Abstract:
:The development of efficient and robust methods for the cryopreservation of human embryonic stem cells (hESCs) is important for the production of master and working cell banks for future clinical applications. Such methods must meet requirements of good manufacturing practice (GMP) and maintain genetic stability of the cell line. We investigated the culture of four Shef hESC lines in gas permeable 'culture cassettes' which met GMP compliance. hESCs adhered rapidly to the membrane and colonies displayed good proliferation and expansion. After 5-7 days of culture, hESCs were cryopreserved in situ using 10% dimethyl sulphoxide in foetal calf serum at approximately 1 degrees C/min. This method was compared with a control of standard flask culture and cryopreservation in vials. Post-thaw cassette culture displayed relative proliferation ratios (fold increase above flask/cryovial culture) of 114 (Shef 4), 8.2 (Shef 5), 195 (shef 6) and 17.5 (Shef 7). The proportion of cells expressing pluripotency markers after cryopreservation was consistently greater in cassette culture than for the control with the markers SSEA3 and SSEA4 exhibiting a significant increase (P> or =0.05). The efficiency of cell line culture in cassette was associated with the overall passage number of the cell line. The procedure enables cryopreservation of relatively large quantities of hESCs in situ, whilst returning high yields of viable, undifferentiated stem cells, thereby increasing capacity to scale up with greater efficacy.
journal_name
Cryobiologyjournal_title
Cryobiologyauthors
Amps KJ,Jones M,Baker D,Moore HDdoi
10.1016/j.cryobiol.2010.03.007subject
Has Abstractpub_date
2010-06-01 00:00:00pages
344-50issue
3eissn
0011-2240issn
1090-2392pii
S0011-2240(10)00049-0journal_volume
60pub_type
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