
- 积分
- 1405
- 威望
- 1405
- 包包
- 7439
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; V3 c3 G) }, v7 }" ?1 ]doi:10.1038/srep085778 G) C+ \6 ~8 L- B2 {+ O
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' K6 J4 p: z) R% ?" S9 X! TPrecision Assembly of Complex Cellular Microenvironments using Holographic Optical Tweezers$ m5 ^' r) i- E: \+ R) A
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Glen R. Kirkham, Emily Britchford, Thomas Upton, James Ware, Graham M. Gibson, Yannick Devaud, Martin Ehrbar, Miles Padgett, Stephanie Allen, Lee D. Buttery & Kevin Shakesheff6 Q: ]% Z( p0 E, [. g
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* p+ O4 v _% I: _The accurate study of cellular microenvironments is limited by the lack of technologies that can manipulate cells in 3D at a sufficiently small length scale. The ability to build and manipulate multicellular microscopic structures will facilitate a more detailed understanding of cellular function in fields such as developmental and stem cell biology. We present a holographic optical tweezers based technology to accurately generate bespoke cellular micro-architectures. Using embryonic stem cells, 3D structures of varying geometries were created and stabilized using hydrogels and cell-cell adhesion methods. Control of chemical microenvironments was achieved by the temporal release of specific factors from polymer microparticles positioned within these constructs. Complex co-culture micro-environmental analogues were also generated to reproduce structures found within adult stem cell niches. The application of holographic optical tweezers-based micromanipulation will enable novel insights into biological microenvironments by allowing researchers to form complex architectures with sub-micron precision of cells, matrices and molecules.
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