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Kim JK, Yun HY, Kim JS, Kim W, Lee CS, Kim BG, Jeong HJ. Development of fluorescence-linked immunosorbent assay for rapid detection of Staphylococcus aureus. Appl Microbiol Biotechnol 2024; 108:2. [PMID: 38153552 DOI: 10.1007/s00253-023-12836-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 09/22/2023] [Accepted: 09/30/2023] [Indexed: 12/29/2023]
Abstract
Staphylococcus aureus is a major pathogen that causes infections and life-threatening diseases. Although antibiotics, such as methicillin, have been used, methicillin-resistant S. aureus (MRSA) causes high morbidity and mortality rates, and conventional detection methods are difficult to be used because of time-consuming process. To control the spread of S. aureus, a development of a rapid and simple detection method is required. In this study, we generated a fluorescent anti-S. aureus antibody, and established a novel fluorescence-linked immunosorbent assay (FLISA)-based S. aureus detection method. The method showed high sensitivity and low limit of detection toward MRSA detection. The assay time for FLISA was 5 h, which was faster than that of conventional enzyme-linked immunosorbent assay (ELISA) or rapid ELISA. Moreover, the FLISA-based detection method was applied to diagnose clinically isolated MRSA samples that required only 5.3 h of preincubation. The FLISA method developed in this study can be widely applied as a useful tool for convenient S. aureus detection. KEY POINTS: • A fluorescence-linked immunosorbent assay-based S. aureus detection method • Simultaneous quantification of a maximum of 96 samples within 5 h • Application of the novel system to diagnosis clinical isolates.
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Affiliation(s)
- Joo-Kyung Kim
- Interdisciplinary Program for Biochemical Engineering and Biotechnology, Seoul National University, Seoul, 08826, South Korea
| | - Hyun-Young Yun
- Department of Biological and Chemical Engineering, Hongik University, Sejong, 30016, South Korea
| | - Jae-Seok Kim
- Department of Laboratory Medicine, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seoul, 05355, South Korea
| | - Wooseong Kim
- College of Pharmacy and Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, South Korea
| | - Chang-Soo Lee
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon, 34134, South Korea
| | - Byung-Gee Kim
- Interdisciplinary Program for Biochemical Engineering and Biotechnology, Seoul National University, Seoul, 08826, South Korea
| | - Hee-Jin Jeong
- Department of Biological and Chemical Engineering, Hongik University, Sejong, 30016, South Korea.
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Shi X, Baracho GV, Lomas WE, Song HW, Widmann SJ, Tyznik AJ. Co-staining with Fluorescent Antibodies and Antibody-Derived Tags for Cell Sorting Prior to CITE-Seq. Methods Mol Biol 2024; 2779:287-303. [PMID: 38526791 DOI: 10.1007/978-1-0716-3738-8_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
The paired detection of the transcriptome and proteome at single-cell resolution provides exquisite insight to immune mechanisms in health and disease. Here, we describe a detailed protocol wherein we combine cellular indexing of transcriptomes and epitopes by sequencing (CITE-Seq), a technique utilizing antibody-derived tags (ADTs) to profile mRNA and proteins simultaneously via sequencing, with fluorescence-activated cell sorting to enrich cell populations. Our protocol provides step-by-step guidance on co-staining cells with both fluorescent antibodies and ADTs simultaneously, instructions on cell sorting and an overview of the single-cell capture workflow using the BD Rhapsody™ system. This method is useful for in-depth single-cell characterization on sorted rare cell populations.
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Cox KE, Turner MA, Amirfakhri S, Lwin TM, Hosseini M, Ghosh P, Obonyo M, Murakami T, Hoffman RM, Yazaki PJ, Bouvet M. Humanized Anti-Carcinoembryonic Antigen Antibodies Brightly Target and Label Gastric Cancer in Orthotopic Mouse Models. J Surg Res 2024; 293:701-708. [PMID: 37839102 DOI: 10.1016/j.jss.2023.08.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 07/31/2023] [Accepted: 08/26/2023] [Indexed: 10/17/2023]
Abstract
INTRODUCTION Gastric cancer poses a major therapeutic challenge. Improved visualization of tumor margins at the time of gastrectomy with fluorescent tumor-specific antibodies could improve outcomes. The present report demonstrates the potential of targeting gastric cancer with a humanized anti-carcinoembryonic antigen (CEA) antibody in orthotopic mouse models. METHODS MKN45 cells were injected subcutaneously into nude mice to establish xenograft models. Tumor fragments collected from subcutaneous models were then implanted into the greater curvature of the stomach to establish orthotopic models. For tumor labeling, a humanized anti-CEA antibody (M5A) and IgG as a control, were conjugated with the near-infrared dye IRDye800CW. Time (24-72 h) and dose (50-100 μg) response curves were performed in subcutaneous models. Orthotopic models received 50 μg of M5A-IR800 or 50 μg IgG-IR800 as a control and were imaged after 72 h. Fluorescence imaging was performed on the mice using the LI-COR Pearl Imaging System. RESULTS In subcutaneous models, tumor to background ratios (TBRs) reached 8.85 at 72 h. Median TBRs of orthotopic model primary tumors were 6.25 (interquartile range [IQR] 6.03-7.12) for M5A-IR800 compared to 0.42 (IQR 0.38-0.54) for control. Abdominal wall metastasis median TBRs were 13.52 (IQR 12.79-13.76) for M5A-IR800 and 3.19 (IQR 2.65-3.73) for the control. Immunohistochemistry confirmed CEA expression within tumors. CONCLUSIONS Humanized anti-CEA antibodies conjugated to near-infrared dyes provide specific labeling of gastric cancers in mouse models. Orthotopic models demonstrated bright and specific labeling with TBRs greater than ten times that of control. This tumor-specific fluorescent antibody is a promising potential clinical tool for improving visualization of gastric cancer margins at time of surgical resection.
