A method of producing a taxane-type diterpene and method of...

C - Chemistry – Metallurgy – 12 – P

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C12P 17/02 (2006.01) C12N 5/00 (2006.01) C12N 5/04 (2006.01)

Patent

CA 2153986

This invention relates to a method of producing a taxane-type diterpene(s) wherein tissues or cells of a plant which produces taxane-type diterpene(s) is cultured in the presence of at least one selected from the group consisting of jasmonic acids, compounds containing a heavy metal, complex ions containing a heavy metal, heavy metal ions, amines and antiethylene agents, a method of producing a taxane-type diterpene wherein the tissues or the cells of the plant are cultured by controlling the oxygen concentration in a gas phase in a culture vessel to less than the oxygen concentration in the atmosphere from the initial stage of the culture, or by controlling the dissolved oxygen concentration in a fluid medium which is in contact with the tissue or the cell to less than the saturated dissolved oxygen concentration at that temperature from the initial stage of the culture, a method of producing a taxane-type diterpene wherein the tissue or the cell of the plant is cultured in a culture vessel, while oxygenic gas containing 0.03 - 10 % of carbon dioxide is used as aeration gas to be introduced to the vessel, and a method of obtaining highly productive cultured cells for the taxane-type diterpene wherein cultured cells of the plant which produces the taxane-type diterpene are separated into a plurality of layers according to the difference in their specific gravities, and the cells contained in at least one layer are cultured, then highly productive cultured cells for the taxane-type diterpene are selected from among those cultured cells. The present invention allows industrial production of a taxane- type diterpene such as taxol which is useful as a therapeutic agent for cancer. -132-

Un procédé de production de diterpène de taxane consiste à mettre en culture le tissu ou la cellule d'une plante produisant un diterpène de taxane en présence d'au moins un élément choisi dans le groupe constitué d'acides jasmoniques, de composés de métaux lourds, d'ions de complexe de métaux lourds, d'ions de métaux lourds, d'amines et d'un agent résistant à l'éthylène. Un autre procédé de production d'un diterpène de taxane consiste à mettre en culture le tissu ou la cellule par régulation de l'état à partir du commencement, de sorte que la concentration d'oxygène dans la phase gazeuse se trouvant à l'intérieur de la cuve de culture soit inférieure à la concentration d'oxygène atmosphérique ou que la concentration d'oxygène dissous dans le milieu coulant en contact avec le tissu ou la cellule soit inférieur à la concentration d'oxygène dissous de saturation à cette température. Un autre procédé de production d'un diterpène de taxane consiste à mettre en culture le tissu ou la cellule dans un réservoir de culture par introduction dans le réservoir d'un gaz oxygéné contenant 0,03 à 10 % de dioxyde de carbone. Un procédé de récolte d'une cellule mise en culture capable de produire un diterpène de taxane à haut rendement consiste à répartir les cellules parmi un certain nombre de couches sur la base d'une différence de gravité spécifique, à mettre en culture les cellules contenues dans au moins une des couches, et à sélectionner la cellule cible parmi les cellules ainsi mises en culture. L'invention permet la production industrielle de diterpènes de taxane tels que le taxol, utiles comme agent anticancéreux.

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