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Liu S, Wu W, Du Y, Yin H, Chen Q, Yu W, Wang W, Yu J, Liu L, Lou W, Pu N. The evolution and heterogeneity of neutrophils in cancers: origins, subsets, functions, orchestrations and clinical applications. Mol Cancer 2023; 22:148. [PMID: 37679744 PMCID: PMC10483725 DOI: 10.1186/s12943-023-01843-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 08/14/2023] [Indexed: 09/09/2023] Open
Abstract
Neutrophils, the most prevalent innate immune cells in humans, have garnered significant attention in recent years due to their involvement in cancer progression. This comprehensive review aimed to elucidate the important roles and underlying mechanisms of neutrophils in cancer from the perspective of their whole life cycle, tracking them from development in the bone marrow to circulation and finally to the tumor microenvironment (TME). Based on an understanding of their heterogeneity, we described the relationship between abnormal neutrophils and clinical manifestations in cancer. Specifically, we explored the function, origin, and polarization of neutrophils within the TME. Furthermore, we also undertook an extensive analysis of the intricate relationship between neutrophils and clinical management, including neutrophil-based clinical treatment strategies. In conclusion, we firmly assert that directing future research endeavors towards comprehending the remarkable heterogeneity exhibited by neutrophils is of paramount importance.
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Affiliation(s)
- Siyao Liu
- Department of Pancreatic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Wenchuan Wu
- Department of Pancreatic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Yueshan Du
- Department of Pancreatic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Hanlin Yin
- Department of Pancreatic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Qiangda Chen
- Department of Pancreatic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Weisheng Yu
- Department of Pancreatic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Wenquan Wang
- Department of Pancreatic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Jun Yu
- Departments of Medicine and Oncology, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, USA
| | - Liang Liu
- Department of Pancreatic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China.
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.
| | - Wenhui Lou
- Department of Pancreatic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China.
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.
| | - Ning Pu
- Department of Pancreatic Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China.
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.
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Guo Y, Wang H, Liu Z, Chang Z. Comprehensive analysis of the microbiome and metabolome in pus from pyogenic liver abscess patients with and without diabetes mellitus. Front Microbiol 2023; 14:1211835. [PMID: 37426007 PMCID: PMC10328747 DOI: 10.3389/fmicb.2023.1211835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 05/31/2023] [Indexed: 07/11/2023] Open
Abstract
Introduction Pyogenic liver abscess (PLA) patients combined with diabetes mellitus (DM) tend to have more severe clinical manifestations than without DM. The mechanism responsible for this phenomenon is not entirely clear. The current study therefore aimed to comprehensively analyze the microbiome composition and metabolome in pus from PLA patients with and without DM, to determine the potential reasons for these differences. Methods Clinical data from 290 PLA patients were collected retrospectively. We analyzed the pus microbiota using 16S rDNA sequencing in 62 PLA patients. In addition, the pus metabolomes of 38 pus samples were characterized by untargeted metabolomics analysis. Correlation analyses of microbiota, metabolites and laboratory findings were performed to identify significant associations. Results PLA patients with DM had more severe clinical manifestations than PLA patients without DM. There were 17 discriminating genera between the two groups at the genus level, among which Klebsiella was the most discriminating taxa. The ABC transporters was the most significant differential metabolic pathway predicted by PICRUSt2. Untargeted metabolomics analysis showed that concentrations of various metabolites were significantly different between the two groups and seven metabolites were enriched in the ABC transporters pathway. Phosphoric acid, taurine, and orthophosphate in the ABC transporters pathway were negatively correlated with the relative abundance of Klebsiella and the blood glucose level. Discussion The results showed that the relative abundance of Klebsiella in the pus cavity of PLA patients with DM was higher than those without DM, accompanied by changes of various metabolites and metabolic pathways, which may be associated with more severe clinical manifestations.
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Ellett F, Irimia D. Passive redirection filters minimize red blood cell contamination during neutrophil chemotaxis assays using whole blood. LAB ON A CHIP 2023; 23:1879-1885. [PMID: 36857665 DOI: 10.1039/d2lc00903j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Neutrophils are the most numerous white blood cells and are the first to arrive at sites of inflammation and infection. Thus, neutrophil behavior provides a comprehensive biomarker for antimicrobial defenses. Several microfluidic tools have been developed to test neutrophil chemotaxis, phagocytosis, extrusion of extracellular traps, etc. Traditional tools rely on purified neutrophil samples, which require lengthy and expensive isolation procedures from large volumes of blood. In the absence of such isolation, visualizing neutrophils in blood is complicated by the overwhelming number of red blood cells (RBCs), which outnumber neutrophils by 1000 : 1. Recently, several microfluidic technologies have been designed to analyze neutrophils directly in blood, by separating neutrophils on selectin coated surfaces before the migration assay or blocking the advance of RBCs with the moving neutrophils. However, RBC contamination remains an issue, albeit with a reduced ratio, down to 1 : 1. Here, we present an RBC-debulking strategy for neutrophil assays based on microscale passive redirection filters (PRFs) that reduce RBC contamination down to as few as a 1 : 17 RBC to neutrophil ratio. We compare the performance of different PRF designs and measure changes in neutrophil chemotaxis velocity and directionality following immune stimulation of whole blood.
