(英文)
STAP stem-cell conversion culture
1. To establish STAP stem-cell lines, STAP cell clusters were transferred to ACTH-containing medium on MEF feeder cells (several clusters, up to a dozen clusters, per well of 96-well plates).
IMPORTANT
(i) ACTH (1-24) is available from American Peptide and other companies. We used ACTH synthesized by Kurabo on consignment. The composition of this medium is GMEM, 15% Knockout Serum ReplacementTM (KSR, Invitrogen), 1 × non-essential amino acids (NEAA), 1 × Sodium Pyruvate, 10-4M 2-mercaptoethanol, 1000 U/ml LIF, and 10 µM ACTH . The STAP cell cluster was isolated, dissected into small pieces as in the case of injection into blastocysts as shown in Figure 4a (Obokata et al. Nature, 2014a), and seeded on mouse embryonic fibroblast feeder cells in the ACTH medium.
(ii) ACTH-containing medium was purchased from DS Pharma Biomedical (Osaka, Japan) as StemMedium@.
