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Sengupta S, Shyamala D, Kannan S, Fidal Kumar VT, Bhattacharya E. Microfabricated free standing, tuneable, porous microfilters from an epoxy based photoresist for effective bioseparation. Biointerphases 2024; 19:011004. [PMID: 38407470 DOI: 10.1116/6.0003165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 01/24/2024] [Indexed: 02/27/2024] Open
Abstract
SU-8 is an epoxy-based, biocompatible thermosetting polymer, which has been utilized mainly to fabricate biomedical devices and scaffolds. In this study, thin, single-layered, freestanding tuneable porous SU-8 membranes were microfabricated and surface hydrophilized for efficient bioseparation. Unlike the previous thicker membranes of 200-300 μm, these thin SU-8 membranes of 50-60 μm thickness and pores with 6-10 μm diameter were fabricated and tested for blood-plasma separation, without any additional support structure. The method is based on making a patterned SU-8 layer by electrospin coating and UV lithography on a sacrificial polyethylene terephthalate (PET) sheet attached to a silicon wafer. Poor adhesion between PET and SU-8 aid in the convenient release of the thin porous membranes with uniform pore formation. The single-layered self-supporting membranes were strong, safe, sterilizable, reusable, and suitable for plasma separation and postfermentation broth enrichment.
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Affiliation(s)
- Sudeshna Sengupta
- Centre for NEMS and Nanophotonics, Indian Institute of Technology-Madras, Chennai 600036, India
| | - D Shyamala
- Centre for NEMS and Nanophotonics, Indian Institute of Technology-Madras, Chennai 600036, India
| | - Sivasundari Kannan
- Centre for NEMS and Nanophotonics, Indian Institute of Technology-Madras, Chennai 600036, India
| | - V T Fidal Kumar
- Centre for NEMS and Nanophotonics, Indian Institute of Technology-Madras, Chennai 600036, India
| | - Enakshi Bhattacharya
- Centre for NEMS and Nanophotonics, Indian Institute of Technology-Madras, Chennai 600036, India
- Department of Electrical Engineering, Indian Institute of Technology-Madras, Chennai 600036, India
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2
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Salem SE, Abd El-Ghany AM, Elsheikh HA, Abdel-Ghany EM, Ras R. Prevalence of Cryptosporidium spp. infection in a working horse population in Egypt. Trop Anim Health Prod 2023; 55:361. [PMID: 37851181 PMCID: PMC10584700 DOI: 10.1007/s11250-023-03773-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Accepted: 09/12/2023] [Indexed: 10/19/2023]
Abstract
Working horses support the livelihoods of smallholder farmers in Egypt. No previous study has investigated the prevalence of cryptosporidiosis in working horses in Egypt. Faecal samples were collected from 607 working horses recruited from thirty-seven villages/areas in two Egyptian governorates and examined for Cryptosporidium spp. infection using the modified Zielh-Neelsen staining technique. Data on signalment, history of recent diarrhoea, and strongyle burden were collected. The prevalence of Cryptosporidium spp. infection was calculated using a bootstrap method and potential risk factors for infection were investigated using mixed-effects logistic regression models that included sampling location as a random-effects variable. The prevalence of Cryptosporidium spp. infection was 28.7% (95% confidence interval = 23.5-33.9). None of the variables investigated, which include age, sex of the animals, and strongyle burden, were associated with risk of infection. This study provided evidence-based information on the prevalence of Cryptosporidium spp. infection in the study area. However, the potential zoonotic risk of Cryptosporidium cannot be confirmed until further studies are conducted to genotype these parasites.
