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Han X, Song D, Xu W, Lu L, Zhu A, Long F. CRISPR/Cas12a powered air-displacement enhanced evanescent wave fluorescence fiber-embedded microfluidic biochip for nucleic acid amplification-free detection of Escherichia coli O157:H7. JOURNAL OF HAZARDOUS MATERIALS 2024; 469:134037. [PMID: 38521032 DOI: 10.1016/j.jhazmat.2024.134037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 03/02/2024] [Accepted: 03/12/2024] [Indexed: 03/25/2024]
Abstract
Simple yet ultrasensitive and contamination-free quantification of environmental pathogenic bacteria is in high demand. In this study, we present a portable clustered regularly interspaced short palindromic repeats-associated protein 12a (CRISPR/Cas12a) powered Air-displacement enhanced Evanescent wave fluorescence Fiber-embedded microfluidic Biochip (AEFB) for the high-frequency and nucleic acid amplification-free ultrasensitive detection of Escherichia coli O157:H7. The performance of AEFB was dramatically enhanced upon employing a simple air-solution displacement process. Theoretical assays demonstrated that air-solution displacement significantly enhances evanescent wave field intensity on the fiber biosensor surface and increases the V-number in tapered fiber biosensors. Consequently, light-matter interaction is strengthened, and fluorescence coupling and collection efficiency are improved, considerably enhancing sensitivity. By integrating the CRISPR biosensing mechanism, AEFB facilitated rapid, accurate, nucleic acid amplification-free detection of E.coli O157:H7 with polymerase chain reaction (PCR)-level sensitivity (176 cfu/mL). To validate its practicality, AEFB was used to detect E.coli O157:H7 in surface water and wastewater. Comparison with RT-PCR showed a strong linear relationship (R2 = 0.9871), indicating the excellent accuracy and reliability of this technology in real applications. AEFB is highly versatile and can be easily extended to detect other pathogenic bacteria, which will significantly promote the high-frequency assessment and early-warning of bacterial contamination in aquatic environments.
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Affiliation(s)
- Xiangzhi Han
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China
| | - Dan Song
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China
| | - Wenjuan Xu
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China
| | - Laiya Lu
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China; State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Anna Zhu
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China; State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China
| | - Feng Long
- School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China.
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Cortés-Sánchez JL, Melnik D, Sandt V, Kahlert S, Marchal S, Johnson IRD, Calvaruso M, Liemersdorf C, Wuest SL, Grimm D, Krüger M. Fluid and Bubble Flow Detach Adherent Cancer Cells to Form Spheroids on a Random Positioning Machine. Cells 2023; 12:2665. [PMID: 37998400 PMCID: PMC10670461 DOI: 10.3390/cells12222665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/10/2023] [Accepted: 11/17/2023] [Indexed: 11/25/2023] Open
Abstract
In preparing space and microgravity experiments, the utilization of ground-based facilities is common for initial experiments and feasibility studies. One approach to simulating microgravity conditions on Earth is to employ a random positioning machine (RPM) as a rotary bioreactor. Combined with a suitable low-mass model system, such as cell cultures, these devices simulating microgravity have been shown to produce results similar to those obtained in a space experiment under real microgravity conditions. One of these effects observed under real and simulated microgravity is the formation of spheroids from 2D adherent cancer cell cultures. Since real microgravity cannot be generated in a laboratory on Earth, we aimed to determine which forces lead to the detachment of individual FTC-133 thyroid cancer cells and the formation of tumor spheroids during culture with exposure to random positioning modes. To this end, we subdivided the RPM motion into different static and dynamic orientations of cell culture flasks. We focused on the molecular activation of the mechanosignaling pathways previously associated with spheroid formation in microgravity. Our results suggest that RPM-induced spheroid formation is a two-step process. First, the cells need to be detached, induced by the cell culture flask's rotation and the subsequent fluid flow, as well as the presence of air bubbles. Once the cells are detached and in suspension, random positioning prevents sedimentation, allowing 3D aggregates to form. In a comparative shear stress experiment using defined fluid flow paradigms, transcriptional responses were triggered comparable to exposure of FTC-133 cells to the RPM. In summary, the RPM serves as a simulator of microgravity by randomizing the impact of Earth's gravity vector especially for suspension (i.e., detached) cells. Simultaneously, it simulates physiological shear forces on the adherent cell layer. The RPM thus offers a unique combination of environmental conditions for in vitro cancer research.
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Affiliation(s)
- José Luis Cortés-Sánchez
- Department of Microgravity and Translational Regenerative Medicine, Otto-von-Guericke University, 39106 Magdeburg, Germany; (J.L.C.-S.); (D.M.); (V.S.); (S.M.); (D.G.)
| | - Daniela Melnik
- Department of Microgravity and Translational Regenerative Medicine, Otto-von-Guericke University, 39106 Magdeburg, Germany; (J.L.C.-S.); (D.M.); (V.S.); (S.M.); (D.G.)
