced by mammalian cells.SOLUTION: Provided is a method for selectively reducing CysL97 in a pr...

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Hauptverfasser: MARKUS HEITZMANN, JOHANN WINKLER
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide methods for selectively reducing CysL97 in a preparation of IL-17 antibodies or antigen binding fragments thereof (e.g., a preparation of secukinumab antibodies) that have been recombinantly produced by mammalian cells.SOLUTION: Provided is a method for selectively reducing CysL97 in a preparation of IL-17 antibodies that have been recombinantly produced by mammalian cells. The method comprises a) contacting the preparation with at least one reducing agent in a system to form a reducing mixture; and b) incubating the reducing mixture while maintaining a volumetric oxygen mass-transfer coefficient (kLa*) in the system of ≤0.37h-1 being calculated by adapting a dissolved oxygen curve to a saturation curve. Prior to step a), the initial percent oxygen saturation in the preparation is adjusted to at least about 60%, as measured using an oxygen probe calibrated at 25°C.SELECTED DRAWING: None 【課題】哺乳動物細胞によって組換え産生されたIL-17抗体又はそれらの抗原結合断片の調製物(例えば、セクキヌマブ抗体の調製物)中のCysL97を選択的に還元する方法を提供する。【解決手段】哺乳動物細胞によって組換え産生されたIL-17抗体の調製物中のCysL97を選択的に還元する方法であって、a)容器内で前記調製物を少なくとも1つの還元剤と接触させて還元性混合物を形成するステップ、及び、b)溶存酸素曲線を飽和曲線に当てはめることによって計算される≦0.37h-1の酸素物質移動容量係数(kLa*)を容器内で維持しながら前記還元性混合物をインキュベートするステップを含み、ステップa)の前、前記容器において、前記組成物の初期酸素飽和度パーセントが、25℃で較正した酸素プローブを使用して測定した場合、少なくとも60%に調整されている、方法である。【選択図】なし