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Wang W, Ibarlucea B, Huang C, Dong R, Al Aiti M, Huang S, Cuniberti G. Multi-metallic MOF based composites for environmental applications: synergizing metal centers and interactions. NANOSCALE HORIZONS 2024. [PMID: 38984482 DOI: 10.1039/d4nh00140k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/11/2024]
Abstract
The escalating threat of environmental issues to both nature and humanity over the past two decades underscores the urgency of addressing environmental pollutants. Metal-organic frameworks (MOFs) have emerged as highly promising materials for tackling these challenges. Since their rise in popularity, extensive research has been conducted on MOFs, spanning from design and synthesis to a wide array of applications, such as environmental remediation, gas storage and separation, catalysis, sensors, biomedical and drug delivery systems, energy storage and conversion, and optoelectronic devices, etc. MOFs possess a multitude of advantageous properties such as large specific surface area, tunable porosity, diverse pore structures, multi-channel design, and molecular sieve capabilities, etc., making them particularly attractive for environmental applications. MOF-based composites inherit the excellent properties of MOFs and also exhibit unique physicochemical properties and structures. The tailoring of central coordinated metal ions in MOFs is critical for their adaptability in environmental applications. Although many reviews on monometallic, bimetallic, and polymetallic MOFs have been published, few reviews focusing on MOF-based composites with monometallic, bimetallic, and multi-metallic centers in the context of environmental pollutant treatment have been reported. This review addresses this gap by providing an in-depth overview of the recent progress in MOF-based composites, emphasizing their applications in hazardous gas sensing, electromagnetic wave absorption (EMWA), and pollutant degradation in both aqueous and atmospheric environments and highlighting the importance of the number and type of metal centers present. Additionally, the various categories of MOFs are summarized. MOF-based composites demonstrate significant promise in addressing environmental challenges, and this review provides a clear and valuable perspective on their potential in environmental applications.
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Affiliation(s)
- Wei Wang
- Institute for Materials Science and Max Bergmann Center for Biomaterials, TUD Dresden University of Technology, Dresden, 01062, Germany.
| | - Bergoi Ibarlucea
- Institute for Materials Science and Max Bergmann Center for Biomaterials, TUD Dresden University of Technology, Dresden, 01062, Germany.
- TECNALIA, Basque Research and Technology Alliance (BRTA), Donostia-San Sebastian, 20009, Spain
| | - Chuanhui Huang
- Center for Advancing Electronics Dresden & Faculty of Chemistry and Food Chemistry, TUD Dresden University of Technology, Mommsenstrasse 4, 01062 Dresden, Germany
| | - Renhao Dong
- Center for Advancing Electronics Dresden & Faculty of Chemistry and Food Chemistry, TUD Dresden University of Technology, Mommsenstrasse 4, 01062 Dresden, Germany
| | - Muhannad Al Aiti
- Institute for Materials Science and Max Bergmann Center for Biomaterials, TUD Dresden University of Technology, Dresden, 01062, Germany.
- Dresden Center for Nanoanalysis, Technische Universität Dresden, 01062 Dresden, Germany
| | - Shirong Huang
- Institute for Materials Science and Max Bergmann Center for Biomaterials, TUD Dresden University of Technology, Dresden, 01062, Germany.
| | - Gianaurelio Cuniberti
- Institute for Materials Science and Max Bergmann Center for Biomaterials, TUD Dresden University of Technology, Dresden, 01062, Germany.
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Oliveira MS, Santos KFDN, de Paula RM, Vitorino LC, Bessa LA, Greer A, Di Mascio P, de Souza JCP, Martin-Didonet CCG. Nitric Oxide Detection Using a Chemical Trap Method for Applications in Bacterial Systems. Microorganisms 2023; 11:2210. [PMID: 37764053 PMCID: PMC10536504 DOI: 10.3390/microorganisms11092210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/24/2023] [Accepted: 08/30/2023] [Indexed: 09/29/2023] Open
Abstract
Plant growth-promoting bacteria (PGPB) can be incorporated in biofertilizer formulations, which promote plant growth in different ways, such as fixing nitrogen and producing phytohormones and nitric oxide (NO). NO is a free radical involved in the growth and defense responses of plants and bacteria. NO detection is vital for further investigation in different agronomically important bacteria. NO production in the presence of KNO3 was evaluated over 1-3 days using eight bacterial strains, quantified by the usual Griess reaction, and monitored by 2,3-diaminonaphthalene (DAN), yielding 2,3-naphthotriazole (NAT), as analyzed by fluorescence spectroscopy, gas chromatography-mass spectrometry, and high-performance liquid chromatography. The Greiss and trapping reaction results showed that Azospirillum brasilense (HM053 and FP2), Rhizobium tropici (Br322), and Gluconacetobacter diazotrophicus (Pal 5) produced the highest NO levels 24 h after inoculation, whereas Nitrospirillum amazonense (Y2) and Herbaspirillum seropedicae (SmR1) showed no NO production. In contrast to the literature, in NFbHP-NH4Cl-lactate culture medium with KNO3, NO trapping led to the recovery of a product with a molecular mass ion of 182 Da, namely, 1,2,3,4-naphthotetrazole (NTT), which contained one more nitrogen atom than the usual NAT product with 169 Da. This strategy allows monitoring and tracking NO production in potential biofertilizing bacteria, providing future opportunities to better understand the mechanisms of bacteria-plant interaction and also to manipulate the amount of NO that will sustain the PGPB.