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Affiliation(s)
- Felix Ellett
- BioMEMS Resource Center, Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Shriners Hospital for Children, Harvard Medical School, Boston, Massachusetts, USA.
| | - Daniel Irimia
- BioMEMS Resource Center, Center for Engineering in Medicine and Surgery, Massachusetts General Hospital, Shriners Hospital for Children, Harvard Medical School, Boston, Massachusetts, USA.
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Lu N, Tay HM, Petchakup C, He L, Gong L, Maw KK, Leong SY, Lok WW, Ong HB, Guo R, Li KHH, Hou HW. Label-free microfluidic cell sorting and detection for rapid blood analysis. LAB ON A CHIP 2023; 23:1226-1257. [PMID: 36655549 DOI: 10.1039/d2lc00904h] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Blood tests are considered as standard clinical procedures to screen for markers of diseases and health conditions. However, the complex cellular background (>99.9% RBCs) and biomolecular composition often pose significant technical challenges for accurate blood analysis. An emerging approach for point-of-care blood diagnostics is utilizing "label-free" microfluidic technologies that rely on intrinsic cell properties for blood fractionation and disease detection without any antibody binding. A growing body of clinical evidence has also reported that cellular dysfunction and their biophysical phenotypes are complementary to standard hematoanalyzer analysis (complete blood count) and can provide a more comprehensive health profiling. In this review, we will summarize recent advances in microfluidic label-free separation of different blood cell components including circulating tumor cells, leukocytes, platelets and nanoscale extracellular vesicles. Label-free single cell analysis of intrinsic cell morphology, spectrochemical properties, dielectric parameters and biophysical characteristics as novel blood-based biomarkers will also be presented. Next, we will highlight research efforts that combine label-free microfluidics with machine learning approaches to enhance detection sensitivity and specificity in clinical studies, as well as innovative microfluidic solutions which are capable of fully integrated and label-free blood cell sorting and analysis. Lastly, we will envisage the current challenges and future outlook of label-free microfluidics platforms for high throughput multi-dimensional blood cell analysis to identify non-traditional circulating biomarkers for clinical diagnostics.
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Affiliation(s)
- Nan Lu
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Blk N3, Level 2, Room 86 (N3-02c-86), 639798, Singapore.
- HP-NTU Digital Manufacturing Corporate Lab, Nanyang Technological University, 65 Nanyang Drive, Block N3, 637460, Singapore
| | - Hui Min Tay
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Blk N3, Level 2, Room 86 (N3-02c-86), 639798, Singapore.
| | - Chayakorn Petchakup
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Blk N3, Level 2, Room 86 (N3-02c-86), 639798, Singapore.
| | - Linwei He
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Blk N3, Level 2, Room 86 (N3-02c-86), 639798, Singapore.
| | - Lingyan Gong
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Blk N3, Level 2, Room 86 (N3-02c-86), 639798, Singapore.
| | - Kay Khine Maw
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Blk N3, Level 2, Room 86 (N3-02c-86), 639798, Singapore.
| | - Sheng Yuan Leong
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Blk N3, Level 2, Room 86 (N3-02c-86), 639798, Singapore.
| | - Wan Wei Lok
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Blk N3, Level 2, Room 86 (N3-02c-86), 639798, Singapore.
| | - Hong Boon Ong
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Blk N3, Level 2, Room 86 (N3-02c-86), 639798, Singapore.
| | - Ruya Guo
- Key Laboratory of Agricultural Information Acquisition Technology, Ministry of Agriculture and Rural Affairs, China Agricultural University, Beijing, 100083, China
| | - King Ho Holden Li
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Blk N3, Level 2, Room 86 (N3-02c-86), 639798, Singapore.
- HP-NTU Digital Manufacturing Corporate Lab, Nanyang Technological University, 65 Nanyang Drive, Block N3, 637460, Singapore
| | - Han Wei Hou
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Blk N3, Level 2, Room 86 (N3-02c-86), 639798, Singapore.
- HP-NTU Digital Manufacturing Corporate Lab, Nanyang Technological University, 65 Nanyang Drive, Block N3, 637460, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, 11 Mandalay Road, Clinical Sciences Building, 308232, Singapore
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Yang X, Gao C, Liu Y, Zhu L, Yang K. Simplified Cell Magnetic Isolation Assisted SC 2 Chip to Realize "Sample in and Chemotaxis Out": Validated by Healthy and T2DM Patients' Neutrophils. MICROMACHINES 2022; 13:1820. [PMID: 36363840 PMCID: PMC9692824 DOI: 10.3390/mi13111820] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 10/17/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
Neutrophil migration in tissues critically regulates the human immune response and can either play a protective role in host defense or cause health problems. Microfluidic chips are increasingly applied to study neutrophil migration, attributing to their advantages of low reagent consumption, stable chemical gradients, visualized cell chemotaxis monitoring, and quantification. Most chemotaxis chips suffered from low throughput and fussy cell separation operations. We here reported a novel and simple "sample in and chemotaxis out" method for rapid neutrophils isolation from a small amount of whole blood based on a simplified magnetic method, followed by a chemotaxis assay on a microfluidic chip (SC2 chip) consisting of six cell migration units and six-cell arrangement areas. The advantages of the "sample in and chemotaxis out" method included: less reagent consumption (10 μL of blood + 1 μL of magnetic beads + 1 μL of lysis buffer); less time (5 min of cell isolation + 15 min of chemotaxis testing); no ultracentrifugation; more convenient; higher efficiency; high throughput. We have successfully validated the approach by measuring neutrophil chemotaxis to frequently-used chemoattractant (i.e., fMLP). The effects of D-glucose and mannitol on neutrophil chemotaxis were also analyzed. In addition, we demonstrated the effectiveness of this approach for testing clinical samples from diabetes mellitus type 2 (T2DM) patients. We found neutrophils' migration speed was higher in the "well-control" T2DM than in the "poor-control" group. Pearson coefficient analysis further showed that the migration speed of T2DM was negatively correlated with physiological indicators, such as HbA1c (-0.44), triglyceride (-0.36), C-reactive protein (-0.28), and total cholesterol (-0.28). We are very confident that the developed "sample in and chemotaxis out" method was hoped to be an attractive model for analyzing the chemotaxis of healthy and disease-associated neutrophils.
