1
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Metelkina O, Huck B, O'Connor JS, Koch M, Manz A, Lehr CM, Titz A. Targeting extracellular lectins of Pseudomonas aeruginosa with glycomimetic liposomes. J Mater Chem B 2022; 10:537-548. [PMID: 34985094 DOI: 10.1039/d1tb02086b] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The antimicrobial resistance crisis requires novel approaches for the therapy of infections especially with Gram-negative pathogens. Pseudomonas aeruginosa is defined as priority 1 pathogen by the WHO and thus of particular interest. Its drug resistance is primarily associated with biofilm formation and essential constituents of its extracellular biofilm matrix are the two lectins, LecA and LecB. Here, we report microbial lectin-specific targeted nanovehicles based on liposomes. LecA- and LecB-targeted phospholipids were synthesized and used for the preparation of liposomes. These liposomes with varying surface ligand density were then analyzed for their competitive and direct lectin binding activity. We have further developed a microfluidic device that allowed the optical detection of the targeting process to the bacterial lectins. Our data showed that the targeted liposomes are specifically binding to their respective lectin and remain firmly attached to surfaces containing these lectins. This synthetic and biophysical study provides the basis for future application in targeted antibiotic delivery to overcome antimicrobial resistance.
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Affiliation(s)
- Olga Metelkina
- Chemical Biology of Carbohydrates, Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research, 66123 Saarbrücken, Germany. .,Deutsches Zentrum für Infektionsforschung (DZIF), Standort Hannover-Braunschweig, 38124 Braunschweig, Germany.,Department of Chemistry, Saarland University, 66123 Saarbrücken, Germany
| | - Benedikt Huck
- Drug Delivery, Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research, 66123 Saarbrücken, Germany.,Department of Pharmacy, Saarland University, 66123 Saarbrücken, Germany
| | - Jonathan S O'Connor
- KIST Europe, 66123 Saarbrücken, Germany.,Department of Systems Engineering, Saarland University, 66123 Saarbrücken, Germany
| | - Marcus Koch
- INM - Leibniz Institute for New Materials, 66123 Saarbrücken, Germany
| | - Andreas Manz
- KIST Europe, 66123 Saarbrücken, Germany.,Department of Systems Engineering, Saarland University, 66123 Saarbrücken, Germany
| | - Claus-Michael Lehr
- Drug Delivery, Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research, 66123 Saarbrücken, Germany.,Department of Pharmacy, Saarland University, 66123 Saarbrücken, Germany
| | - Alexander Titz
- Chemical Biology of Carbohydrates, Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research, 66123 Saarbrücken, Germany. .,Deutsches Zentrum für Infektionsforschung (DZIF), Standort Hannover-Braunschweig, 38124 Braunschweig, Germany.,Department of Chemistry, Saarland University, 66123 Saarbrücken, Germany
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2
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Inbody SC, Sinquefield BE, Lewis JP, Horton RE. Biomimetic microsystems for cardiovascular studies. Am J Physiol Cell Physiol 2021; 320:C850-C872. [PMID: 33760660 DOI: 10.1152/ajpcell.00026.2020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Traditional tissue culture platforms have been around for several decades and have enabled key findings in the cardiovascular field. However, these platforms failed to recreate the mechanical and dynamic features found within the body. Organs-on-chips (OOCs) are cellularized microfluidic-based devices that can mimic the basic structure, function, and responses of organs. These systems have been successfully utilized in disease, development, and drug studies. OOCs are designed to recapitulate the mechanical, electrical, chemical, and structural features of the in vivo microenvironment. Here, we review cardiovascular-themed OOC studies, design considerations, and techniques used to generate these cellularized devices. Furthermore, we will highlight the advantages of OOC models over traditional cell culture vessels, discuss implementation challenges, and provide perspectives on the state of the field.
