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Bonilla DA, Orozco CA, Forero DA, Odriozola A. Techniques, procedures, and applications in host genetic analysis. ADVANCES IN GENETICS 2024; 111:1-79. [PMID: 38908897 DOI: 10.1016/bs.adgen.2024.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/24/2024]
Abstract
This chapter overviews genetic techniques' fundamentals and methodological features, including different approaches, analyses, and applications that have contributed to advancing health and disease. The aim is to describe laboratory methodologies and analyses employed to understand the genetic landscape of different biological contexts, from conventional techniques to cutting-edge technologies. Besides describing detailed aspects of the polymerase chain reaction (PCR) and derived types as one of the principles for many novel techniques, we also discuss microarray analysis, next-generation sequencing, and genome editing technologies such as transcription activator-like effector nucleases (TALENs) and the clustered regularly interspaced short palindromic repeats (CRISPR) and CRISPR-associated (Cas) systems. These techniques study several phenotypes, ranging from autoimmune disorders to viral diseases. The significance of integrating diverse genetic methodologies and tools to understand host genetics comprehensively and addressing the ethical, legal, and social implications (ELSI) associated with using genetic information is highlighted. Overall, the methods, procedures, and applications in host genetic analysis provided in this chapter furnish researchers and practitioners with a roadmap for navigating the dynamic landscape of host-genome interactions.
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Affiliation(s)
- Diego A Bonilla
- Hologenomiks Research Group, Department of Genetics, Physical Anthropology and Animal Physiology, University of the Basque Country (UPV/EHU), Leioa, Spain; Research Division, Dynamical Business & Science Society-DBSS International SAS, Bogotá, Colombia.
| | - Carlos A Orozco
- Grupo de Investigación en Biología del Cáncer, Instituto Nacional de Cancerología de Colombia, Bogotá, Colombia
| | - Diego A Forero
- School of Health and Sport Sciences, Fundación Universitaria del Área Andina, Bogotá, Colombia
| | - Adrián Odriozola
- Hologenomiks Research Group, Department of Genetics, Physical Anthropology and Animal Physiology, University of the Basque Country (UPV/EHU), Leioa, Spain
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Rubagumya SL, Nzalawahe J, Misinzo G, Mazigo HD, Briet M, Misko VR, De Malsche W, Legein F, Justine NC, Basinda N, Mafie E. Evaluation of Lab-on-a-Disc Technique Performance for Soil-Transmitted Helminth Diagnosis in Animals in Tanzania. Vet Sci 2024; 11:174. [PMID: 38668441 PMCID: PMC11054913 DOI: 10.3390/vetsci11040174] [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: 02/21/2024] [Revised: 03/30/2024] [Accepted: 04/11/2024] [Indexed: 04/29/2024] Open
Abstract
Soil-transmitted helminth (STH) infections are caused by roundworms, hookworms, whipworms, and thread worms. Accurate diagnosis is essential for effective treatment, prevention, and control of these infections. This study evaluates a new diagnostic method called Single-image Parasite Quantification (SIMPAQ), which uses a lab-on-a-disc (LoD) technique to isolate STH eggs into a single imaging zone for digital analysis. The study evaluates the purification performance of the SIMPAQ technique for detecting STH eggs in animal samples. This was a cross-sectional study conducted among 237 pigs and 281 dogs in the Morogoro region in Tanzania. Faecal samples were collected and processed with the LoD technique, as well as flotation and McMaster (McM) methods for comparison purposes. The overall prevalence of STH infections was high as per the LoD technique (74%), followed by McM (65.44%) and flotation (65.04%). Moreover, the overall performance of the LoD technique, using McM as the gold standard, was 93.51% (sensitivity), 60.89% (specificity), 81.91% (PPV), and 83.21% (NPV). The LoD technique exhibited high prevalence, sensitivity, and NPV, which demonstrates its value for STH egg detection and its crucial role in the era of accurate STH diagnosis, promoting proper management of the infection.
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Affiliation(s)
- Sarah L. Rubagumya
- Department of Microbiology, Immunology and Parasitology, College of Health and Allied Sciences, St. Joseph University in Tanzania, Dar es Salaam P.O. Box 11007, Tanzania
| | - Jahashi Nzalawahe
- Department of Veterinary Microbiology, Parasitology and Biotechnology, College of Veterinary Medicine and Biomedical Sciences, Sokoine University of Agriculture, Morogoro P.O. Box 3019, Tanzania; (J.N.); (G.M.); (E.M.)
| | - Gerald Misinzo
- Department of Veterinary Microbiology, Parasitology and Biotechnology, College of Veterinary Medicine and Biomedical Sciences, Sokoine University of Agriculture, Morogoro P.O. Box 3019, Tanzania; (J.N.); (G.M.); (E.M.)
- SACIDS Foundation for One Health, Sokoine University of Agriculture, Morogoro P.O. Box 3297, Tanzania
| | - Humphrey D. Mazigo
- Department of Medical Parasitology, School of Medicine, Catholic University of Health and Allied Sciences, Mwanza P.O. Box 1464, Tanzania; (H.D.M.); (N.C.J.); (N.B.)
| | - Matthieu Briet
- µFlow Group, Department of Chemical Engineering, Vrije Universiteit Brussel, 1050 Brussels, Belgium; (M.B.); (V.R.M.); (F.L.)
| | - Vyacheslav R. Misko
- µFlow Group, Department of Chemical Engineering, Vrije Universiteit Brussel, 1050 Brussels, Belgium; (M.B.); (V.R.M.); (F.L.)
| | - Wim De Malsche
- µFlow Group, Department of Chemical Engineering, Vrije Universiteit Brussel, 1050 Brussels, Belgium; (M.B.); (V.R.M.); (F.L.)
| | - Filip Legein
- µFlow Group, Department of Chemical Engineering, Vrije Universiteit Brussel, 1050 Brussels, Belgium; (M.B.); (V.R.M.); (F.L.)
| | - Nyanda C. Justine
- Department of Medical Parasitology, School of Medicine, Catholic University of Health and Allied Sciences, Mwanza P.O. Box 1464, Tanzania; (H.D.M.); (N.C.J.); (N.B.)
| | - Namanya Basinda
- Department of Medical Parasitology, School of Medicine, Catholic University of Health and Allied Sciences, Mwanza P.O. Box 1464, Tanzania; (H.D.M.); (N.C.J.); (N.B.)
| | - Eliakunda Mafie
- Department of Veterinary Microbiology, Parasitology and Biotechnology, College of Veterinary Medicine and Biomedical Sciences, Sokoine University of Agriculture, Morogoro P.O. Box 3019, Tanzania; (J.N.); (G.M.); (E.M.)
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Dong Y, Chen B, Cai G, Xu F, Li L, Cheng X, Shi X, Peng B, Mi S. Integrated nucleic acid purification technology based on amino-modified centrifugal microfluidic chip. Biotechnol J 2024; 19:e2300113. [PMID: 38050772 DOI: 10.1002/biot.202300113] [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: 03/14/2023] [Revised: 11/27/2023] [Accepted: 12/01/2023] [Indexed: 12/06/2023]
Abstract
Nucleic acid detection is an important tool for clinical diagnosis. The purification of the sample is the most time-consuming step in the nucleic acid testing process and will affect the results of the assay. Here, we developed a surface modification-based nucleic acid purification method and designed an accompanying set of centrifugation equipment and chips to integrate the steps of nucleic acid purification on a single platform. The results of experiments with HeLa cells and HPV type 16 as samples showed that the mentioned method had good nucleic acid purification capability and the accompanying equipment greatly simplified the operation of the experimenters in the whole process. Overall, our equipment can improve the efficiency of nucleic acid purification and is suitable for application in larger-scale clinical assays.
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Affiliation(s)
- Yongkang Dong
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Bailiang Chen
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Gangpei Cai
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Fei Xu
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Linzhi Li
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Xiaoqi Cheng
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Xiaolu Shi
- Microbiology Laboratory, Shenzhen Center for Disease Control and Prevention, Shenzhen, Guangdong, China
| | - Bo Peng
- Microbiology Laboratory, Shenzhen Center for Disease Control and Prevention, Shenzhen, Guangdong, China
| | - Shengli Mi
- Bio-manufacturing Engineering Laboratory, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
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Misko VR, Makasali RJ, Briet M, Legein F, Levecke B, De Malsche W. Enhancing the Yield of a Lab-on-a-Disk-Based Single-Image Parasite Quantification Device. MICROMACHINES 2023; 14:2087. [PMID: 38004944 PMCID: PMC10672913 DOI: 10.3390/mi14112087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/03/2023] [Accepted: 11/09/2023] [Indexed: 11/26/2023]
Abstract
The recently proposed single-image parasite quantification (SIMPAQ) platform based on a Lab-on-a-Disc (LOD) device was previously successfully tested in field conditions, demonstrating its efficiency in soil-transmitted helminth (STH) egg detection and analysis on the level delivered by the current state-of-the-art methods. Furthermore, the SIMPAQ provides relatively quick diagnostics and requires small amounts of sample and materials. On the other hand, in a recent related study, it was revealed that the performance of the SIMPAQ method can be limited due to the action of the tangential Euler and Coriolis forces, and the interaction of the moving eggs with the walls of the LOD chamber. Here, we propose a new improved design that allows us to overcome these limitations and enhance the yield of the SIMPAQ LOD device, as demonstrated in experiments with a synthetic particle model system and real parasite eggs. Despite the simplicity, the proposed design modification is demonstrated to allow a substantial improvement in the yield of the SIMPAQ device, i.e., above 90% of parasite eggs and 98% of synthetic model particles were transported to the field of view. The new design proposed here will be further examined in the new generation of SIMPAQ devices within ongoing research on STH egg detection in field conditions.
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Affiliation(s)
- Vyacheslav R. Misko
- µFlow Group, Department of Chemical Engineering, Vrije Universiteit Brussel, 1050 Brussels, Belgium; (V.R.M.); (R.J.M.); (M.B.); (F.L.)
| | - Ramadhani Juma Makasali
- µFlow Group, Department of Chemical Engineering, Vrije Universiteit Brussel, 1050 Brussels, Belgium; (V.R.M.); (R.J.M.); (M.B.); (F.L.)
| | - Matthieu Briet
- µFlow Group, Department of Chemical Engineering, Vrije Universiteit Brussel, 1050 Brussels, Belgium; (V.R.M.); (R.J.M.); (M.B.); (F.L.)
| | - Filip Legein
- µFlow Group, Department of Chemical Engineering, Vrije Universiteit Brussel, 1050 Brussels, Belgium; (V.R.M.); (R.J.M.); (M.B.); (F.L.)
| | - Bruno Levecke
- Department of Translational Physiology, Infectiology and Public Health, Ghent University, 9820 Merelbeke, Belgium;
| | - Wim De Malsche
- µFlow Group, Department of Chemical Engineering, Vrije Universiteit Brussel, 1050 Brussels, Belgium; (V.R.M.); (R.J.M.); (M.B.); (F.L.)