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Affiliation(s)
- Xiao Yang
- Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- School of Biomedical Engineering, Anhui Medical University, Hefei 230032, China
| | - Chaoru Gao
- Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
- School of Biomedical Engineering, Anhui Medical University, Hefei 230032, China
| | - Yong Liu
- Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Ling Zhu
- Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
| | - Ke Yang
- Anhui Institute of Optics and Fine Mechanics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
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Petchakup C, Yang H, Gong L, He L, Tay HM, Dalan R, Chung AJ, Li KHH, Hou HW. Microfluidic Impedance-Deformability Cytometry for Label-Free Single Neutrophil Mechanophenotyping. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2104822. [PMID: 35253966 DOI: 10.1002/smll.202104822] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 01/03/2022] [Indexed: 06/14/2023]
Abstract
The intrinsic biophysical states of neutrophils are associated with immune dysfunctions in diseases. While advanced image-based biophysical flow cytometers can probe cell deformability at high throughput, it is nontrivial to couple different sensing modalities (e.g., electrical) to measure other critical cell attributes including cell viability and membrane integrity. Herein, an "optics-free" impedance-deformability cytometer for multiparametric single cell mechanophenotyping is reported. The microfluidic platform integrates hydrodynamic cell pinching, and multifrequency impedance quantification of cell size, deformability, and membrane impedance (indicative of cell viability and activation). A newly-defined "electrical deformability index" is validated by numerical simulations, and shows strong correlations with the optical cell deformability index of HL-60 experimentally. Human neutrophils treated with various biochemical stimul are further profiled, and distinct differences in multimodal impedance signatures and UMAP analysis are observed. Overall, the integrated cytometer enables label-free cell profiling at throughput of >1000 cells min-1 without any antibodies labeling to facilitate clinical diagnostics.
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Affiliation(s)
- Chayakorn Petchakup
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Haoning Yang
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Lingyan Gong
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Linwei He
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Hui Min Tay
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Rinkoo Dalan
- Endocrinology Department, Tan Tock Seng Hospital, 11 Jln Tan Tock Seng Road, Singapore, 308433, Singapore
| | - Aram J Chung
- School of Biomedical Engineering, Korea University, Seoul, 02841, Republic of Korea
- Interdisciplinary Program in Precision Public Health, Korea University, Seoul, 02841, Republic of Korea
| | - King Ho Holden Li
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Han Wei Hou
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, 11 Mandalay Road, Clinical Sciences Building Level 11, Singapore, 308232, Singapore
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Sakuma M, Wang X, Ellett F, Edd JF, Babatunde KA, Viens A, Mansour MK, Irimia D. Microfluidic capture of chromatin fibres measures neutrophil extracellular traps (NETs) released in a drop of human blood. LAB ON A CHIP 2022; 22:936-944. [PMID: 35084421 PMCID: PMC8978531 DOI: 10.1039/d1lc01123e] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Neutrophils are the largest population of white blood cells in the circulation, and their primary function is to protect the body from microbes. They can release the chromatin in their nucleus, forming characteristic web structures and trap microbes, contributing to antimicrobial defenses. The chromatin webs are known as neutrophil extracellular traps (NETs). Importantly, neutrophils can also release NETs in pathological conditions related to rheumatic diseases, atherosclerosis, cancer, and sepsis. Thus, determining the concentration of NETs in the blood is increasingly important for monitoring patients, evaluating treatment efficacy, and understanding the pathology of various diseases. However, traditional methods for measuring NETs require separating cells and plasma from blood, are prone to sample preparation artifacts, and cannot distinguish between intact and degraded NETs. Here, we design a microfluidic analytical tool that captures NETs mechanically from a drop of blood and measures the amount of intact NETs unbiased by the presence of degraded NETs in the sample.
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Affiliation(s)
- Miyuki Sakuma
- BioMEMS Resource Center, Center for Engineering in Medicine and Surgery, Department of Surgery, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA.
- Shriners Hospitals for Children, Boston, MA, USA
| | - Xiao Wang
- BioMEMS Resource Center, Center for Engineering in Medicine and Surgery, Department of Surgery, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA.
- Shriners Hospitals for Children, Boston, MA, USA
| | - Felix Ellett
- BioMEMS Resource Center, Center for Engineering in Medicine and Surgery, Department of Surgery, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA.