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Affiliation(s)
- Kristin E Cox
- Department of Surgery, University of California San Diego, La Jolla, California; Department of Surgery, VA San Diego Healthcare System, La Jolla, California
| | - Michael A Turner
- Department of Surgery, University of California San Diego, La Jolla, California; Department of Surgery, VA San Diego Healthcare System, La Jolla, California
| | - Siamak Amirfakhri
- Department of Surgery, University of California San Diego, La Jolla, California; Department of Surgery, VA San Diego Healthcare System, La Jolla, California
| | - Thinzar M Lwin
- Department of Surgical Oncology, City of Hope National Medical Center, Duarte, California
| | - Mojgan Hosseini
- Department of Pathology, University of California San Diego, La Jolla, California
| | - Pradipta Ghosh
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, California; Department of Medicine, University of California San Diego, La Jolla, California
| | - Marygorret Obonyo
- Department of Medicine, University of California San Diego, La Jolla, California
| | - Takashi Murakami
- Department of Microbiology, Saitama Medical University, Saitama, Japan
| | - Robert M Hoffman
- Department of Surgery, University of California San Diego, La Jolla, California; Department of Surgery, VA San Diego Healthcare System, La Jolla, California; AntiCancer Inc, San Diego, California
| | - Paul J Yazaki
- Department of Immunology & Theranostics, Beckman Research Institute of the City of Hope, Duarte, California
| | - Michael Bouvet
- Department of Surgery, University of California San Diego, La Jolla, California; Department of Surgery, VA San Diego Healthcare System, La Jolla, California.
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Povedailo VA, Lysenko IL, Tikhomirov SA, Yakovlev DL, Tsybulsky DA, Kruhlik AS, Fan F, Martynenko-Makaev YV, Sharko OL, Duong PV, Minh PH, Shmanai VV. Fluorescent Properties of Carboxyfluorescein Bifluorophores. J Fluoresc 2020; 30:629-635. [PMID: 32300977 DOI: 10.1007/s10895-020-02535-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 12/30/2019] [Accepted: 04/02/2020] [Indexed: 11/24/2022]
Abstract
Bright fluorescent probes with enhanced intensities in the fluorescein channel are of great value for plenty of biological applications. To design effective probes one should introduce as many as possible fluorophores to the biomolecule while leaving its native structure as intact as possible. To reach this compromise, we designed and synthesized fluorescein bifluorophores on the 3,5-diaminobenzoic acid scaffold, which allows for insertion of two fluorophores at one modification site of a biomolecule. Rigid structure of the branching linker group allows to minimize self-quenching the fluorophores. However, despite the structure similarities of fluorescein isomers (5-FAM and 6-FAM), different photophysical behavior was observed for the corresponding bifluorophores. Here we made efforts to get insight into these effects with the focus on the media viscosity impact.
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Affiliation(s)
- Vladimir A Povedailo
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimost' Ave, Minsk, 220072, Belarus
| | - Ivan L Lysenko
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganova str, 220072, Minsk, Belarus
| | - Sergei A Tikhomirov
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimost' Ave, Minsk, 220072, Belarus
| | - Dmitrii L Yakovlev
- B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 68 Nezavisimost' Ave, Minsk, 220072, Belarus
| | - Dmitry A Tsybulsky
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganova str, 220072, Minsk, Belarus
| | - Aliaksandr S Kruhlik
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganova str, 220072, Minsk, Belarus
| | - Fan Fan
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganova str, 220072, Minsk, Belarus
| | - Yury V Martynenko-Makaev
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganova str, 220072, Minsk, Belarus
| | - Olga L Sharko
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganova str, 220072, Minsk, Belarus
| | - Pham V Duong
- Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam
| | - Pham H Minh
- Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam
| | - Vadim V Shmanai
- Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, 13 Surganova str, 220072, Minsk, Belarus.
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Yamaguchi N. Rapid On-Site Detection and Quantification of Foodborne Pathogens Using Microfluidic Devices. Methods Mol Biol 2019; 1918:57-66. [PMID: 30580399 DOI: 10.1007/978-1-4939-9000-9_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
The potential for foodborne infectious disease outbreaks has increased not only on a local scale but also on a regional and international scale. Simple, rapid, and accurate methods to enumerate pathogenic bacteria in food and drink are required to prevent the spread of these bacteria. Here, I describe applications of a microfluidic device for on-chip fluorescent staining and semiautomated counting of target bacteria in food samples.
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