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Rossi JF, Chiang HC, Lu ZY, Levon K, van Rhee F, Kanhai K, Fajgenbaum DC, Klein B. Optimisation of anti-interleukin-6 therapy: Precision medicine through mathematical modelling. Front Immunol 2022; 13:919489. [PMID: 35928820 PMCID: PMC9345304 DOI: 10.3389/fimmu.2022.919489] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 06/27/2022] [Indexed: 11/13/2022] Open
Abstract
BackgroundDysregulated interleukin (IL)-6 production can be characterised by the levels present, the kinetics of its rise and its inappropriate location. Rapid, excessive IL-6 production can exacerbate tissue damage in vital organs. In this situation, therapy with an anti-IL-6 or anti-IL-6 receptor (IL-6R) monoclonal antibody, if inappropriately dosed, may be insufficient to fully block IL-6 signalling and normalise the immune response.MethodsWe analysed inhibition of C-reactive protein (CRP) – a biomarker for IL-6 activity – in patients with COVID-19 or idiopathic multicentric Castleman disease (iMCD) treated with tocilizumab (anti-IL-6R) or siltuximab (anti-IL-6), respectively. We used mathematical modelling to analyse how to optimise anti-IL-6 or anti-IL-6R blockade for the high levels of IL-6 observed in these diseases.ResultsIL-6 signalling was insufficiently inhibited in patients with COVID-19 or iMCD treated with standard doses of anti-IL-6 therapy. Patients whose disease worsened throughout therapy had only partial inhibition of CRP production. Our model demonstrated that, in a scenario representative of iMCD with persistent high IL-6 production not controlled by a single dose of anti-IL-6 therapy, repeated administration more effectively inhibited IL-6 activity. In a situation with rapid, high, dysregulated IL-6 production, such as severe COVID-19 or a cytokine storm, repeated daily administration of an anti-IL-6/anti-IL-6R agent, or alternating daily doses of anti-IL-6 and anti-IL-6R therapies, could neutralise IL-6 activity.ConclusionIn clinical practice, IL-6 inhibition should be individualised based on pathophysiology to achieve full blockade of CRP production.FundingEUSA Pharma funded medical writing assistance and provided access to the phase II clinical data of siltuximab for analysis.
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Affiliation(s)
- Jean-François Rossi
- Hématologie-Immunothérapie, Institut du Cancer Avignon-Provence, Sainte Catherine, Avignon, France
- Faculté de Médecine Montpellier, Université de Montpellier, Montpellier, France
- *Correspondence: Jean-François Rossi,
| | - Hao-Chun Chiang
- New York University (NYU) Tandon School of Engineering, Brooklyn, NY, United States
| | - Zhao-Yang Lu
- Unité de Thérapie Cellulaire, CHU Montpellier Saint-Eloi, Montpellier, France
| | - Kalle Levon
- New York University (NYU) Tandon School of Engineering, Brooklyn, NY, United States
| | - Frits van Rhee
- Myeloma Center, University of Arkansas for Medical Sciences, Little Rock, AR, United States
| | - Karan Kanhai
- Medical Affairs, EUSA Pharma, Hemel Hempstead, United Kingdom
| | - David C. Fajgenbaum
- Center for Cytokine Storm Treatment & Laboratory, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Division of Translational Medicine and Human Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Bernard Klein
- Faculté de Médecine Montpellier, Université de Montpellier, Montpellier, France
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Lee WI, Subramanian A, Mueller S, Levon K, Nam CY, Rafailovich MH. Potentiometric Biosensors Based on Molecular-Imprinted Self-Assembled Monolayer Films for Rapid Detection of Influenza A Virus and SARS-CoV-2 Spike Protein. ACS Appl Nano Mater 2022; 5:5045-5055. [PMID: 35465271 PMCID: PMC9016774 DOI: 10.1021/acsanm.2c00068] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 03/29/2022] [Indexed: 05/05/2023]
Abstract
Rapid, yet accurate and sensitive testing has been shown to be critical in the control of spreading pandemic diseases such as COVID-19. Current methods which are highly sensitive and can differentiate different strains are slow and cannot be conveniently applied at the point of care. Rapid tests, meanwhile, require a high titer and are not sufficiently sensitive to discriminate between strains. Here, we report a rapid and facile potentiometric detection method based on nanoscale, three-dimensional molecular imprints of analytes on a self-assembled monolayer (SAM), which can deliver analyte-specific detection of both whole virions and isolated proteins in microliter amounts of bodily fluids within minutes. The detection substrate with nanoscale inverse surface patterns of analytes formed by a SAM identifies a target analyte by recognizing its surface nano- and molecular structures, which can be monitored by temporal measurement of the change in substrate open-circuit potential. The sensor unambiguously detected and differentiated H1N1 and H3N2 influenza A virions as well as the spike proteins of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and Middle-East respiratory syndrome (MERS) coronavirus in human saliva with limits of detection reaching 200 PFU/mL and 100 pg/mL for the viral particles and spike proteins, respectively. The demonstrated speed and specificity of detection, combined with a low required sample volume, high sensitivity, ease of potentiometric measurement, and simple sample collection and preparation, suggest that the technique can be used as a highly effective point-of-care diagnostic platform for a fast, accurate, and specific detection of various viral pathogens and their variants.
