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The use of murine embryonic stem cells, alginate encapsulation, and rotary microgravity bioreactor in bone tissue engineering

Hwang, Y. S., et al. (2009). "The use of murine embryonic stem cells, alginate encapsulation, and rotary microgravity bioreactor in bone tissue engineering." Biomaterials 30 4: 499-507

The application of embryonic stem cells (ESCs) in bone tissue engineering and regenerative medicine requires the development of suitable bioprocesses that facilitate the integrated, reproducible, automatable production of clinically-relevant, scaleable, and integrated bioprocesses that generate sufficient cell numbers resulting in the formation of three-dimensional (3D) mineralised, bone tissue-like constructs. Previously, we have reported the enhanced differentiation of undifferentiated mESCs toward the osteogenic lineage in the absence of embryoid body formation. Herein, we present an efficient and integrated 3D bioprocess based on the encapsulation of undifferentiated mESCs within alginate hydrogels and culture in a rotary cell culture microgravity bioreactor. Specifically, for the first 3 days, encapsulated mESCs were cultured in 50% (v/v) HepG2 conditioned medium to generate a cell population with enhanced mesodermal differentiation capability followed by osteogenic differentiation using osteogenic media containing ascorbic acid, β-glycerophosphate and dexamethasone. 3D mineralised constructs were generated that displayed the morphological, phenotypical, and molecular attributes of the osteogenic lineage, as well mechanical strength and mineralised calcium/phosphate deposition. Consequently, this bioprocess provides an efficient, automatable, scalable and functional culture system for application to bone tissue engineering in the context of macroscopic bone formation.

Related URLs:
http://ovidsp.ovid.com/ovidweb.cgi?T=JS&CSC=Y&NEWS=N&PAGE=fulltext&D=emed9&AN=2008550758
http://sfxhosted.exlibrisgroup.com/mayo?sid=OVID:embase&id=pmid:&id=doi:10.1016%2Fj.biomaterials.2008.07.028&issn=0142-9612&isbn=&volume=30&issue=4&spage=499&pages=499-507&date=2009&title=Biomaterials&atitle=The+use+of+murine+embryonic+stem+cells%2C+alginate+encapsulation%2C+and+rotary+microgravity+bioreactor+in+bone+tissue+engineering&aulast=Hwang&pid=%3Cauthor%3EHwang+Y.-S.%3C%2Fauthor%3E&%3CAN%3E2008550758%3C%2FAN%3E

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Tags: Alginate hydrogels, Bone formation, Bone tissue engineering, Differentiation, Embryoid Bodies/cytology, Embryonic stem cells, Microgravity bioreactor, Mineralisation, Osteogenic differentiation, Osteogenic media, Regeneration, Rotary cell culture system, Three-dimensional bioprocessing