Linked Life Data

19006458

Source:http://linkedlifedata.com/resource/pubmed/id/19006458

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2008-12-8
pubmed:abstractText
The promise of human embryonic stem cells (hESCs) to provide an unlimited supply of cells for cell therapy depends on the availability of a controllable bioprocess for their expansion and differentiation. We describe here a robust and well-defined scale up platform for human embryoid body (EB) formation, propagation, and differentiation. The efficacy of the dynamic process as compared to the static cultivation in Petri dishes was analyzed. Our optimized conditions include specific bioreactor and impeller type, seeding and propagation parameters, and scale up. Quantitative analyses of viable cell concentrations, apoptosis percentages, and EB yield revealed 6.7-fold enhancement in the generation of hESC-derived cells after 10 cultivation days. Other metabolic indices such as glucose consumption, lactic acid production and pH all pointed to efficient cell expansion in the dynamic cultures. The hydrodynamic conditions during seeding and cultivation were found to be crucial for the EB formation and propagation. The EBs' prearrangement in the static system and EB cultivation in the Glass Ball Impeller spinner flask resulted in high EB yield, a round homogenous shape, and the fastest growth rate. The appearance of representative genes of the three germ layers as well as primitive neuronal tube organization and blood vessel formation indicated that the initial developmental events in the human EBs are not interfered by the dynamic system. Furthermore, well developed endothelial networks and contracting EBs with functional cardiac muscle were also obtained after two cultivation weeks. Collectively, our study defines the technological platform for the controlled large-scale generation of hESC-derived cells for clinical and industrial applications.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
1557-8534
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
17
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1227-41
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Establishing a dynamic process for the formation, propagation, and differentiation of human embryoid bodies.
pubmed:affiliation
Biotechnology Interdisciplinary Unit, Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't