Coupling Probiotics with CaO2 Nanoparticle-Loaded CoFeCe-LDH Nanosheets to Remodel the Tumor Microenvironment for Precise Chemodynamic Therapy

IF 10 2区 医学 Q1 ENGINEERING, BIOMEDICAL
Ruxue Si, Tingting Hu, Gareth R. Williams, Yu Yang, Shuqing Yang, Dan Yan, Ruizheng Liang, Weiping Ji
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Abstract

Chemodynamic therapy (CDT) has become an emerging cancer treatment strategy with advantages of tumor-specificity, high selectivity, and low systemic toxicity. However, it usually suffers from low therapeutic efficacy. This is caused by low hydroxyl radical (·OH) yield arising because of the relatively high pH, overexpressed glutathione, and low H2O2 concentration in the tumor microenvironment (TME). Herein, a probiotic metabolism-initiated pH reduction and H2O2 supply-enhanced CDT strategy is reported to eradicate tumors by generating ·OH, in which Lactobacillus acidophilus is coupled with CoFeCe-layered double hydroxide nanosheets loaded with CaO2 nanoparticles (NPs) as a chemodynamic platform for high-efficiency CDT (CaO2/LDH@L. acidophilus). Owing to the hypoxia tropism of L. acidophilus, CaO2/LDH@L. acidophilus exhibits increased accumulation at tumor sites compared with the CaO2/LDH. The CaO2 NPs loaded on CoFeCe-LDH nanosheets are decomposed into H2O2 in the TME. L. acidophilus metabolite-induced pH reduction (<5.5) and CaO2-mediated in situ H2O2 generation synergistically boost ·OH generation activity of the CoFeCe-LDH nanosheets, effectively damaging cancer cells and ablating tumors with a tumor inhibition rate of 96.4%, 2.32-fold higher than that of CaO2/LDH. This work demonstrates that probiotics can function as a tumor-targeting platform to remodel the TME and amplify ROS generation for highly efficient and precise CDT.

Abstract Image

耦合益生菌与CaO2纳米颗粒负载的咖啡乳酸脱氢酶纳米片重塑肿瘤微环境以实现精确的化学动力学治疗。
化学动力治疗(CDT)具有肿瘤特异性、高选择性和低全身毒性等优点,已成为一种新兴的肿瘤治疗策略。然而,它的治疗效果通常很低。这是由于肿瘤微环境(TME)中较高的pH、过表达的谷胱甘肽和较低的H2O2浓度导致羟基自由基(·OH)产率较低所致。本文报道了一种益生菌代谢启动的pH降低和H2O2供应增强CDT策略,通过产生·OH来根除肿瘤,其中嗜酸乳杆菌与含有CaO2纳米颗粒(NPs)的咖啡层双氢氧化物纳米片偶联,作为高效CDT的化学动力学平台(CaO2/LDH@L)。嗜酸的)。由于嗜酸乳杆菌的嗜氧性,CaO2/LDH@L。与CaO2/LDH相比,嗜酸杆菌在肿瘤部位的积累增加。负载在咖啡- ldh纳米片上的CaO2 NPs在TME中分解为H2O2。L. acidophilus代谢物诱导的pH降低(2)介导的H2O2原位生成协同提高了CoFeCe-LDH纳米片的·OH生成活性,有效地破坏癌细胞并吞噬肿瘤,肿瘤抑制率为96.4%,比CaO2/LDH高2.32倍。这项工作表明,益生菌可以作为肿瘤靶向平台,重塑TME并扩增ROS的产生,以实现高效和精确的CDT。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Advanced Healthcare Materials
Advanced Healthcare Materials 工程技术-生物材料
CiteScore
14.40
自引率
3.00%
发文量
600
审稿时长
1.8 months
期刊介绍: Advanced Healthcare Materials, a distinguished member of the esteemed Advanced portfolio, has been dedicated to disseminating cutting-edge research on materials, devices, and technologies for enhancing human well-being for over ten years. As a comprehensive journal, it encompasses a wide range of disciplines such as biomaterials, biointerfaces, nanomedicine and nanotechnology, tissue engineering, and regenerative medicine.
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