Two-Dimensional "Nanotanks" Release "Gas Bombs" through Photodynamic Cascades to Promote Diabetic Wound Healing.

IF 8.1 Q1 ENGINEERING, BIOMEDICAL Biomaterials research Pub Date : 2024-10-29 eCollection Date: 2024-01-01 DOI:10.34133/bmr.0100
Jiyuan Zou, Zhikang Su, Wen Ren, Yunxin Ye, Xuechao Yang, Tao Luo, Li Yang, Lvhua Guo
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Abstract

The emergence of multidrug-resistant (MDR) bacterial infections, particularly in diabetic wounds, represents a major challenge in clinical care due to their high mortality rate. Despite the continued use of antibiotics as the primary clinical treatment for diabetic wounds, there is an urgent need to develop antibiotic-free therapeutic strategies to combat MDR bacteria, given the limitations and resistance of antibiotics. In this study, a "nanotank", MXene@MOF@CORM-401 (MMC), was designed to target bacteria. The basis of this approach is the combination of 2-dimensional transition metal carbides/carbon nitrides (MXene), metal-organic frameworks (MOFs), and carbon monoxide-releasing molecules (CORMs). MMCs exhibit photothermal and photodynamic properties upon irradiation with near-infrared laser. The photodynamic effect generates a substantial quantity of reactive oxygen species, which subsequently triggers the release of carbon monoxide in a "gas bombs"-like manner. In vitro and in vivo experiments have demonstrated that MMC is not only biocompatible but also exhibits robust antimicrobial properties and accelerates diabetic wound healing. Consequently, this innovative 2-dimensional "nanotank" represents a promising alternative to conventional antibiotic therapies for the treatment of MDR bacterial infections in the future.

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二维 "纳米罐 "通过光动力级联释放 "气体炸弹",促进糖尿病伤口愈合
耐多药(MDR)细菌感染的出现,尤其是在糖尿病伤口中的出现,因其死亡率高而成为临床护理的一大挑战。尽管抗生素仍是临床治疗糖尿病伤口的主要药物,但鉴于抗生素的局限性和耐药性,开发无抗生素治疗策略以对抗 MDR 细菌已迫在眉睫。本研究设计了一种 "纳米罐"--MXene@MOF@CORM-401(MMC),用于靶向细菌。这种方法的基础是二维过渡金属碳化物/碳氮化物(MXene)、金属有机框架(MOFs)和一氧化碳释放分子(CORMs)的结合。在近红外激光的照射下,MMCs 具有光热和光动力特性。光动力效应会产生大量活性氧,进而引发一氧化碳以类似 "毒气弹 "的方式释放出来。体外和体内实验证明,MMC 不仅具有生物相容性,还具有强大的抗菌特性,并能加速糖尿病伤口的愈合。因此,这种创新的二维 "纳米罐 "有望在未来替代传统的抗生素疗法,用于治疗耐药菌感染。
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