Expansion and Differentiation of Human Embryonic Stem Cells to Endoderm Progeny in a Microcarrier Stirred-Suspension Culture

被引:127
作者
Lock, Lye T. [1 ]
Tzanakakis, Emmanuel S. [1 ,2 ]
机构
[1] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA
[2] New York State Ctr Excellence Bioinformat & Life, Buffalo, NY USA
基金
美国国家卫生研究院;
关键词
PRIMITIVE STREAK FORMATION; DEFINITIVE ENDODERM; VISCERAL ENDODERM; MOUSE; EXPRESSION; GASTRULATION; GENERATION; INDUCTION; GENES;
D O I
10.1089/ten.tea.2008.0455
中图分类号
Q813 [细胞工程];
学科分类号
摘要
Embryonic stem cells (ESCs) with their abilities for extensive proliferation and multi-lineage differentiation can serve as a renewable source of cellular material in regenerative medicine. However, the development of processes for large-scale generation of human ESCs (hESCs) or their progeny will be necessary before hESC-based therapies become a reality. We hypothesized that microcarrier stirred-suspension bioreactors characterized by scalability, straightforward operation, and tight control of the culture environment can be used for hESC culture and directed differentiation. Under appropriate conditions, the concentration of hESCs cultured in a microcarrier bioreactor increased 34- to 45-fold over 8 days. The cells retained the expression of pluripotency markers such as OCT3/4A, NANOG, and SSEA4, as assessed by quantitative PCR, immunocytochemistry, and flow cytometry. We further hypothesized that hESCs on microcarriers can be induced to definitive endoderm (DE) when incubated with physiologically relevant factors. In contrast to embryoid body cultures, all hESCs on microcarriers are exposed to soluble stimuli in the bulk medium facilitating efficient transition to DE. After reaching a peak concentration, hESCs in microcarrier cultures were incubated in medium containing activin A, Wnt3a, and low concentration of serum. More than 80% of differentiated hESCs coexpressed FOXA2 and SOX17 in addition to other DE markers, whereas the expression of non-DE genes was either absent or minimal. We also demonstrate that the hESC-to-DE induction in microcarrier cultures is scalable. Our findings support the use of microcarrier bioreactors for the generation of endoderm progeny from hESCs including pancreatic islets and liver cells in therapeutically useful quantities.
引用
收藏
页码:2051 / 2063
页数:13
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