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Affiliation(s)
- Shebl E Salem
- Department of Surgery, Faculty of Veterinary Medicine, Zagazig University, Zagazig, 44519, Egypt.
| | - Amany M Abd El-Ghany
- Department of Parasitology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, 44519, Egypt
| | - Hussein A Elsheikh
- The Veterinary Clinic, Faculty of Veterinary Medicine, Zagazig University, Zagazig, 44519, Egypt
| | - Enas M Abdel-Ghany
- Genetic and Cytology Department, Biotechnology Research Institute, National Research Centre, Giza, Egypt
| | - Refaat Ras
- Department of Parasitology, Faculty of Veterinary Medicine, Zagazig University, Zagazig, 44519, Egypt
- Department of Microbiology and Parasitology, Faculty of Veterinary Medicine, Badr University in Cairo (BUC), Badr City, Cairo, Egypt
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3
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Syed MS, Mirakhorli F, Marquis C, Taylor RA, Warkiani ME. Particle movement and fluid behavior visualization using an optically transparent 3D-printed micro-hydrocyclone. BIOMICROFLUIDICS 2020; 14:064106. [PMID: 33269035 PMCID: PMC7679180 DOI: 10.1063/5.0025391] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 11/04/2020] [Indexed: 05/03/2023]
Abstract
A hydrocyclone is a macroscale separation device employed in various industries, with many advantages, including high-throughput and low operational costs. Translating these advantages to microscale has been a challenge due to the microscale fabrication limitations that can be surmounted using 3D printing technology. Additionally, it is difficult to simulate the performance of real 3D-printed micro-hydrocyclones because of turbulent eddies and the deviations from the design due to printing resolution. To address these issues, we propose a new experimental method for the direct observation of particle motion in 3D printed micro-hydrocyclones. To do so, wax 3D printing and soft lithography were used in combination to construct a transparent micro-hydrocyclone in a single block of polydimethylsiloxane. A high-speed camera and fluorescent particles were employed to obtain clear in situ images and to confirm the presence of the vortex core. To showcase the use of this method, we demonstrate that a well-designed device can achieve a 95% separation efficiency for a sample containing a mixture of (desired) stem cells and (undesired) microcarriers. Overall, we hope that the proposed method for the direct visualization of particle trajectories in micro-hydrocyclones will serve as a tool, which can be leveraged to accelerate the development of micro-hydrocyclones for biomedical applications.
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Affiliation(s)
- Maira Shakeel Syed
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Fateme Mirakhorli
- School of Biomedical Engineering, University of Technology Sydney, NSW 2007, Australia
| | - Christopher Marquis
- School of Biotechnology and Biomolecular Science, University of New South Wales, Sydney, NSW 2052, Australia
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Razavi Bazaz S, Rouhi O, Raoufi MA, Ejeian F, Asadnia M, Jin D, Ebrahimi Warkiani M. 3D Printing of Inertial Microfluidic Devices. Sci Rep 2020; 10:5929. [PMID: 32246111 PMCID: PMC7125121 DOI: 10.1038/s41598-020-62569-9] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Accepted: 03/11/2020] [Indexed: 12/27/2022] Open
Abstract
Inertial microfluidics has been broadly investigated, resulting in the development of various applications, mainly for particle or cell separation. Lateral migrations of these particles within a microchannel strictly depend on the channel design and its cross-section. Nonetheless, the fabrication of these microchannels is a continuous challenging issue for the microfluidic community, where the most studied channel cross-sections are limited to only rectangular and more recently trapezoidal microchannels. As a result, a huge amount of potential remains intact for other geometries with cross-sections difficult to fabricate with standard microfabrication techniques. In this study, by leveraging on benefits of additive manufacturing, we have proposed a new method for the fabrication of inertial microfluidic devices. In our proposed workflow, parts are first printed via a high-resolution DLP/SLA 3D printer and then bonded to a transparent PMMA sheet using a double-coated pressure-sensitive adhesive tape. Using this method, we have fabricated and tested a plethora of existing inertial microfluidic devices, whether in a single or multiplexed manner, such as straight, spiral, serpentine, curvilinear, and contraction-expansion arrays. Our characterizations using both particles and cells revealed that the produced chips could withstand a pressure up to 150 psi with minimum interference of the tape to the total functionality of the device and viability of cells. As a showcase of the versatility of our method, we have proposed a new spiral microchannel with right-angled triangular cross-section which is technically impossible to fabricate using the standard lithography. We are of the opinion that the method proposed in this study will open the door for more complex geometries with the bespoke passive internal flow. Furthermore, the proposed fabrication workflow can be adopted at the production level, enabling large-scale manufacturing of inertial microfluidic devices.