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Affiliation(s)
- Won-Il Lee
- Department
of Materials Science and Chemical Engineering, Stony Brook University, Stony
Brook, New York 11794, United States
| | - Ashwanth Subramanian
- Department
of Materials Science and Chemical Engineering, Stony Brook University, Stony
Brook, New York 11794, United States
| | | | - Kalle Levon
- Department
of Chemical and Biomolecular Engineering, New York University Tandon School of Engineering, Brooklyn, New York 11201, United States
| | - Chang-Yong Nam
- Department
of Materials Science and Chemical Engineering, Stony Brook University, Stony
Brook, New York 11794, United States
- Center
for Functional Nanomaterials, Brookhaven
National Laboratory, Upton, New York 11973, United States
| | - Miriam H. Rafailovich
- Department
of Materials Science and Chemical Engineering, Stony Brook University, Stony
Brook, New York 11794, United States
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3
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Rossi JF, Lu ZY, Massart C, Levon K. Dynamic Immune/Inflammation Precision Medicine: The Good and the Bad Inflammation in Infection and Cancer. Front Immunol 2021; 12:595722. [PMID: 33708198 PMCID: PMC7940508 DOI: 10.3389/fimmu.2021.595722] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 01/11/2021] [Indexed: 12/13/2022] Open
Abstract
Normal or “good” inflammation process starts from a local cellular response against injury or any infectious agent, with the activation of neutrophils, macrophages, Langerhans cells, dendritic cells, and innate immune cells. Cytokines and chemokines are produced to amplify the local inflammatory process followed by the migration of immune cells to the regional lymph nodes where adaptive immune response is initiated. Systemic inflammation enhances the biological response to mobilize additional cells from central and peripheral immune/hematopoietic system. Local mechanisms to limit inflammation are initiated and lead to healing. During the normal inflammatory process, there is a balance between the production of inflammatory chemokines/cytokines such as Tumor Necrosis Factor (TNF)-α, interleukin (IL)-6 and IL-1 and the production of compounds that limit inflammation and have an immune suppressive effect, such as IL-10 and Transforming Factor (TGF) β. IL-6 and IL-6/soluble IL-6 Receptor (R) complex stimulate liver cells to produce inflammatory proteins, which represents the systemic inflammation response. The magnitude and the duration of the systemic inflammatory response are linked to the cause, under genetic and epigenetic control. Significant inflammation as seen in septic shock, in severe forms of infections or in certain active cancers, represents the “bad inflammation”, correlated with a poor prognosis. In addition, the persistence of a chronic smoldering inflammation may lead to pathological situations which are observed in the majority of inflammatory, degenerative, dysmetabolic, or dysimmune diseases and cancer. Chronic smoldering inflammation is a cross between different pathological situations possibly linked. In addition, within the tumor microenvironment, inflammatory process results from different cellular mechanisms modulated by metabolic and vascular changes. On the contrary, a limited and balanced inflammation initiates the normal immune response, including the adaptive response which amplifies any immunotherapy, including vaccines. Immune checkpoint inhibitors and chimeric antigen receptor (CAR) T-cells are associated with cytokine release syndrome, a clinical risk leading to the use of anti-cytokine drugs. Nowadays, it is time to monitor the dynamic inflammatory process for a better immune precision medicine in both infections and cancer.
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Affiliation(s)
- Jean-François Rossi
- Hématologie-Immunothérapie, Institut du Cancer Avignon-Provence, Sainte Catherine, Avignon, France.,Faculté de médecine Montpellier, Université de Montpellier, Montpellier, France
| | - Zhao Yang Lu
- Unité de Thérapie Cellulaire, CHU Montpellier Saint-Eloi, Montpellier, France
| | | | - Kalle Levon
- New York University (NYU) Tandon School of Engineering, Six Metrotech Center, Brooklyn, NY, United States
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Honkamäki L, Joki T, Grigoryev NA, Levon K, Ylä-Outinen L, Narkilahti S. Novel method to produce a layered 3D scaffold for human pluripotent stem cell-derived neuronal cells. J Neurosci Methods 2020; 350:109043. [PMID: 33345946 DOI: 10.1016/j.jneumeth.2020.109043] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 12/10/2020] [Accepted: 12/11/2020] [Indexed: 01/13/2023]
Abstract
BACKGROUND Three-dimensional (3D) in vitro models have been developed into more in vivo resembling structures. In particular, there is a need for human-based models for neuronal tissue engineering (TE). To produce such a model with organized microenvironment for cells in central nervous system (CNS), a 3D layered scaffold composed of hydrogel and cell guiding fibers has been proposed. NEW METHOD Here, we describe a novel method for producing a layered 3D scaffold consisting of electrospun poly (L,D-lactide) fibers embedded into collagen 1 hydrogel to achieve better resemblance of cells' natural microenvironment for human pluripotent stem cell (hPSC)-derived neurons. The scaffold was constructed via a single layer-by-layer process using an electrospinning technique with a unique collector design. RESULTS The method enabled the production of layered 3D cell-containing scaffold in a single process. HPSC-derived neurons were found in all layers of the scaffold and exhibited a typical neuronal phenotype. The guiding fiber layers supported the directed cell growth and extension of the neurites inside the scaffold without additional functionalization. COMPARISON WITH EXISTING METHODS Previous methods have required several process steps to construct 3D layer-by-layer scaffolds. CONCLUSIONS We introduced a method to produce layered 3D scaffolds to mimic the cell guiding cues in CNS by alternating the soft hydrogel matrix and fibrous guidance cues. The produced scaffold successfully enabled the long-term culture of hPSC-derived neuronal cells. This layered 3D scaffold is a useful model for in vitro and in vivo neuronal TE applications.
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Affiliation(s)
- Laura Honkamäki
- NeuroGroup, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.
| | - Tiina Joki
- NeuroGroup, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Nikita A Grigoryev
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering, Brooklyn, NY, USA
| | - Kalle Levon
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering, Brooklyn, NY, USA
| | - Laura Ylä-Outinen
- NeuroGroup, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Susanna Narkilahti
- NeuroGroup, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
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Ricotta V, Yu Y, Clayton N, Chuang YC, Wang Y, Mueller S, Levon K, Simon M, Rafailovich M. A chip-based potentiometric sensor for a Zika virus diagnostic using 3D surface molecular imprinting. Analyst 2019; 144:4266-4280. [PMID: 31180088 DOI: 10.1039/c9an00580c] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The latest Zika virus (ZIKV) pandemic caused great international concern from explosively proliferating throughout the Americas. Currently, there is no vaccine to prevent Zika virus infection and available tests rely on antibodies or RNA. Unfortunately, antibody-based detection systems can result in false positive results and RNA-based detection systems are costly, time-consuming, and impractical for testing in remote regions. In this study, a potential point-of-care (POC) diagnostic system was developed using a chip-based potentiometric sensor to detect Zika virus using a 3D molecular imprinting technique. This chip-based potentiometric sensor system was able to detect 10-1 PFU mL-1 ZIKV in a buffered solution under 20 minutes without any sample manipulation. This sensor was tested against Dengue virus at clinical viral loads and showed no sign of cross-reactivity. When tested against human saliva samples containing clinical viral loads, this sensor was able to detect 10 PFU mL-1 ZIKV among the pool of bio-macromolecules. The high sensitivity and high selectivity demonstrated here proved that this lab-on-a-chip diagnostic has the potential to become a POC detection system for rapid and accurate screening of flaviviruses.
