Deng Yi, Ouyang Xumei, Sun Jiyu, Shi Xiuyuan, Li Yunfei, Chan Yau Kei, Yang Weizhong, Peng Shaojun
College of Biomedical Engineering, School of Chemical Engineering, Sichuan University, Chengdu, 610065, China.
State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China.
Bioact Mater. 2022 Jul 31;25:748-765. doi: 10.1016/j.bioactmat.2022.07.003. eCollection 2023 Jul.
The cutaneous wound in diabetic patients frequently encounters intractable pathogenic infections due to the hyperglycemia micromilieu which is conducive to bacterial growth and multiplication. Despite the extensive clinical use of antibiotics to treat bacterial infections, the emergence of drug-resistant and super pathogens as well as the potential side effects of antibiotics have elicited alarming challenges to public health. To address this daunting concern, we devise and develop a photo-activated cascade bio-heterojunctions (C-bio-HJs) for rapid sterilization and diabetic cutaneous regeneration. In the designed C-bio-HJs, photo-generated electron-hole pairs of graphite-phase carbon nitride (g-CN) are effectively separated with the marriage of molybdenum disulfide (MoS), which achieves the augmented photodynamic antibacterial effect. Moreover, glucose oxidase (GOx) tethered on the bio-HJs catalyzes glucose into hydrogen peroxide (HO) in diabetic wounds for starvation therapy. Furthermore, Mo enables the catalysis of HO into a highly effective hydroxyl radical (·OH) for chemodynamic-photothermal combined antibacterial therapy. Both and results authenticate the cascading antibacterial properties and skin regeneration-promoting effects of the C-bio-HJs, which provide a facile strategy to combat diabetic wound healing through the synergistic GOx-primed dynamic therapies.
糖尿病患者的皮肤伤口由于有利于细菌生长和繁殖的高血糖微环境,经常会遇到难治性病原感染。尽管抗生素在临床上被广泛用于治疗细菌感染,但耐药菌和超级病原菌的出现以及抗生素的潜在副作用对公共卫生构成了惊人的挑战。为了解决这一严峻问题,我们设计并开发了一种光激活级联生物异质结(C-bio-HJs),用于快速杀菌和促进糖尿病皮肤再生。在设计的C-bio-HJs中,石墨相氮化碳(g-CN)的光生电子-空穴对通过与二硫化钼(MoS)结合而有效分离,实现了增强的光动力抗菌效果。此外,连接在生物异质结上的葡萄糖氧化酶(GOx)在糖尿病伤口中将葡萄糖催化为过氧化氢(HO)用于饥饿疗法。此外,Mo能将HO催化为高效的羟基自由基(·OH)用于化学动力-光热联合抗菌治疗。 和 结果证实了C-bio-HJs的级联抗菌特性和促进皮肤再生的作用,为通过GOx引发的协同动态疗法对抗糖尿病伤口愈合提供了一种简便策略。