Injectable Supramolecular Hydrogel/Microgel Composites for Therapeutic Delivery.
Injectable Supramolecular Hydrogel/Microgel Composites for Therapeutic Delivery.
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可注射的超分子水凝胶/微凝胶复合材料用于治疗性递送。
DOI:
10.1002/mabi.201800248
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发表时间:
2019-01
影响因子:
4.6
通讯作者:
Burdick JA
中科院分区:
文献类型:
--
作者:
Chen MH;Chung JJ;Mealy JE;Zaman S;Li EC;Arisi MF;Atluri P;Burdick JA
Shear-thinning hydrogels are useful for biomedical applications, from 3D bioprinting to injectable biomaterials. Although they have the appropriate properties for injection, it may be advantageous to decouple injectability from the controlled release of encapsulated therapeutics. Toward this, composites of hydrogels and encapsulated microgels are introduced with microgels that are fabricated via microfluidics. The microgel crosslinker controls degradation and entrapped molecule release, and the concentration of microgels alters composite hydrogel rheological properties. For treatment of myocardial infarction (MI), interleukin-10 (IL-10) is encapsulated in microgels and released from composites. In a rat model of MI, composites with IL-10 reduce macrophage density after 1 week and improve scar thickness, ejection fraction, cardiac output, and the size of vascular structures after 4 weeks when compared to saline injection. Improvements are also observed with the composite without IL-10 over saline, emphasizing the role of injectable hydrogels alone on tissue repair. Guest-host hyaluronic acid hydrogels are combined with covalently-crosslinked hyaluronic acid microgels with encapsulated therapeutics to create composites that are injectable and can deliver therapeutics with controlled release kinetics. Here, feasibility is demonstrated using composite hydrogels to deliver interleukin-10 in a rat MI model.
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