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Affiliation(s)
- Vincent Ricotta
- Department of Materials Science and Engineering, SUNY at Stony Brook, Stony Brook, NY 11794, USA.
| | - Yingjie Yu
- Department of Materials Science and Engineering, SUNY at Stony Brook, Stony Brook, NY 11794, USA.
| | - Nicholas Clayton
- Department of Materials Science and Engineering, SUNY at Stony Brook, Stony Brook, NY 11794, USA.
| | - Ya-Chen Chuang
- Department of Materials Science and Engineering, SUNY at Stony Brook, Stony Brook, NY 11794, USA.
| | - Yantian Wang
- Department of Materials Science and Engineering, SUNY at Stony Brook, Stony Brook, NY 11794, USA.
| | | | - Kalle Levon
- Department of Chemical and Biological Sciences, Polytechnic Institute of NYU, Brooklyn, NY 11201, USA
| | - Marcia Simon
- Department of Oral Biology and Pathology, SUNY at Stony Brook, Stony Brook, NY 11794, USA
| | - Miriam Rafailovich
- Department of Materials Science and Engineering, SUNY at Stony Brook, Stony Brook, NY 11794, USA.
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6
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Chiang HC, Wang Y, Zhang Q, Levon K. Optimization of the Electrodeposition of Gold Nanoparticles for the Application of High ly Sensitiv e, Label-Free Biosensor. Biosensors (Basel) 2019; 9:E50. [PMID: 30935158 PMCID: PMC6628353 DOI: 10.3390/bios9020050] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 03/26/2019] [Accepted: 03/29/2019] [Indexed: 11/16/2022]
Abstract
A highly sensitive electrochemical biosensor with a signal amplification platform of electrodeposited gold nanoparticle (AuNP) has been developed and characterized. The sizes of the synthesized AuNP were found to be critical for the performance of biosensor in which the sizes were dependent on HAuCl₄ and acid concentrations; as well as on scan cycles and scan rates in the gold electro-reduction step. Systematic investigations of the adsorption of proteins with different sizes from aqueous electrolyte solution onto the electrodeposited AuNP surface were performed with a potentiometric method and calibrated by design of experiment (DOE). The resulting amperometric glucose biosensors was demonstrated to have a low detection limit (> 50M) and a wide linear range after optimization with AuNP electrodeposition.
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Affiliation(s)
- Hao-Chun Chiang
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering, Six Metrotech Center, Brooklyn, NY 11201, USA.
| | - Yanyan Wang
- State Key Laboratory of Precision Measuring Technology & Instruments, School of Precision Instruments and Optoelectronics Engineering, Tianjin University, 300072 Tianjin, China.
| | - Qi Zhang
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering, Six Metrotech Center, Brooklyn, NY 11201, USA.
| | - Kalle Levon
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering, Six Metrotech Center, Brooklyn, NY 11201, USA.
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7
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Wang Y, Sokolov J, Levon K, Rafailovich M, Yu Y. Surface-imprinted biosensors for the detection of proteins, cancer markers and viruses. ACTA ACUST UNITED AC 2018. [DOI: 10.31300/ctps.18.2018.1-14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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8
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Phamduy P, Rizzo JR, Hudson TE, Torre M, Levon K, Porfiri M. Communicating through Touch: Macro Fiber Composites for Tactile Stimulation on the Abdomen. IEEE Trans Haptics 2018; 11:174-184. [PMID: 29927741 DOI: 10.1109/toh.2017.2781244] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Research into sensory substitution systems has expanded, as alternative senses are utilized in real-time to afford object recognition or spatial understanding. Tactile stimulation has long shown promise as a communicatory strategy when applied unobtrusively to the redundant surface areas of the skin. Here, a novel belt, integrating a matrix of macro fiber composites, is purposed to deliver tactile stimuli to the abdomen. The design and development of the belt is presented and a systematic experimental study is conducted to analyze the impact of frequency and duty cycle. The belt is a beta precursor to a soft haptic feedback device that will enable situational awareness and obstacle avoidance through the localization of tactile stimulation relative to a body-centric frame of reference in a local environment.
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9
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Zhang Q, Kaisti M, Prabhu A, Yu Y, Song YA, Rafailovich MH, Rahman A, Levon K. Polyaniline-functionalized ion-sensitive floating-gate FETs for the on-chip monitoring of peroxidase-catalyzed redox reactions. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2017.12.130] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Affiliation(s)
- Matti Kaisti
- University of Turku, Technology Research
Center, 20014 Turun Yliopisto, Finland
| | - Zhanna Boeva
- Åbo Akademi University, Faculty of
Science and Engineering, Johan Gadolin Process Chemistry Centre, Laboratory
of Analytical Chemistry, Biskopsgatan 8, Turku/Åbo, 20500, Finland
- Lomonosov Moscow State University, Chemistry Department,
Polymer Division, Leninskie
gory, 1, build, 119991, Moscow, Russian Federation
| | - Juho Koskinen
- University of Turku, Technology Research
Center, 20014 Turun Yliopisto, Finland
| | - Sami Nieminen
- University of Turku, Technology Research
Center, 20014 Turun Yliopisto, Finland
| | - Johan Bobacka
- Åbo Akademi University, Faculty of
Science and Engineering, Johan Gadolin Process Chemistry Centre, Laboratory
of Analytical Chemistry, Biskopsgatan 8, Turku/Åbo, 20500, Finland
| | - Kalle Levon
- NYU Tandon School of Engineering, Department
of Chemical and Biomolecular Engineering, Six Metrotech Center, Brooklyn, New York 11201, United States
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11
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Yu Y, Zhang Q, Chang CC, Liu Y, Yang Z, Guo Y, Wang Y, Galanakis DK, Levon K, Rafailovich M. Design of a molecular imprinting biosensor with multi-scale roughness for detection across a broad spectrum of biomolecules. Analyst 2016; 141:5607-17. [DOI: 10.1039/c6an01157h] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The molecular imprinting technique has tremendous applications in artificial enzymes, bioseparation, and sensor devices.