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Affiliation(s)
- Sajad Razavi Bazaz
- School of Biomedical Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
- Institute for Biomedical Materials & Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Omid Rouhi
- School of Biomedical Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Mohammad Amin Raoufi
- School of Biomedical Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
- School of Engineering, Macquarie University, Sydney, NSW, 2109, Australia
| | - Fatemeh Ejeian
- School of Biomedical Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia
| | - Mohsen Asadnia
- School of Engineering, Macquarie University, Sydney, NSW, 2109, Australia
| | - Dayong Jin
- Institute for Biomedical Materials & Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia
- SUStech-UTS joint Research Centre for Biomedical Materials & Devices, Southern University of Science and Technology, Shenzhen, 518055, P.R. China
| | - Majid Ebrahimi Warkiani
- School of Biomedical Engineering, University of Technology Sydney, Sydney, NSW, 2007, Australia.
- Institute for Biomedical Materials & Devices (IBMD), Faculty of Science, University of Technology Sydney, Sydney, NSW, 2007, Australia.
- SUStech-UTS joint Research Centre for Biomedical Materials & Devices, Southern University of Science and Technology, Shenzhen, 518055, P.R. China.
- Institute of Molecular Medicine, Sechenov University, Moscow, 119991, Russia.
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5
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Song K, Li G, Zu X, Du Z, Liu L, Hu Z. The Fabrication and Application Mechanism of Microfluidic Systems for High Throughput Biomedical Screening: A Review. MICROMACHINES 2020; 11:E297. [PMID: 32168977 PMCID: PMC7143183 DOI: 10.3390/mi11030297] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 03/01/2020] [Accepted: 03/10/2020] [Indexed: 01/15/2023]
Abstract
Microfluidic systems have been widely explored based on microfluidic technology, and it has been widely used for biomedical screening. The key parts are the fabrication of the base scaffold, the construction of the matrix environment in the 3D system, and the application mechanism. In recent years, a variety of new materials have emerged, meanwhile, some new technologies have been developed. In this review, we highlight the properties of high throughput and the biomedical application of the microfluidic chip and focus on the recent progress of the fabrication and application mechanism. The emergence of various biocompatible materials has provided more available raw materials for microfluidic chips. The material is not confined to polydimethylsiloxane (PDMS) and the extracellular microenvironment is not limited by a natural matrix. The mechanism is also developed in diverse ways, including its special physical structure and external field effects, such as dielectrophoresis, magnetophoresis, and acoustophoresis. Furthermore, the cell/organ-based microfluidic system provides a new platform for drug screening due to imitating the anatomic and physiologic properties in vivo. Although microfluidic technology is currently mostly in the laboratory stage, it has great potential for commercial applications in the future.
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Affiliation(s)
- Kena Song
- College of Medical Technology and Engineering, Henan University of Science and Technology, He’nan 471023, China; (K.S.); (X.Z.); (Z.D.)
| | - Guoqiang Li
- College of Physics, Chongqing University, Chongqing 401331, China; (G.L.); (L.L.)
| | - Xiangyang Zu
- College of Medical Technology and Engineering, Henan University of Science and Technology, He’nan 471023, China; (K.S.); (X.Z.); (Z.D.)
| | - Zhe Du
- College of Medical Technology and Engineering, Henan University of Science and Technology, He’nan 471023, China; (K.S.); (X.Z.); (Z.D.)
| | - Liyu Liu
- College of Physics, Chongqing University, Chongqing 401331, China; (G.L.); (L.L.)
| | - Zhigang Hu
- College of Medical Technology and Engineering, Henan University of Science and Technology, He’nan 471023, China; (K.S.); (X.Z.); (Z.D.)