- Shriners Hospitals for Children, Boston, MA, USA
| | - Jon F Edd
- BioMEMS Resource Center, Center for Engineering in Medicine and Surgery, Department of Surgery, Massachusetts General Hospital, Boston, MA, USA
- Cancer Center, Massachusetts General Hospital, Boston, MA, USA
| | - Kehinde Adebayo Babatunde
- BioMEMS Resource Center, Center for Engineering in Medicine and Surgery, Department of Surgery, Massachusetts General Hospital, Boston, MA, USA
- Department of Medicine, University of Fribourg, 1700, Fribourg, Switzerland
| | - Adam Viens
- Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Michael K Mansour
- Harvard Medical School, Boston, MA, USA.
- Division of Infectious Diseases, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Daniel Irimia
- BioMEMS Resource Center, Center for Engineering in Medicine and Surgery, Department of Surgery, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA.
- Shriners Hospitals for Children, Boston, MA, USA
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Babatunde KA, Ayuso JM, Kerr SC, Huttenlocher A, Beebe DJ. Microfluidic Systems to Study Neutrophil Forward and Reverse Migration. Front Immunol 2021; 12:781535. [PMID: 34899746 PMCID: PMC8653704 DOI: 10.3389/fimmu.2021.781535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 11/09/2021] [Indexed: 12/26/2022] Open
Abstract
During infection, neutrophils are the most abundantly recruited innate immune cells at sites of infection, playing critical roles in the elimination of local infection and healing of the injury. Neutrophils are considered to be short-lived effector cells that undergo cell death at infection sites and in damaged tissues. However, recent in vitro and in vivo evidence suggests that neutrophil behavior is more complex and that they can migrate away from the inflammatory site back into the vasculature following the resolution of inflammation. Microfluidic devices have contributed to an improved understanding of the interaction and behavior of neutrophils ex vivo in 2D and 3D microenvironments. The role of reverse migration and its contribution to the resolution of inflammation remains unclear. In this review, we will provide a summary of the current applications of microfluidic devices to investigate neutrophil behavior and interactions with other immune cells with a focus on forward and reverse migration in neutrophils.
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Affiliation(s)
| | - Jose M Ayuso
- Department of Pathology & Laboratory Medicine, University of Wisconsin, Madison, WI, United States
| | - Sheena C Kerr
- Department of Pathology & Laboratory Medicine, University of Wisconsin, Madison, WI, United States.,Carbone Cancer Center, University of Wisconsin, Madison, WI, United States
| | - Anna Huttenlocher
- Departments of Pediatrics and Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI, United States
| | - David J Beebe
- Department of Pathology & Laboratory Medicine, University of Wisconsin, Madison, WI, United States.,Carbone Cancer Center, University of Wisconsin, Madison, WI, United States.,Department of Biomedical Engineering, University of Wisconsin, Madison, WI, United States
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Richardson IM, Calo CJ, Hind LE. Microphysiological Systems for Studying Cellular Crosstalk During the Neutrophil Response to Infection. Front Immunol 2021; 12:661537. [PMID: 33986752 PMCID: PMC8111168 DOI: 10.3389/fimmu.2021.661537] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Accepted: 04/09/2021] [Indexed: 12/13/2022] Open
Abstract
Neutrophils are the primary responders to infection, rapidly migrating to sites of inflammation and clearing pathogens through a variety of antimicrobial functions. This response is controlled by a complex network of signals produced by vascular cells, tissue resident cells, other immune cells, and the pathogen itself. Despite significant efforts to understand how these signals are integrated into the neutrophil response, we still do not have a complete picture of the mechanisms regulating this process. This is in part due to the inherent disadvantages of the most-used experimental systems: in vitro systems lack the complexity of the tissue microenvironment and animal models do not accurately capture the human immune response. Advanced microfluidic devices incorporating relevant tissue architectures, cell-cell interactions, and live pathogen sources have been developed to overcome these challenges. In this review, we will discuss the in vitro models currently being used to study the neutrophil response to infection, specifically in the context of cell-cell interactions, and provide an overview of their findings. We will also provide recommendations for the future direction of the field and what important aspects of the infectious microenvironment are missing from the current models.
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Affiliation(s)
| | | | - Laurel E. Hind
- Department of Chemical and Biological Engineering, University of Colorado – Boulder, Boulder, CO, United States
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Kalyan S, Torabi C, Khoo H, Sung HW, Choi SE, Wang W, Treutler B, Kim D, Hur SC. Inertial Microfluidics Enabling Clinical Research. MICROMACHINES 2021; 12:257. [PMID: 33802356 PMCID: PMC7999476 DOI: 10.3390/mi12030257] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/20/2021] [Accepted: 03/01/2021] [Indexed: 02/06/2023]
Abstract
Fast and accurate interrogation of complex samples containing diseased cells or pathogens is important to make informed decisions on clinical and public health issues. Inertial microfluidics has been increasingly employed for such investigations to isolate target bioparticles from liquid samples with size and/or deformability-based manipulation. This phenomenon is especially useful for the clinic, owing to its rapid, label-free nature of target enrichment that enables further downstream assays. Inertial microfluidics leverages the principle of inertial focusing, which relies on the balance of inertial and viscous forces on particles to align them into size-dependent laminar streamlines. Several distinct microfluidic channel geometries (e.g., straight, curved, spiral, contraction-expansion array) have been optimized to achieve inertial focusing for a variety of purposes, including particle purification and enrichment, solution exchange, and particle alignment for on-chip assays. In this review, we will discuss how inertial microfluidics technology has contributed to improving accuracy of various assays to provide clinically relevant information. This comprehensive review expands upon studies examining both endogenous and exogenous targets from real-world samples, highlights notable hybrid devices with dual functions, and comments on the evolving outlook of the field.