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Affiliation(s)
- Yingjie Yu
- Department of Materials Science and Engineering
- Stony Brook University
- Stony Brook
- USA
| | - Qi Zhang
- Department of Chemical and Biomolecular Engineering
- New York University Tandon School of Engineering
- Brooklyn
- USA
| | | | - Ying Liu
- ThINC Facility
- Advanced Energy Center
- Stony Brook
- USA
| | - Zhenhua Yang
- Department of Materials Science and Engineering
- Stony Brook University
- Stony Brook
- USA
| | - Yichen Guo
- Department of Materials Science and Engineering
- Stony Brook University
- Stony Brook
- USA
| | - Yantian Wang
- Department of Materials Science and Engineering
- Stony Brook University
- Stony Brook
- USA
| | - Dennis K. Galanakis
- Department of Medicine
- Stony Brook University School of Medicine
- Stony Brook
- USA
| | - Kalle Levon
- Department of Chemical and Biomolecular Engineering
- New York University Tandon School of Engineering
- Brooklyn
- USA
| | - Miriam Rafailovich
- Department of Materials Science and Engineering
- Stony Brook University
- Stony Brook
- USA
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Yu Y, Zhang Q, Buscaglia J, Chang CC, Liu Y, Yang Z, Guo Y, Wang Y, Levon K, Rafailovich M. Quantitative real-time detection of carcinoembryonic antigen (CEA) from pancreatic cyst fluid using 3-D surface molecular imprinting. Analyst 2016; 141:4424-31. [DOI: 10.1039/c6an00375c] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In this study, a real time potentiometric biosensor based on the 3D surface molecular imprinting was developed for CEA detection.
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Affiliation(s)
- Yingjie Yu
- Department of Materials Science and Engineering
- Stony Brook University
- Stony Brook
- USA
| | - Qi Zhang
- Department of Chemical and Biomolecular Engineering
- New York University Tandon School of Engineering
- Brooklyn
- USA
| | - Jonathan Buscaglia
- Department of Medicine
- Stony Brook University School of Medicine
- Stony Brook
- USA
| | | | - Ying Liu
- ThINC Facility
- Advanced Energy Center
- Stony Brook
- USA
| | - Zhenhua Yang
- Department of Materials Science and Engineering
- Stony Brook University
- Stony Brook
- USA
| | - Yichen Guo
- Department of Materials Science and Engineering
- Stony Brook University
- Stony Brook
- USA
| | - Yantian Wang
- Department of Materials Science and Engineering
- Stony Brook University
- Stony Brook
- USA
| | - Kalle Levon
- Department of Chemical and Biomolecular Engineering
- New York University Tandon School of Engineering
- Brooklyn
- USA
| | - Miriam Rafailovich
- Department of Materials Science and Engineering
- Stony Brook University
- Stony Brook
- USA
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Zhang Q, Prabhu A, San A, Al-Sharab JF, Levon K. A polyaniline based ultrasensitive potentiometric immunosensor for cardiac troponin complex detection. Biosens Bioelectron 2015; 72:100-6. [DOI: 10.1016/j.bios.2015.04.084] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 04/15/2015] [Accepted: 04/25/2015] [Indexed: 12/11/2022]
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Shokry H, Vanamo U, Wiltschka O, Niinimäki J, Lerche M, Levon K, Linden M, Sahlgren C. Mesoporous silica particle-PLA-PANI hybrid scaffolds for cell-directed intracellular drug delivery and tissue vascularization. Nanoscale 2015; 7:14434-14443. [PMID: 26252158 DOI: 10.1039/c5nr03983e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Instructive materials are expected to revolutionize stem cell based tissue engineering. As many stem cell cues have adverse effects on normal tissue homeostasis, there is a need to develop bioactive scaffolds which offer locally retained and cell-targeted drug delivery for intracellular release in targeted cell populations. Further, the scaffolds need to support vascularization to promote tissue growth and function. We have developed an electrospun PLA-PANI fiber scaffold, and incorporated mesoporous silica nanoparticles within the scaffold matrix to obtain cell-targeted and localized drug delivery. The isotropy of the scaffold can be tuned to find the optimal morphology for a given application and the scaffold is electroactive to support differentiation of contractile tissues. We demonstrate that there is no premature drug release from particles under physiological conditions over a period of one week and that the drug is released upon internalization of particles by cells within the scaffold. The scaffold is biocompatible, supports muscle stem cell differentiation and cell-seeded scaffolds are vascularized in vivo upon transplantation on the chorioallantoic membrane of chicken embryos. The scaffold is a step towards instructive biomaterials for local control of stem cell differentiation, and tissue formation supported by vascularization and without adverse effects on the homeostasis of adjacent tissues due to diffusion of biological cues.
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Affiliation(s)
- Hussein Shokry
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi University, P.O. Box 123, FI-20521, Turku, Finland.
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Mathur A, Blais S, Goparaju CMV, Neubert T, Pass H, Levon K. Development of a biosensor for detection of pleural mesothelioma cancer biomarker using surface imprinting. PLoS One 2013; 8:e57681. [PMID: 23516416 PMCID: PMC3596364 DOI: 10.1371/journal.pone.0057681] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Accepted: 01/28/2013] [Indexed: 11/18/2022] Open
Abstract
Hyaluronan-linked protein 1 (HAPLN1) which has been shown to be highly expressed in malignant pleural mesotheliomas (MPM), was detected in serum using an electrochemical surface-imprinting method. First, the detection method was optimized using Bovine serum albumin (BSA) as a model protein to mimic the optimal conditions required to imprint the similar molecular weight protein HAPLN1. BSA was imprinted on the gold electrode with hydroxyl terminated alkane thiols, which formed a self-assembled monolayer (SAM) around BSA. The analyte (BSA) was then washed away and its imprint (empty cavity with shape-memory) was used for detection of BSA in a solution, using electrochemical open-circuit potential method, namely potentiometry. Factors considered to optimize the conditions include incubation time, protein concentration, limit of detection and size of electrode. Matrix assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) was used to confirm selectivity of imprints. With the obtained imprinting control parameters, HAPLN1 was imprinted in duplicate and the detection of spiked HAPLN1 was successfully conducted in serum.