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6
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Balyan P, Saini D, Das S, Kumar D, Agarwal A. Flow induced particle separation and collection through linear array pillar microfluidics device. BIOMICROFLUIDICS 2020; 14:024103. [PMID: 32206158 PMCID: PMC7082176 DOI: 10.1063/1.5143656] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 01/31/2020] [Indexed: 05/11/2023]
Abstract
Particle filtration and concentration have great significance in a multitude of applications. Physical filters are nearly indispensable in conventional separation processes. Similarly, microfabrication-based physical filters are gaining popularity as size-based particle sorters, separators, and prefiltration structures for microfluidics platforms. The work presented here introduces a linear combination of obstructions to provide size contrast-based particle separation. Polystyrene particles that are captured along the crossflow filters are packed in the direction of the dead-end filters. Separation of polydisperse suspension of 5 μm and 10 μm diameter polystyrene microspheres is attained with capture efficiency for larger particles as 95%. Blood suspension is used for biocharacterization of the device. A flow induced method is used to improve particle capture uniformity in a single microchannel and reduce microgap clogging to about 30%. This concept is extended to obtain semiquantification obtained by comparison of the initial particle concentration to captured-particle occupancy in a microfiltration channel.
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Affiliation(s)
- Prerna Balyan
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Electronics Engineering Research Institute (CSIR-CEERI) Campus, Pilani Rajasthan 333031, India
- Author to whom correspondence should be addressed:
| | - Deepika Saini
- CSIR-Central Electronics and Engineering Research Institute (CSIR-CEERI) Campus, Pilani Rajasthan 333031, India
| | - Supriyo Das
- CSIR-Central Electronics and Engineering Research Institute (CSIR-CEERI) Campus, Pilani Rajasthan 333031, India
| | - Dhirendra Kumar
- CSIR-Central Electronics and Engineering Research Institute (CSIR-CEERI) Campus, Pilani Rajasthan 333031, India
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7
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Sierra J, Marrugo-Ramírez J, Rodriguez-Trujillo R, Mir M, Samitier J. Sensor-Integrated Microfluidic Approaches for Liquid Biopsies Applications in Early Detection of Cancer. SENSORS (BASEL, SWITZERLAND) 2020; 20:E1317. [PMID: 32121271 PMCID: PMC7085501 DOI: 10.3390/s20051317] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2020] [Revised: 02/21/2020] [Accepted: 02/24/2020] [Indexed: 12/13/2022]
Abstract
Cancer represents one of the conditions with the most causes of death worldwide. Common methods for its diagnosis are based on tissue biopsies-the extraction of tissue from the primary tumor, which is used for its histological analysis. However, this technique represents a risk for the patient, along with being expensive and time-consuming and so it cannot be frequently used to follow the progress of the disease. Liquid biopsy is a new cancer diagnostic alternative, which allows the analysis of the molecular information of the solid tumors via a body fluid draw. This fluid-based diagnostic method displays relevant advantages, including its minimal invasiveness, lower risk, use as often as required, it can be analyzed with the use of microfluidic-based platforms with low consumption of reagent, and it does not require specialized personnel and expensive equipment for the diagnosis. In recent years, the integration of sensors in microfluidics lab-on-a-chip devices was performed for liquid biopsies applications, granting significant advantages in the separation and detection of circulating tumor nucleic acids (ctNAs), circulating tumor cells (CTCs) and exosomes. The improvements in isolation and detection technologies offer increasingly sensitive and selective equipment's, and the integration in microfluidic devices provides a better characterization and analysis of these biomarkers. These fully integrated systems will facilitate the generation of fully automatized platforms at low-cost for compact cancer diagnosis systems at an early stage and for the prediction and prognosis of cancer treatment through the biomarkers for personalized tumor analysis.
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Affiliation(s)
- Jessica Sierra
- Nanobioengineering Group, Institute for Bioengineering of Catalonia (IBEC) Barcelona Institute of Science and Technology (BIST), 12 Baldiri Reixac 15-21, 08028 Barcelona, Spain; (J.S.); (R.R.-T.); (J.S.)