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Affiliation(s)
- Srivathsan Kalyan
- Department of Mechanical Engineering, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218, USA; (S.K.); (C.T.); (H.K.); (S.-E.C.)
| | - Corinna Torabi
- Department of Mechanical Engineering, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218, USA; (S.K.); (C.T.); (H.K.); (S.-E.C.)
| | - Harrison Khoo
- Department of Mechanical Engineering, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218, USA; (S.K.); (C.T.); (H.K.); (S.-E.C.)
| | - Hyun Woo Sung
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218, USA;
| | - Sung-Eun Choi
- Department of Mechanical Engineering, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218, USA; (S.K.); (C.T.); (H.K.); (S.-E.C.)
| | - Wenzhao Wang
- Department of Biomedical Engineering, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218, USA; (W.W.); (B.T.)
| | - Benjamin Treutler
- Department of Biomedical Engineering, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218, USA; (W.W.); (B.T.)
| | - Dohyun Kim
- Department of Mechanical Engineering, Myongji University, Yongin-si 17508, Korea
| | - Soojung Claire Hur
- Department of Mechanical Engineering, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218, USA; (S.K.); (C.T.); (H.K.); (S.-E.C.)
- Institute for NanoBioTechnology, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218, USA
- Department of Oncology, Johns Hopkins University, 600 N Wolfe St, Baltimore, MD 21205, USA
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, 401 N Broadway, Baltimore, MD 21231, USA
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11
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Jeon JH, Hong CW, Kim EY, Lee JM. Current Understanding on the Metabolism of Neutrophils. Immune Netw 2020; 20:e46. [PMID: 33425431 PMCID: PMC7779868 DOI: 10.4110/in.2020.20.e46] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/13/2020] [Accepted: 12/13/2020] [Indexed: 02/07/2023] Open
Abstract
Neutrophils are innate immune cells that constitute the first line of defense against invading pathogens. Due to this characteristic, they are exposed to diverse immunological environments wherein sources for nutrients are often limited. Recent advances in the field of immunometabolism revealed that neutrophils utilize diverse metabolic pathways in response to immunological challenges. In particular, neutrophils adopt specific metabolic pathways for modulating their effector functions in contrast to other immune cells, which undergo metabolic reprogramming to ensure differentiation into distinct cell subtypes. Therefore, neutrophils utilize different metabolic pathways not only to fulfill their energy requirements, but also to support specialized effector functions, such as neutrophil extracellular trap formation, ROS generation, chemotaxis, and degranulation. In this review, we discuss the basic metabolic pathways used by neutrophils and how these metabolic alterations play a critical role in their effector functions.
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Affiliation(s)
- Jae-Han Jeon
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Daegu 41944, Korea.,Kyungpook National University Hospital, Bio-Medical Research Institute, Daegu 41940, Korea
| | - Chang-Won Hong
- Kyungpook National University Hospital, Bio-Medical Research Institute, Daegu 41940, Korea.,Department of Physiology, School of Medicine, Kyungpook National University, Daegu 41944, Korea
| | - Eun Young Kim
- Department of Biochemistry and Cell Biology, Cell and Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu 41944, Korea
| | - Jae Man Lee
- Department of Biochemistry and Cell Biology, Cell and Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu 41944, Korea
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12
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Menon NV, Su C, Pang KT, Phua ZJ, Tay HM, Dalan R, Wang X, Li KHH, Hou HW. Recapitulating atherogenic flow disturbances and vascular inflammation in a perfusable 3D stenosis model. Biofabrication 2020; 12:045009. [PMID: 32650321 DOI: 10.1088/1758-5090/aba501] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Blood vessel narrowing and arterial occlusion are pathological hallmarks of atherosclerosis, which involves a complex interplay of perturbed hemodynamics, endothelial dysfunction and inflammatory cascade. Herein, we report a novel circular microfluidic stenosis model that recapitulates atherogenic flow-mediated endothelial dysfunction and blood-endothelial cell (EC) interactions in vitro. 2D and 3D stenosis microchannels with different constriction geometries were fabricated using 3D printing to study flow disturbances under varying severity of occlusion and wall shear stresses (100 to 2000 dynecm-2). Experimental and fluid simulation results confirmed the presence of pathological shear stresses in the stenosis region, and recirculation flow post stenosis. The resultant pathological flow profile induced pro-inflammatory and pro-thrombotic EC state as demonstrated by orthogonal EC alignment, enhanced platelet adhesion at the stenosis, and aberrant leukocyte-EC interactions post stenosis. Clinical utility of the vascular model was further investigated by testing anti-thrombotic and immunomodulatory efficacy of aspirin and metformin, respectively. Overall, the platform enables multi-factorial analysis of critical atherogenic events including endothelial dysfunction, platelets and leukocyte adhesion, and can be further developed into a liquid biopsy tool for cardiovascular risk stratification.
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Affiliation(s)
- Nishanth Venugopal Menon
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798, Singapore. Equal contribution
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13
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Abstract
Neutrophil chemotaxis plays a vital role in human immune system. Compared with traditional cell migration assays, the emergence of microfluidics provides a new research platform of cell chemotaxis study due to the advantages of visualization, precise control of chemical gradient, and small consumption of reagents. A series of microfluidic devices have been fabricated to study the behavior of neutrophils exposed on controlled, stable, and complex profiles of chemical concentration gradients. In addition, microfluidic technology offers a promising way to integrate the other functions, such as cell culture, separation and analysis into a single chip. Therefore, an overview of recent developments in microfluidic-based neutrophil chemotaxis studies is presented. Meanwhile, the strength and drawbacks of these devices are compared.
