The Generation of Six Clinical-Grade Human Embryonic Stem Cell Lines

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The Generation of Six Clinical-Grade Human Embryonic Stem Cell Lines Jeremy Micah Crook, Teija Tuulikki Peura, Lucy Kravets, Alexis Gina Bosman, Jeremy James Buzzard, Rachel Horne, Hannes Hentze, Norris Ray Dunn, Robert Zweigerdt, Florence Chua, Alan Upshall, Alan Colman  Cell Stem Cell  Volume 1, Issue 5, Pages 490-494 (November 2007) DOI: 10.1016/j.stem.2007.10.004 Copyright © 2007 Elsevier Inc. Terms and Conditions

Figure 1 Overview of Activities and Requirements for cGMP hESC Line Derivation, Banking, and Characterization The project commenced with the procurement of suitable embryos, paralleled by the selection, optimization, and verification of protocols inclusive of cGMP-compliant reagents and materials for hESC derivation, culture, cryopreservation, storage, and biosafety testing. Once validated, all protocols were translated to batch record and/or standard operating procedure (SOP) format for cGMP application. Qualified personnel received instruction for protocol execution according to principles of cGMP. On-site audits of selected key organizations/facilities for cGMP compliance were performed. Appropriate documentation confirming cGMP compliance was attained for all other supporting services (e.g., reagent production). cGMP activities were subsequently undertaken within an Australian Therapeutic Goods Administration (TGA) accredited cGMP facility (Q-GEN Pty Ltd) for fibroblast feeder banking followed by hESC line derivation, expansion, and cryopreservation for MCB production. All MCBs were transferred to an accredited facility for cGMP cryogenic storage. After characterization of each line, including biosafety testing, all documentation (exceeding 1000 pages per hESC line) was collated for final review and confirmation of successful cGMP line and bank production. Cell Stem Cell 2007 1, 490-494DOI: (10.1016/j.stem.2007.10.004) Copyright © 2007 Elsevier Inc. Terms and Conditions

Figure 2 Characterization of Representative cGMP hESC Line ESI-035 Indicated Undifferentiated and Pluripotent hESC Status after Derivation, Culture through Eight Passages, Cryopreservation, Thawing, and Reculture through More Than Five Passages (A) A Giemsa band karyogram showing normal female karyotype. (B) Bright-field (scale bar, 1 mm) and fluorescent (scale bar, 400 μm) microscopic images showing undifferentiated (non-cystic) colony morphology and qualitative immunocytochemistry of cells positive for transcription factors Oct-4, Nanog, and Sox-2 and extracellular matrix markers Tra 1-60 and Tra 1-81. Insets represent DAPI staining. (C) RT-PCR showing transcript expression of marker genes Oct-4, Nanog, TDGF-1, UTF-1, and Sox-2. Lane 1, 100 bp DNA ladder. (D) Quantitative flow cytometry indicating robust expression of Oct-4, alkaline phosphatase (Tra 2-54), Tra 1-60, Tra 1-81, and surface-antigen SSEA-4. (E) Histology of teratomas. Left, large (scale bar, 400 μm) and small (scale bars, 50 μm) panels illustrating H&E staining. Teratomas comprised ectoderm (neuroepithelium), endoderm (gut-like epithelium), and mesoderm (cartilage). Right, immunolabeling of ectoderm (α-GFAP), endoderm (α-Keratin Endo-A), mesoderm (α-Desmin), and proliferating cells (α-Ki67). (F) RT-PCR of in vitro-derived EBs showing transcript for IGF-2 and Hand-1 (mesodermal markers), Tubb-3 and Nestin (ectodermal markers), and H19 and Cerberus-1 (endodermal markers). Lane 1, 100 bp DNA ladder. (G) Cardiomyocyte induction. Contracting foci indicative of cardiomyocytes were typically observed proximal to or within cystic areas of an EB. Scale bar, 500 μm. Immunoreactivity (red labeling) to α-actinin and α-MHC on serial EB sections and MLC2a on seeded cells indicated the formation of cardiomyocyte clusters. Immunoreactivity to Nkx2.5 localized in the nucleus indicated that most if not all α-MHC- and MLC2a-positive cardiomyocytes costained with this cardiomyocyte-specific transcription factor. Note cross-striations typical of sarcomere structures in the middle-left and lower-right panels. Hoechst staining of cell nuclei is shown in blue. Scale bars, 50 μm. Cell nuclei in seeded cells appeared larger than EB-embedded cells at the same magnification. (H) Expression of Pdx-1 was determined by Q-PCR. On day 35, Pdx-1 levels of ESI-035 and NIH-registered reference line hES-3 are equivalent. Pdx-1-positive β-like cells (red labeling) reside within discrete regions in individual day 34 ESI-035 EBs. Inset represents DAPI staining. Error bars represent standard error of the mean. Cell Stem Cell 2007 1, 490-494DOI: (10.1016/j.stem.2007.10.004) Copyright © 2007 Elsevier Inc. Terms and Conditions