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Affiliation(s)
- Shelby C Inbody
- Cardiovascular Tissue Engineering Laboratory, Biomedical Engineering Department, Cullen College of Engineering, University of Houston, Houston, Texas
| | - Bridgett E Sinquefield
- Cardiovascular Tissue Engineering Laboratory, Biomedical Engineering Department, Cullen College of Engineering, University of Houston, Houston, Texas
| | - Joshua P Lewis
- Cardiovascular Tissue Engineering Laboratory, Biomedical Engineering Department, Cullen College of Engineering, University of Houston, Houston, Texas
| | - Renita E Horton
- Cardiovascular Tissue Engineering Laboratory, Biomedical Engineering Department, Cullen College of Engineering, University of Houston, Houston, Texas
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3
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Aich A, Lamarre Y, Sacomani DP, Kashima S, Covas DT, de la Torre LG. Microfluidics in Sickle Cell Disease Research: State of the Art and a Perspective Beyond the Flow Problem. Front Mol Biosci 2021; 7:558982. [PMID: 33763448 PMCID: PMC7982466 DOI: 10.3389/fmolb.2020.558982] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 08/24/2020] [Indexed: 01/21/2023] Open
Abstract
Sickle cell disease (SCD) is the monogenic hemoglobinopathy where mutated sickle hemoglobin molecules polymerize to form long fibers under deoxygenated state and deform red blood cells (RBCs) into predominantly sickle form. Sickled RBCs stick to the vascular bed and obstruct blood flow in extreme conditions, leading to acute painful vaso-occlusion crises (VOCs) – the leading cause of mortality in SCD. Being a blood disorder of deformed RBCs, SCD manifests a wide-range of organ-specific clinical complications of life (in addition to chronic pain) such as stroke, acute chest syndrome (ACS) and pulmonary hypertension in the lung, nephropathy, auto-splenectomy, and splenomegaly, hand-foot syndrome, leg ulcer, stress erythropoiesis, osteonecrosis and osteoporosis. The physiological inception for VOC was initially thought to be only a fluid flow problem in microvascular space originated from increased viscosity due to aggregates of sickled RBCs; however, over the last three decades, multiple molecular and cellular mechanisms have been identified that aid the VOC in vivo. Activation of adhesion molecules in vascular endothelium and on RBC membranes, activated neutrophils and platelets, increased viscosity of the blood, and fluid physics driving sickled and deformed RBCs to the vascular wall (known as margination of flow) – all of these come together to orchestrate VOC. Microfluidic technology in sickle research was primarily adopted to benefit from mimicking the microvascular network to observe RBC flow under low oxygen conditions as models of VOC. However, over the last decade, microfluidics has evolved as a valuable tool to extract biophysical characteristics of sickle red cells, measure deformability of sickle red cells under simulated oxygen gradient and shear, drug testing, in vitro models of intercellular interaction on endothelialized or adhesion molecule-functionalized channels to understand adhesion in sickle microenvironment, characterizing biomechanics and microrheology, biomarker identification, and last but not least, for developing point-of-care diagnostic technologies for low resource setting. Several of these platforms have already demonstrated true potential to be translated from bench to bedside. Emerging microfluidics-based technologies for studying heterotypic cell–cell interactions, organ-on-chip application and drug dosage screening can be employed to sickle research field due to their wide-ranging advantages.
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Affiliation(s)
- Anupam Aich
- Intel Corporation, Hillsboro, OR, United States
| | - Yann Lamarre
- Center for Cell-based Therapy, Regional Blood Center of Ribeirão Preto, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Daniel Pereira Sacomani
- Department of Material and Bioprocess Engineering, School of Chemical Engineering, University of Campinas (UNICAMP), Campinas, Brazil
| | - Simone Kashima
- Center for Cell-based Therapy, Regional Blood Center of Ribeirão Preto, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Dimas Tadeu Covas
- Center for Cell-based Therapy, Regional Blood Center of Ribeirão Preto, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Lucimara Gaziola de la Torre
- Department of Material and Bioprocess Engineering, School of Chemical Engineering, University of Campinas (UNICAMP), Campinas, Brazil
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4
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Blakely IP, Horton RE. A microfluidic computational fluid dynamics model for cellular interaction studies of sickle cell disease vaso-occlusions. Microvasc Res 2020; 132:104052. [PMID: 32768462 DOI: 10.1016/j.mvr.2020.104052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 07/02/2020] [Accepted: 07/28/2020] [Indexed: 11/27/2022]
Abstract
Individuals with sickle cell disease are plagued with vaso-occlusions, chronic blockages within the vasculature. Several factors including stiffer sickle red blood cells and increased cell aggregation contribute to vaso-occlusion formation; however much remains to be understood. We present a computational fluid dynamics blood flow simulation within a microfluidic platform using the Carreau model and Murray's law. Vaso-occlusions form preferentially near bifurcations within 60 s in the sickle cell disease simulation. Velocity profiles and shear rates align with clinical and experimental reports. We assert that results from this study can be utilized to inform experimental investigations and microfluidic system design decisions.
