Injectable, Pore‐Forming, Perfusable Double‐Network Hydrogels Resilient to Extreme Biomechanical Stimulations

Advanced Science

Larry Lessard¹  Jianyu Li¹  Hossein Ravanbakhsh¹  Zixin He¹  Sepideh Mohammadi¹  Sareh Taheri¹  Guangyu Bao¹  Luc Mongeau¹ 

[1] Department of Mechanical Engineering McGill University Montreal QC H3A 0C3 Canada;

关键词: cytocompatible;    injectable;    microfluidics;    perfusable;    porous structures;    tissue engineering;   

DOI  :  10.1002/advs.202102627

来源: DOAJ

【 摘 要 】

Abstract Biological tissues hinge on blood perfusion and mechanical toughness to function. Injectable hydrogels that possess both high permeability and toughness have profound impacts on regenerative medicine but remain a long‐standing challenge. To address this issue, injectable, pore‐forming double‐network hydrogels are fabricated by orchestrating stepwise gelation and phase separation processes. The interconnected pores of the resulting hydrogels enable direct medium perfusion through organ‐sized matrices. The hydrogels are amenable to cell encapsulation and delivery while promoting cell proliferation and spreading. They are also pore insensitive, tough, and fatigue resistant. When tested in biomimetic perfusion bioreactors, the hydrogels maintain physical integrity under prolonged, high‐frequency biomechanical stimulations (>6000 000 cycles at 120 Hz). The excellent biomechanical performance suggests the great potential of the new injectable hydrogel technology for repairing mechanically dynamic tissues, such as vocal folds, and other applications, such as tissue engineering, biofabrication, organs‐on‐chips, drug delivery, and disease modeling.

【 授权许可】

Unknown