- Research Group “Magdeburger Arbeitsgemeinschaft für Forschung unter Raumfahrt- und Schwerelosigkeitsbedingungen” (MARS), Otto-von-Guericke University, 39106 Magdeburg, Germany
| | - Viviann Sandt
- Department of Microgravity and Translational Regenerative Medicine, Otto-von-Guericke University, 39106 Magdeburg, Germany; (J.L.C.-S.); (D.M.); (V.S.); (S.M.); (D.G.)
| | - Stefan Kahlert
- Institute of Anatomy, University Hospital Magdeburg, 39120 Magdeburg, Germany;
| | - Shannon Marchal
- Department of Microgravity and Translational Regenerative Medicine, Otto-von-Guericke University, 39106 Magdeburg, Germany; (J.L.C.-S.); (D.M.); (V.S.); (S.M.); (D.G.)
| | - Ian R. D. Johnson
- Research in Space Environments Group, UniSA Clinical and Health Sciences, University of South Australia, Adelaide, SA 5000, Australia;
| | - Marco Calvaruso
- Institute of Bioimaging and Molecular Physiology, National Research Council (IBFM-CNR), 90015 Cefalù, Italy;
| | - Christian Liemersdorf
- Department of Gravitational Biology, Institute of Aerospace Medicine, German Aerospace Center, 51147 Cologne, Germany;
| | - Simon L. Wuest
- Institute of Medical Engineering, Lucerne University of Applied Sciences and Arts, 6052 Hergiswil, Switzerland;
| | - Daniela Grimm
- Department of Microgravity and Translational Regenerative Medicine, Otto-von-Guericke University, 39106 Magdeburg, Germany; (J.L.C.-S.); (D.M.); (V.S.); (S.M.); (D.G.)
- Research Group “Magdeburger Arbeitsgemeinschaft für Forschung unter Raumfahrt- und Schwerelosigkeitsbedingungen” (MARS), Otto-von-Guericke University, 39106 Magdeburg, Germany
- Department of Biomedicine, Aarhus University, 8000 Aarhus C, Denmark
| | - Marcus Krüger
- Department of Microgravity and Translational Regenerative Medicine, Otto-von-Guericke University, 39106 Magdeburg, Germany; (J.L.C.-S.); (D.M.); (V.S.); (S.M.); (D.G.)
- Research Group “Magdeburger Arbeitsgemeinschaft für Forschung unter Raumfahrt- und Schwerelosigkeitsbedingungen” (MARS), Otto-von-Guericke University, 39106 Magdeburg, Germany
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Cauli E, Polidoro MA, Marzorati S, Bernardi C, Rasponi M, Lleo A. Cancer-on-chip: a 3D model for the study of the tumor microenvironment. J Biol Eng 2023; 17:53. [PMID: 37592292 PMCID: PMC10436436 DOI: 10.1186/s13036-023-00372-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 08/03/2023] [Indexed: 08/19/2023] Open
Abstract
The approval of anticancer therapeutic strategies is still slowed down by the lack of models able to faithfully reproduce in vivo cancer physiology. On one hand, the conventional in vitro models fail to recapitulate the organ and tissue structures, the fluid flows, and the mechanical stimuli characterizing the human body compartments. On the other hand, in vivo animal models cannot reproduce the typical human tumor microenvironment, essential to study cancer behavior and progression. This study reviews the cancer-on-chips as one of the most promising tools to model and investigate the tumor microenvironment and metastasis. We also described how cancer-on-chip devices have been developed and implemented to study the most common primary cancers and their metastatic sites. Pros and cons of this technology are then discussed highlighting the future challenges to close the gap between the pre-clinical and clinical studies and accelerate the approval of new anticancer therapies in humans.
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Affiliation(s)
- Elisa Cauli
- Department of Electronics, Information and Bioengineering, Politecnico Di Milano, Milan, Italy.
- Accelera Srl, Nerviano, Milan, Italy.
| | - Michela Anna Polidoro
- Hepatobiliary Immunopathology Laboratory, IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
| | - Simona Marzorati
- Hepatobiliary Immunopathology Laboratory, IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
| | | | - Marco Rasponi
- Department of Electronics, Information and Bioengineering, Politecnico Di Milano, Milan, Italy
| | - Ana Lleo
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
- Division of Internal Medicine and Hepatology, Department of Gastroenterology, IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy
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Aubry G, Lee HJ, Lu H. Advances in Microfluidics: Technical Innovations and Applications in Diagnostics and Therapeutics. Anal Chem 2023; 95:444-467. [PMID: 36625114 DOI: 10.1021/acs.analchem.2c04562] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Guillaume Aubry
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Hyun Jee Lee
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Hang Lu
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States.,Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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Zhao X, Zarasvand KA, Pope C, Golovin K. Thermal Insulation and Superhydrophobicity Synergies for Passive Snow Repellency. ACS APPLIED MATERIALS & INTERFACES 2022; 14:21657-21667. [PMID: 35471928 DOI: 10.1021/acsami.2c02236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The adhesion mechanisms and fracture mechanics of snow on solid surfaces are complex, making the design of an all-purpose snow-repellent surface that is applicable to multiple real-life situations a considerable and unsolved challenge. In this study, we focus on the most difficult-to-remove snow accretion scenario─the formation of a highly adhesive meltwater ice layer at the snow-solid interface. This ice layer originates from snow melting on an initially above 0 °C surface, followed by refreezing in a subzero environment. The complete removal of this ice layer is especially challenging and usually requires active and energy-intensive methods. By combining the characteristics of thermal insulation and superhydrophobicity on solid surfaces, we successfully prevent snow melting and its subsequent refreezing to this highly adhesive ice layer, enabling the complete passive removal of snow from solid surfaces. Our snow-repellent platform is designed using thin superhydrophobic sheets covering solid surfaces, separated by a thermally insulative layer (air gap or aerogel). In contrast to conventional icephobic surfaces, the synergies between thermal insulation and superhydrophobicity provide a tailored route specifically toward the design of passive snow-repellent surfaces.
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Affiliation(s)
- Xiaoxiao Zhao
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, Ontario M5S 3G8, Canada
| | | | - Cory Pope
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, Ontario M5S 3G8, Canada
| | - Kevin Golovin
- Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, Ontario M5S 3G8, Canada
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