An Optogenetic Platform to Dynamically Control the Stiffness of Collagen Hydrogels.

An Optogenetic Platform to Dynamically Control the Stiffness of Collagen Hydrogels.
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DOI:
10.1021/acsbiomaterials.0c01488
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发表时间:
2021-02-08
影响因子:
5.8
通讯作者:
Wilson MZ
Wilson MZ
中科院分区:
工程技术2区
文献类型:
--
作者:
Hopkins E;Valois E;Stull A;Le K;Pitenis AA;Wilson MZ

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The extracellular matrix (ECM) is comprised of a meshwork of biomacromolecules whose composition, architecture, and macroscopic properties, such as mechanics, instruct cell fate decisions during development and disease progression. Current methods implemented in mechanotransduction studies either fail to capture real-time mechanical dynamics or utilize synthetic polymers that lack the fibrillar nature of their natural counterparts. Here we present an optogenetic-inspired tool to construct light-responsive ECM mimetic hydrogels comprised exclusively of natural ECM proteins. Optogenetic tools offer seconds temporal resolution and submicron spatial resolution, permitting researchers to probe cell signaling dynamics with unprecedented precision. Here we demonstrated our approach of using SNAP-tag and its thiol-targeted substrate, benzylguanine-maleimide, to covalently attach blue-light responsive proteins to collagen hydrogels. The resulting material (OptoGel) –in addition to encompassing the native biological activity of collagen– stiffens upon exposure to blue light and softens in the dark. Optogels have immediate use in dissecting the cellular response to acute mechanical inputs and may also have applications in next-generation bio-interfacing prosthetics.
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