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Affiliation(s)
- Ian P Blakely
- Agricultural and Biological Engineering, College of Arts and Life Sciences, James Worth Bagley College of Engineering, Mississippi State University, United States of America
| | - Renita E Horton
- Biomedical Engineering Department, Cullen College of Engineering, University of Houston, United States of America.
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5
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Aykar SS, Reynolds DE, McNamara MC, Hashemi NN. Manufacturing of poly(ethylene glycol diacrylate)-based hollow microvessels using microfluidics. RSC Adv 2020; 10:4095-4102. [PMID: 35492659 PMCID: PMC9049053 DOI: 10.1039/c9ra10264g] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Accepted: 01/10/2020] [Indexed: 12/27/2022] Open
Abstract
Biocompatible and self-standing poly(ethylene glycol diacrylate)-based hollow microvessels were fabricated from a microfluidic device using microfluidic principles.
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Affiliation(s)
- Saurabh S. Aykar
- Department of Mechanical Engineering
- Iowa State University
- Ames
- USA
| | | | | | - Nicole N. Hashemi
- Department of Mechanical Engineering
- Iowa State University
- Ames
- USA
- Department of Biomedical Sciences
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6
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Hesh CA, Qiu Y, Lam WA. Vascularized Microfluidics and the Blood-Endothelium Interface. MICROMACHINES 2019; 11:E18. [PMID: 31878018 PMCID: PMC7019435 DOI: 10.3390/mi11010018] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 12/19/2019] [Accepted: 12/20/2019] [Indexed: 12/13/2022]
Abstract
The microvasculature is the primary conduit through which the human body transmits oxygen, nutrients, and other biological information to its peripheral tissues. It does this through bidirectional communication between the blood, consisting of plasma and non-adherent cells, and the microvascular endothelium. Current understanding of this blood-endothelium interface has been predominantly derived from a combination of reductionist two-dimensional in vitro models and biologically complex in vivo animal models, both of which recapitulate the human microvasculature to varying but limited degrees. In an effort to address these limitations, vascularized microfluidics have become a platform of increasing importance as a consequence of their ability to isolate biologically complex phenomena while also recapitulating biochemical and biophysical behaviors known to be important to the function of the blood-endothelium interface. In this review, we discuss the basic principles of vascularized microfluidic fabrication, the contribution this platform has made to our understanding of the blood-endothelium interface in both homeostasis and disease, the limitations and challenges of these vascularized microfluidics for studying this interface, and how these inform future directions.
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Affiliation(s)
- Christopher A. Hesh
- Department of Radiology & Imaging Sciences, Emory University School of Medicine, Atlanta, GA 30322, USA;
| | - Yongzhi Qiu
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30322, USA
- Department of Pediatrics, Division of Pediatric Hematology/Oncology, Aflac Cancer Center and Blood Disorders Service of Children’s Healthcare of Atlanta, Emory University School of Medicine, Atlanta, GA 30322, USA
- Winship Cancer Institute of Emory University, Atlanta, GA 30322, USA
- Parker H. Petit Institute of Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30322, USA
| | - Wilbur A. Lam
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30322, USA
- Department of Pediatrics, Division of Pediatric Hematology/Oncology, Aflac Cancer Center and Blood Disorders Service of Children’s Healthcare of Atlanta, Emory University School of Medicine, Atlanta, GA 30322, USA
- Winship Cancer Institute of Emory University, Atlanta, GA 30322, USA
- Parker H. Petit Institute of Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30322, USA
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7
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Lizarralde Iragorri MA, El Hoss S, Brousse V, Lefevre SD, Dussiot M, Xu T, Ferreira AR, Lamarre Y, Silva Pinto AC, Kashima S, Lapouméroulie C, Covas DT, Le Van Kim C, Colin Y, Elion J, Français O, Le Pioufle B, El Nemer W. A microfluidic approach to study the effect of mechanical stress on erythrocytes in sickle cell disease. LAB ON A CHIP 2018; 18:2975-2984. [PMID: 30168832 DOI: 10.1039/c8lc00637g] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The human red blood cell is a biconcave disc of 6-8 × 2 μm that is highly elastic. This capacity to deform enables it to stretch while circulating through narrow capillaries to ensure its main function of gas exchange. Red cell shape and deformability are altered in membrane disorders because of defects in skeletal or membrane proteins affecting protein-protein interactions. Red cell properties are also altered in other pathologies such as sickle cell disease. Sickle cell disease is a genetic hereditary disorder caused by a single point mutation in the β-globin gene generating sickle