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Affiliation(s)
- Aabhas Mathur
- Department of Chemical and Biological Sciences, Polytechnic Institute of NYU, Brooklyn, New York, United States of America
| | - Steven Blais
- Kimmel Center of Biology and Medicine at Skirball Institute and Department of Pharmacology, NYU School of Medicine, New York City, New York, United States of America
| | - Chandra M. V. Goparaju
- Department of Cardiothoracic Surgery, NYU Medical Center, New York City, New York, United States of America
| | - Thomas Neubert
- Kimmel Center of Biology and Medicine at Skirball Institute and Department of Pharmacology, NYU School of Medicine, New York City, New York, United States of America
| | - Harvey Pass
- Department of Cardiothoracic Surgery, NYU Medical Center, New York City, New York, United States of America
| | - Kalle Levon
- Department of Chemical and Biological Sciences, Polytechnic Institute of NYU, Brooklyn, New York, United States of America
- * E-mail:
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Milakin KA, Korovin AN, Moroz EV, Levon K, Guiseppi-Elie A, Sergeyev VG. Polyaniline-Based Sensor Material for Potentiometric Determination of Ascorbic Acid. ELECTROANAL 2013. [DOI: 10.1002/elan.201300023] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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19
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20
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Zhang Q, Khajo A, Sai T, de Albuquerque I, Magliozzo RS, Levon K. Intramolecular Transport of Charge Carriers in Trimeric Aniline upon a Three-Step Acid Doping Process. J Phys Chem A 2012; 116:7629-35. [DOI: 10.1021/jp3027258] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qi Zhang
- Department
of Chemical and Biological
Sciences, Polytechnic Institute of New York University, Six MetroTech Center, Brooklyn, New York 11201, United States
| | - Abdelahad Khajo
- Department of Chemistry, Brooklyn College and the Graduate Center of the City University of New York, 2900 Bedford Avenue, Brooklyn, New York 11210,
United States
| | - Tsunehiro Sai
- Department
of Chemical and Biological
Sciences, Polytechnic Institute of New York University, Six MetroTech Center, Brooklyn, New York 11201, United States
| | - Ian de Albuquerque
- Department
of Chemical and Biological
Sciences, Polytechnic Institute of New York University, Six MetroTech Center, Brooklyn, New York 11201, United States
| | - Richard S. Magliozzo
- Department of Chemistry, Brooklyn College and the Graduate Center of the City University of New York, 2900 Bedford Avenue, Brooklyn, New York 11210,
United States
| | - Kalle Levon
- Department
of Chemical and Biological
Sciences, Polytechnic Institute of New York University, Six MetroTech Center, Brooklyn, New York 11201, United States
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21
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Scharf B, Clement CC, Wu XX, Morozova K, Zanolini D, Follenzi A, Larocca JN, Levon K, Sutterwala FS, Rand J, Cobelli N, Purdue E, Hajjar KA, Santambrogio L. Annexin A2 binds to endosomes following organelle destabilization by particulate wear debris. Nat Commun 2012; 3:755. [PMID: 22453828 DOI: 10.1038/ncomms1754] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Accepted: 02/16/2012] [Indexed: 11/09/2022] Open
Abstract
Endosomal functions are contingent on the integrity of the organelle-limiting membrane, whose disruption induces inflammation and cell death. Here we show that phagocytosis of ultrahigh molecular weight polyethylene particles induces damage to the endosomal-limiting membrane and results in the leakage of cathepsins into the cytosol and NLRP3-inflammasome activation. Annexin A2 recruitment to damaged organelles is shown by two-dimensional DIGE protein profiling, endosomal fractionation, confocal analysis of endogenous and annexin A2-GFP transfected cells, and immunogold labelling. Binding experiments, using fluorescent liposomes, confirms annexin A2 recruitment to endosomes containing phagocytosed polyethylene particles. Finally, an increase in cytosolic cathepsins, NLRP3-inflammasome activation, and IL-1 production is seen in dendritic cells from annexin A2-null mice, following exposure to polyethylene particles. Together, the results indicate a functional role of annexin A2 binding to endosomal membranes following organelle destabilization.
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Affiliation(s)
- Brian Scharf
- Department of Pathology, Albert Einstein College of Medicine, New York 10461, USA
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Nasybulin E, de Albuquerque I, Levon K. Electrochemical synthesis of oligothiophenes by radical termination of the growing macromolecular chain. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2011.12.114] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Yu B, Zhou Y, Wang D, Wang Z, Sugiura K, Sakata Y, Levon K. Effect of alkyl group length on the conductivity in the 2,3,7,8,12,13,17,18-octakis(alkyl-thio)tetraazaporphyrins and redox properties of the metallooctakis(hexyl-thio)tetraazaporphyrins. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424602000555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A series of 2,3,7,8,12,13,17,18-octakis(alkyl-thio)tetraazaporphyrins (H2OATTAP) with different alkyl chain lengths have been synthesized. Cyclic voltammetry and differential pulse voltammetry have been used to investigate the effect of the controlled lengths of the eight peripheral thioether tails on the redox behavior of the molecules. The electrochemical reduction of octakis(hexyl-thio)tetraazaporphyrins, MOHTTAP (where M = Cu , Ni ), was studied in 1,2-dichloroethane at a platinum electrode. The Cu derivative was oxidized in one single-electron-transfer step to yield a π-cation radical and reduced in three single-electron-transfer steps to yield a π-anion radical, dianion and trianion, respectively. For the Ni derivative, electron transfer reactions involving both the central metal atom and the macrocyclic ring were observed. Electron transfer pathways are proposed based upon voltammetric and in situ spectroelectrochemical results.
