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2017 ; 8
(1
): 400
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A 3D magnetic tissue stretcher for remote mechanical control of embryonic stem
cell differentiation
#MMPMID28900152
Du V
; Luciani N
; Richard S
; Mary G
; Gay C
; Mazuel F
; Reffay M
; Menasché P
; Agbulut O
; Wilhelm C
Nat Commun
2017[Sep]; 8
(1
): 400
PMID28900152
show ga
The ability to create a 3D tissue structure from individual cells and then to
stimulate it at will is a major goal for both the biophysics and regenerative
medicine communities. Here we show an integrated set of magnetic techniques that
meet this challenge using embryonic stem cells (ESCs). We assessed the impact of
magnetic nanoparticles internalization on ESCs viability, proliferation,
pluripotency and differentiation profiles. We developed magnetic attractors
capable of aggregating the cells remotely into a 3D embryoid body. This magnetic
approach to embryoid body formation has no discernible impact on ESC
differentiation pathways, as compared to the hanging drop method. It is also the
base of the final magnetic device, composed of opposing magnetic attractors in
order to form embryoid bodies in situ, then stretch them, and mechanically
stimulate them at will. These stretched and cyclic purely mechanical stimulations
were sufficient to drive ESCs differentiation towards the mesodermal cardiac
pathway.The development of embryoid bodies that are responsive to external
stimuli is of great interest in tissue engineering. Here, the authors culture
embryonic stem cells with magnetic nanoparticles and show that the presence of
magnetic fields could affect their aggregation and differentiation.