haemoglobin (HbS). Hypoxia drives HbS polymerisation that is responsible for red cell sickling and reduced deformability. The main clinical features of sickle cell disease are vaso-occlusive crises and haemolytic anaemia. Foetal haemoglobin (HbF) inhibits HbS polymerisation and positively impacts red cell survival in the circulation but the mechanism through which it exerts this action is not fully characterized. In this study, we designed a microfluidic biochip mimicking the dimensions of human capillaries to measure the impact of repeated mechanical stress on the survival of red cells at the single cell scale under controlled pressure. We show that mechanical stress is a critical parameter underlying intravascular haemolysis in sickle cell disease and that high intracellular levels of HbF protect against lysis. The biochip is a promising tool to address red cell deformability in pathological situations and to screen for molecules positively impacting this parameter in order to improve red cell survival in the circulation.
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Affiliation(s)
- Maria Alejandra Lizarralde Iragorri
- Biologie Intégrée du Globule Rouge UMR_S1134, Inserm, Univ. Paris Diderot, Sorbonne Paris Cité, Univ. de la Réunion, Univ. des Antilles, INTS, 6 rue Alexandre Cabanel, 75015 Paris, France.
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8
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Abstract
In the 100 years since sickle cell anemia (SCA) was first described in the medical literature, studies of its molecular and pathophysiological basis have been at the vanguard of scientific discovery. By contrast, the translation of such knowledge into treatments that improve the lives of those affected has been much too slow. Recent years, however, have seen major advances on several fronts. A more detailed understanding of the switch from fetal to adult hemoglobin and the identification of regulators such as BCL11A provide hope that these findings will be translated into genomic-based approaches to the therapeutic reactivation of hemoglobin F production in patients with SCA. Meanwhile, an unprecedented number of new drugs aimed at both the treatment and prevention of end-organ damage are now in the pipeline, outcomes from potentially curative treatments such as allogeneic hematopoietic stem cell transplantation are improving, and great strides are being made in gene therapy, where methods employing both antisickling β-globin lentiviral vectors and gene editing are now entering clinical trials. Encouragingly, after a century of neglect, the profile of the vast majority of those with SCA in Africa and India is also finally improving.
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Affiliation(s)
- Thomas N Williams
- Department of Epidemiology and Demography, KEMRI/Wellcome Trust Research Programme, Kilifi, Kenya
- Department of Medicine, Imperial College London, London W2 1NY, United Kingdom;
| | - Swee Lay Thein
- Sickle Cell Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892-1589, USA;
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9
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Mannino RG, Qiu Y, Lam WA. Endothelial cell culture in microfluidic devices for investigating microvascular processes. BIOMICROFLUIDICS 2018; 12:042203. [PMID: 29861814 PMCID: PMC5953751 DOI: 10.1063/1.5024901] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 04/23/2018] [Indexed: 05/04/2023]
Abstract
Numerous conditions and disease states such as sickle cell disease, malaria, thrombotic microangiopathy, and stroke significantly impact the microvasculature function and its role in disease progression. Understanding the role of cellular interactions and microvascular hemodynamic forces in the context of disease is crucial to understanding disease pathophysiology. In vivo models of microvascular disease using animal models often coupled with intravital microscopy have long been utilized to investigate microvascular phenomena. However, these methods suffer from some major drawbacks, including the inability to tightly and quantitatively control experimental conditions, the difficulty of imaging multiple microvascular beds within a living organism, and the inability to isolate specific microvascular geometries such as bifurcations. Thus, there exists a need for in vitro microvascular models that can mitigate the drawbacks associated with in vivo systems. To that end, microfluidics has been widely used to develop such models, as it allows for tight control of system inputs, facile imaging, and the ability to develop robust and repeatable systems with well-defined geometries. Incorporating endothelial cells to branching microfluidic models allows for the development of "endothelialized" systems that accurately recapitulate physiological microvessels. In this review, we summarize the field of endothelialized microfluidics, specifically focusing on fabrication methods, limitations, and applications of these systems. We then speculate on future directions and applications of these cutting edge technologies. We believe that this review of the field is of importance to vascular biologists and bioengineers who aim to utilize microfluidic technologies to solve vascular problems.
