Hydrogels with precisely controlled integrin activation dictate vascular patterning and permeability.

Hydrogels with precisely controlled integrin activation dictate vascular patterning and permeability.
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DOI:
10.1038/nmat4954
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发表时间:
2017-09
期刊:
影响因子:
41.2
通讯作者:
Segura T
Segura T
中科院分区:
材料科学1区
文献类型:
--
作者:
Li S;Nih LR;Bachman H;Fei P;Li Y;Nam E;Dimatteo R;Carmichael ST;Barker TH;Segura T

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Integrin binding to bioengineered hydrogel scaffolds is essential for tissue regrowth and regeneration, yet not all integrin binding can lead to tissue repair. Here, we show that through engineering hydrogel materials to promote α3/α5β1 integrin binding, we can promote the formation of a space filling and mature vasculature compared to hydrogel materials that promote a αvβ3 integrin binding. In vitro, α3/α5β1 scaffolds promoted endothelial cells to sprout and branch, forming organized extensive networks that eventually reached and anastomosed with neighboring branches. In vivo, α3/α5β1 scaffolds delivering vascular endothelial growth factor (VEGF) promoted non-tortuous blood vessel formation and non-leaky blood vessels by 10-days post stroke. In contrast, materials that promote αvβ3 integrin binding promoted endothelial sprout clumping in vitro and leaky vessels in vivo. This work shows that precisely controlled integrin activation from a biomaterial can be harnessed to direct therapeutic vessel regeneration and reduce VEGF induced vascular permeability in vivo.
域间倾斜角度决定了人纤连蛋白的第九和第十FIII结构域的整联蛋白依赖性功能。
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