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Wang Y, Jiang S, Fu Q, Wang X, Zhang Z, Lyu X, Yao X, Qu Z, Zhao Y, Huang JA, Li Y. Unmasking Bacterial Identities: Exploiting Silver Nanoparticle 'Masks' for Enhanced Raman Scattering in the Rapid Discrimination of Diverse Bacterial Species and Antibiotic-Resistant Strains. Anal Chem 2024; 96:8566-8575. [PMID: 38748451 DOI: 10.1021/acs.analchem.4c00622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Unraveling bacterial identity through Raman scattering techniques has been persistently challenging due to homogeneously amplified Raman signals across a wide variety of bacterial molecules, predominantly protein- or nucleic acid-mediated. In this study, we present an approach involving the use of silver nanoparticles to completely and uniformly "mask" adsorption on the surface of bacterial molecules through sodium borohydride and sodium chloride. This approach enables the acquisition of enhanced surface-enhanced Raman scattering (SERS) signals from all components on the bacterial surface, facilitating rapid, specific, and label-free bacterial identification. For the first time, we have characterized the identity of a bacterium, including its DNA, metabolites, and cell walls, enabling the accurate differentiation of various bacterial strains, even within the same species. In addition, we embarked on an exploration of the origin and variability patterns of the main characteristic peaks of Gram-positive and Gram-negative bacteria. Significantly, the SERS peak ratio was found to determine the inflection point of accelerated bacterial death upon treatment with antimicrobials. We further applied this platform to identify 15 unique clinical antibiotic-resistant bacterial strains, including five Escherichia coli strains in human urine, a first for Raman technology. This work has profound implications for prompt and accurate identification of bacteria, particularly antibiotic-resistant strains, thereby significantly enhancing clinical diagnostics and antimicrobial treatment strategies.
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Affiliation(s)
- Yunpeng Wang
- State Key Laboratory of Frigid Zone Cardiovascular Diseases (SKLFZCD); Research Center for Innovative Technology of Pharmaceutical Analysis, College of Pharmacy, Harbin Medical University, No. 157 Baojian Road, Nangang District, Harbin City, Heilongjiang Province 150081, China
| | - Shen Jiang
- State Key Laboratory of Frigid Zone Cardiovascular Diseases (SKLFZCD); Research Center for Innovative Technology of Pharmaceutical Analysis, College of Pharmacy, Harbin Medical University, No. 157 Baojian Road, Nangang District, Harbin City, Heilongjiang Province 150081, China
| | - Qiang Fu
- Department of Chinese Formulae, Heilongjiang University of Chinese Medicine, No. 24 Heping Road, Xiangfang District, Harbin City, Heilongjiang Province 150081, China
| | - Xiaotong Wang
- State Key Laboratory of Frigid Zone Cardiovascular Diseases (SKLFZCD); Research Center for Innovative Technology of Pharmaceutical Analysis, College of Pharmacy, Harbin Medical University, No. 157 Baojian Road, Nangang District, Harbin City, Heilongjiang Province 150081, China
| | - Zhe Zhang
- State Key Laboratory of Frigid Zone Cardiovascular Diseases (SKLFZCD); Research Center for Innovative Technology of Pharmaceutical Analysis, College of Pharmacy, Harbin Medical University, No. 157 Baojian Road, Nangang District, Harbin City, Heilongjiang Province 150081, China
| | - Xiaoming Lyu
- State Key Laboratory of Frigid Zone Cardiovascular Diseases (SKLFZCD); Research Center for Innovative Technology of Pharmaceutical Analysis, College of Pharmacy, Harbin Medical University, No. 157 Baojian Road, Nangang District, Harbin City, Heilongjiang Province 150081, China
| | - Xinyu Yao
- State Key Laboratory of Frigid Zone Cardiovascular Diseases (SKLFZCD); Research Center for Innovative Technology of Pharmaceutical Analysis, College of Pharmacy, Harbin Medical University, No. 157 Baojian Road, Nangang District, Harbin City, Heilongjiang Province 150081, China
| | - Zhangyi Qu
- School of Public Health, Harbin Medical University, No. 157 Baojian Road, Nangang District, Harbin City, Heilongjiang Province 150081, China
| | - Yingqi Zhao
- Faculty of Medicine, Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu 90014, Finland
| | - Jian-An Huang
- Faculty of Medicine, Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu 90014, Finland
| | - Yang Li
- State Key Laboratory of Frigid Zone Cardiovascular Diseases (SKLFZCD); Research Center for Innovative Technology of Pharmaceutical Analysis, College of Pharmacy, Harbin Medical University, No. 157 Baojian Road, Nangang District, Harbin City, Heilongjiang Province 150081, China
- Research Unit of Health Sciences and Technology (HST), Faculty of Medicine University of Oulu, Oulu 90014, Finland
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Tahir MA, Dina NE, Cheng H, Valev VK, Zhang L. Surface-enhanced Raman spectroscopy for bioanalysis and diagnosis. NANOSCALE 2021; 13:11593-11634. [PMID: 34231627 DOI: 10.1039/d1nr00708d] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
In recent years, bioanalytical surface-enhanced Raman spectroscopy (SERS) has blossomed into a fast-growing research area. Owing to its high sensitivity and outstanding multiplexing ability, SERS is an effective analytical technique that has excellent potential in bioanalysis and diagnosis, as demonstrated by its increasing applications in vivo. SERS allows the rapid detection of molecular species based on direct and indirect strategies. Because it benefits from the tunable surface properties of nanostructures, it finds a broad range of applications with clinical relevance, such as biological sensing, drug delivery and live cell imaging assays. Of particular interest are early-stage-cancer detection and the fast detection of pathogens. Here, we present a comprehensive survey of SERS-based assays, from basic considerations to bioanalytical applications. Our main focus is on SERS-based pathogen detection methods as point-of-care solutions for early bacterial infection detection and chronic disease diagnosis. Additionally, various promising in vivo applications of SERS are surveyed. Furthermore, we provide a brief outlook of recent endeavours and we discuss future prospects and limitations for SERS, as a reliable approach for rapid and sensitive bioanalysis and diagnosis.