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Affiliation(s)
| | | | - Wilbur A. Lam
- Author to whom correspondence should be addressed: . Tel.: 404-727-7473. Present address: 448 Emory Children's Center, 2015 Uppergate Drive, Atlanta, Georgia 30322, USA
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10
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Horton RE. Microfluidics for investigating vaso-occlusions in sickle cell disease. Microcirculation 2018; 24. [PMID: 28376286 DOI: 10.1111/micc.12373] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Accepted: 03/30/2017] [Indexed: 12/17/2022]
Abstract
SCD stems from amutation in the beta globin gene. Upon deoxygenation, hemoglobin polymerizes and triggers RBC remodeling. This phenomenon is central to SCD pathogenesis as individuals suffering from the disease are plagued by painful vaso-occlusive crises episodes. These episodes are the result of a combination of processes including inflammation, thrombosis, and blood cell adhesion to the vascular wall which leads to blockages within the vasculature termed vaso-occlusions. Vaso-occlusive episodes deprive tissues of oxygen and are a major contributor to SCD-related complications; unfortunately, the complex mechanisms that contribute to vaso-occlusions are not well understood. Vaso-occlusions can occur in post-capillary venules; hence, the microvasculature is a prime target for SCD therapies. Traditional in vitro systems poorly recapitulate architectural and dynamic flow properties of in vivo systems. However, microfluidic devices can capture features of the native vasculature such as cellular composition, flow, geometry, and ECM presentation. This review, although not comprehensive, highlights microfluidic approaches that aim to improve our current understanding of the pathophysiological mechanisms surrounding SCD. Microfluidic platforms can aid in identifying factors that may contribute to disease severity and can serve as suitable test beds for novel treatment strategies which may improve patient outcomes.
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Affiliation(s)
- Renita E Horton
- Agricultural and Biological Engineering Department, College of Agriculture and Life Sciences, James Worth Bagley College of Engineering, Mississippi State University, Starkville, MS, USA
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11
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Mannino RG, Pandian NK, Jain A, Lam WA. Engineering "Endothelialized" Microfluidics for Investigating Vascular and Hematologic Processes Using Non-Traditional Fabrication Techniques. CURRENT OPINION IN BIOMEDICAL ENGINEERING 2017; 5:13-20. [PMID: 29756078 DOI: 10.1016/j.cobme.2017.11.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Investigating the complex interplay between blood cells and the endothelium is crucial in understanding the pathophysiology of many diseases. Observation of the in vivo vasculature is difficult due to the complexities of vessel geometry, limited visualization capability, as well as variability and complexity inherent to biologic systems. Therefore, in vitro systems serve as ideal tools to study these cellular interactions. Microfluidic technologies are an ideal tool for recapitulating the vasculature in vivo as they can be used to fabricate fluidic channels on the size scale capillaries using gas permeable, biologically inert, and optically transparent substrates. Microfluidic channels can be vascularized by coating the inner surface of the microchannels with a confluent monolayer of endothelial cells, representing a reductionist, tightly controlled, in vitro model of the microvasculature. In this review, we present advances in the field of "endothelialized" microfluidics, focusing specifically on non-traditional fabrication and endothelialization techniques. We then summarize the various applications of endothelialized microfluidics, and speculate on the future directions of the field, including the exciting applications to personalized medicine.