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Affiliation(s)
- Marilene Silva Oliveira
- Instituto Federal de Educação, Ciência e Tecnologia Goiano, Departamento de Agroquímica, Campus Rio Verde, Rio Verde 75901-970, GO, Brazil; (L.A.B.); (J.C.P.d.S.)
- Câmpus Henrique Santillo de Ciências Exatas e Tecnológicas Henrique Santillo, BR 153 n° 3105—Fazenda Barreiro do Meio, Anápolis 75132-903, GO, Brazil; (K.F.D.N.S.); (R.M.d.P.); (C.C.G.M.-D.)
- Simple Agro Corporation, rua Parque General Borges Forte, 400, Jardim Goiás, Rio Verde 75903-421, GO, Brazil
| | - Karina F. D. N. Santos
- Câmpus Henrique Santillo de Ciências Exatas e Tecnológicas Henrique Santillo, BR 153 n° 3105—Fazenda Barreiro do Meio, Anápolis 75132-903, GO, Brazil; (K.F.D.N.S.); (R.M.d.P.); (C.C.G.M.-D.)
| | - Railane Monteiro de Paula
- Câmpus Henrique Santillo de Ciências Exatas e Tecnológicas Henrique Santillo, BR 153 n° 3105—Fazenda Barreiro do Meio, Anápolis 75132-903, GO, Brazil; (K.F.D.N.S.); (R.M.d.P.); (C.C.G.M.-D.)
| | - Luciana C. Vitorino
- Instituto Federal de Educação, Ciência e Tecnologia Goiano, Departamento de Agroquímica, Campus Rio Verde, Rio Verde 75901-970, GO, Brazil; (L.A.B.); (J.C.P.d.S.)
- Simple Agro Corporation, rua Parque General Borges Forte, 400, Jardim Goiás, Rio Verde 75903-421, GO, Brazil
| | - Layara A. Bessa
- Instituto Federal de Educação, Ciência e Tecnologia Goiano, Departamento de Agroquímica, Campus Rio Verde, Rio Verde 75901-970, GO, Brazil; (L.A.B.); (J.C.P.d.S.)
- Simple Agro Corporation, rua Parque General Borges Forte, 400, Jardim Goiás, Rio Verde 75903-421, GO, Brazil
| | - Alexander Greer
- Department of Chemistry, Brooklyn College, City University of New York, Brooklyn, NY 11210, USA;
- The Graduate Center, City University of New York, New York, NY 10016, USA
| | - Paolo Di Mascio
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo 05508-000, SP, Brazil;
| | - João C. P. de Souza
- Instituto Federal de Educação, Ciência e Tecnologia Goiano, Departamento de Agroquímica, Campus Rio Verde, Rio Verde 75901-970, GO, Brazil; (L.A.B.); (J.C.P.d.S.)
- Departamento de Química, Faculdade de Ciências, Universidade Estadual Paulista, Av. Eng. Luiz Edmundo Carrijo Coube, 14-01, São Paulo 17033-360, SP, Brazil
| | - Claudia C. G. Martin-Didonet
- Câmpus Henrique Santillo de Ciências Exatas e Tecnológicas Henrique Santillo, BR 153 n° 3105—Fazenda Barreiro do Meio, Anápolis 75132-903, GO, Brazil; (K.F.D.N.S.); (R.M.d.P.); (C.C.G.M.-D.)