- Department of Bioengineering Sciences, Vrije Universiteit Brussel, 1050 Brussels, Belgium
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Serioli L, Ishimoto A, Yamaguchi A, Zór K, Boisen A, Hwu ET. APELLA: Open-Source, miniaturized All-in-One powered Lab-on-a-Disc platform. HARDWAREX 2023; 15:e00449. [PMID: 37457307 PMCID: PMC10339059 DOI: 10.1016/j.ohx.2023.e00449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/23/2023] [Accepted: 06/26/2023] [Indexed: 07/18/2023]
Abstract
We present an unconventional approach to a common Lab-on-a-Disc (LoD) that combines a quadcopter propulsion system, a miniaturized 2.4 GHz Wi-Fi spy camera, 9.74 Watt Qi wireless power, and an Arduino into an open-source, miniaturized All-in-one powered lab-on-disc platform (APELLA). The quadcopter propulsion generates thrust to rotate (from 0.1 to 24.5 Hz) or shake the LoD device, while the spy camera enables a real-time (30 frames per second) and high definition (1280 × 720 pixels) visualization of microfluidic channels without requiring a bulky and heavy stroboscopic imaging setup. A mobile device can communicate with an Arduino microcontroller inside the APELLA through a Bluetooth interface for closed loop and sequential frequency control. In a proof-of-concept study, the APELLA achieved comparable mixing efficiency to a traditional spin stand and can capture rapid microfluidic events at low rotational frequencies (<5Hz). The APELLA is low-cost (c.a. 100 Euro), compact (15.6 × 15.6 × 10 cm3), lightweight (0.59 kg), portable (powered by a 5 V USB power bank), and energy efficient (uses < 6% power of the conventional system), making it ideal for field deployment, education, resource-limited labs.
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Affiliation(s)
- Laura Serioli
- The Danish National Research Foundation and Villum Foundation’s Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, Lyngby, Denmark
- BioInnovation Institute Foundation, Copenhagen N 2800, Denmark
| | - Atsushi Ishimoto
- The Danish National Research Foundation and Villum Foundation’s Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, Lyngby, Denmark
- Laboratory of Advanced Science and Technology for Industry (LASTI), University of Hyogo, Japan
| | - Akinobu Yamaguchi
- Laboratory of Advanced Science and Technology for Industry (LASTI), University of Hyogo, Japan
| | - Kinga Zór
- The Danish National Research Foundation and Villum Foundation’s Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, Lyngby, Denmark
- BioInnovation Institute Foundation, Copenhagen N 2800, Denmark
| | - Anja Boisen
- The Danish National Research Foundation and Villum Foundation’s Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, Lyngby, Denmark
- BioInnovation Institute Foundation, Copenhagen N 2800, Denmark
| | - En-Te Hwu
- The Danish National Research Foundation and Villum Foundation’s Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, Lyngby, Denmark
- BioInnovation Institute Foundation, Copenhagen N 2800, Denmark
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Chang CH, Wang CL, Li BR. Rapid detection of live bacteria in water using nylon filter membrane-integrated centrifugal microfluidics. Biosens Bioelectron 2023; 236:115403. [PMID: 37271096 DOI: 10.1016/j.bios.2023.115403] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 05/15/2023] [Indexed: 06/06/2023]
Abstract
Water is one of the most indispensable elements for human beings. People can live without food for a couple of weeks but cannot live without water for a couple of days. Unfortunately, drinking water is not always safe around the world; in many areas, the water for drinking could be contaminated with various microbes. However, the total viable microbe count in water still relies on culture-based methods in laboratories. Therefore, in this work, we report a novel, simple, and highly efficient strategy to detect live bacteria in water via a nylon membrane-integrated centrifugal microfluidic device. A handheld fan and a rechargeable hand warmer were utilized as the centrifugal rotor and the heat resource for reactions, respectively. The bacteria in water can be rapidly concentrated >500-fold by our centrifugation system. After incubation with water-soluble tetrazolium-8 (WST-8), the color change of the nylon membranes can be visually interpreted directly by the naked eye or recorded with a smartphone camera. The whole process can be finished in 3 h, and the detection limit can reach 102 CFU/mL. The detection range ranges from 102 CFU/mL to 105 CFU/mL. The cell counting results of our platform are highly positively correlated with the results of cell counting by the conventional lysogeny broth (LB) agar plate approach or the commercial 3 M Petrifilm™ cell counting plate. Our platform provides a convenient and sensitive strategy for rapid monitoring. We highly anticipate that this platform can improve water quality monitoring in resource-poor countries in the near future.
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Affiliation(s)
- Chun-Hao Chang
- Institute of Biomedical Engineering, National Yang Ming Chiao Tung University, Hsinchu, Taiwan; Department of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu, Taiwan
| | - Chih-Ling Wang
- Institute of Biomedical Engineering, National Yang Ming Chiao Tung University, Hsinchu, Taiwan
| | - Bor-Ran Li
- Institute of Biomedical Engineering, National Yang Ming Chiao Tung University, Hsinchu, Taiwan; Department of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu, Taiwan; Center for Emergent Functional Matter Science, National Yang Ming Chiao Tung University, Hsinchu, Taiwan.
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7
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Wilkirson EC, Singampalli KL, Li J, Dixit DD, Jiang X, Gonzalez DH, Lillehoj PB. Affinity-based electrochemical sensors for biomolecular detection in whole blood. Anal Bioanal Chem 2023:10.1007/s00216-023-04627-5. [PMID: 36917265 PMCID: PMC10011785 DOI: 10.1007/s00216-023-04627-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 02/17/2023] [Accepted: 02/21/2023] [Indexed: 03/15/2023]
Abstract
The detection and/or quantification of biomarkers in blood is important for the early detection, diagnosis, and treatment of a variety of diseases and medical conditions. Among the different types of sensors for detecting molecular biomarkers, such as proteins, nucleic acids, and small-molecule drugs, affinity-based electrochemical sensors offer the advantages of high analytical sensitivity and specificity, fast detection times, simple operation, and portability. However, biomolecular detection in whole blood is challenging due to its highly complex matrix, necessitating sample purification (i.e., centrifugation), which involves the use of bulky, expensive equipment and tedious sample-handling procedures. To address these challenges, various strategies have been employed, such as purifying the blood sample directly on the sensor, employing micro-/nanoparticles to enhance the detection signal, and coating the electrode surface with blocking agents to reduce nonspecific binding, to improve the analytical performance of affinity-based electrochemical sensors without requiring sample pre-processing steps or laboratory equipment. In this article, we present an overview of affinity-based electrochemical sensor technologies that employ these strategies for biomolecular detection in whole blood.
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Affiliation(s)
- Elizabeth C Wilkirson
- Department of Mechanical Engineering, Rice University, 6100 Main St., Houston, TX, 77005, USA
| | - Kavya L Singampalli
- Department of Bioengineering, Rice University, 6500 Main St., Houston, TX, 77030, USA
- Medical Scientist Training Program, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX, 77030, USA
| | - Jiran Li
- Department of Mechanical Engineering, Rice University, 6100 Main St., Houston, TX, 77005, USA
| | - Desh Deepak Dixit
- Department of Mechanical Engineering, Rice University, 6100 Main St., Houston, TX, 77005, USA
| | - Xue Jiang
- Department of Mechanical Engineering, Rice University, 6100 Main St., Houston, TX, 77005, USA
| | - Diego H Gonzalez
- Department of Bioengineering, Rice University, 6500 Main St., Houston, TX, 77030, USA
| | - Peter B Lillehoj
- Department of Mechanical Engineering, Rice University, 6100 Main St., Houston, TX, 77005, USA.
- Department of Bioengineering, Rice University, 6500 Main St., Houston, TX, 77030, USA.
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Hwang S, Choi J. Rapid antimicrobial susceptibility testing for low bacterial concentrations integrating a centrifuge based bacterial cell concentrator. LAB ON A CHIP 2023; 23:229-238. [PMID: 36484274 DOI: 10.1039/d2lc00974a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Antibiotic resistance threatens human health worldwide. Patients infected with antibiotic-resistant bacteria require appropriate antibiotic prescriptions based on a rapid antibiotic susceptibility test (AST). Various rapid AST methods have been developed to replace the conventional AST method, which requires a long testing time. However, in most cases, these methods require a high density of bacterial samples, which leads to an additional incubation or concentration process. In this study, we introduce a rapid AST platform that allows the use of low-density bacterial samples by concentrating bacterial cells and performing AST on a single microfluidic chip. In addition, the outlet-free loading process enables the platform to load the sample and concentrate bacteria into a small field of view for single-cell detection. Using this method, rapid AST determined antibiotic resistance in three hours from a standard strain of 103 colony-forming unit (CFU) per ml bacterial concentration. This technique can be used for the cell-based drug testing of various low-concentration bacterial samples.
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Affiliation(s)
- Sunjae Hwang
- Department of Mechanical Engineering, Kookmin University, Seoul 02707, Republic of Korea
| | - Jungil Choi
- Department of Mechanical Engineering, Ajou University, Suwon 16499, Republic of Korea.
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Liang C, Yang Z, Jiang H. A film-lever actuated switch technology for multifunctional, on-demand, and robust manipulation of liquids. Nat Commun 2022; 13:4902. [PMID: 35987906 PMCID: PMC9391643 DOI: 10.1038/s41467-022-32676-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 08/11/2022] [Indexed: 11/15/2022] Open
Abstract
A lab-on-a-chip system with Point-of-Care testing capability offers rapid and accurate diagnostic potential and is useful in resource-limited settings where biomedical equipment and skilled professionals are not readily available. However, a Point-of-Care testing system that simultaneously possesses all required features of multifunctional dispensing, on-demand release, robust operations, and capability for long-term reagent storage is still a major challenge. Here, we describe a film-lever actuated switch technology that can manipulate liquids in any direction, provide accurate and proportional release response to the applied pneumatic pressure, as well as sustain robustness during abrupt movements and vibrations. Based on the technology, we also describe development of a polymerase chain reaction system that integrates reagent introduction, mixing and reaction functions all in one process, which accomplishes “sample-in-answer-out” performance for all clinical nasal samples from 18 patients with Influenza and 18 individual controls, in good concordance of fluorescence intensity with standard polymerase chain reaction (Pearson coefficients > 0.9). The proposed platform promises robust automation of biomedical analysis, and thus can accelerate the commercialization of a range of Point-of-Care testing devices. Point-of-care testing offers rapid and accurate diagnostic potential being quite useful in resource-limited settings. Here, authors demonstrate a film-lever actuated switch technology for microfluidic manipulation enabling multifunctional dispensing, on-demand release, robust operation, and long-term storage.
