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Kasputis T, He Y, Ci Q, Chen J. On-Site Fluorescent Detection of Sepsis-Inducing Bacteria using a Graphene-Oxide CRISPR-Cas12a (GO-CRISPR) System. Anal Chem 2024; 96:2676-2683. [PMID: 38290431 PMCID: PMC10867801 DOI: 10.1021/acs.analchem.3c05459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/02/2024] [Accepted: 01/08/2024] [Indexed: 02/01/2024]
Abstract
Sepsis is an extremely dangerous medical condition that emanates from the body's response to a pre-existing infection. Early detection of sepsis-inducing bacterial infections can greatly enhance the treatment process and potentially prevent the onset of sepsis. However, current point-of-care (POC) sensors are often complex and costly or lack the ideal sensitivity for effective bacterial detection. Therefore, it is crucial to develop rapid and sensitive biosensors for the on-site detection of sepsis-inducing bacteria. Herein, we developed a graphene oxide CRISPR-Cas12a (GO-CRISPR) biosensor for the detection of sepsis-inducing bacteria in human serum. In this strategy, single-stranded (ssDNA) FAM probes were quenched with single-layer graphene oxide (GO). Target-activated Cas12a trans-cleavage was utilized for the degradation of the ssDNA probes, detaching the short ssDNA probes from GO and recovering the fluorescent signals. Under optimal conditions, we employed our GO-CRISPR system for the detection of Salmonella Typhimurium (S. Typhimurium) with a detection sensitivity of as low as 3 × 103 CFU/mL in human serum, as well as a good detection specificity toward other competing bacteria. In addition, the GO-CRISPR biosensor exhibited excellent sensitivity to the detection of S. Typhimurium in spiked human serum. The GO-CRISPR system offers superior rapidity for the detection of sepsis-inducing bacteria and has the potential to enhance the early detection of bacterial infections in resource-limited settings, expediting the response for patients at risk of sepsis.
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Affiliation(s)
- Tom Kasputis
- Department
of Biological Systems Engineering, Virginia
Tech, Blacksburg, Virginia 24061, United States
| | - Yawen He
- Department
of Biological Systems Engineering, Virginia
Tech, Blacksburg, Virginia 24061, United States
| | - Qiaoqiao Ci
- Department
of Biological Systems Engineering, Virginia
Tech, Blacksburg, Virginia 24061, United States
| | - Juhong Chen
- Department
of Biological Systems Engineering, Virginia
Tech, Blacksburg, Virginia 24061, United States
- Department
of Bioengineering, University of California, Riverside, California 92521, United States
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Bao M, Waitkus J, Liu L, Chang Y, Xu Z, Qin P, Chen J, Du K. Micro- and nanosystems for the detection of hemorrhagic fever viruses. LAB ON A CHIP 2023; 23:4173-4200. [PMID: 37675935 DOI: 10.1039/d3lc00482a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Hemorrhagic fever viruses (HFVs) are virulent pathogens that can cause severe and often fatal illnesses in humans. Timely and accurate detection of HFVs is critical for effective disease management and prevention. In recent years, micro- and nano-technologies have emerged as promising approaches for the detection of HFVs. This paper provides an overview of the current state-of-the-art systems for micro- and nano-scale approaches to detect HFVs. It covers various aspects of these technologies, including the principles behind their sensing assays, as well as the different types of diagnostic strategies that have been developed. This paper also explores future possibilities of employing micro- and nano-systems for the development of HFV diagnostic tools that meet the practical demands of clinical settings.
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Affiliation(s)
- Mengdi Bao
- Department of Chemical and Environmental Engineering, University of California, Riverside, CA, USA.
| | - Jacob Waitkus
- Department of Chemical and Environmental Engineering, University of California, Riverside, CA, USA.
| | - Li Liu
- Department of Chemical and Environmental Engineering, University of California, Riverside, CA, USA.
| | - Yu Chang
- Department of Chemical and Environmental Engineering, University of California, Riverside, CA, USA.
| | - Zhiheng Xu
- Department of Industrial Engineering, Rochester Institute of Technology, Rochester, NY, USA
| | - Peiwu Qin
- Institute of Biopharmaceutical and Health Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Juhong Chen
- Department of Biological Systems Engineering, Virginia Tech, Blacksburg, VA, USA
| | - Ke Du
- Department of Chemical and Environmental Engineering, University of California, Riverside, CA, USA.