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14
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Roushan M, Jorfi M, Mishra A, Wong KHK, Jorgensen J, Ell E, Markmann JF, Lee J, Irimia D. Trapped Chromatin Fibers Damage Flowing Red Blood Cells. ACTA ACUST UNITED AC 2019; 2. [PMID: 31223642 DOI: 10.1002/adbi.201800040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Neutrophils are the most abundant white blood cells in the circulation and serve antimicrobial functions. One of their antimicrobial mechanisms involves the release of neutrophil extracellular traps (NETs), long chromatin fibers decorated with antimicrobial granular proteins that contribute to the elimination of pathogens. However, the release of NETs has also been associated with disease processes. While recent research has focused on biochemical reactions catalyzed by NETs, significantly less is known about the mechanical effect of NETs in circulation. Here, microfluidic devices and biophysical models are employed to study the consequences of the interactions between NETs trapped in channels and red blood cells (RBCs) flowing in blood over the NETs. It has been found that the RBCs can be deformed and ruptured after interactions with NETs, generating RBC fragments. Significant increases in the number of RBC fragments have also been found in the circulation of patients with conditions in which NETs have been demonstrated to be present in circulation, including sepsis and kidney transplant. Further studies will probe the potential utility of RBC fragments in the diagnostic, monitoring, and treatment of diseases associated with the presence of NETs in circulation.
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Affiliation(s)
- Maedeh Roushan
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA,
| | - Mehdi Jorfi
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA,
| | - Avanish Mishra
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA,
| | - Keith H K Wong
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA,
| | - Julianne Jorgensen
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA,
| | - Eric Ell
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA,
| | - James F Markmann
- Division of Transplantation, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jarone Lee
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Daniel Irimia
- Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA,
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15
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Petchakup C, Tay HM, Li KHH, Hou HW. Integrated inertial-impedance cytometry for rapid label-free leukocyte isolation and profiling of neutrophil extracellular traps (NETs). LAB ON A CHIP 2019; 19:1736-1746. [PMID: 31020286 DOI: 10.1039/c9lc00250b] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Circulating leukocytes are indispensable components of the immune system, and rapid analysis of their native state or functionalities can help to unravel their pathophysiological roles and identify novel prognostic biomarkers in health and diseases. Herein we report a novel high throughput "sample-in-answer-out" integrated platform for continuous leukocyte sorting and single-cell electrical profiling in a label-free manner. The multi-staged platform enables isolation of neutrophils and monocytes from diluted or lysed blood samples directly within minutes based on Dean flow fractionation (DFF) (stage 1). Next DFF-purified leukocytes are inertially focused in serpentine channels into a single stream (stage 2) prior to impedance detection (stage 3). As a proof-of-concept for neutrophil functional characterization towards diabetes testing, we characterized the formation of neutrophil extracellular traps (NETosis) of healthy and glucose-treated neutrophils and observed significant changes in dielectric properties (size and opacity) between both groups. Interestingly, the NETosis profiles induced by calcium ionophore (CaI) and phorbol 12-myristate 13-acetate (PMA) were also electrically different, which could be attributed to the differential rates of cell enlargement and attenuated membrane permeability. Taken together, these results clearly demonstrated the potential of the developed platform for rapid (∼mins) and label-free leukocyte profiling and the use of impedance signatures as novel functional biomarkers for point-of-care testing in diabetes.
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Affiliation(s)
- Chayakorn Petchakup
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Block N3, 639798 Singapore.
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16
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Ellett F, Jalali F, Marand AL, Jorgensen J, Mutlu BR, Lee J, Raff AB, Irimia D. Microfluidic arenas for war games between neutrophils and microbes. LAB ON A CHIP 2019; 19:1205-1216. [PMID: 30865740 PMCID: PMC6544356 DOI: 10.1039/c8lc01263f] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Measurements of neutrophil activities such as cell migration and phagocytosis are generally performed using low-content bulk assays, which provide little detail activity at the single cell level, or flow cytometry methods, which have the single cell resolution but lack perspective on the kinetics of the process. Here, we present a microfluidic assay for measuring the essential functions that contribute to the antimicrobial activity of neutrophils: migration towards the target, and killing of microbes. The assay interrogates the interactions between isolated human neutrophils and populations of live, proliferating microbes. The outcome is measured in a binary mode that is reflective of in vivo infections, which are either cleared or endure the host response. The outcome of the interactions is also characterized at single cell resolution for both the neutrophils and the microbes. We applied the assay to test the response of neutrophils from intensive care patients to live Staphylococcus aureus, and observed alterations of antimicrobial neutrophil activity in patients, including those with sepsis. By directly measuring neutrophil activity against live targets at high spatial and temporal resolution, this assay provides unique insights into the life-or-death contest shaping the outcome of interactions between populations of neutrophils and microbes.
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Affiliation(s)
- Felix Ellett
- BioMEMS Resource Center, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Shriners Burns Hospital, Boston, MA 02129, USA.