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10
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Electrified lab on disc systems: A comprehensive review on electrokinetic applications. Biosens Bioelectron 2022; 214:114381. [DOI: 10.1016/j.bios.2022.114381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 04/24/2022] [Accepted: 05/13/2022] [Indexed: 11/21/2022]
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Sun H, Hu N, Wang J. Application of Microfluidic Technology in Antibody Screening. Biotechnol J 2022; 17:e2100623. [PMID: 35481726 DOI: 10.1002/biot.202100623] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 04/13/2022] [Accepted: 04/23/2022] [Indexed: 11/07/2022]
Abstract
Specific antibodies are widely used in the biomedical field. Current screening methods for specific antibodies mainly involve hybridoma technology and antibody engineering techniques. However, these technologies suffer from tedious screening processes, long preparation periods, high costs, low efficiency, and a degree of automation, which have become a bottleneck for the screening of specific antibodies. To overcome these difficulties, microfluidics has been developed as a promising technology for high-throughput screening and high purity of antibody. In this review, we provide an overview of the recent advances in microfluidic applications for specific antibody screening. In particular, hybridoma technology and four antibody engineering techniques (including phage display, single B cell antibody screening, antibody expression, and cell-free protein synthesis) based on microfluidics have been introduced, challenges, and the future outlook of these technologies are also discussed. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Heng Sun
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400044, China
| | - Ning Hu
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400044, China
| | - Jianhua Wang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400044, China
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Gowda HN, Kido H, Wu X, Shoval O, Lee A, Lorenzana A, Madou M, Hoffmann M, Jiang SC. Development of a proof-of-concept microfluidic portable pathogen analysis system for water quality monitoring. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 813:152556. [PMID: 34952082 PMCID: PMC8837627 DOI: 10.1016/j.scitotenv.2021.152556] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 12/15/2021] [Accepted: 12/16/2021] [Indexed: 05/03/2023]
Abstract
Waterborne diseases cause millions of deaths worldwide, especially in developing communities. The monitoring and rapid detection of microbial pathogens in water is critical for public health protection. This study reports the development of a proof-of-concept portable pathogen analysis system (PPAS) that can detect bacteria in water with the potential application in a point-of-sample collection setting. A centrifugal microfluidic platform is adopted to integrate bacterial cell lysis in water samples, nucleic acid extraction, and reagent mixing with a droplet digital loop mediated isothermal amplification assay for bacteria quantification onto a single centrifugal disc (CD). Coupled with a portable "CD Driver" capable of automating the assay steps, the CD functions as a single step bacterial detection "lab" without the need to transfer samples from vial-to-vial as in a traditional laboratory. The prototype system can detect Enterococcus faecalis, a common fecal indicator bacterium, in water samples with a single touch of a start button within 1 h and having total hands-on-time being less than 5 min. An add-on bacterial concentration cup prefilled with absorbent polymer beads was designed to integrate with the pathogen CD to improve the downstream quantification sensitivity. All reagents and amplified products are contained within the single-use disc, reducing the opportunity of cross contamination of other samples by the amplification products. This proof-of-concept PPAS lays the foundation for field testing devices in areas needing more accessible water quality monitoring tools and are at higher risk for being exposed to contaminated waters.
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Affiliation(s)
- Hamsa N Gowda
- Samueli School of Engineering, University of California, Irvine, Irvine, CA 92617, USA
| | - Horacio Kido
- Samueli School of Engineering, University of California, Irvine, Irvine, CA 92617, USA
| | - Xunyi Wu
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, USA
| | - Oren Shoval
- Samueli School of Engineering, University of California, Irvine, Irvine, CA 92617, USA
| | - Adrienne Lee
- Samueli School of Engineering, University of California, Irvine, Irvine, CA 92617, USA
| | - Albert Lorenzana
- Samueli School of Engineering, University of California, Irvine, Irvine, CA 92617, USA
| | - Marc Madou
- Samueli School of Engineering, University of California, Irvine, Irvine, CA 92617, USA
| | - Michael Hoffmann
- Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125, USA
| | - Sunny C Jiang
- Samueli School of Engineering, University of California, Irvine, Irvine, CA 92617, USA.
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13
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El-Sherif DM, Abouzid M, Gaballah MS, Ahmed AA, Adeel M, Sheta SM. New approach in SARS-CoV-2 surveillance using biosensor technology: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:1677-1695. [PMID: 34689274 PMCID: PMC8541810 DOI: 10.1007/s11356-021-17096-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 10/13/2021] [Indexed: 05/14/2023]
Abstract
Biosensors are analytical tools that transform the bio-signal into an observable response. Biosensors are effective for early detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection because they target viral antigens to assess clinical development and provide information on the severity and critical trends of infection. The biosensors are capable of being on-site, fast, and extremely sensitive to the target viral antigen, opening the door for early detection of SARS-CoV-2. They can screen individuals in hospitals, airports, and other crowded locations. Microfluidics and nanotechnology are promising cornerstones for the development of biosensor-based techniques. Recently, due to high selectivity, simplicity, low cost, and reliability, the production of biosensor instruments have attracted considerable interest. This review article precisely provides the extensive scientific advancement and intensive look of basic principles and implementation of biosensors in SARS-CoV-2 surveillance, especially for human health. In this review, the importance of biosensors including Optical, Electrochemical, Piezoelectric, Microfluidic, Paper-based biosensors, Immunosensors, and Nano-Biosensors in the detection of SARS-CoV-2 has been underscored. Smartphone biosensors and calorimetric strips that target antibodies or antigens should be developed immediately to combat the rapidly spreading SARS-CoV-2. Wearable biosensors can constantly monitor patients, which is a highly desired feature of biosensors. Finally, we summarized the literature, outlined new approaches and future directions in diagnosing SARS-CoV-2 by biosensor-based techniques.
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Affiliation(s)
- Dina M El-Sherif
- National Institute of Oceanography and Fisheries, NIOF, Cairo, Egypt.
| | - Mohamed Abouzid
- Department of Physical Pharmacy and Pharmacokinetics, Faculty of Pharmacy, Poznan University of Medical Sciences, 60-781, Poznan, Poland.
| | - Mohamed S Gaballah
- National Institute of Oceanography and Fisheries, NIOF, Cairo, Egypt
- College of Engineering, Key Laboratory for Clean Renewable Energy Utilization Technology, Ministry of Agriculture), China Agricultural University, Beijing, 100083, People's Republic of China
| | - Alhassan Ali Ahmed
- Department of Bioinformatics and Computational Biology, Poznan University of Medical Sciences, Poznan, Poland
| | - Muhammad Adeel
- BNU-HKUST Laboratory of Green Innovation, Advanced Institute of Natural Sciences, Beijing Normal University Zhuhai Subcampus, 18 Jinfeng Road, Tangjiawan, Zhuhai, Guangdong, China
| | - Sheta M Sheta
- Inorganic Chemistry Department, National Research Centre, 33 El-Behouth St., Dokki, Giza, 12622, Egypt
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14
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Choi G, Guan W. Sample-to-Answer Microfluidic Nucleic Acid Testing (NAT) on Lab-on-a-Disc for Malaria Detection at Point of Need. Methods Mol Biol 2022; 2393:297-313. [PMID: 34837186 PMCID: PMC9191616 DOI: 10.1007/978-1-0716-1803-5_16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
One of the grand challenges for field-deployable NATs is related to the front end of the assays-nucleic acid extraction from raw samples. The ideal nucleic acid sample preparation should be simple, scalable, and easy-to-operate. In this chapter, we present a lab-on-a-disc NAT device for sample-to-answer malaria diagnosis. The parasite DNA sample preparation and subsequent real-time LAMP detection are seamlessly integrated on a disposable single microfluidic compact disc, driven by energy-efficient, non-centrifuge-based magnetic field interactions. Each disc contains four parallel testing units, which could be configured either as four identical tests or as four species-specific tests. When configured as species-specific tests, it could identify two of the most life-threatening malaria species (P. falciparum and P. vivax). The reagent disc with a 4-plex analyzer (discussed in Chapter 1 ) is capable of processing four samples simultaneously with 40 min turnaround time. It achieves a detection limit of ~0.5 parasites/μl for whole blood, sufficient for detecting asymptomatic parasite carriers. The assay is performed with an automated device described in Chapter 14 . The combination of sensitivity, specificity, cost, and scalable sample preparation suggests the real-time fluorescence LAMP device could be particularly useful for malaria screening in field settings.
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Affiliation(s)
- Gihoon Choi
- Department of Electrical Engineering, Pennsylvania State University, University Park, PA, USA
| | - Weihua Guan
- Department of Electrical Engineering, Pennsylvania State University, University Park, PA, USA.
- Department of Biomedical Engineering, Pennsylvania State University, University Park, PA, USA.
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15
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De Grandi D, Meghdadi A, LuTheryn G, Carugo D. Facile production of quercetin nanoparticles using 3D printed centrifugal flow reactors. RSC Adv 2022; 12:20696-20713. [PMID: 35919149 PMCID: PMC9295137 DOI: 10.1039/d2ra02745c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 07/11/2022] [Indexed: 11/21/2022] Open
Abstract
A 3D printed reactor-in-a-centrifuge (RIAC) was developed to produce drug nanocrystals. Quercetin nanocrystals were manufactured at varying operational and formulation conditions, and had a small size (190–302 nm) and low size dispersity (PDI < 0.1).
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Affiliation(s)
- Davide De Grandi
- Department of Drug Sciences, Faculty of Pharmacy, University of Pavia, Pavia 27100, Italy
- Department of Pharmaceutics, School of Pharmacy, University College London, London WC1N 1AX, UK
| | - Alireza Meghdadi
- Department of Pharmaceutics, School of Pharmacy, University College London, London WC1N 1AX, UK
- Department of Mechanical Engineering, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton SO17 1BJ, UK
| | - Gareth LuTheryn
- Department of Pharmaceutics, School of Pharmacy, University College London, London WC1N 1AX, UK
| | - Dario Carugo
- Department of Pharmaceutics, School of Pharmacy, University College London, London WC1N 1AX, UK
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16
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Ducrée J. Systematic review of centrifugal valving based on digital twin modeling towards highly integrated lab-on-a-disc systems. MICROSYSTEMS & NANOENGINEERING 2021; 7:104. [PMID: 34987859 PMCID: PMC8677742 DOI: 10.1038/s41378-021-00317-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 09/16/2021] [Accepted: 09/27/2021] [Indexed: 05/07/2023]
Abstract
Current, application-driven trends towards larger-scale integration (LSI) of microfluidic systems for comprehensive assay automation and multiplexing pose significant technological and economical challenges to developers. By virtue of their intrinsic capability for powerful sample preparation, centrifugal systems have attracted significant interest in academia and business since the early 1990s. This review models common, rotationally controlled valving schemes at the heart of such "Lab-on-a-Disc" (LoaD) platforms to predict critical spin rates and reliability of flow control which mainly depend on geometries, location and liquid volumes to be processed, and their experimental tolerances. In absence of larger-scale manufacturing facilities during product development, the method presented here facilitates efficient simulation tools for virtual prototyping and characterization and algorithmic design optimization according to key performance metrics. This virtual in silico approach thus significantly accelerates, de-risks and lowers costs along the critical advancement from idea, layout, fluidic testing, bioanalytical validation, and scale-up to commercial mass manufacture.