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Affiliation(s)
- Bin Yu
- Department of Chemistry and Chemical Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, NY 11201, USA
| | - Yanxiu Zhou
- Department of Chemistry and Chemical Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, NY 11201, USA
| | - Daike Wang
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Zhenxing Wang
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China
| | - Kenichi Sugiura
- The Institute of Science and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0074, Japan
| | - Yoshiteru Sakata
- The Institute of Science and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0074, Japan
| | - Kalle Levon
- Department of Chemistry and Chemical Engineering, Polytechnic University, Six Metrotech Center, Brooklyn, NY 11201, USA
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Nasybulin E, Feinstein J, Cox M, Kymissis I, Levon K. Electrochemically prepared polymer solar cell by three-layer deposition of poly(3,4-ethylenedioxythiophene)/poly(2,2′-bithiophene)/fullerene (PEDOT/PBT/C60). POLYMER 2011. [DOI: 10.1016/j.polymer.2011.06.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Abstract
ABSTRACTDodecylated C60 {(Do)nC60(H)n} and butylated C60 {(Bu)nC60(H)n} were synthesized. Spectroscopic and thermal methods, mass spectrometry, XPD, have been employed to characterize the products. X-ray Powder Diffraction (XPD) results reveal that the facecentered- cubic (fcc) structure of C60 expands to a primitive hexagonal structure upon butylation and to a layered structure upon dodecylation. Butylated C60 diffraction pattern has been indexed as a primitive hexagonal structure with ao = 11.5 angstroms and axial ratio = 1.169. The dodecylated C60 also shows sidechain melting behavior with a transition temperature of around 25°C. The paraffinic crystals are produced by the interdigitation of the sidechains. Butylated C60 does not show any sidechain melting.
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Husain M, Kumar V, Kumar R, Shakil NA, Sharma SK, Prasad AK, Olsen CE, Gupta RK, Malhotra SV, Van Der Eycken E, Depass AL, Levon K, Parmar VS. Enantioselective biocatalytic reactions on (±)-aryl alkyl ketones with native and modified porcine pancreatic lipase. BIOCATAL BIOTRANSFOR 2010. [DOI: 10.3109/10242421003734704] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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27
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Gupta S, Pandey MK, Levon K, Haag R, Watterson AC, Parmar VS, Sharma SK. Biocatalytic Approach for the Synthesis of Glycerol-Based Macroamphiphiles and their Self-Assembly to Micellar Nanotransporters. MACROMOL CHEM PHYS 2010. [DOI: 10.1002/macp.200900391] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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28
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Nasybulin E, Menshikova I, Sergeyev V, Levon K. Preparation of conductive polyaniline/nylon-6 composite films by polymerization of aniline in nylon-6 matrix. J Appl Polym Sci 2009. [DOI: 10.1002/app.30771] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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29
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Men’shikova IP, Pyshkina OA, Men’shikov EA, Nasybulin EN, Milakin KA, Levon K, Sergeev VG. Structure and characteristics of composite materials based on polyaniline and Nylon-6. Polym Sci Ser A 2009. [DOI: 10.1134/s0965545x09060133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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Levon K, Nasybulin E, Menshikova I, Sergeyev V, Zezin A. Potentiometric monitoring DNA hybridization with polyaniline/Nylon-6 working electrode. Polym Sci Ser A 2009. [DOI: 10.1134/s0965545x09060157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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31
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Menshikova IP, Pyshkina OA, Levon K, Sergeyev VG. Effect of polyaniline particle size on the properties of a polyaniline-nylon 6 composite. Colloid J 2009. [DOI: 10.1134/s1061933x09020124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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32
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Zhou Y, Yu B, Guiseppi-Elie A, Sergeyev V, Levon K. Potentiometric monitoring DNA hybridization. Biosens Bioelectron 2009; 24:3275-80. [PMID: 19477628 DOI: 10.1016/j.bios.2009.04.023] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2009] [Revised: 04/12/2009] [Accepted: 04/14/2009] [Indexed: 11/18/2022]
Abstract
The usual procedure to monitor the ion exchange of small ions utilizes a potentiometer with a selective membrane as part of the working electrode. As the next step, we have applied polyaniline electrodes to the monitoring the activity macromolecular ions during DNA hybridization. Single-strand oligonucleotide (ssODN) probes were immobilized using a nucleophilic substitution reaction of the thiolated ssODN molecules with polyaniline. The anionic phosphate groups of the probe molecules also interacted with the cationic-doped polyaniline surface. Three useful findings were observed with the potentiometric experiments. First, the binding of the complimentary target molecules with the immobilized probes revealed a substantial potential change. Further, potential change was observed neither with the non-complimentary targets nor with the samples with a mutation in the sequence. The last two experiments were important for the future evaluation of the impact of medium and potential interfering compounds: anionic groups and hydrogen bonding groups in the non-complimentary samples did not cause any interactions.