- Department of Electronics and Biomedical Engineering, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain;
| | - José Marrugo-Ramírez
- Department of Electronics and Biomedical Engineering, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain;
| | - Romen Rodriguez-Trujillo
- Nanobioengineering Group, Institute for Bioengineering of Catalonia (IBEC) Barcelona Institute of Science and Technology (BIST), 12 Baldiri Reixac 15-21, 08028 Barcelona, Spain; (J.S.); (R.R.-T.); (J.S.)
- Department of Electronics and Biomedical Engineering, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain;
| | - Mònica Mir
- Nanobioengineering Group, Institute for Bioengineering of Catalonia (IBEC) Barcelona Institute of Science and Technology (BIST), 12 Baldiri Reixac 15-21, 08028 Barcelona, Spain; (J.S.); (R.R.-T.); (J.S.)
- Department of Electronics and Biomedical Engineering, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain;
- Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Monforte de Lemos 3-5, Pabellón 11, 28029 Madrid, Spain
| | - Josep Samitier
- Nanobioengineering Group, Institute for Bioengineering of Catalonia (IBEC) Barcelona Institute of Science and Technology (BIST), 12 Baldiri Reixac 15-21, 08028 Barcelona, Spain; (J.S.); (R.R.-T.); (J.S.)
- Department of Electronics and Biomedical Engineering, University of Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain;
- Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Monforte de Lemos 3-5, Pabellón 11, 28029 Madrid, Spain
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8
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Kulasinghe A, Wu H, Punyadeera C, Warkiani ME. The Use of Microfluidic Technology for Cancer Applications and Liquid Biopsy. MICROMACHINES 2018; 9:E397. [PMID: 30424330 PMCID: PMC6187606 DOI: 10.3390/mi9080397] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 08/03/2018] [Accepted: 08/07/2018] [Indexed: 12/11/2022]
Abstract
There is growing awareness for the need of early diagnostic tools to aid in point-of-care testing in cancer. Tumor biopsy remains the conventional means in which to sample a tumor and often presents with challenges and associated risks. Therefore, alternative sources of tumor biomarkers is needed. Liquid biopsy has gained attention due to its non-invasive sampling of tumor tissue and ability to serially assess disease via a simple blood draw over the course of treatment. Among the leading technologies developing liquid biopsy solutions, microfluidics has recently come to the fore. Microfluidic platforms offer cellular separation and analysis platforms that allow for high throughout, high sensitivity and specificity, low sample volumes and reagent costs and precise liquid controlling capabilities. These characteristics make microfluidic technology a promising tool in separating and analyzing circulating tumor biomarkers for diagnosis, prognosis and monitoring. In this review, the characteristics of three kinds of circulating tumor markers will be described in the context of cancer, circulating tumor cells (CTCs), exosomes, and circulating tumor DNA (ctDNA). The review will focus on how the introduction of microfluidic technologies has improved the separation and analysis of these circulating tumor markers.
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Affiliation(s)
- Arutha Kulasinghe
- The School of Biomedical Sciences, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD 4059, Australia.
| | - Hanjie Wu
- The School of Biomedical Engineering, Faculty of Engineering and Internet Technology, University of Technology Sydney, Ultimo, NSW 2007, Australia.
| | - Chamindie Punyadeera
- The School of Biomedical Sciences, Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD 4059, Australia.
| | - Majid Ebrahimi Warkiani
- The School of Biomedical Engineering, Faculty of Engineering and Internet Technology, University of Technology Sydney, Ultimo, NSW 2007, Australia.
- Institute of Molecular Medicine, Sechenov First Moscow State University, Moscow 119991, Russia.