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Affiliation(s)
- Jens Ducrée
- School of Physical Sciences, Dublin City University, Dublin, Ireland
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17
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Karmacharya M, Kumar S, Lee C, Cho YK. Lab-on-a-disc for ultrafast plasmonic assay of cysteamine. Biosens Bioelectron 2021; 194:113584. [PMID: 34474276 DOI: 10.1016/j.bios.2021.113584] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/24/2021] [Accepted: 08/23/2021] [Indexed: 12/26/2022]
Abstract
Cysteamine (CA) is a cystine depleting agent used in the treatment of cystinosis and many other diseases. However, high dose of CA can be toxic and thus point-of-care-test devices measuring blood CA level can be highly beneficial. Here, we report a highly sensitive, straightforward, and quantitative assay for the colorimetric and spectroscopic determination of CA concentration using plasmonic nanoparticles. The principle is based on the chemical etching-induced exchange of the surface ligands of plasmonic gold nanoparticles (AuNPs) upon the addition of CA. Moreover, destabilized particles can aggregate to generate the plasmonic couplings that trigger the redshift in the ultraviolet-visible (UV-vis) spectrum (the absorption band shifted from 526 to 732 nm) and the solution color change (wine-red to blackish-blue). This plasmonic AuNPs sensor displays a clear red-to-blue colorimetric transition in the presence of CA among various biothiols with high specificity and sensitivity within a short time (<15 s). Furthermore, a lab-on-a-disc platform was applied to the analysis of blood samples donated by healthy volunteers spiked with known amounts of the CA standard solution. This fully automated lab-on-a-disc platform approach for naked eye detecting the CA concentration in human blood samples (20 μL) is highly simple and time-efficient (<6 min), and it would be potentially useful for the careful selection of CA doses in the hospital industry.
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Affiliation(s)
- Mamata Karmacharya
- Department of Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea; Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan, 44919, Republic of Korea
| | - Sumit Kumar
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea; Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan, 44919, Republic of Korea
| | - Chaeeun Lee
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea; Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan, 44919, Republic of Korea
| | - Yoon-Kyoung Cho
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea; Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan, 44919, Republic of Korea.
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18
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Wang S, Zhang X, Ma C, Yan S, Inglis D, Feng S. A Review of Capillary Pressure Control Valves in Microfluidics. BIOSENSORS 2021; 11:405. [PMID: 34677361 PMCID: PMC8533935 DOI: 10.3390/bios11100405] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 10/12/2021] [Accepted: 10/14/2021] [Indexed: 12/18/2022]
Abstract
Microfluidics offer microenvironments for reagent delivery, handling, mixing, reaction, and detection, but often demand the affiliated equipment for liquid control for these functions. As a helpful tool, the capillary pressure control valve (CPCV) has become popular to avoid using affiliated equipment. Liquid can be handled in a controlled manner by using the bubble pressure effects. In this paper, we analyze and categorize the CPCVs via three determining parameters: surface tension, contact angle, and microchannel shape. Finally, a few application scenarios and impacts of CPCV are listed, which includes how CPVC simplify automation of microfluidic networks, work with other driving modes; make extensive use of microfluidics by open channel, and sampling and delivery with controlled manners. The authors hope this review will help the development and use of the CPCV in microfluidic fields in both research and industry.
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Affiliation(s)
- Shaoxi Wang
- School of Microelectronics, Northwestern Polytechnical University, Xi’an 710072, China; (S.W.); (X.Z.)
| | - Xiafeng Zhang
- School of Microelectronics, Northwestern Polytechnical University, Xi’an 710072, China; (S.W.); (X.Z.)
| | - Cong Ma
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;
- School of Information Science and Technology, ShanghaiTech University, Shanghai 201210, China
| | - Sheng Yan
- Institute for Advanced Study, Shenzhen University, Shenzhen 518060, China;
| | - David Inglis
- School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, NSW 2109, Australia;
| | - Shilun Feng
- State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;
- School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, NSW 2109, Australia;
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
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19
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Sunkara V, Kumar S, Sabaté del Río J, Kim I, Cho YK. Lab-on-a-Disc for Point-of-Care Infection Diagnostics. Acc Chem Res 2021; 54:3643-3655. [PMID: 34516092 DOI: 10.1021/acs.accounts.1c00367] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Reliable, inexpensive, and rapid diagnostic tools are essential to control and prevent the spread of infectious diseases. Many commercial kits for coronavirus disease 2019 (COVID-19) diagnostics have played a crucial role in the fight against the COVID-19 pandemic. Most current standard in vitro diagnostic (IVD) protocols for infectious diseases are sensitive but time-consuming and require sophisticated laboratory equipment and specially trained personnel. Recent advances in biosensor technology suggest the potential to deliver point-of-care (POC) diagnostics that are affordable and provide accurate results in a short time. The ideal "sample-in-answer-out" type fully integrated POC infection diagnostic platforms are expected to be autonomous or easy-to-operate, equipment-free or infrastructure-independent, and high-throughput or easy to upscale. In this Account, we detail the recent progress made by our group and others in the development of centrifugal microfluidic devices or lab-on-a-disc (LOAD) systems. Unlike conventional pump-based fluid actuation, the centrifugal force generated by spinning the disc induces liquid pumping and no external fluidic interconnects are required. This allows a total fluidic network required for multiple steps of biological assays to be integrated on a disc, enabling fully automated POC diagnostics. Various applications have been demonstrated, including liquid biopsy for personalized cancer management, food applications, and environmental monitoring; here, we focus on IVD for infectious disease. First, we introduce various on-disc unit operation technologies, including reagent storage, sedimentation, filtration, valving, decanting, aliquoting, mixing, separation, serial dilution, washing, and calibration. Such centrifugal microfluidic technologies have already proved promising for micro-total-analysis systems for automated IVD ranging from molecular detection of pathogens to multiplexed enzyme-linked immunosorbent assays (ELISAs) that use raw samples such as whole blood or saliva. Some recent examples of LOAD systems for molecular diagnostics in which some or all steps of the assays are integrated on a disc, including pathogen enrichment, nucleic acid extraction, amplification, and detection, are discussed in detail. We then introduce fully automated ELISA systems with enhanced sensitivity. Furthermore, we demonstrate a toy-inspired fidget spinner that enables electricity-free and rapid analysis of pathogens from undiluted urine samples of patients with urinary tract infection symptoms and a phenotypic antimicrobial susceptibility test for an extreme POC diagnostics application. Considering the urgent need for cost-effective and reliable POC infection diagnostic tools, especially in the current pandemic crisis, the current limitations and future directions of fast and broad adaptation in real-world settings are also discussed. With proper attention to key challenges and leverage with recent advances in bio-sensing technologies, molecular biology, nanomaterials, analytical chemistry, miniaturization, system integration, and data management, LOAD systems hold the potential to deliver POC infection diagnostic tools with unprecedented performance regarding time, accuracy, and cost. We hope the new insight and promise of LOAD systems for POC infection diagnostics presented in this Account can spark new ideas and inspire further research and development to create better healthcare systems for current and future pandemics.
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Affiliation(s)
- Vijaya Sunkara
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
| | - Sumit Kumar
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
| | - Jonathan Sabaté del Río
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
| | - Insu Kim
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
| | - Yoon-Kyoung Cho
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
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20
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Chattopadhyay S, Ram R, Sarkar A, Dutta G, Chakraborty S. Reagent-free hemoglobin estimation on a spinning disc. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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21
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Migration Behavior of Low-Density Particles in Lab-on-a-Disc Devices: Effect of Walls. MICROMACHINES 2021; 12:mi12091032. [PMID: 34577676 PMCID: PMC8471521 DOI: 10.3390/mi12091032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/25/2021] [Accepted: 08/25/2021] [Indexed: 11/17/2022]
Abstract
The effect of the lateral walls of a Lab-On-a-Disc device on the dynamics of a model system of particles with a density lower than that of the solvent (modelling parasites eggs) is analyzed theoretically and experimentally. In the absence of lateral walls, a particle always moves in the direction of the centrifugal force, while its trajectory is deflected in the tangential direction by the inertial Coriolis and Euler forces. Lateral walls, depending on the angle forming with the radial direction, can guide the particle either in the same or in the opposite direction to the centrifugal force, thus resulting in unusual particle trajectories including zig-zag or backwards particle motion. The effect is pronounced in the case of short operation times when the acceleration of the angular rotation, and thus the Euler force, is considerable. The predicted unusual motion is demonstrated by numerically solving the equation of motion in the presence of lateral walls and verified in the experiment with particles of density lower than that of the solvent. Our analysis is useful for design and operational considerations of Lab-On-a-Disc devices aiming for or involving (bio)particle handling.
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22
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Design Optimization of Centrifugal Microfluidic “Lab-on-a-Disc” Systems towards Fluidic Larger-Scale Integration. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11135839] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Enhancing the degree of functional multiplexing while assuring operational reliability and manufacturability at competitive costs are crucial ingredients for enabling comprehensive sample-to-answer automation, e.g., for use in common, decentralized “Point-of-Care” or “Point-of-Use” scenarios. This paper demonstrates a model-based “digital twin” approach, which efficiently supports the algorithmic design optimization of exemplary centrifugo-pneumatic (CP) dissolvable-film (DF) siphon valves toward larger-scale integration (LSI) of well-established “Lab-on-a-Disc” (LoaD) systems. Obviously, the spatial footprint of the valves and their upstream laboratory unit operations (LUOs) have to fit, at a given radial position prescribed by its occurrence in the assay protocol, into the locally accessible disc space. At the same time, the retention rate of a rotationally actuated CP-DF siphon valve and, most challengingly, its band width related to unavoidable tolerances of experimental input parameters need to slot into a defined interval of the practically allowed frequency envelope. To accomplish particular design goals, a set of parametrized metrics is defined, which are to be met within their practical boundaries while (numerically) minimizing the band width in the frequency domain. While each LSI scenario needs to be addressed individually on the basis of the digital twin, a suite of qualitative design rules and instructive showcases structures are presented.
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23
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Ducrée J. Secure Air Traffic Control at the Hub of Multiplexing on the Centrifugo-Pneumatic Lab-on-a-Disc Platform. MICROMACHINES 2021; 12:700. [PMID: 34203926 PMCID: PMC8232791 DOI: 10.3390/mi12060700] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/01/2021] [Accepted: 06/10/2021] [Indexed: 12/14/2022]
Abstract
Fluidic larger-scale integration (LSI) resides at the heart of comprehensive sample-to-answer automation and parallelization of assay panels for frequent and ubiquitous bioanalytical testing in decentralized point-of-use/point-of-care settings. This paper develops a novel "digital twin" strategy with an emphasis on rotational, centrifugo-pneumatic flow control. The underlying model systematically connects retention rates of rotationally actuated valves as a key element of LSI to experimental input parameters; for the first time, the concept of band widths in frequency space as the decisive quantity characterizing operational robustness is introduced, a set of quantitative performance metrics guiding algorithmic optimization of disc layouts is defined, and the engineering principles of advanced, logical flow control and timing are elucidated. Overall, the digital twin enables efficient design for automating multiplexed bioassay protocols on such "Lab-on-a-Disc" (LoaD) systems featuring high packing density, reliability, configurability, modularity, and manufacturability to eventually minimize cost, time, and risk of development and production.