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Liu S, Xie T, Pei X, Li S, He Y, Tong Y, Liu G. CRISPR-Cas12a coupled with universal gold nanoparticle strand-displacement probe for rapid and sensitive visual SARS-CoV-2 detection. SENSORS AND ACTUATORS. B, CHEMICAL 2023; 377:133009. [PMID: 36439054 PMCID: PMC9678389 DOI: 10.1016/j.snb.2022.133009] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/04/2022] [Accepted: 11/16/2022] [Indexed: 05/27/2023]
Abstract
Point of care (POC) diagnosis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are particularly significant for preventing transmission of coronavirus disease 2019 (COVID-19) by any user at any given time and place. CRISPR/Cas-assisted SARS-CoV-2 assays are viewed as supplemental to RT-PCR due to simple operation, convenient use and low cost. However, most current CRISPR molecular diagnostics based on fluorescence measurement increased the difficulty of POC test with need of the additional light sources. Some instrument-free visual detection with the naked eye has limitations in probe universality. Herein, we developed a universal, rapid, sensitive and specific SARS-CoV-2 POC test that combines the outstanding DNase activity of Cas12a with universal AuNPs strand-displacement probe. The oligo trigger, which is the switch the AuNPs of the strand-displacement probe, is declined as a result of Cas12a recognition and digestion. The amount of released AuNPs produced color change which can be visual with the naked eye and assessed by UV-Vis spectrometer for quantitative detection. Furthermore, a low-cost hand warmer is used as an incubator for the visual assay, enabling an instrument-free, visual SARS-CoV-2 detection within 20 min. A real coronavirus GX/P2V instead of SARS-CoV-2 were chosen for practical application validation. After rapid virus RNA extraction and RT-PCR amplification, a minimum of 2.7 × 102 copies/mL was obtained successfully. The modular design can be applied to many nucleic acid detection applications, such as viruses, bacteria, species, etc., by simply modifying the crRNA, showing great potential in POC diagnosis.
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Affiliation(s)
- Sitong Liu
- College of Chemistry and Materials Engineering and Institute of Cosmetic Regulatory Science, Beijing Technology and Business University, Beijing 100048, PR China
| | - Tie Xie
- College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, PR China
| | - Xiaojing Pei
- College of Chemistry and Materials Engineering and Institute of Cosmetic Regulatory Science, Beijing Technology and Business University, Beijing 100048, PR China
| | - Shujing Li
- College of Chemistry and Materials Engineering and Institute of Cosmetic Regulatory Science, Beijing Technology and Business University, Beijing 100048, PR China
| | - Yifan He
- College of Chemistry and Materials Engineering and Institute of Cosmetic Regulatory Science, Beijing Technology and Business University, Beijing 100048, PR China
| | - Yigang Tong
- College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, PR China
| | - Guoqi Liu
- Biotecnovo (Beijing) Co.,LTD, Beijing Economic and Technological Development Zone, Beijing, PR China
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Huang Z, Liu S, Pei X, Li S, He Y, Tong Y, Liu G. Fluorescence Signal-Readout of CRISPR/Cas Biosensors for Nucleic Acid Detection. BIOSENSORS 2022; 12:bios12100779. [PMID: 36290917 PMCID: PMC9599699 DOI: 10.3390/bios12100779] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 08/27/2022] [Accepted: 09/07/2022] [Indexed: 05/25/2023]
Abstract
The CRISPR/Cas system is now being used extensively in nucleic acid detection applications, particularly after the trans-cleavage activity of several Cas effectors was found. A CRISPR/Cas system combined with multiple signal-readout techniques has been developed for various molecular diagnostics applications. Fluorescence is now a widely utilized dominant read-out technique in CRISPR biosensors. An in-depth understanding of various fluorescence readout types and variables affecting the fluorescence signals can facilitate better experimental designs to effectively improve the analytical performance. There are the following two commonly used types of CRISPR/Cas detection modes: the first is based on binding activity, such as Cas9 and dCas9; the second is based on cleavage activity, such as Cas12a, Cas12b, Cas13, and Cas14. In this review, fluorescence signal-readout strategies from the last 5 years based on the binding activity and cleavage activity of the CRISPR/Cas system with fundamentals and examples are fully discussed. A detailed comparison of the available fluorescent reporter sequences and design principles is summarized. Current challenges and further applications of CRISPR-based detection methods will be discussed according to the most recent developments.
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Affiliation(s)
- Zhaohe Huang
- Institute of Cosmetic Regulatory Science and College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Sitong Liu
- Institute of Cosmetic Regulatory Science and College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Xiaojing Pei
- Institute of Cosmetic Regulatory Science and College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Shujing Li
- Institute of Cosmetic Regulatory Science and College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Yifan He
- Institute of Cosmetic Regulatory Science and College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China
| | - Yigang Tong
- College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100029, China
| | - Guoqi Liu
- Biotecnovo (Beijing) Co., Ltd., Beijing Economic and Technological Development Zone, Beijing 100176, China
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