1
|
Huang X, Zhang Z, Chen L, Lin Y, Zeng R, Xu J, Chen S, Zhang J, Cai H, Zhou H, Sun P. Multifunctional Au nano-bridged nanogap probes as ICP-MS/SERS dual-signal tags and signal amplifiers for bacteria discriminating, quantitative detecting and photothermal bactericidal activity. Biosens Bioelectron 2022; 212:114414. [PMID: 35687957 DOI: 10.1016/j.bios.2022.114414] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/13/2022] [Accepted: 05/18/2022] [Indexed: 11/17/2022]
Abstract
Ultra-sensitive detection of pathogenic bacteria is of great significance in the early stage of bacterial infections and treatment. In this work, we report a novel strategy using multifunctional Au nano-bridged nanogap nanoparticles (Au NNPs)-based sandwich nanocomposites, that made of Concanavalin A-conjugated Fe3O4@SiO2 NPs (ConA-Fe3O4@SiO2 NPs)/bacteria/aptamer-modified Au NNPs (apt-Au NNPs), for bacteria discrimination and quantitative detection by surface-enhanced Raman scattering (SERS) and inductively coupled plasma mass spectrometry (ICP-MS), and subsequently photothermal antibacterial assay. The sandwich nanocomposite consists of ConA-Fe3O4@SiO2 NPs to magnetically enrich and photothermal killing bacteria, and dual-signal tags of apt-Au NNPs for both SERS sensing and ICP-MS quantification. This strategy can specifically distinguish different kinds of pathogenic bacteria, and provided a good linear relationship of Staphylococcus aureus (S. aureus) in the range from 50 to 104 CFU/mL with a detection limit of 11 CFU/mL, as well as realized ultralow amounts of bacterial detection in serum sample with high accuracy. Based on the quantitative detection, high antibacterial efficiency was monitored by ICP-MS. Overall, the established method combines bacteria discrimination, quantitative detection, and photothermal elimination with a simple and rapid process, which provides a novel way for the early diagnosis and treatment of bacterial infection.
Collapse
Affiliation(s)
- Xueqin Huang
- Department of Dermatology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, PR China; College of Pharmacy, Jinan University, Guangzhou, 510632, PR China
| | - Zhubao Zhang
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, PR China
| | - Lingzhi Chen
- Department of Dermatology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, PR China
| | - Yongjian Lin
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, PR China
| | - Runmin Zeng
- Department of Dermatology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, PR China
| | - Jun Xu
- College of Pharmacy, Jinan University, Guangzhou, 510632, PR China
| | - Shanze Chen
- Department of Dermatology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, PR China
| | - Jianglin Zhang
- Department of Dermatology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, PR China
| | - Huaihong Cai
- College of Chemistry and Materials Science, Jinan University, Guangzhou, 510632, PR China.
| | - Haibo Zhou
- Department of Dermatology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, PR China; College of Pharmacy, Jinan University, Guangzhou, 510632, PR China.
| | - Pinghua Sun
- Department of Dermatology, The Second Clinical Medical College, Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, PR China; College of Pharmacy, Jinan University, Guangzhou, 510632, PR China.
| |
Collapse
|