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Affiliation(s)
- Jens Ducrée
- School of Physical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
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24
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Ma J, Wu Y, Liu Y, Ji Y, Yang M, Zhu H. Cell-sorting centrifugal microfluidic chip with a flow rectifier. LAB ON A CHIP 2021; 21:2129-2141. [PMID: 33928337 DOI: 10.1039/d1lc00217a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Centrifugal microfluidic chips offer rapid, highly integrable and simultaneous multi-channel microfluidic control without relying on external pressure pumps and pipelines. Current centrifugal microfluidic chips mainly separate particles of differing density based on the sedimentation method. However, in some biological cells, the volume difference is more notable than the density difference. In particular, cancer cells are generally larger than normal cells. The instability of particle velocity caused by the non-steady flow of the fluid in the centrifugal microfluidic chip leads to low separation purity of particles of different sizes. Thus, we propose herein a centrifugal microfluidic chip with a flow rectifier that transforms the centrifugal non-steady flow into locally steady flow with continuous flow. This chip resolves the problems caused by particle sedimentation in the sample chamber and non-steady flow and greatly improves the recovery ratio and separation purity of target particles. Therefore, it can be used to separate particles of differing size. The experimental results show that the chip can separate an equal-volume mixture of 25 μm and 12 μm polystyrene particles diluted 50 times with a ratio of 1 : 6 and obtain a recovery ratio and separation purity better than 95% for the 25 μm particles. In addition, rare tumour cells are separated from high-concentration white blood cells (ratio 1 : 25) with a recovery ratio of 90.4% ± 2.4% and separation purity of 83.0% ± 3.8%. In conclusion, this chip is promising for sorting of various biological cells and has significant potential for use in biomedical and clinical applications.
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Affiliation(s)
- Junyu Ma
- State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Sciences, Changchun, China. and School of optoelectronics, University of Chinese Academy of Sciences, Beijing, China
| | - Yihui Wu
- State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Sciences, Changchun, China.
| | - Yongshun Liu
- State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Sciences, Changchun, China.
| | - Yuan Ji
- State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP), Chinese Academy of Sciences, Changchun, China. and School of optoelectronics, University of Chinese Academy of Sciences, Beijing, China
| | - Mei Yang
- Department of Clinical Laboratory, The Second Hospital of Jilin University, Changchun, China
| | - Hongquan Zhu
- Department of Clinical Laboratory, The Second Hospital of Jilin University, Changchun, China
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25
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Obino D, Vassalli M, Franceschi A, Alessandrini A, Facci P, Viti F. An Overview on Microfluidic Systems for Nucleic Acids Extraction from Human Raw Samples. SENSORS 2021; 21:s21093058. [PMID: 33925730 PMCID: PMC8125272 DOI: 10.3390/s21093058] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/13/2021] [Accepted: 04/19/2021] [Indexed: 02/08/2023]
Abstract
Nucleic acid (NA) extraction is a basic step for genetic analysis, from scientific research to diagnostic and forensic applications. It aims at preparing samples for its application with biomolecular technologies such as isothermal and non-isothermal amplification, hybridization, electrophoresis, Sanger sequencing and next-generation sequencing. Multiple steps are involved in NA collection from raw samples, including cell separation from the rest of the specimen, cell lysis, NA isolation and release. Typically, this process needs molecular biology facilities, specialized instrumentation and labor-intensive operations. Microfluidic devices have been developed to analyze NA samples with high efficacy and sensitivity. In this context, the integration within the chip of the sample preparation phase is crucial to leverage the promise of portable, fast, user-friendly and economic point-of-care solutions. This review presents an overview of existing lab-on-a-chip (LOC) solutions designed to provide automated NA extraction from human raw biological fluids, such as whole blood, excreta (urine and feces), saliva. It mainly focuses on LOC implementation aspects, aiming to describe a detailed panorama of strategies implemented for different human raw sample preparations.
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Affiliation(s)
- Daniele Obino
- Institute of Biophysics, National Research Council, 16149 Genova, Italy; (D.O.); (F.V.)
| | - Massimo Vassalli
- Centre for the Cellular Microenvironment, James Watt School of Engineering, University of Glasgow, James Watt South Building, Glasgow G128LT, UK;
| | | | - Andrea Alessandrini
- Nanoscience Institute, National Research Council, 41125 Modena, Italy;
- Department of Physics, Informatics and Mathematics, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Paolo Facci
- Institute of Biophysics, National Research Council, 16149 Genova, Italy; (D.O.); (F.V.)
- Correspondence:
| | - Federica Viti
- Institute of Biophysics, National Research Council, 16149 Genova, Italy; (D.O.); (F.V.)
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26
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Wang C, Liu M, Wang Z, Li S, Deng Y, He N. Point-of-care diagnostics for infectious diseases: From methods to devices. NANO TODAY 2021; 37:101092. [PMID: 33584847 PMCID: PMC7864790 DOI: 10.1016/j.nantod.2021.101092] [Citation(s) in RCA: 210] [Impact Index Per Article: 70.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 01/22/2021] [Accepted: 01/23/2021] [Indexed: 05/04/2023]
Abstract
The current widespread of COVID-19 all over the world, which is caused by SARS-CoV-2 virus, has again emphasized the importance of development of point-of-care (POC) diagnostics for timely prevention and control of the pandemic. Compared with labor- and time-consuming traditional diagnostic methods, POC diagnostics exhibit several advantages such as faster diagnostic speed, better sensitivity and specificity, lower cost, higher efficiency and ability of on-site detection. To achieve POC diagnostics, developing POC detection methods and correlated POC devices is the key and should be given top priority. The fast development of microfluidics, micro electro-mechanical systems (MEMS) technology, nanotechnology and materials science, have benefited the production of a series of portable, miniaturized, low cost and highly integrated POC devices for POC diagnostics of various infectious diseases. In this review, various POC detection methods for the diagnosis of infectious diseases, including electrochemical biosensors, fluorescence biosensors, surface-enhanced Raman scattering (SERS)-based biosensors, colorimetric biosensors, chemiluminiscence biosensors, surface plasmon resonance (SPR)-based biosensors, and magnetic biosensors, were first summarized. Then, recent progresses in the development of POC devices including lab-on-a-chip (LOC) devices, lab-on-a-disc (LOAD) devices, microfluidic paper-based analytical devices (μPADs), lateral flow devices, miniaturized PCR devices, and isothermal nucleic acid amplification (INAA) devices, were systematically discussed. Finally, the challenges and future perspectives for the design and development of POC detection methods and correlated devices were presented. The ultimate goal of this review is to provide new insights and directions for the future development of POC diagnostics for the management of infectious diseases and contribute to the prevention and control of infectious pandemics like COVID-19.
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Affiliation(s)
- Chao Wang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, PR China
- Department of Biomedical Engineering, School of Biomedical Engineering and Informatics, Nanjing Medical University, Nanjing 211166, Jiangsu, PR China
| | - Mei Liu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, PR China
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, PR China
| | - Zhifei Wang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, PR China
| | - Song Li
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, PR China
| | - Yan Deng
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, PR China
| | - Nongyue He
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, PR China
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, PR China
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Henderson BD, Kinahan DJ, Rio J, Mishra R, King D, Torres-Delgado SM, Mager D, Korvink JG, Ducrée J. Siphon-Controlled Automation on a Lab-on-a-Disc Using Event-Triggered Dissolvable Film Valves. BIOSENSORS-BASEL 2021; 11:bios11030073. [PMID: 33800811 PMCID: PMC8000095 DOI: 10.3390/bios11030073] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 02/24/2021] [Accepted: 03/02/2021] [Indexed: 12/14/2022]
Abstract
Within microfluidic technologies, the centrifugal microfluidic “Lab-on-a-Disc” (LoaD) platform offers great potential for use at the PoC and in low-resource settings due to its robustness and the ability to port and miniaturize ‘wet bench’ laboratory protocols. We present the combination of ‘event-triggered dissolvable film valves’ with a centrifugo-pneumatic siphon structure to enable control and timing, through changes in disc spin-speed, of the release and incubations of eight samples/reagents/wash buffers. Based on these microfluidic techniques, we integrated and automated a chemiluminescent immunoassay for detection of the CVD risk factor marker C-reactive protein displaying a limit of detection (LOD) of 44.87 ng mL−1 and limit of quantitation (LoQ) of 135.87 ng mL−1.
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Affiliation(s)
- Brian D. Henderson
- School of Physical Sciences, Dublin City University, Dublin 9, Ireland; (B.D.H.); (J.R.)
| | - David J. Kinahan
- School of Mechanical Engineering, Dublin City University, Dublin 9, Ireland;
- National Center for Sensor Research, Dublin City University, Dublin 9, Ireland
- I-Form, the SFI Research Centre for Advanced Manufacturing, Dublin City University, Dublin 9, Ireland
- The Water Institute, Dublin City University, Dublin 9, Ireland
| | - Jeanne Rio
- School of Physical Sciences, Dublin City University, Dublin 9, Ireland; (B.D.H.); (J.R.)
| | - Rohit Mishra
- Fraunhofer Project Center, Dublin City University, Dublin 9, Ireland; (R.M.); (D.K.)
| | - Damien King
- Fraunhofer Project Center, Dublin City University, Dublin 9, Ireland; (R.M.); (D.K.)
| | - Sarai M. Torres-Delgado
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, 76344 Karlsruhe, Germany; (S.M.T.-D.); (D.M.); (J.G.K.)
| | - Dario Mager
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, 76344 Karlsruhe, Germany; (S.M.T.-D.); (D.M.); (J.G.K.)
| | - Jan G. Korvink
- Institute of Microstructure Technology, Karlsruhe Institute of Technology, 76344 Karlsruhe, Germany; (S.M.T.-D.); (D.M.); (J.G.K.)
| | - Jens Ducrée
- School of Physical Sciences, Dublin City University, Dublin 9, Ireland; (B.D.H.); (J.R.)
- Correspondence: ; Tel.: +353-1-700-5377
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Perebikovsky A, Liu Y, Hwu A, Kido H, Shamloo E, Song D, Monti G, Shoval O, Gussin D, Madou M. Rapid sample preparation for detection of antibiotic resistance on a microfluidic disc platform. LAB ON A CHIP 2021; 21:534-545. [PMID: 33393956 DOI: 10.1039/d0lc00838a] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Rapid, point-of-care (PoC) diagnostics for antibiotic susceptibility testing (AST) are critical in combating the antimicrobial resistance epidemic. While new, alternative technologies are capable of rapidly identifying antibiotic resistance, traditional AST methods, where a patient sample is incubated with different antibiotics, remain the most reliable and practical in determining antibiotic effectiveness. Here, we demonstrate a novel sample incubation technique on a microfluidic centrifugal disc (CD) as a proof of concept automated sample processing platform for AST. By using ribosomal RNA (rRNA) as a marker for cell growth, we demonstrated that incubation on the microfluidic CD was enhanced (>1.6 fold) for 11 out of 14 clinically relevant isolates of Escherichia coli compared to traditional shaker incubators. Finally, we utilize the system to identify antibiotic resistance of 11 E. coli isolates incubated with 5 different antibiotics in under 2 hours.
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Affiliation(s)
- Alexandra Perebikovsky
- Department of Physics and Astronomy, University of California, 4129 Frederick Reines Hall, Irvine, CA 92697, USA.
