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Cui T, Xu F, Wang J, Li W, Gao Y, Li X, Yang K, Zhang W, Ge F, Tao Y. Polydopamine Nanocarriers with Cascade-Activated Nitric Oxide Release Combined Photothermal Activity for the Therapy of Drug-Resistant Bacterial Infections. ACS Infect Dis 2024; 10:2018-2031. [PMID: 38743862 DOI: 10.1021/acsinfecdis.4c00021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Antibiotic abuse leads to increased bacterial resistance, and the surviving planktonic bacteria aggregate and secrete extracellular polymers to form biofilms. Conventional antibacterial agents find it difficult to penetrate the biofilm, remove the bacteria wrapped in it, and produce an excellent therapeutic effect. In this study, a dual pH- and NIR-responsive nanocomposite (A-Ca@PDA) was developed to remove drug-resistant bacteria through a cascade of catalytic nitric oxide (NO) release and photothermal clearance. NO can melt in the outer package of the biofilm, facilitating the nanocomposites to have better permeability. Thermal therapy further inhibits the growth of planktonic bacteria. The locally generated high temperature and the burst release of NO together aggravate the biofilm collapse and bacterial death after NIR irradiation. The nanocomposites achieved a remarkable photothermal conversion efficiency of 47.5%, thereby exhibiting significant advancements in energy conversion. The nanocomposites exhibited remarkable efficacy in inhibiting multidrug-resistant (MDR) Escherichia coli and MDR Staphylococcus aureus, thus achieving an inhibition rate of >90%. Moreover, these nanocomposites significantly improved the wound-healing process in the MDR S. aureus-infected mice. Thus, this novel nanocomposite offers a novel strategy to combat drug-resistant bacterial infections.
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Affiliation(s)
- Ting Cui
- School of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, People's Republic of China
| | - Feiyang Xu
- School of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, People's Republic of China
| | - Jun Wang
- School of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, People's Republic of China
| | - Wanzhen Li
- School of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, People's Republic of China
| | - Yuan Gao
- School of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, People's Republic of China
| | - Xing Li
- School of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, People's Republic of China
| | - Kai Yang
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection & School for Radiological and Interdisciplinary Sciences (RADX), Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou, Jiangsu 215123, People's Republic of China
| | - Weiwei Zhang
- School of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, People's Republic of China
| | - Fei Ge
- School of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, People's Republic of China
| | - Yugui Tao
- School of Biological and Food Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, People's Republic of China
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Zhou X, Cai Q, Zhao S, Ling F, Xiang G, Li L, Wang Y, Li Y, Tang X. CDs-ICG@BSA nanoparticles for excellent phototherapy and in situ bioimaging. Talanta 2024; 271:125661. [PMID: 38219322 DOI: 10.1016/j.talanta.2024.125661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 01/07/2024] [Accepted: 01/09/2024] [Indexed: 01/16/2024]
Abstract
For the diagnosis and treatment of cancer, a great challenge is the fabrication of straightforward, non-toxic, multifunctional green nanomaterials. In this study, carbon quantum dots self-assembled with indocyanine green dye at bovine serum albumin for phototherapy and in situ bioimaging are produced by a flexible hydrothermal method. We find that the synthesized nanoparticles have high tumor photothermal therapeutic activity when exposed to 808 nm light, with a photothermal conversion efficiency up to 61 %. The phototoxicity study revealed the excellent phototherapy of the nanoparticles mainly arises from photothermal therapeutic effect other than photodynamic therapy effect. Simultaneously, it allows biological imaging in the visible and near-infrared ranges because of the significant absorption at 365 nm and 840 nm. The current work offers a simple, environmentally friendly, and reasonable method for developing photothermal drugs with a high photothermal conversion efficiency in the near-infrared region, as well as good biosafety for multifunctional nanomaterials for bioimaging tumor diagnosis and direct phototherapy.
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Affiliation(s)
- Xianju Zhou
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, PR China.
| | - Qingchi Cai
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, PR China
| | - Shouchun Zhao
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, PR China
| | - Faling Ling
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, PR China
| | - Guotao Xiang
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, PR China
| | - Li Li
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, PR China.
| | - Yongjie Wang
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, PR China
| | - Yanhong Li
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, PR China
| | - Xiao Tang
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, PR China
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