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17
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Liu Y, Yang Q, Cao L, Xu F. Analysis of Leukocyte Behaviors on Microfluidic Chips. Adv Healthc Mater 2019; 8:e1801406. [PMID: 30672149 DOI: 10.1002/adhm.201801406] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 01/05/2019] [Indexed: 01/17/2023]
Abstract
The orchestration of massive leukocytes in the immune system protects humans from invading pathogens and abnormal cells in the body. So far, researches focusing on leukocyte behaviors are performed based on both in vivo and in vitro models. The in vivo animal models are usually less controllable due to their extreme complexity and nonignorable species issue. Therefore, many researchers turn to in vitro models. With the advances in micro/nanofabrication, the microfluidic chip has emerged as a novel platform for model construction in multiple biomedical research fields. Specifically, the microfluidic chip is used to study leukocyte behaviors, due to its incomparable advantages in high throughput, precise control, and flexible integration. Moreover, the small size of the microstructures on the microfluidic chip can better mimic the native microenvironment of leukocytes, which contributes to a more reliable recapitulation. Herein are reviewed the recent advances in microfluidic chip-based leukocyte behavior analysis to provide an overview of this field. Detailed discussions are specifically focused on host defense against pathogens, immunodiagnosis, and immunotherapy studies on microfluidic chips. Finally, the current technical challenges are discussed, as well as possible innovations in this field to improve the related applications.
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Affiliation(s)
- Yan Liu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology; Xi'an Jiaotong University; Xi'an Shaanxi 710049 China
- Bioinspired Engineering and Biomechanics Center (BEBC); Xi'an Jiaotong University; Xi'an Shaanxi 710049 China
| | - Qingzhen Yang
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology; Xi'an Jiaotong University; Xi'an Shaanxi 710049 China
- Bioinspired Engineering and Biomechanics Center (BEBC); Xi'an Jiaotong University; Xi'an Shaanxi 710049 China
| | - Lei Cao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology; Xi'an Jiaotong University; Xi'an Shaanxi 710049 China
- Bioinspired Engineering and Biomechanics Center (BEBC); Xi'an Jiaotong University; Xi'an Shaanxi 710049 China
| | - Feng Xu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education; School of Life Science and Technology; Xi'an Jiaotong University; Xi'an Shaanxi 710049 China
- Bioinspired Engineering and Biomechanics Center (BEBC); Xi'an Jiaotong University; Xi'an Shaanxi 710049 China
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18
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Campbell JM, Balhoff JB, Landwehr GM, Rahman SM, Vaithiyanathan M, Melvin AT. Microfluidic and Paper-Based Devices for Disease Detection and Diagnostic Research. Int J Mol Sci 2018; 19:E2731. [PMID: 30213089 PMCID: PMC6164778 DOI: 10.3390/ijms19092731] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 09/05/2018] [Accepted: 09/06/2018] [Indexed: 12/12/2022] Open
Abstract
Recent developments in microfluidic devices, nanoparticle chemistry, fluorescent microscopy, and biochemical techniques such as genetic identification and antibody capture have provided easier and more sensitive platforms for detecting and diagnosing diseases as well as providing new fundamental insight into disease progression. These advancements have led to the development of new technology and assays capable of easy and early detection of pathogenicity as well as the enhancement of the drug discovery and development pipeline. While some studies have focused on treatment, many of these technologies have found initial success in laboratories as a precursor for clinical applications. This review highlights the current and future progress of microfluidic techniques geared toward the timely and inexpensive diagnosis of disease including technologies aimed at high-throughput single cell analysis for drug development. It also summarizes novel microfluidic approaches to characterize fundamental cellular behavior and heterogeneity.
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Affiliation(s)
- Joshua M Campbell
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA 70803, USA.
| | - Joseph B Balhoff
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA 70803, USA.
| | - Grant M Landwehr
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA 70803, USA.
| | - Sharif M Rahman
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA 70803, USA.
| | | | - Adam T Melvin
- Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA 70803, USA.
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19
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Irimia D, Wang X. Inflammation-on-a-Chip: Probing the Immune System Ex Vivo. Trends Biotechnol 2018; 36:923-937. [PMID: 29728272 PMCID: PMC6098972 DOI: 10.1016/j.tibtech.2018.03.011] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 03/23/2018] [Accepted: 03/26/2018] [Indexed: 01/02/2023]
Abstract
Inflammation is the typical result of activating the host immune system against pathogens, and it helps to clear microbes from tissues. However, inflammation can occur in the absence of pathogens, contributing to tissue damage and leading to disease. Understanding how immune cells coordinate their activities to initiate, modulate, and terminate inflammation is key to developing effective interventions to preserve health and combat diseases. Towards this goal, inflammation-on-a-chip tools provide unique features that greatly benefit the study of inflammation. They reconstitute tissue environments in microfabricated devices and enable real-time, high-resolution observations and quantification of cellular activities relevant to inflammation. We review here recent advances in inflammation-on-a-chip technologies and highlight the biological insights and clinical applications enabled by these emerging tools.