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Lim T, Kim EG, Choi J, Kwon S. A high-throughput cell culture system based on capillary and centrifugal actions for rapid antimicrobial susceptibility testing. LAB ON A CHIP 2020; 20:4552-4560. [PMID: 33169754 DOI: 10.1039/d0lc00753f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Antibiotic resistance is a global threat to modern society. Rapid determination of suitable antibiotics that inhibit bacterial growth can effectively reduce antibiotic resistance and improve clinical treatment. The conventional methods of antimicrobial susceptibility testing (AST) depend on optical density measurements, which require long-time incubation. Various kinds of rapid AST systems which utilize various technologies from the field of lab on a chip have promised a great reduction in measurement time, but cannot achieve high-throughput, user-friendly testing due to the complexity of the testing system. Here, we introduce a capillary and centrifuge-based rapid AST system that reduces the time of loading the sample and culture media while achieving a high-throughput testing capacity. The capability of the proposed system is validated in a systematic analysis that includes sample loading characteristics and AST trials with standard strains. The proposed system provides a useful tool for drug testing in cell-culture systems with user-friendly and high-throughput analysis.
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Affiliation(s)
- Taegeun Lim
- QuantaMatrix Inc., Seoul National University Hospital CMI, Seoul, 03082, Republic of Korea and Department of Electrical Engineering and Computer Science, Seoul National University, Seoul, 08826, Republic of Korea.
| | - Eun-Geun Kim
- Lowendtechnologies Co., Anyang, 14056, Republic of Korea
| | - Jungil Choi
- School of Mechanical Engineering, Kookmin University, Seoul, 02707, Republic of Korea.
| | - Sunghoon Kwon
- QuantaMatrix Inc., Seoul National University Hospital CMI, Seoul, 03082, Republic of Korea and Department of Electrical Engineering and Computer Science, Seoul National University, Seoul, 08826, Republic of Korea.
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Abstract
Lab-on-a-Disc (LoaD) biosensors are increasingly a promising solution for many biosensing applications. In the search for a perfect match between point-of-care (PoC) microfluidic devices and biosensors, the LoaD platform has the potential to be reliable, sensitive, low-cost, and easy-to-use. The present global pandemic draws attention to the importance of rapid sample-to-answer PoC devices for minimising manual intervention and sample manipulation, thus increasing the safety of the health professional while minimising the chances of sample contamination. A biosensor is defined by its ability to measure an analyte by converting a biological binding event to tangible analytical data. With evolving manufacturing processes for both LoaDs and biosensors, it is becoming more feasible to embed biosensors within the platform and/or to pair the microfluidic cartridges with low-cost detection systems. This review considers the basics of the centrifugal microfluidics and describes recent developments in common biosensing methods and novel technologies for fluidic control and automation. Finally, an overview of current devices on the market is provided. This review will guide scientists who want to initiate research in LoaD PoC devices as well as providing valuable reference material to researchers active in the field.
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Qin Z, Peng R, Baravik IK, Liu X. Fighting COVID-19: Integrated Micro- and Nanosystems for Viral Infection Diagnostics. MATTER 2020; 3:628-651. [PMID: 32838297 PMCID: PMC7346839 DOI: 10.1016/j.matt.2020.06.015] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The pandemic of coronavirus disease 2019 (COVID-19) highlights the importance of rapid and sensitive diagnostics of viral infection that enables the efficient tracing of cases and the implementation of public health measures for disease containment. The immediate actions from both academia and industry have led to the development of many COVID-19 diagnostic systems that have secured fast-track regulatory approvals and have been serving our healthcare frontlines since the early stage of the pandemic. On diagnostic technologies, many of these clinically validated systems have significantly benefited from the recent advances in micro- and nanotechnologies in terms of platform design, analytical method, and system integration and miniaturization. The continued development of new diagnostic platforms integrating micro- and nanocomponents will address some of the shortcomings we have witnessed in the existing COVID-19 diagnostic systems. This Perspective reviews the previous and ongoing research efforts on developing integrated micro- and nanosystems for nucleic acid-based virus detection, and highlights promising technologies that could provide better solutions for the diagnosis of COVID-19 and other viral infectious diseases. With the summary and outlook of this rapidly evolving research field, we hope to inspire more research and development activities to better prepare our society for future public health crises.
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Affiliation(s)
- Zhen Qin
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada
| | - Ran Peng
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada
| | - Ilina Kolker Baravik
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada
| | - Xinyu Liu
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, ON M5S 3G8, Canada
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, ON M5S 3G9, Canada
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Nasiri R, Shamloo A, Akbari J, Tebon P, R. Dokmeci M, Ahadian S. Design and Simulation of an Integrated Centrifugal Microfluidic Device for CTCs Separation and Cell Lysis. MICROMACHINES 2020; 11:E699. [PMID: 32698447 PMCID: PMC7407509 DOI: 10.3390/mi11070699] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 07/10/2020] [Accepted: 07/15/2020] [Indexed: 01/02/2023]
Abstract
Separation of circulating tumor cells (CTCs) from blood samples and subsequent DNA extraction from these cells play a crucial role in cancer research and drug discovery. Microfluidics is a versatile technology that has been applied to create niche solutions to biomedical applications, such as cell separation and mixing, droplet generation, bioprinting, and organs on a chip. Centrifugal microfluidic biochips created on compact disks show great potential in processing biological samples for point of care diagnostics. This study investigates the design and numerical simulation of an integrated microfluidic device, including a cell separation unit for isolating CTCs from a blood sample and a micromixer unit for cell lysis on a rotating disk platform. For this purpose, an inertial microfluidic device was designed for the separation of target cells by using contraction-expansion microchannel arrays. Additionally, a micromixer was incorporated to mix separated target cells with the cell lysis chemical reagent to dissolve their membranes to facilitate further assays. Our numerical simulation approach was validated for both cell separation and micromixer units and corroborates existing experimental results. In the first compartment of the proposed device (cell separation unit), several simulations were performed at different angular velocities from 500 rpm to 3000 rpm to find the optimum angular velocity for maximum separation efficiency. By using the proposed inertial separation approach, CTCs, were successfully separated from white blood cells (WBCs) with high efficiency (~90%) at an angular velocity of 2000 rpm. Furthermore, a serpentine channel with rectangular obstacles was designed to achieve a highly efficient micromixer unit with high mixing quality (~98%) for isolated CTCs lysis at 2000 rpm.
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Affiliation(s)
- Rohollah Nasiri
- Department of Mechanical Engineering, Sharif University of Technology, Tehran 11365-11155, Iran; (R.N.); (J.A.)
- Center for Minimally Invasive Therapeutics (C-MIT), University of California—Los Angeles, Los Angeles, CA 90095, USA; (P.T.); (M.R.D.)
- Department of Bioengineering, University of California—Los Angeles, Los Angeles, CA 90095, USA
| | - Amir Shamloo
- Department of Mechanical Engineering, Sharif University of Technology, Tehran 11365-11155, Iran; (R.N.); (J.A.)
| | - Javad Akbari
- Department of Mechanical Engineering, Sharif University of Technology, Tehran 11365-11155, Iran; (R.N.); (J.A.)
| | - Peyton Tebon
- Center for Minimally Invasive Therapeutics (C-MIT), University of California—Los Angeles, Los Angeles, CA 90095, USA; (P.T.); (M.R.D.)
- Department of Bioengineering, University of California—Los Angeles, Los Angeles, CA 90095, USA
| | - Mehmet R. Dokmeci
- Center for Minimally Invasive Therapeutics (C-MIT), University of California—Los Angeles, Los Angeles, CA 90095, USA; (P.T.); (M.R.D.)
- Department of Bioengineering, University of California—Los Angeles, Los Angeles, CA 90095, USA
- Department of Radiological Sciences, David Geffen School of Medicine, University of California-Los Angeles, Los Angeles, CA 90095, USA
| | - Samad Ahadian
- Center for Minimally Invasive Therapeutics (C-MIT), University of California—Los Angeles, Los Angeles, CA 90095, USA; (P.T.); (M.R.D.)
- Department of Bioengineering, University of California—Los Angeles, Los Angeles, CA 90095, USA
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Nasiri R, Shamloo A, Ahadian S, Amirifar L, Akbari J, Goudie MJ, Lee K, Ashammakhi N, Dokmeci MR, Di Carlo D, Khademhosseini A. Microfluidic-Based Approaches in Targeted Cell/Particle Separation Based on Physical Properties: Fundamentals and Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2000171. [PMID: 32529791 DOI: 10.1002/smll.202000171] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 03/15/2020] [Indexed: 06/11/2023]
Abstract
Cell separation is a key step in many biomedical research areas including biotechnology, cancer research, regenerative medicine, and drug discovery. While conventional cell sorting approaches have led to high-efficiency sorting by exploiting the cell's specific properties, microfluidics has shown great promise in cell separation by exploiting different physical principles and using different properties of the cells. In particular, label-free cell separation techniques are highly recommended to minimize cell damage and avoid costly and labor-intensive steps of labeling molecular signatures of cells. In general, microfluidic-based cell sorting approaches can separate cells using "intrinsic" (e.g., fluid dynamic forces) versus "extrinsic" external forces (e.g., magnetic, electric field, etc.) and by using different properties of cells including size, density, deformability, shape, as well as electrical, magnetic, and compressibility/acoustic properties to select target cells from a heterogeneous cell population. In this work, principles and applications of the most commonly used label-free microfluidic-based cell separation methods are described. In particular, applications of microfluidic methods for the separation of circulating tumor cells, blood cells, immune cells, stem cells, and other biological cells are summarized. Computational approaches complementing such microfluidic methods are also explained. Finally, challenges and perspectives to further develop microfluidic-based cell separation methods are discussed.
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Affiliation(s)
- Rohollah Nasiri
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, 11365-11155, Iran
| | - Amir Shamloo
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, 11365-11155, Iran
| | - Samad Ahadian
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, CA, 90024, USA
| | - Leyla Amirifar
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, 11365-11155, Iran
| | - Javad Akbari
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, 11365-11155, Iran
| | - Marcus J Goudie
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - KangJu Lee
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Nureddin Ashammakhi
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Radiological Sciences, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Mehmet R Dokmeci
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, CA, 90024, USA
- Department of Radiological Sciences, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Dino Di Carlo
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Ali Khademhosseini
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Terasaki Institute for Biomedical Innovation (TIBI), Los Angeles, CA, 90024, USA
- Department of Radiological Sciences, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, USA
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Maejima K, Hiruta Y, Citterio D. Centrifugal Paperfluidic Platform for Accelerated Distance-Based Colorimetric Signal Readout. Anal Chem 2020; 92:4749-4754. [DOI: 10.1021/acs.analchem.9b05782] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Kento Maejima
- Department of Applied Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Yuki Hiruta
- Department of Applied Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Daniel Citterio
- Department of Applied Chemistry, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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Ahmed H, Ramesan S, Lee L, Rezk AR, Yeo LY. On-Chip Generation of Vortical Flows for Microfluidic Centrifugation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e1903605. [PMID: 31535785 DOI: 10.1002/smll.201903605] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 08/20/2019] [Indexed: 05/21/2023]
Abstract
Microcentrifugation constitutes an important part of the microfluidic toolkit in a similar way that centrifugation is crucial to many macroscopic procedures, given that micromixing, sample preconcentration, particle separation, component fractionation, and cell agglomeration are essential operations in small scale processes. Yet, the dominance of capillary and viscous effects, which typically tend to retard flow, over inertial and gravitational forces, which are often useful for actuating flows and hence centrifugation, at microscopic scales makes it difficult to generate rotational flows at these dimensions, let alone with sufficient vorticity to support efficient mixing, separation, concentration, or aggregation. Herein, the various technologies-both passive and active-that have been developed to date for vortex generation in microfluidic devices are reviewed. Various advantages or limitations associated with each are outlined, in addition to highlighting the challenges that need to be overcome for their incorporation into integrated microfluidic devices.