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Affiliation(s)
- Y Zhou
- Polymer Research Institute, Polytechnic Institute of New York University, NY, NY 11201, USA
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Zhou Y, Nagaoka T, Yu B, Levon K. Chiral Ligand Exchange Potentiometric Aspartic Acid Sensors with Polysiloxane Films Containing a Chiral Ligand N-Carbobenzoxy-Aspartic Acid. Anal Chem 2009; 81:1888-92. [DOI: 10.1021/ac801751n] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yanxiu Zhou
- Department of Applied Chemistry, Faculty of Engineering, Yamaguchi University, Tokiwadai, Ube 755-8611, Japan, and Polymer Research Institute, Polytechnic Institute of New York University, Six Metrotech Center, Brooklyn, New York 11201-3840
| | - Tsutomu Nagaoka
- Department of Applied Chemistry, Faculty of Engineering, Yamaguchi University, Tokiwadai, Ube 755-8611, Japan, and Polymer Research Institute, Polytechnic Institute of New York University, Six Metrotech Center, Brooklyn, New York 11201-3840
| | - Bin Yu
- Department of Applied Chemistry, Faculty of Engineering, Yamaguchi University, Tokiwadai, Ube 755-8611, Japan, and Polymer Research Institute, Polytechnic Institute of New York University, Six Metrotech Center, Brooklyn, New York 11201-3840
| | - Kalle Levon
- Department of Applied Chemistry, Faculty of Engineering, Yamaguchi University, Tokiwadai, Ube 755-8611, Japan, and Polymer Research Institute, Polytechnic Institute of New York University, Six Metrotech Center, Brooklyn, New York 11201-3840
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Wang Y, Zhou Y, Sokolov J, Rigas B, Levon K, Rafailovich M. A potentiometric protein sensor built with surface molecular imprinting method. Biosens Bioelectron 2008; 24:162-6. [DOI: 10.1016/j.bios.2008.04.010] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2008] [Revised: 03/23/2008] [Accepted: 04/08/2008] [Indexed: 11/27/2022]
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35
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Levon K. Abstract of "Diversity, Ethical Thinking, and Our Learning Society". J Long Term Eff Med Implants 2008. [DOI: 10.1615/jlongtermeffmedimplants.v18.i1.420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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36
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Kazakov S, Kaholek M, Gazaryan I, Krasnikov B, Miller K, Levon K. Ion concentration of external solution as a characteristic of micro- and nanogel ionic reservoirs. J Phys Chem B 2007; 110:15107-16. [PMID: 16884223 DOI: 10.1021/jp061044i] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ion-sensitive hydrogel is regarded as an ionic reservoir, i.e., a system capable of changing the external pH or ionic strength by accumulating or releasing ions. The concept of a hydrogel ionic reservoir was demonstrated for hydrogel particles of three different size ranges: macrogel (1000-6000 microm), microgel (approximately 20-200 microm), and nanogel (approximately 0.2 microm). Ion sensitivity of poly(N-isopropylacrylamide-co-1-vinylimidazole) (PNIPA-VI) microgels with imidazolyl (ionizable) groups was confirmed by the pH dependence of their volume, while nanogels were characterized by dynamic light scattering. On the contrary, the volume of poly(N-isopropylacrylamide) (PNIPA) microgels without ionizable groups was pH independent in the whole range of pH from 10 to 2. Four distinct regions of pH-behavior were observed for PNIPA-VI hydrogel micro- and nanoparticles using potentiometric titration of their suspensions. Time-resolved measurements of ion concentrations in the suspension of hydrogel particles revealed a substantial difference in kinetics of pH equilibration for (i) ion-sensitive hydrogels (PNIPA-VI) vs hydrogels without ionizable groups (PNIPA) and (ii) PNIPA-VI hydrogels of different sizes. On the basis of the experimental observations, a two-step mechanism affecting the kinetics of proton uptake into the hydrogel particles with ionizable groups was proposed: (1) fast binding of ions to the immediate surface of each particle and (2) a slower successive diffusion of bound sites into the next inner layer of polymer network. In accord with the mechanism proposed, a quasi-chemical kinetic model of pH relaxation to equilibrium was developed to fit the experimental data for the time course of proton uptake by macro-, micro-, and nanogels into two exponentials with the characteristic times of tau(1) and tau(2). We believe the same kinetic model will be pertinent to describe phenomenological and molecular mechanisms controlling proton transport in/out bacteria, cells, organelles, drug delivery vehicles, and other natural or artificial multifunctional ionic containers. The approach can be easily extended for the other ions (e.g., Na(+), K(+), and Ca(2+)).
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Affiliation(s)
- Sergey Kazakov
- Department of Chemistry and Physical Sciences, Pace University, 861 Bedford Road, Pleasantville, New York 10570, USA.
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Guo Y, Mylonakis A, Zhang Z, Lelkes PI, Levon K, Li S, Feng Q, Wei Y. Oligoaniline-Contained Electroactive Silsesquioxane Precursor for Synthesizing Novel Siliceous Materials. Macromolecules 2007. [DOI: 10.1021/ma0622985] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yi Guo
- Department of Chemistry and School of Biomedical Engineering & Engineering, Drexel University, Philadelphia, Pennsylvania 19104, Department of Chemical and Biological Sciences & Engineering, Polytechnic University, Brooklyn, New York 11201, and Department of Chemistry, Jilin University, Changchun 130023, P. R. China
| | - Andreas Mylonakis
- Department of Chemistry and School of Biomedical Engineering & Engineering, Drexel University, Philadelphia, Pennsylvania 19104, Department of Chemical and Biological Sciences & Engineering, Polytechnic University, Brooklyn, New York 11201, and Department of Chemistry, Jilin University, Changchun 130023, P. R. China
| | - Zongtao Zhang
- Department of Chemistry and School of Biomedical Engineering & Engineering, Drexel University, Philadelphia, Pennsylvania 19104, Department of Chemical and Biological Sciences & Engineering, Polytechnic University, Brooklyn, New York 11201, and Department of Chemistry, Jilin University, Changchun 130023, P. R. China
| | - Peter I. Lelkes
- Department of Chemistry and School of Biomedical Engineering & Engineering, Drexel University, Philadelphia, Pennsylvania 19104, Department of Chemical and Biological Sciences & Engineering, Polytechnic University, Brooklyn, New York 11201, and Department of Chemistry, Jilin University, Changchun 130023, P. R. China
| | - Kalle Levon
- Department of Chemistry and School of Biomedical Engineering & Engineering, Drexel University, Philadelphia, Pennsylvania 19104, Department of Chemical and Biological Sciences & Engineering, Polytechnic University, Brooklyn, New York 11201, and Department of Chemistry, Jilin University, Changchun 130023, P. R. China
| | - Shuxi Li
- Department of Chemistry and School of Biomedical Engineering & Engineering, Drexel University, Philadelphia, Pennsylvania 19104, Department of Chemical and Biological Sciences & Engineering, Polytechnic University, Brooklyn, New York 11201, and Department of Chemistry, Jilin University, Changchun 130023, P. R. China
| | - Qiuwei Feng
- Department of Chemistry and School of Biomedical Engineering & Engineering, Drexel University, Philadelphia, Pennsylvania 19104, Department of Chemical and Biological Sciences & Engineering, Polytechnic University, Brooklyn, New York 11201, and Department of Chemistry, Jilin University, Changchun 130023, P. R. China
| | - Yen Wei
- Department of Chemistry and School of Biomedical Engineering & Engineering, Drexel University, Philadelphia, Pennsylvania 19104, Department of Chemical and Biological Sciences & Engineering, Polytechnic University, Brooklyn, New York 11201, and Department of Chemistry, Jilin University, Changchun 130023, P. R. China
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Abstract
Nanoparticles have been extensively studied as drug delivery systems. In this review, we focus on a relatively new type of nanoparticles--lipobeads--a liposome-hydrogel assembly as a novel drug delivery system. An appropriate assemblage of spherical hydrogel particles and liposomes combines the properties of both classes of materials and may find a variety of biomedical applications. The bi-compartmental structure of lipobeads is a natural configuration. Thus, the technology of their preparation can be a key step of designing more stable and effective vaccines. Biocompatibility and stability, ability to deliver a broad range of bioactive molecules, environmental responsiveness of both inner nanogel core and external lipid bilayer, and individual specificity of both compartments make the liposome-nanogel design a versatile drug delivery system relevant for all known drug administration routes and suitable for different diseases with possibility of efficient targeting to different organs. New findings on reversible and irreversible aggregation of lipobeads can lead to novel combined drug delivery systems regarding lipobeads as multipurpose containers. The research on hydrogel-liposome submicrometer structures has just begun and fundamental studies on interactions between hydrogels and liposomes are in demand.
