国内团队：治疗幽门螺杆菌感染的新型纳米药物 | 热心肠日报

胃酸驱动的纳米马达释放抗生素在体内治疗幽门螺杆菌感染

10.1002/smll.202006877

02-23, Article

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Helicobacter pylori (H. pylori) infection has ≈75% probability of causing gastric cancer, so it is considered to be the strongest single risk factor for gastric malignancies. However, the harsh gastric acid environment has created obstacles to medical treatment. This work reports a nanomotor with a bottle‐shaped container that can be loaded with small molecules of clarithromycin, nano calcium peroxide (CaO2), and Pt nanoparticles (Pt NPs) by ultrasound. Nanomotors can quickly consume gastric acid through the chemical reaction of CaO2 to temporarily neutralize gastric acid. The product hydrogen peroxide (H2O2) is catalytically decomposed into a large amount of oxygen (O2) by Pt NPs. The local concentration gradient of O2 bubbles causes it to be expelled from the nanobottles through a narrow opening, and then push the nanobottles forward to provide maximum release and prodrug efficacy. Experiments in animal models show that 15 mg nanomotors can safely and quickly neutralize gastric acid in the stomach and simultaneously release prodrugs to achieve good therapeutic effects without causing acute toxicity. H. pylori burden in mice was 2.6 orders of magnitude lower than that in the control group. The stomach returns to normal pH within 1 d after administration.

First Authors:
Yang Wu

Correspondence Authors:
Xueji Zhang,Heyou Han

All Authors:
Yang Wu,Zhiyong Song,Guiyun Deng,Kai Jiang,Huajuan Wang,Xueji Zhang,Heyou Han