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Affiliation(s)
- Robert G Mannino
- The Wallace H. Coulter Department of Biomedical Engineering at Georgia Tech and Emory University, Atlanta, GA
- The Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA
- Emory University School of Medicine, Department of Pediatrics, Division of Pediatric Hematology/Oncology, Atlanta, GA
- Children's Healthcare of Atlanta, Aflac Cancer & Blood Disorders Center
- Institute of Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA
| | - Navaneeth Kr Pandian
- Department of Biomedical Engineering, College of Engineering, Texas A&M University, College Station, TX
| | - Abhishek Jain
- Department of Biomedical Engineering, College of Engineering, Texas A&M University, College Station, TX
| | - Wilbur A Lam
- The Wallace H. Coulter Department of Biomedical Engineering at Georgia Tech and Emory University, Atlanta, GA
- The Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA
- Emory University School of Medicine, Department of Pediatrics, Division of Pediatric Hematology/Oncology, Atlanta, GA
- Children's Healthcare of Atlanta, Aflac Cancer & Blood Disorders Center
- Institute of Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA
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12
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Buckley EM, Platt MO, Lam WA. Novel in vivo and in vitro techniques to image and model the cerebral vasculature in sickle cell disease. Blood Cells Mol Dis 2017; 67:114-119. [PMID: 28822622 DOI: 10.1016/j.bcmd.2017.08.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 08/07/2017] [Indexed: 01/20/2023]
Affiliation(s)
- Erin M Buckley
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, United States; Department of Pediatrics, Emory University, United States.
| | - Manu O Platt
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, United States.
| | - Wilbur A Lam
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, United States; Department of Pediatrics, Emory University, United States; Aflac Cancer and Blood Disorders Center of Children's Healthcare of Atlanta, Department of Pediatrics, Emory University School of Medicine, Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, United States.
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13
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Movia D, Di Cristo L, Alnemari R, McCarthy JE, Moustaoui H, Lamy de la Chapelle M, Spadavecchia J, Volkov Y, Prina-Mello A. The curious case of how mimicking physiological complexity in in vitro models of the human respiratory system influences the inflammatory responses. A preliminary study focused on gold nanoparticles. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/jin2.25] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Dania Movia
- Laboratory for Biological Characterization of Advanced Materials (LBCAM), Trinity Translational Medicine Institute; School of Medicine, Trinity College; Dublin Ireland
| | - Luisana Di Cristo
- Laboratory for Biological Characterization of Advanced Materials (LBCAM), Trinity Translational Medicine Institute; School of Medicine, Trinity College; Dublin Ireland
| | - Roaa Alnemari
- Department of Clinical Medicine; School of Medicine, Trinity College; Dublin Ireland
| | | | - Hanane Moustaoui
- CNRS, UMR 7244, CSPBAT; Laboratoire de Chimie, Structures et Propriétés de Biomateriaux et d'Agents Therapeutiques Université Paris 13, Sorbonne Paris Cité, Bobigny, France CNRS; Paris France
| | - Marc Lamy de la Chapelle
- CNRS, UMR 7244, CSPBAT; Laboratoire de Chimie, Structures et Propriétés de Biomateriaux et d'Agents Therapeutiques Université Paris 13, Sorbonne Paris Cité, Bobigny, France CNRS; Paris France
| | - Jolanda Spadavecchia
- CNRS, UMR 7244, CSPBAT; Laboratoire de Chimie, Structures et Propriétés de Biomateriaux et d'Agents Therapeutiques Université Paris 13, Sorbonne Paris Cité, Bobigny, France CNRS; Paris France
| | - Yuri Volkov
- Laboratory for Biological Characterization of Advanced Materials (LBCAM), Trinity Translational Medicine Institute; School of Medicine, Trinity College; Dublin Ireland
- Department of Clinical Medicine; School of Medicine, Trinity College; Dublin Ireland
- CRANN Institute, AMBER Centre; Trinity College; Dublin Ireland
| | - Adriele Prina-Mello
- Laboratory for Biological Characterization of Advanced Materials (LBCAM), Trinity Translational Medicine Institute; School of Medicine, Trinity College; Dublin Ireland
- Department of Clinical Medicine; School of Medicine, Trinity College; Dublin Ireland
- CRANN Institute, AMBER Centre; Trinity College; Dublin Ireland
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14
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Irimia D, Ellett F. Big insights from small volumes: deciphering complex leukocyte behaviors using microfluidics. J Leukoc Biol 2016; 100:291-304. [PMID: 27194799 DOI: 10.1189/jlb.5ru0216-056r] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 04/04/2016] [Indexed: 12/13/2022] Open
Abstract
Inflammation is an indispensable component of the immune response, and leukocytes provide the first line of defense against infection. Although the major stereotypic leukocyte behaviors in response to infection are well known, the complexities and idiosyncrasies of these phenotypes in conditions of disease are still emerging. Novel tools are indispensable for gaining insights into leukocyte behavior, and in the past decade, microfluidic technologies have emerged as an exciting development in the field. Microfluidic devices are readily customizable, provide tight control of experimental conditions, enable high precision of ex vivo measurements of individual as well as integrated leukocyte functions, and have facilitated the discovery of novel leukocyte phenotypes. Here, we review some of the most interesting insights resulting from the application of microfluidic approaches to the study of the inflammatory response. The aim is to encourage leukocyte biologists to integrate these new tools into increasingly more sophisticated experimental designs for probing complex leukocyte functions.