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Affiliation(s)
- Sergey Kazakov
- Department of Chemistry & Physical Sciences, Pace University, 861 Bedford Road, Pleasantville, NY 10570, USA
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Kabanov A, Levon K. Editorial [Hot Topic: Nanomedicine and Drug Delivery (Executive Editors: A.V. Kabanov and K. Levon)]. Curr Pharm Des 2006. [DOI: 10.2174/138161206779026290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Lewin M, Pearce EM, Levon K, Mey-Marom A, Zammarano M, Wilkie CA, Jang BN. Nanocomposites at elevated temperatures: migration and structural changes. POLYM ADVAN TECHNOL 2006. [DOI: 10.1002/pat.684] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
A potentiometric chemosensor for selective determination of dipicolinic acid (2,6-pyridinedicarboxylic acid, DPA) was developed based on the surface imprinting technique coupled with a nanoscale transducer: an indium tin oxide (ITO)-coated glass plate. The sensor fabrication conditions, optimal recognition condition, as well as selectivity, sensitivity, and stability of the DPA sensor have been investigated. The DPA sensor could recognize DPA from 3,5-pyridinedicarboxylic acid. Potentiometric measurements demonstrated selective detection of DPA in a concentration range of 1.5 x 10(-6) to 0.0194 M. The response time of DPA sensor for 4 x 10(-4) M DPA was 25 s. The potentiometric response of the DPA sensor to DPA is at 90% of its initial magnitude after 550 times measurement. The viability of such a modified ITO electrode in the presence of other inorganic, organic, and biological materials was probed.
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Affiliation(s)
- Yanxiu Zhou
- Polymer Research Institute, Polytechnic University, Six Metrotech Center, Brooklyn, NY 11201-3840, USA.
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Abstract
Carbohydrates act as ligands in many biological processes, including the folding and secretion of proteins, cell-cell recognition, adhesion, and sporulation in the Bacillus genus. Fluorescent-labeled disaccharide glycoconjugates have been applied to evaluate binding to bacterial spores assuming that the spore surface is covered with carbohydrates. This study has shown that specific recognition of bacterial spores is based on interactions between disaccharide glycoconjugates acting as ligands and monosaccharide units expressed on the exterior of bacterial spores. Using fluorophore-assisted carbohydrate electrophoresis (FACE), carbohydrates that are expressed on the exterior of the spores were enumerated. The findings have an impact on how to improve ligand selection, essential for sensor development. In addition, the findings provide new information for inhibition of bacterial spores, and in general, demonstrate how carbohydrates function as recognition signals in nature.
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Affiliation(s)
- Olga Tarasenko
- The Othmer Department of Chemical and Biological Sciences and Engineering, Polytechnic University, Brooklyn, NY 11201, USA
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Zhou Y, Yu B, Shiu E, Levon K. Potentiometric Sensing of Chemical Warfare Agents: Surface Imprinted Polymer Integrated with an Indium Tin Oxide Electrode. Anal Chem 2004; 76:2689-93. [PMID: 15144176 DOI: 10.1021/ac035072y] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Rapid and specific recognition of methylphosphonic acid (MPA), the degradation product of nerve agents sarin, soman, VX, etc., was achieved with potentiometric measurements using a chemical sensor fabricated by a surface imprinting technique coupled with a nanoscale transducer, indium tin oxide (ITO). An octadecylsiloxane thin layer was covalently bound to the ITO-coated glass surface in the presence of MPA. After extraction of MPA, potentiometric measurements showed selective detection of MPA. The selectivity of the sensor has been tested on other alkylphosphonic acids, such as ethylphosphonic acid and propylphosphonic acid, as well as tert-butylphosphonic acid. The viability of the sensor in the presence of other chemical analogues, such as organophosphorus pesticides and herbicides, was investigated.
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Affiliation(s)
- Yanxiu Zhou
- Polymer Research Institute, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201, USA
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Abstract
The interaction between liposomes modified with a particular peptide sequence and Bacillus subtilis spores was experimentally observed as (1) an increase in the average diameter of spore-related particles, and (2) the formation of dense and structured shells around the spores at higher concentrations of liposomes.
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Affiliation(s)
- Sergey Kazakov
- Polymer Research Institute, Polytechnic University, Six MetroTech Center, Brooklyn, NY 11201, USA
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46
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47
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Affiliation(s)
- Hanaa Khalil
- Polymer Research Institute, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201
| | - Kalle Levon
- Polymer Research Institute, Polytechnic University, Six Metrotech Center, Brooklyn, New York 11201
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48
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Khalil HSA, Levon K. Novel chemical methods for the infiltration of opal particles with electrically conductive polyaniline polymers. J Appl Polym Sci 2002. [DOI: 10.1002/app.11143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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49
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Green MM, Khatri CA, Reidy MP, Levon K. Dilute-solution chiral optical changes signal the thermally reversible gelation of poly(n-hexyl isocyanate) in hydrocarbon solvents. Macromolecules 2002. [DOI: 10.1021/ma00069a050] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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