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A self-adapting hydrogel based on chitosan/oxidized konjac glucomannan/AgNPs for repairing irregular wounds.
Biomaterials Science ( IF 5.8 ) Pub Date : 2020/01/21 , DOI: 10.1039/c9bm01635j
Yixin Wang 1 , Ruiqi Xie 2 , Qing Li 2 , Fangyin Dai 2 , Guangqian Lan 2 , Songmin Shang 3 , Fei Lu 2
Affiliation  

Wound dressings play a critical role in the cutaneous healing process. The uncertainty of an injury leads to an irregular wound. However, incomplete contact between a general dressing and wound reduces the effectiveness of the dressing. Therefore, self-adapting hydrogels that are adhesive, injectable, and self-healable are being developed to efficiently treat irregular skin wounds. Here, we present an approach based on dynamic Schiff-base bond formation to prepare self-adapting hydrogel dressings that automatically adapt to irregular wounds under natural conditions and sustain total contact with the injured site. Spectroscopic investigations suggested the formation of dynamic covalent Schiff-base bonds, which are closely associated with the rapid formation of the hydrogel, between the aldehyde groups of oxidized konjac glucomannan and amine groups in the backbone of protonated chitosan and protonated tranexamic acid. Rheological analysis confirmed the self-healing property of the hydrogel, that is, the recovery of the broken hydrogel network. Histological analysis indicated that this self-adapting hydrogel provides a clear advantage over the commercial hydrogel dressing (AquacelAg™) in the in vivo wound-healing process. Our rapidly gelating hydrogel formulations with self-healing ability, tissue adhesiveness, and antibacterial activity are very promising self-adapting biomaterials for repairing irregular wounds.

中文翻译:

一种基于壳聚糖/氧化魔芋葡甘露聚糖/ AgNPs的自适应水凝胶,可修复不规则伤口。

伤口敷料在皮肤愈合过程中起关键作用。伤害的不确定性导致不规则的伤口。然而,普通敷料和伤口之间的不完全接触降低了敷料的有效性。因此,正在开发具有粘性,可注射和可自愈的自适应水凝胶,以有效治疗不规则皮肤伤口。在这里,我们提出了一种基于动态席夫碱键形成的方法来制备能够在自然条件下自动适应不规则伤口并保持与受伤部位完全接触的自适应水凝胶敷料。光谱研究表明,动态共价席夫碱键的形成与水凝胶的快速形成密切相关,质化壳聚糖和质子化氨甲环酸骨架中氧化魔芋葡甘露聚糖的醛基和胺基之间的关系。流变学分析证实了水凝胶的自我修复特性,即破碎的水凝胶网络的恢复。组织学分析表明,在体内伤口愈合过程中,这种自适应水凝胶比市售水凝胶敷料(AquacelAg™)具有明显的优势。我们具有快速自我修复能力,组织粘合性和抗菌活性的快速凝胶化水凝胶制剂是非常有前途的自我修复生物材料,可修复不规则伤口。组织学分析表明,在体内伤口愈合过程中,这种自适应水凝胶比市售水凝胶敷料(AquacelAg™)具有明显的优势。我们具有快速自我修复能力,组织粘合性和抗菌活性的快速凝胶化水凝胶制剂是非常有前途的自我修复生物材料,可修复不规则伤口。组织学分析表明,在体内伤口愈合过程中,这种自适应水凝胶比市售水凝胶敷料(AquacelAg™)具有明显的优势。我们具有快速自我修复能力,组织粘附性和抗菌活性的快速凝胶化水凝胶制剂是用于修复不规则伤口的非常有前途的自适应生物材料。
更新日期:2020-03-31
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