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Affiliation(s)
- Heba Ahmed
- Micro/Nanophysics Research Laboratory, School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | - Shwathy Ramesan
- Micro/Nanophysics Research Laboratory, School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | - Lillian Lee
- Micro/Nanophysics Research Laboratory, School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | - Amgad R Rezk
- Micro/Nanophysics Research Laboratory, School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
| | - Leslie Y Yeo
- Micro/Nanophysics Research Laboratory, School of Engineering, RMIT University, Melbourne, VIC, 3000, Australia
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36
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Li L, Miao B, Li Z, Sun Z, Peng N. Sample-to-Answer Hepatitis B Virus DNA Detection from Whole Blood on a Centrifugal Microfluidic Platform with Double Rotation Axes. ACS Sens 2019; 4:2738-2745. [PMID: 31502439 DOI: 10.1021/acssensors.9b01270] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A point-of-care apparatus for hepatitis virus detection requires simple and easy-to-use processing steps and should have the same diagnostic capability as that in the central laboratory. However, no automated and efficient methods for hepatitis B virus (HBV) sample-to-answer detection include serum separation, and complete prestorage of reagents has been developed. We developed an automated sample-to-answer disc for rapid HBV detection from whole blood based on a double rotation axes centrifugal microfluidic platform. The disc with complete prestorage of reagents features fully automated and integrated serum separation from whole blood, magnetic bead-based DNA extraction, aliquoting of the nucleic acid, and real-time polymerase chain reaction. A laser diode for sequential release of prestored liquid reagents was used. Processing merely requires manual loading of the sample into the disc. We demonstrate successful sample-to-answer detection of HBV in a 500 μL whole blood sample with sample concentrations down to 102 copies/mL. The total time of the whole detection from sample-to-result is about 48 min. The disc provides a user-friendly molecular diagnostic system for rapid analysis of HBV without demanding a complicated laboratory instrument and major manual operation time. Overall, the results indicated that the developed disc could be used for HBV molecular diagnosis.
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Affiliation(s)
- Lei Li
- State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710054, Shaanxi, China
| | - Baogang Miao
- State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710054, Shaanxi, China
| | - Zheng Li
- State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710054, Shaanxi, China
| | - Zhengming Sun
- Shaanxi Provincial People’s Hospital, Xi’an 710068, Shaanxi, China
| | - Niancai Peng
- State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an 710054, Shaanxi, China
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37
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Hui Y, Liu Y, Tang WC, Song D, Madou M, Xia S, Wu T. Determination of Mercury(II) on A Centrifugal Microfluidic Device Using Ionic Liquid Dispersive Liquid-Liquid Microextraction. MICROMACHINES 2019; 10:mi10080523. [PMID: 31398936 PMCID: PMC6723164 DOI: 10.3390/mi10080523] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 07/30/2019] [Accepted: 08/05/2019] [Indexed: 12/14/2022]
Abstract
An integrated centrifugal microfluidic device was developed to preconcentrate and detect hazardous mercury (II) in water with ionic liquid as environmentally friendly extractant. An automatically salt-controlled ionic liquid dispersive liquid–liquid microextraction on a centrifugal microfluidic device was designed, fabricated, and characterized. The entire liquid transport mixing and separation process was controlled by rotation speed, siphon valves, and capillary valves. Still frame images on the rotating device showed the process in detail, revealing the sequential steps of mixing, siphon priming, transportation between chambers, and phase separation. The preconcentration of red dye could be clearly observed with the naked eye. By combining fluorescence probe and microscopy techniques, the device was tested to determine ppb-level mercury (II) in water, and was found to exhibit good linearity and low detection limit.
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Affiliation(s)
- Yun Hui
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Yujia Liu
- Department of Mechanical & Aerospace Engineering, University of California, Irvine, CA 92697, USA
| | - William C Tang
- Department of Biomedical Engineering, University of California, Irvine, CA 92697, USA
| | - Dian Song
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, CA 92697, USA
| | - Marc Madou
- Department of Mechanical & Aerospace Engineering, University of California, Irvine, CA 92697, USA
| | - Shanhong Xia
- Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
| | - Tianzhun Wu
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
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Öztürk Ö, Servantie J. Statics and dynamics of polymeric droplets on chemically homogeneous and heterogeneous substrates. Phys Rev E 2019; 100:023113. [PMID: 31574604 DOI: 10.1103/physreve.100.023113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Indexed: 06/10/2023]
Abstract
We present a molecular dynamics study of the motion of cylindrical polymer droplets on striped surfaces. We first consider the equilibrium properties of droplets on different surfaces, we show that for small stripes the Cassie-Baxter equation gives a good approximation of the equilibrium contact angle. As the stripe width becomes nonnegligible compared to the dimension of the droplet, it has to deform significantly to minimize its free energy; this results in a smaller value of the contact angle than the continuum model predicts. We then evaluate the slip length and thus the damping coefficient as a function of the stripe width. For very small stripes, the heterogeneous surface behaves as an effective surface, with the same damping as a homogeneous surface with the same contact angle. However, as the stripe width increases, damping at the surface increases until reaching a plateau. Afterwards, we study the dynamics of droplets under a bulk force. We show that if the stripes are large enough the droplets are pinned until a critical force. The critical force increases linearly with stripe width. For large enough forces, the average velocity increases linearly with the force, we show that it can then be predicted by a model depending only on droplet size, contact angle, viscosity, and slip length. We show that the velocity of the droplet varies sinusoidally as a function of its position on the substrate. However, for bulk forces just above the depinning force we observe a characteristic stick-slip motion, with successive pinnings and depinnings.
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Affiliation(s)
- Ö Öztürk
- Department of Physics, Istanbul Technical University, Maslak 34469, Istanbul, Turkey
| | - J Servantie
- Department of Physics, Istanbul Technical University, Maslak 34469, Istanbul, Turkey
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Chircov C, Grumezescu AM, Holban AM. Magnetic Particles for Advanced Molecular Diagnosis. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E2158. [PMID: 31284393 PMCID: PMC6651565 DOI: 10.3390/ma12132158] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 07/02/2019] [Accepted: 07/03/2019] [Indexed: 12/17/2022]
Abstract
Molecular diagnosis is the field that aims to develop nucleic-acid-based analytical methods for biological markers and gene expression assessments by combining laboratory medicine and molecular genetics. As it gradually becomes a clinical reality, molecular diagnosis could benefit from improvements resulting from thorough studies that could enhance the accuracy of these methods. The application of magnetic particles in molecular diagnosis tools has led to tremendous breakthroughs in terms of specificity, sensitivity, and discrimination in bioassays. Therefore, the aim of this review is to highlight the principles involved in the implementation of magnetic particles for sample preparation and targeted analyte isolation, purification, and extraction. Furthermore, the most recent advancements in the area of cancer and infectious disease diagnosis are presented, with an emphasis on screening and early stage detection.
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Affiliation(s)
- Cristina Chircov
- Faculty of Applied Chemistry and Materials Science, Politehnica University of Bucharest, 011061 Bucharest, Romania
| | - Alexandru Mihai Grumezescu
- Faculty of Applied Chemistry and Materials Science, Politehnica University of Bucharest, 011061 Bucharest, Romania.
| | - Alina Maria Holban
- Microbiology Immunology Department, Faculty of Biology, University of Bucharest, 050095 Bucharest, Romania
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Kalsi S, Valiadi M, Turner C, Sutton M, Morgan H. Sample pre-concentration on a digital microfluidic platform for rapid AMR detection in urine. LAB ON A CHIP 2018; 19:168-177. [PMID: 30516215 DOI: 10.1039/c8lc01249k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
There is a growing need for rapid diagnostic methods to support stewardship of antibiotics.
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Affiliation(s)
- Sumit Kalsi
- Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, UK.
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41
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Mahmodi Arjmand E, Saadatmand M, Bakhtiari M, Eghbal M. Design and fabrication of a centrifugal microfluidic disc including septum valve for measuring hemoglobin A1c in human whole blood using immunoturbidimetry method. Talanta 2018; 190:134-139. [DOI: 10.1016/j.talanta.2018.07.081] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 07/25/2018] [Accepted: 07/25/2018] [Indexed: 12/14/2022]
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Torres Delgado SM, Korvink JG, Mager D. The eLoaD platform endows centrifugal microfluidics with on-disc power and communication. Biosens Bioelectron 2018; 117:464-473. [DOI: 10.1016/j.bios.2018.05.056] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 05/24/2018] [Accepted: 05/29/2018] [Indexed: 01/18/2023]
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43
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Lim H, Back SM, Nam J, Choi H. Determination of red blood cell deformability using centrifugal force in a three-dimensional-printed mini-disk (3D-PMD). PLoS One 2018; 13:e0197619. [PMID: 29787582 PMCID: PMC5963765 DOI: 10.1371/journal.pone.0197619] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 05/05/2018] [Indexed: 01/15/2023] Open
Abstract
Measuring red blood cell (RBC) deformability has become important for clinical disease diagnostics. Various methods for measuring RBC deformability have been developed; however, they require costly and large instruments, long measuring time, and skilled personnel. In this study, we present a three-dimensional-printed mini-disk (3D-PMD) for measuring RBC deformability to overcome the previous limitations. For a miniaturized and low-cost setup, the 3D-PMD was fabricated by a 3D printing technique, which had not yet been used for fabricating a lab-on-a-compact disk (LOCD). Using a 3D printing technique, a multi-layered fluidic channel on the mini CD could be fabricated easily. During rotation by a spinning motor, the difference of the length of compressed RBCs in the fluidic channel was measured and analysed as compressibility indices (CIs) of normal and glutaraldehyde-treated hardened RBCs. The rotation speed and time were decided as 3000 rpm and 30 min, respectively, at which the difference of CI values between normal and hardened RBCs was largest (CInormal-CIhardened = 0.195).
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Affiliation(s)
- Hyunjung Lim
- Department of Medical Sciences, Graduate School of Medicine, Korea University, Guro-gu, Seoul, Korea
| | - Seung Min Back
- Department of Medical Sciences, Graduate School of Medicine, Korea University, Guro-gu, Seoul, Korea
| | - Jeonghun Nam
- Department of Laboratory Medicine, College of Medicine, Korea University, Guro-gu, Seoul, Korea
- Department of Emergency Medicine, College of Medicine, Korea University, Guro-gu, Seoul, Korea
- * E-mail: (JN); (HC)
| | - Hyuk Choi
- Department of Medical Sciences, Graduate School of Medicine, Korea University, Guro-gu, Seoul, Korea
- * E-mail: (JN); (HC)
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Choi G, Prince T, Miao J, Cui L, Guan W. Sample-to-answer palm-sized nucleic acid testing device towards low-cost malaria mass screening. Biosens Bioelectron 2018; 115:83-90. [PMID: 29803865 DOI: 10.1016/j.bios.2018.05.019] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 04/29/2018] [Accepted: 05/10/2018] [Indexed: 12/22/2022]
Abstract
The effectiveness of malaria screening and treatment highly depends on the low-cost access to the highly sensitive and specific malaria test. We report a real-time fluorescence nucleic acid testing device for malaria field detection with automated and scalable sample preparation capability. The device consists a compact analyzer and a disposable microfluidic reagent compact disc. The parasite DNA sample preparation and subsequent real-time LAMP detection were seamlessly integrated on a single microfluidic compact disc, driven by energy efficient non-centrifuge based magnetic field interactions. Each disc contains four parallel testing units which could be configured either as four identical tests or as four species-specific tests. When configured as species-specific tests, it could identify two of the most life-threatening malaria species (P. falciparum and P. vivax). The NAT device is capable of processing four samples simultaneously within 50 min turnaround time. It achieves a detection limit of ~0.5 parasites/µl for whole blood, sufficient for detecting asymptomatic parasite carriers. The combination of the sensitivity, specificity, cost, and scalable sample preparation suggests the real-time fluorescence LAMP device could be particularly useful for malaria screening in the field settings.