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Affiliation(s)
- Daniel Irimia
- BioMEMS Resource Center, Division of Surgery, Innovation and Bioengineering, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Shriners Burns Hospital, Boston, Massachusetts, USA
| | - Felix Ellett
- BioMEMS Resource Center, Division of Surgery, Innovation and Bioengineering, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Shriners Burns Hospital, Boston, Massachusetts, USA
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Klaene JJ, Flarakos C, Glick J, Barret JT, Zarbl H, Vouros P. Tracking matrix effects in the analysis of DNA adducts of polycyclic aromatic hydrocarbons. J Chromatogr A 2016; 1439:112-123. [PMID: 26607319 PMCID: PMC4789121 DOI: 10.1016/j.chroma.2015.10.057] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 09/18/2015] [Accepted: 10/18/2015] [Indexed: 11/25/2022]
Abstract
LC-MS using electrospray ionization is currently the method of choice in bio-organic analysis covering a wide range of applications in a broad spectrum of biological media. The technique is noted for its high sensitivity but one major limitation that hinders achievement of its optimal sensitivity is the signal suppression due to matrix inferences introduced by the presence of co-extracted compounds during the sample preparation procedure. The analysis of DNA adducts of common environmental carcinogens is particularly sensitive to such matrix effects as sample preparation is a multistep process which involves "contamination" of the sample due to the addition of enzymes and other reagents for digestion of the DNA in order to isolate the analyte(s). This problem is further exacerbated by the need to reach low levels of quantitation (LOQ in the ppb level) while also working with limited (2-5 μg) quantities of sample. We report here on the systematic investigation of ion signal suppression contributed by each individual step involved in the sample preparation associated with the analysis of DNA adducts of polycyclic aromatic hydrocarbon (PAH) using as model analyte BaP-dG, the deoxyguanosine (dG) adduct of benzo[a]pyrene (BaP). The individual matrix contribution of each one of these sources to analyte signal was systematically addressed as were any interactive effects. The information was used to develop a validated analytical protocol for the target biomarker at levels typically encountered in vivo using as little as 2 μg of DNA and applied to a dose response study using a metabolically competent cell line.
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MESH Headings
- 7,8-Dihydro-7,8-dihydroxybenzo(a)pyrene 9,10-oxide/analogs & derivatives
- 7,8-Dihydro-7,8-dihydroxybenzo(a)pyrene 9,10-oxide/analysis
- Benzo(a)pyrene/analysis
- Benzo(a)pyrene/pharmacology
- Carcinogens, Environmental/analysis
- Carcinogens, Environmental/pharmacology
- Cells, Cultured
- Chromatography, Liquid
- DNA Adducts/analysis
- DNA Adducts/pharmacology
- Deoxyguanosine/analogs & derivatives
- Deoxyguanosine/analysis
- Humans
- Mass Spectrometry
- Polycyclic Aromatic Hydrocarbons/analysis
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Affiliation(s)
- Joshua J Klaene
- Department of Chemistry and Chemical Biology and Barnett Institute, Northeastern University, Boston, MA 02115, USA
| | - Caroline Flarakos
- Department of Chemistry and Chemical Biology and Barnett Institute, Northeastern University, Boston, MA 02115, USA
| | - James Glick
- Department of Chemistry and Chemical Biology and Barnett Institute, Northeastern University, Boston, MA 02115, USA
| | - Jennifer T Barret
- Graduate School of Biomedical Sciences, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA; Environmental and Occupational Health Sciences Institute, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
| | - Helmut Zarbl
- Graduate School of Biomedical Sciences, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA; Environmental and Occupational Health Sciences Institute, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA; NIEHS Center for Environmental Exposures and Disease, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA; Department of Environmental and Occupational Medicine, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA
| | - Paul Vouros
- Department of Chemistry and Chemical Biology and Barnett Institute, Northeastern University, Boston, MA 02115, USA.