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9
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Size-based separation methods of circulating tumor cells. Adv Drug Deliv Rev 2018; 125:3-20. [PMID: 29326054 DOI: 10.1016/j.addr.2018.01.002] [Citation(s) in RCA: 120] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 10/19/2017] [Accepted: 01/05/2018] [Indexed: 02/07/2023]
Abstract
Circulating tumor cells (CTCs) originate from the primary tumor mass and enter into the peripheral bloodstream. Compared to other "liquid biopsy" portfolios such as exosome, circulating tumor DNA/RNA (ctDNA/RNA), CTCs have incomparable advantages in analyses of transcriptomics, proteomics, and signal colocalization. Hence, CTCs hold the key to understanding the biology of metastasis and play a vital role in cancer diagnosis, treatment monitoring, and prognosis. Size-based enrichment features are prominent in CTC isolation. It is a label-free, simple and fast method. Enriched CTCs remain unmodified and viable for a wide range of subsequent analyses. In this review, we comprehensively summarize the differences of size and deformability between CTCs and blood cells, which would facilitate the development of technologies of size-based CTC isolation. Then we review representative size-/deformability-based technologies available for CTC isolation and highlight the recent achievements in molecular analysis of isolated CTCs. To wrap up, we discuss the substantial challenges facing the field, and elaborate on prospects.
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10
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Warkiani ME, Wu L, Tay AKP, Han J. Large-Volume Microfluidic Cell Sorting for Biomedical Applications. Annu Rev Biomed Eng 2015; 17:1-34. [DOI: 10.1146/annurev-bioeng-071114-040818] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Majid Ebrahimi Warkiani
- BioSystems and Micromechanics IRG, Singapore–MIT Alliance for Research and Technology (SMART) Centre, Singapore 138602;
- School of Mechanical and Manufacturing Engineering, Australian Centre for NanoMedicine, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Lidan Wu
- Department of Biological Engineering and
| | - Andy Kah Ping Tay
- BioSystems and Micromechanics IRG, Singapore–MIT Alliance for Research and Technology (SMART) Centre, Singapore 138602;
| | - Jongyoon Han
- BioSystems and Micromechanics IRG, Singapore–MIT Alliance for Research and Technology (SMART) Centre, Singapore 138602;
- Department of Biological Engineering and
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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11
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Shemesh J, Jalilian I, Shi A, Heng Yeoh G, Knothe Tate ML, Ebrahimi Warkiani M. Flow-induced stress on adherent cells in microfluidic devices. LAB ON A CHIP 2015; 15:4114-27. [PMID: 26334370 DOI: 10.1039/c5lc00633c] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Transduction of mechanical forces and chemical signals affect every cell in the human body. Fluid flow in systems such as the lymphatic or circulatory systems modulates not only cell morphology, but also gene expression patterns, extracellular matrix protein secretion and cell-cell and cell-matrix adhesions. Similar to the role of mechanical forces in adaptation of tissues, shear fluid flow orchestrates collective behaviours of adherent cells found at the interface between tissues and their fluidic environments. These behaviours range from alignment of endothelial cells in the direction of flow to stem cell lineage commitment. Therefore, it is important to characterize quantitatively fluid interface-dependent cell activity. Common macro-scale techniques, such as the parallel plate flow chamber and vertical-step flow methods that apply fluid-induced stress on adherent cells, offer standardization, repeatability and ease of operation. However, in order to achieve improved control over a cell's microenvironment, additional microscale-based techniques are needed. The use of microfluidics for this has been recognized, but its true potential has emerged only recently with the advent of hybrid systems, offering increased throughput, multicellular interactions, substrate functionalization on 3D geometries, and simultaneous control over chemical and mechanical stimulation. In this review, we discuss recent advances in microfluidic flow systems for adherent cells and elaborate on their suitability to mimic physiologic micromechanical environments subjected to fluid flow. We describe device design considerations in light of ongoing discoveries in mechanobiology and point to future trends of this promising technology.