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Affiliation(s)
- Gihoon Choi
- Department of Electrical Engineering, Pennsylvania State University, University Park 16802, USA
| | - Theodore Prince
- Department of Electrical Engineering, Pennsylvania State University, University Park 16802, USA
| | - Jun Miao
- Department of Entomology, Pennsylvania State University, University Park 16802, USA
| | - Liwang Cui
- Department of Entomology, Pennsylvania State University, University Park 16802, USA
| | - Weihua Guan
- Department of Electrical Engineering, Pennsylvania State University, University Park 16802, USA; Department of Biomedical Engineering, Pennsylvania State University, University Park 16802, USA.
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Wang G, Tan J, Tang M, Zhang C, Zhang D, Ji W, Chen J, Ho HP, Zhang X. Binary centrifugal microfluidics enabling novel, digital addressable functions for valving and routing. LAB ON A CHIP 2018; 18:1197-1206. [PMID: 29546267 DOI: 10.1039/c8lc00026c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Centrifugal microfluidics or lab-on-a-disc (LOAD) is a promising branch of lab-on-a-chip or microfluidics. Besides effective fluid transportation and inherently available density-based sample separation in centrifugal microfluidics, uniform actuation of flow on the disc makes the platform compact and scalable. However, the natural radially outward centrifugal force in a LOAD system limits its capacity to perform complex fluid manipulation steps. In order to increase the fluid manipulation freedom and integration capacity of the LOAD system, we propose a binary centrifugal microfluidics platform. With the help of Euler force, our platform allows free switching of both left and right states based on a rather simple mechanical structure. The periodical switching of state would provide a "clock" signal for a sequence of droplet binary logic operations. With the binary state platform and the "clock" signal, we can accurately handle the droplet separately in each time step with a maximum main frequency of about 10 S s-1 (switching per second). Apart from droplet manipulations such as droplet generation and metering, we also demonstrate a series of droplet logic operations, such as binary valving, droplet routing and digital addressable droplet storage. Furthermore, complex bioassays such as the Bradford assay and DNA purification assay are demonstrated on a binary platform, which is totally impossible for a traditional LOAD system. Our binary platform largely improves the capability for logic operation on the LOAD platform, and it is a simple and promising approach for microfluidic lab-on-a-disc large-scale integration.
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Affiliation(s)
- Guanghui Wang
- College of Engineering and Applied Sciences, Nanjing University, Jiangsu 210093, China.
| | - Jie Tan
- College of Engineering and Applied Sciences, Nanjing University, Jiangsu 210093, China.
| | - Minghui Tang
- Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, P. R. China.
| | - Changbin Zhang
- Nanjing University of Chinese Medicine, Nanjing, P.R. China
| | - Dongying Zhang
- College of Engineering and Applied Sciences, Nanjing University, Jiangsu 210093, China.
| | - Wenbin Ji
- College of Engineering and Applied Sciences, Nanjing University, Jiangsu 210093, China.
| | - Junhao Chen
- Department of Clinical Laboratory, Gulou Hospital, Nanjing University, Jiangsu, China
| | - Ho-Pui Ho
- Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, P. R. China.
| | - Xuping Zhang
- College of Engineering and Applied Sciences, Nanjing University, Jiangsu 210093, China.
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Duchesne L, Lacombe K. Innovative technologies for point-of-care testing of viral hepatitis in low-resource and decentralized settings. J Viral Hepat 2018; 25:108-117. [PMID: 29134742 DOI: 10.1111/jvh.12827] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2017] [Accepted: 09/18/2017] [Indexed: 12/13/2022]
Abstract
According to the Global Burden of Diseases, chronic viral hepatitis B and C are one of the most challenging global health conditions that rank among the first causes of morbidity and mortality worldwide. Low- and middle-income countries are particularly affected by the health burden associated with HBV or HCV infection. One major gap in efficiently addressing the issue of viral hepatitis is universal screening. However, the costs and chronic lack of human resources for using traditional screening strategies based on serology and molecular biology preclude any scaling-up. Point-of-care tests have been deemed a powerful potential solution to fill the current diagnostics gap in low-resource and decentralized settings. Despite high interest resulting from their development in recent years, very few point-of-care devices have reached the market. Scaling down and automating all testing steps in 1 single device (eg, sample preparation, detection and readout) is indeed challenging. But innovations in multiple disciplines such as nanotechnologies, microfluidics, biosensors and synthetic biology have led to the creation of chip-sized laboratory systems called "lab-on-a-chip" devices. This review aims to explain how these innovations can overcome technological barriers that usually arise for each testing step while developing integrated point-of-care tests. Point-of-care test prototypes rarely meet the requirements for mass production, which also hinders their large-scale production. In addition to logistical hurdles, legal and economic constraints specific to the commercialization of in vitro diagnostics, which have also participated in the low transfer of innovative point-of-care tests to the field, are discussed.
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Affiliation(s)
- L Duchesne
- Sorbonne Universités, UPMC Univ Paris, Paris, France.,Inserm, Institut Pierre Louis d'épidémiologie et de Santé Publique (IPLESP UMRS 1136), Paris, France
| | - K Lacombe
- Sorbonne Universités, UPMC Univ Paris, Paris, France.,Inserm, Institut Pierre Louis d'épidémiologie et de Santé Publique (IPLESP UMRS 1136), Paris, France.,Service de maladies infectieuses et tropicales, Hôpital Saint-Antoine, Paris, France
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47
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Svalova TS, Malysheva NN, Kozitsina AN. Structure of the receptor layer in electrochemical immunosensors. Modern trends and prospects of development. Russ Chem Bull 2018. [DOI: 10.1007/s11172-017-1951-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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48
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Abd Rahman N, Ibrahim F, Ainehvand MM, Yusof R, Madou M. An Effect of Magnetic Beads to Boesenbergia rotunda Antioxidant Activity Using Photoprotective Microfluidic CD. IFMBE PROCEEDINGS 2018:139-144. [DOI: 10.1007/978-981-10-7554-4_24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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49
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Choi J, Kang D, Han S, Kim SB, Rogers JA. Thin, Soft, Skin-Mounted Microfluidic Networks with Capillary Bursting Valves for Chrono-Sampling of Sweat. Adv Healthc Mater 2017; 6. [PMID: 28105745 DOI: 10.1002/adhm.201601355] [Citation(s) in RCA: 137] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 12/05/2016] [Indexed: 12/14/2022]
Abstract
Systems for time sequential capture of microliter volumes of sweat released from targeted regions of the skin offer the potential to enable analysis of temporal variations in electrolyte balance and biomarker concentration throughout a period of interest. Current methods that rely on absorbent pads taped to the skin do not offer the ease of use in sweat capture needed for quantitative tracking; emerging classes of electronic wearable sweat analysis systems do not directly manage sweat-induced fluid flows for sample isolation. Here, a thin, soft, "skin-like" microfluidic platform is introduced that bonds to the skin to allow for collection and storage of sweat in an interconnected set of microreservoirs. Pressure induced by the sweat glands drives flow through a network of microchannels that incorporates capillary bursting valves designed to open at different pressures, for the purpose of passively guiding sweat through the system in sequential fashion. A representative device recovers 1.8 µL volumes of sweat each from 0.8 min of sweating into a set of separate microreservoirs, collected from 0.03 cm2 area of skin with approximately five glands, corresponding to a sweat rate of 0.60 µL min-1 per gland. Human studies demonstrate applications in the accurate chemical analysis of lactate, sodium, and potassium concentrations and their temporal variations.
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Affiliation(s)
- Jungil Choi
- Department of Materials Science and Engineering; Northwestern University; Evanston IL 60208 USA
| | - Daeshik Kang
- Department of Mechanical Engineering; Ajou University; San 5, Woncheon-Dong Yeongtong-Gu, Suwon 16499 South Korea
| | - Seungyong Han
- Department of Materials Science and Engineering; Frederick Seitz Materials Research Laboratory; University of Illinois at Urbana-Champaign; Urbana IL 61801 USA
| | - Sung Bong Kim
- Department of Materials Science and Engineering; Frederick Seitz Materials Research Laboratory; University of Illinois at Urbana-Champaign; Urbana IL 61801 USA
| | - John A. Rogers
- Center for Bio-Integrated Electronics; Departments of Materials Science and Engineering, Biomedical Engineering, Chemistry, Mechanical Engineering, Electrical Engineering and Computer Science, and Neurological Surgery; Simpson Querrey Institute for Nano/Biotechnology; McCormick School of Engineering and Feinberg School of Medicine; Northwestern University; Evanston IL 60208 USA
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50
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Kim TH, Sunkara V, Park J, Kim CJ, Woo HK, Cho YK. A lab-on-a-disc with reversible and thermally stable diaphragm valves. LAB ON A CHIP 2016; 16:3741-3749. [PMID: 27534824 DOI: 10.1039/c6lc00629a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A lab-on-a-disc is a unique microfluidic platform that utilizes centrifugal force to pump liquids. This offers many benefits for point-of-care devices because it eliminates the need for connections to multiple pumps and complex tubing connections. A wide range of applications including clinical chemistry, immunoassay, cell analysis, and nucleic acid tests could be demonstrated on a spinning disc. To enable the performance of assays in a fully integrated and automated manner, the robust actuation of integrated valves is a prerequisite. However, conventional passive-type valves incur a critical drawback in that their operation is dependent on the rotational frequency, which is easily influenced by the channel geometry and chemistry, in addition to the physical properties of the liquids to be transferred. Even though a few active-type valving techniques permit the individual actuation of valves, independent of the rotational frequency, complex procedures for the fabrication as well as actuation mechanisms have prevented their broader acceptance in general applications. Here, we report on a lab-on-a-disc incorporating individually addressable diaphragm valves (ID valves) that enable the reversible and thermally stable actuation of multiple valves with unprecedented ease and robustness. These ID valves are configured from an elastic epoxy diaphragm embedded on a 3D printed push-and-twist valve, which can be easily actuated by a simple automatic driver unit. As a proof of concept experiment, an enzyme-linked immunosorbent assay (ELISA) and a polymerase chain reaction (PCR) were performed on a disc in a fully automated manner to demonstrate the robust, reversible, leak-free, and thermally stable actuation of the valves.
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Affiliation(s)
- Tae-Hyeong Kim
- Center for Soft and Living Matter, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
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