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Microfluidic Organ/Body-on-a-Chip Devices at the Convergence of Biology and Microengineering. SENSORS 2015; 15:31142-70. [PMID: 26690442 PMCID: PMC4721768 DOI: 10.3390/s151229848] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 11/16/2015] [Accepted: 12/04/2015] [Indexed: 12/24/2022]
Abstract
Recent advances in biomedical technologies are mostly related to the convergence of biology with microengineering. For instance, microfluidic devices are now commonly found in most research centers, clinics and hospitals, contributing to more accurate studies and therapies as powerful tools for drug delivery, monitoring of specific analytes, and medical diagnostics. Most remarkably, integration of cellularized constructs within microengineered platforms has enabled the recapitulation of the physiological and pathological conditions of complex tissues and organs. The so-called “organ-on-a-chip” technology, which represents a new avenue in the field of advanced in vitro models, with the potential to revolutionize current approaches to drug screening and toxicology studies. This review aims to highlight recent advances of microfluidic-based devices towards a body-on-a-chip concept, exploring their technology and broad applications in the biomedical field.
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Jimenez MA, Tutuncuoglu E, Barge S, Novelli EM, Sundd P. Quantitative microfluidic fluorescence microscopy to study vaso-occlusion in sickle cell disease. Haematologica 2015; 100:e390-3. [PMID: 25975836 DOI: 10.3324/haematol.2015.126631] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Affiliation(s)
- Maritza A Jimenez
- Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA, USA Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Egemen Tutuncuoglu
- Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA, USA
| | - Suchitra Barge
- Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA, USA
| | - Enrico M Novelli
- Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA, USA Division of Hematology and Oncology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Prithu Sundd
- Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA, USA Division of Pulmonary, Allergy and Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA, USA Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
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18
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Davies LC, Taylor PR. Tissue-resident macrophages: then and now. Immunology 2015; 144:541-8. [PMID: 25684236 PMCID: PMC4368161 DOI: 10.1111/imm.12451] [Citation(s) in RCA: 231] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 02/06/2015] [Accepted: 02/09/2015] [Indexed: 12/12/2022] Open
Abstract
Macrophages have been at the heart of immune research for over a century and are an integral component of innate immunity. Macrophages are often viewed as terminally differentiated monocytic phagocytes. They infiltrate tissues during inflammation, and form polarized populations that perform pro-inflammatory or anti-inflammatory functions. Tissue-resident macrophages were regarded as differentiated monocytes, which seed the tissues to perform immune sentinel and homeostatic functions. However, tissue-resident macrophages are not a homogeneous population, but are in fact a grouping of cells with similar functions and phenotypes. In the last decade, it has been revealed that many of these cells are not terminally differentiated and, in most cases, are not derived from haematopoiesis in the adult. Recent research has highlighted that tissue-resident macrophages cannot be grouped into simple polarized categories, especially in vivo, when they are exposed to complex signalling events. It has now been demonstrated that the tissue environment itself is a major controller of macrophage phenotype, and can influence the expression of many genes regardless of origin. This is consistent with the concept that cells within different tissues have diverse responses in inflammation. There is still a mountain to climb in the field, as it evolves to encompass not only tissue-resident macrophage diversity, but also categorization of specific tissue environments and the plasticity of macrophages themselves. This knowledge provides a new perspective on therapeutic strategies, as macrophage subsets can potentially be manipulated to control the inflammatory environment in a tissue-specific manner.
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Affiliation(s)
- Luke C Davies
- Cancer Inflammation Program, National Cancer Institute at Frederick, NIH, Frederick, MD, USA
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