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Affiliation(s)
- Daniel Irimia
- BioMEMS Resource Center, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Shriners Burns Hospital, Boston, MA
| | - Xiao Wang
- BioMEMS Resource Center, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Shriners Burns Hospital, Boston, MA
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20
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Label-free leukocyte sorting and impedance-based profiling for diabetes testing. Biosens Bioelectron 2018; 118:195-203. [PMID: 30077872 DOI: 10.1016/j.bios.2018.07.052] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 07/18/2018] [Accepted: 07/25/2018] [Indexed: 12/11/2022]
Abstract
Circulating leukocytes comprise of approximately 1% of all blood cells and efficient enrichment of these cells from whole blood is critical for understanding cellular heterogeneity and biological significance in health and diseases. In this work, we report a novel microfluidic strategy for rapid (< 1 h) label-free leukocyte sorting and impedance-based profiling to determine cell activation in type 2 diabetes mellitus (T2DM) using whole blood. Leukocytes were first size-fractionated into different subtypes (neutrophils, monocytes, lymphocytes) using an inertial spiral sorter prior to single-cell impedance measurement in a microfluidic device with coplanar electrode design. Significant changes in membrane dielectric properties (size and opacity) were detected between healthy and activated leukocytes (TNF-α/LPS stimulated), during monocyte differentiation and among different monocyte subsets (classical, intermediate, non-classical). As proof-of-concept for diabetes testing, neutrophil/monocyte dielectric properties in T2DM subjects (n = 8) were quantified which were associated with cardiovascular risk factors including lipid levels, C-reactive protein (CRP) and vascular functions (LnRHI) (P < 0.05) were observed. Overall, these results clearly showed that T2DM subjects have pro-inflammatory leukocyte phenotypes and suggest leukocyte impedance signature as a novel surrogate biomarker for inflammation.
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21
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Menegazzo L, Scattolini V, Cappellari R, Bonora BM, Albiero M, Bortolozzi M, Romanato F, Ceolotto G, Vigili de Kreutzeberg S, Avogaro A, Fadini GP. The antidiabetic drug metformin blunts NETosis in vitro and reduces circulating NETosis biomarkers in vivo. Acta Diabetol 2018; 55:593-601. [PMID: 29546579 DOI: 10.1007/s00592-018-1129-8] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Accepted: 03/07/2018] [Indexed: 12/19/2022]
Abstract
AIMS Diabetes is associated with an excess release of neutrophil extracellular traps (NETs) and an enhanced NETosis, a neutrophil cell death programme instrumental to anti-microbial defences, but also involved in tissue damage. We herein investigated whether the antidiabetic drug metformin protects against NETosis. METHODS We measured NET components in the plasma of patients with pre-diabetes who were randomized to receive metformin or placebo for 2 months. To control for the effect on glucose, we also measured NET components in the plasma of patients with type 2 diabetes before and after treatment with insulin or dapagliflozin. In vitro, we used static and dynamic imaging with advanced live confocal two-photon microscopy to evaluate the effects of metformin on cellular events during NETosis. We examined putative molecular mechanisms by monitoring chromatin decondensation and DNA release in vitro. RESULTS Metformin, as compared to placebo, significantly reduced the concentrations of NET components elastase, proteinase-3, histones and double strand DNA, whereas glucose control with insulin or dapagliflozin exerted no significant effect. In vitro, metformin prevented pathologic changes in nuclear dynamics and DNA release, resulting in a blunted NETosis in response to phorbol myristate acetate and calcium influx. Metformin prevented membrane translocation of PKC-βII and activation of NADPH oxidase in neutrophils, both of which diminished the NETosis response. CONCLUSIONS Metformin treatment reduced the concentrations of NET components independently from glucose control. This effect was reproducible in vitro and was related to the inhibitory effect exerted by metformin on the PKC-NADPH oxidase pathway.
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Affiliation(s)
- Lisa Menegazzo
- Department of Medicine, University of Padova, Via Giustiniani 2, 35128, Padua, Italy
- Venetian Institute of Molecular Medicine, 35129, Padua, Italy
| | - Valentina Scattolini
- Department of Medicine, University of Padova, Via Giustiniani 2, 35128, Padua, Italy
- Venetian Institute of Molecular Medicine, 35129, Padua, Italy
| | - Roberta Cappellari
- Department of Medicine, University of Padova, Via Giustiniani 2, 35128, Padua, Italy
- Venetian Institute of Molecular Medicine, 35129, Padua, Italy
| | - Benedetta Maria Bonora
- Department of Medicine, University of Padova, Via Giustiniani 2, 35128, Padua, Italy
- Venetian Institute of Molecular Medicine, 35129, Padua, Italy
| | - Mattia Albiero
- Department of Medicine, University of Padova, Via Giustiniani 2, 35128, Padua, Italy
- Venetian Institute of Molecular Medicine, 35129, Padua, Italy
| | - Mario Bortolozzi
- Venetian Institute of Molecular Medicine, 35129, Padua, Italy
- Department of Physics and Astronomy, University of Padova, 35131, Padua, Italy
| | - Filippo Romanato
- Department of Physics and Astronomy, University of Padova, 35131, Padua, Italy
- IOM-CNR, ss.14 km 163.5, 34149, Basovizza, Trieste, Italy
| | - Giulio Ceolotto
- Department of Medicine, University of Padova, Via Giustiniani 2, 35128, Padua, Italy
| | | | - Angelo Avogaro
- Department of Medicine, University of Padova, Via Giustiniani 2, 35128, Padua, Italy
| | - Gian Paolo Fadini
- Department of Medicine, University of Padova, Via Giustiniani 2, 35128, Padua, Italy.
- Venetian Institute of Molecular Medicine, 35129, Padua, Italy.
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