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Affiliation(s)
- Muhammad Ali Tahir
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science & Engineering, Fudan University, Shanghai, 200433, Peoples' Republic of China.
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Witkowska E, Łasica AM, Niciński K, Potempa J, Kamińska A. In Search of Spectroscopic Signatures of Periodontitis: A SERS-Based Magnetomicrofluidic Sensor for Detection of Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans. ACS Sens 2021; 6:1621-1635. [PMID: 33792284 PMCID: PMC8155661 DOI: 10.1021/acssensors.1c00166] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
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Recently, Porphyromonas gingivalis, the keystone pathogen implicated
in the development of gum disease
(periodontitis), was detected in the brains of Alzheimer’s
disease patients, opening up a fascinating possibility that it is
also involved in the pathobiology of this neurodegenerative illness.
To verify this hypothesis, an unbiased, specific, and sensitive method
to detect this pathogen in biological specimens is needed. To this end, our interdisciplinary
studies demonstrate that P. gingivalis can be easily identified by surface-enhanced Raman scattering (SERS).
Moreover, based on SERS measurements, P. gingivalis can be distinguished from another common periodontal pathogen, Aggregatibacter actinomycetemcomitans, and also from
ubiquitous oral Streptococcus spp.
The results were confirmed by principal component analysis (PCA).
Furthermore, we have shown that different P. gingivalis and A. actinomycetemcomitans strains
can easily adsorb to silver-coated magnetic nanoparticles (Fe2O3@AgNPs). Thus, it is possible to magnetically
separate investigated bacteria from other components of a specimen
using the microfluidic chip. To obtain additional enhancement of the
Raman signal, the NPs adsorbed to bacterial cells were magnetically
attracted to the Si/Ag SERS platform. Afterward, the SERS spectra
could be recorded. Such a time-saving procedure can be very helpful
in rapid medical diagnostics and thus in starting the appropriate
pharmacological therapy to prevent the development of periodontitis
and associated comorbidities, e.g., Alzheimerʼs disease.
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Affiliation(s)
- Evelin Witkowska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Anna M. Łasica
- Department of Bacterial Genetics, Institute of Microbiology, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland
| | - Krzysztof Niciński
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Jan Potempa
- Department of Microbiology, Faculty of Biochemistry, Biophysics, and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland
- Oral Immunology and Infectious Diseases, University of Louisville School of Dentistry, 501 S. Preston Street, Louisville, Kentucky 40202, United States
| | - Agnieszka Kamińska
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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Yan Y, Nie Y, An L, Tang YQ, Xu Z, Wu XL. Improvement of Surface-Enhanced Raman Scattering Method for Single Bacterial Cell Analysis. Front Bioeng Biotechnol 2020; 8:573777. [PMID: 33042973 PMCID: PMC7527739 DOI: 10.3389/fbioe.2020.573777] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 08/25/2020] [Indexed: 12/26/2022] Open
Abstract
Surface-enhanced Raman scattering (SERS) is a useful tool for label-free analysis of bacteria at the single cell level. However, low reproducibility limits the use of SERS. In this study, for the sake of sensitive and reproducible Raman spectra, we optimized the methods for preparing silver nanoparticles (AgNPs) and depositing AgNPs onto a cell surface. We found that fast dropwise addition of AgNO3 into the reductant produced smaller and more stable AgNPs, with an average diameter of 45 ± 4 nm. Compared with that observed after simply mixing the bacterial cells with AgNPs, the SERS signal was significantly improved after centrifugation. To optimize the SERS enhancement method, the centrifugal force, method for preparing AgNPs, concentration of AgNPs, ionic strength of the solution used to suspend the cells, and density of the cells were chosen as impact factors and optimized through orthogonal experiments. Finally, the improved method could generate sensitive and reproducible SERS spectra from single Escherichia coli cells, and the SERS signals primarily arose from the cell envelope. We further verified that this optimal method was feasible for the detection of low to 25% incorporation of 13C isotopes by the cells and the discrimination of different bacterial species. Our work provides an improved method for generating sensitive and reproducible SERS spectra.
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Affiliation(s)
- Yingchun Yan
- Institute of New Energy and Low-carbon Technology, Sichuan University, Chengdu, China.,College of Engineering, Peking University, Beijing, China
| | - Yong Nie
- College of Engineering, Peking University, Beijing, China
| | - Liyun An
- Institute of New Energy and Low-carbon Technology, Sichuan University, Chengdu, China.,College of Engineering, Peking University, Beijing, China
| | - Yue-Qin Tang
- Institute of New Energy and Low-carbon Technology, Sichuan University, Chengdu, China
| | - Zimu Xu
- College of Engineering, Peking University, Beijing, China
| | - Xiao-Lei Wu
- College of Engineering, Peking University, Beijing, China.,Institute of Ocean Research, Peking University, Beijing, China
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