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Affiliation(s)
- Jonathan Shemesh
- School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
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12
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Tamai H, Maruo K, Ueno H, Terao K, Kotera H, Suzuki T. Development of low-fluorescence thick photoresist for high-aspect-ratio microstructure in bio-application. BIOMICROFLUIDICS 2015; 9:022405. [PMID: 25945132 PMCID: PMC4401797 DOI: 10.1063/1.4917511] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 03/30/2015] [Indexed: 05/23/2023]
Abstract
In this study, we propose and evaluate a novel low-auto-fluorescence photoresist (SJI photoresist) for bio-application, e.g., in gene analysis and cell assay. The spin-coated SJI photoresist has a wide thickness range of ten to several hundred micrometers, and photoresist microstructures with an aspect ratio of over 7 and micropatterns of less than 2 μm are successfully fabricated. The emission spectrum intensity of the SJI photoresist is found to be over 80% less than that of the widely used SU-8 photoresist. To evaluate the validity of using the proposed photoresist in bio-application for fluorescence observation, we demonstrate a chromosome extension device composed of the SJI photoresist. The normalized contrast ratio of the SJI photoresist exhibits a 50% improvement over that of the SU-8 photoresist; thus, the SJI photoresist is a versatile tool for bio-application.
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Affiliation(s)
- H Tamai
- Department of Intelligent Mechanical Systems Engineering, Kagawa University , 2217-20 Hayashi-cho, Takamatsu, Kagawa 761-0396, Japan
| | - K Maruo
- Central Research Center, Daicel Corporation , 1239 Shinzaike, Aboshi-ku, Himeji, Hyogo 671-1283, Japan
| | - H Ueno
- Department of Intelligent Mechanical Systems Engineering, Kagawa University , 2217-20 Hayashi-cho, Takamatsu, Kagawa 761-0396, Japan
| | - K Terao
- Department of Intelligent Mechanical Systems Engineering, Kagawa University , 2217-20 Hayashi-cho, Takamatsu, Kagawa 761-0396, Japan
| | - H Kotera
- Department of Microengineering, Kyoto University , Kyoto daigaku Katsura, Nishikyo-ku Kyoto 615-8540, Japan
| | - T Suzuki
- Department of Intelligent Mechanical Systems Engineering, Kagawa University , 2217-20 Hayashi-cho, Takamatsu, Kagawa 761-0396, Japan
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13
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Adams DL, Zhu P, Makarova OV, Martin SS, Charpentier M, Chumsri S, Li S, Amstutz P, Tang CM. The systematic study of circulating tumor cell isolation using lithographic microfilters. RSC Adv 2014; 9:4334-4342. [PMID: 25614802 DOI: 10.1039/c3ra46839a] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Circulating tumor cells (CTCs) disseminated into peripheral blood from a primary, or metastatic, tumor can be used for early detection, diagnosis and monitoring of solid malignancies. CTC isolation by size exclusion techniques have long interested researchers as a simple broad based approach, which is methodologically diverse for use in both genomic and protein detection platforms. Though a variety of these microfiltration systems are employed academically and commercially, the limited ability to easily alter microfilter designs has hindered the optimization for CTC capture. To overcome this problem, we studied a unique photo-definable material with a scalable and mass producible photolithographic fabrication method. We use this fabrication method to systematically study and optimize the parameters necessary for CTC isolation using a microfiltration approach, followed by a comparison to a "standard" filtration membrane. We demonstrate that properly designed microfilters can capture MCF-7 cancer cells at rate of 98 ± 2% if they consist of uniform patterned distributions, ≥160 000 pores, and 7 μm pore diameters.
