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    Cryo Letters. 2001 Jan-Feb;22(1):43-50.

    Cryopreservation of Taxus chinensis suspension cell cultures.

    Kim SI, Choi HK, Son JS, Yun JH, Jang MS, Kim HR, Song JY, Kim JH, Choi HJ, Hong SS.

    Samyang Genex Biotech Research Institute,63-2, Hwaam-Dong, Yusung-Gu, Taejon, 305-348, Korea.

    A simple cryopreservation method for suspension cells of Taxus chinensis was established. In this procedure 7 days old suspension cells were used without any pre-culture treatment. At first, cells were incubated in cryoprotectant solution (0.5M DMSO and 0.5M glycerol) on ice for 30 min and then frozen at a cooling rate of 1 degree C/min to -40 degrees C prior to immersion in liquid nitrogen. The average viability of frozen-thawed cells was between 30 to 40%. The recovery of cryopreserved cells in liquid nitrogen for 1 month was accomplished. After rapid thawing, cells were transferred to solid medium and cultivated for 4-6 weeks. The treatment of trehalose as a cryoprotectant enhanced re-growth of frozen-thawed cells. The stable maintenance of paclitaxel biosynthetic ability in cryopreserved cells was confirmed by comparing with that of regularly sub-cultured suspension cells.

    PMID: 11788843 [PubMed - indexed for MEDLINE]

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