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Affiliation(s)
- Daniel L Adams
- Creatv MicroTech, Inc., 9900 Belward Campus Drive, Suite 330, Rockville, MD 20850, USA
| | - Peixuan Zhu
- Creatv MicroTech, Inc., 9900 Belward Campus Drive, Suite 330, Rockville, MD 20850, USA
| | - Olga V Makarova
- Creatv MicroTech, Inc., 2242 W. Harrison Street, Suite 109B, Chicago, IL 60612-3515, USA
| | - Stuart S Martin
- University of Maryland Baltimore, Greenebaum Cancer Center, 655 W. Baltimore St Suite BRB 10-029, Baltimore, MD 21136, USA
| | - Monica Charpentier
- University of Maryland Baltimore, Greenebaum Cancer Center, 655 W. Baltimore St Suite BRB 10-029, Baltimore, MD 21136, USA
| | - Saranya Chumsri
- University of Maryland Baltimore, Greenebaum Cancer Center, 655 W. Baltimore St Suite BRB 10-029, Baltimore, MD 21136, USA
| | - Shuhong Li
- Creatv MicroTech, Inc., 9900 Belward Campus Drive, Suite 330, Rockville, MD 20850, USA
| | - Platte Amstutz
- Creatv MicroTech, Inc., 11609 Lake Potomac Drive, Potomac, MD 20854, USA
| | - Cha-Mei Tang
- Creatv MicroTech, Inc., 11609 Lake Potomac Drive, Potomac, MD 20854, USA
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14
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Warkiani ME, Khoo BL, Tan DSW, Bhagat AAS, Lim WT, Yap YS, Lee SC, Soo RA, Han J, Lim CT. An ultra-high-throughput spiral microfluidic biochip for the enrichment of circulating tumor cells. Analyst 2014; 139:3245-55. [DOI: 10.1039/c4an00355a] [Citation(s) in RCA: 150] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We demonstrate the high-throughput and high-resolution separation of rare circulating tumor cells (CTCs) from blood using a multiplexed spiral microfluidic device.
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Affiliation(s)
- Majid Ebrahimi Warkiani
- BioSystems and Micromechanics (BioSyM) IRG
- Singapore-MIT Alliance for Research and Technology (SMART) Centre
- Singapore
| | - Bee Luan Khoo
- Mechanobiology Institute
- National University of Singapore
- Singapore
- Department of Biomedical Engineering
- National University of Singapore
| | | | | | - Wan-Teck Lim
- Department of Medical Oncology
- National Cancer Centre Singapore
- Singapore
| | - Yoon Sim Yap
- Department of Medical Oncology
- National Cancer Centre Singapore
- Singapore
| | - Soo Chin Lee
- Department of Hematology-Oncology
- National University Hospital
- Singapore
| | - Ross A. Soo
- Department of Hematology-Oncology
- National University Hospital
- Singapore
| | - Jongyoon Han
- BioSystems and Micromechanics (BioSyM) IRG
- Singapore-MIT Alliance for Research and Technology (SMART) Centre
- Singapore
- Department of Electrical Engineering and Computer Science
- Department of Biological Engineering
| | - Chwee Teck Lim
- BioSystems and Micromechanics (BioSyM) IRG
- Singapore-MIT Alliance for Research and Technology (SMART) Centre
- Singapore
- Mechanobiology Institute
- National University of Singapore
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15
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Warkiani ME, Bhagat AAS, Khoo BL, Han J, Lim CT, Gong HQ, Fane AG. Isoporous micro/nanoengineered membranes. ACS NANO 2013; 7:1882-1904. [PMID: 23442009 DOI: 10.1021/nn305616k] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Isoporous membranes are versatile structures with numerous potential and realized applications in various fields of science such as micro/nanofiltration, cell separation and harvesting, controlled drug delivery, optics, gas separation, and chromatography. Recent advances in micro/nanofabrication techniques and material synthesis provide novel methods toward controlling the detailed microstructure of membrane materials, allowing fabrication of membranes with well-defined pore size and shape. This review summarizes the current state-of-the-art for isoporous membrane fabrication using different techniques, including microfabrication, anodization, and advanced material synthesis. Various applications of isoporous membranes, such as protein filtration, pathogen isolation, cell harvesting, biosensing, and drug delivery, are also presented.
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Affiliation(s)
- Majid Ebrahimi Warkiani
- BioSystems and Micromechanics (BioSyM) IRG, Singapore-MIT Alliance for Research and Technology (SMART) Centre, Singapore.
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