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Cao H, Dang Y, Zhang Z, Chen F, Liu J, Sun Q, Xie Y, Xu Z, Zhang W. Rational Design of Cu-Doped Tetrahedron of Spinel Oxide for High-Performance Nitric Oxide Electrochemical Sensor. ACS APPLIED MATERIALS & INTERFACES 2023; 15:23489-23500. [PMID: 37139799 DOI: 10.1021/acsami.3c03176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The real-time detection of nitric oxide (NO) in living cells is essential to reveal its physiological processes. However, the popular electrochemical detection strategy is limited to the utilization of noble metals. The development of new detection candidates without noble metal species still maintaining excellent catalytic performance has become a big challenge. Herein, we propose a spinel oxide doped with heteroatom-Cu-doped Co3O4 (Cu-Co3O4) for the sensitive and selective detection of NO release from the living cells. The material is strategically designed with Cu occupying the tetrahedral (Td) center of Co3O4 through the formation of a Cu-O bond. The introduced Cu regulates the local coordination environment and optimizes the electronic structure of Co3O4, hybridizing with the N 2p orbital to enhance charge transfer. The CuTd site can well inhibit the current response to nitrite (NO2-), resulting in a high improvement in the electrochemical oxidation of NO. The selectivity of Cu-Co3O4 can be markedly improved by the pore size of the molecular sieve and the negative charge on the surface. The rapid transmission of electrons is due to the fact that Cu-Co3O4 can be uniformly and densely in situ grown on Ti foil. The rationally designed Cu-Co3O4 sensor displays excellent catalytic activity toward NO oxidation with a low limit of detection of 2.0 nM (S/N = 3) and high sensitivity of 1.9 μA nM-1 cm-2 in cell culture medium. The Cu-Co3O4 sensor also shows good biocompatibility to monitor the real-time NO release from living cells (human umbilical vein endothelial cells: HUVECs; macrophage: RAW 264.7 cells). It was found that a remarkable response to NO was obtained in different living cells when stimulated by l-arginine (l-Arg). Moreover, the developed biosensor could be used for real-time monitoring of NO released from macrophages polarized to a M1/M2 phenotype. This cheap and convenient doping strategy shows universality and can be used for sensor design of other Cu-doped transition metal materials. The Cu-Co3O4 sensor presents an excellent example through the design of proper materials to implement unique sensing requirements and sheds light on the promising strategy for electrochemical sensor fabrication.
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Affiliation(s)
- Hongshuai Cao
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Yijing Dang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Zhonghai Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Fengping Chen
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Jingyao Liu
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Qian Sun
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Yangchun Xie
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Zhiai Xu
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
| | - Wen Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China
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Balakrishnan G, Song J, Mou C, Bettinger CJ. Recent Progress in Materials Chemistry to Advance Flexible Bioelectronics in Medicine. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2106787. [PMID: 34751987 PMCID: PMC8917047 DOI: 10.1002/adma.202106787] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 10/15/2021] [Indexed: 05/09/2023]
Abstract
Designing bioelectronic devices that seamlessly integrate with the human body is a technological pursuit of great importance. Bioelectronic medical devices that reliably and chronically interface with the body can advance neuroscience, health monitoring, diagnostics, and therapeutics. Recent major efforts focus on investigating strategies to fabricate flexible, stretchable, and soft electronic devices, and advances in materials chemistry have emerged as fundamental to the creation of the next generation of bioelectronics. This review summarizes contemporary advances and forthcoming technical challenges related to three principal components of bioelectronic devices: i) substrates and structural materials, ii) barrier and encapsulation materials, and iii) conductive materials. Through notable illustrations from the literature, integration and device fabrication strategies and associated challenges for each material class are highlighted.
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Affiliation(s)
| | - Jiwoo Song
- Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
| | - Chenchen Mou
- Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
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Apak R, Calokerinos A, Gorinstein S, Segundo MA, Hibbert DB, Gülçin İ, Demirci Çekiç S, Güçlü K, Özyürek M, Çelik SE, Magalhães LM, Arancibia-Avila P. Methods to evaluate the scavenging activity of antioxidants toward reactive oxygen and nitrogen species (IUPAC Technical Report). PURE APPL CHEM 2021. [DOI: 10.1515/pac-2020-0902] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Abstract
This project was aimed to identify the quenching chemistry of biologically important reactive oxygen and nitrogen species (ROS/RNS, including radicals), to show antioxidant action against reactive species through H‐atom and electron transfer reactions, and to evaluate the ROS/RNS scavenging activity of antioxidants with existing analytical methods while emphasizing the underlying chemical principles and advantages/disadvantages of these methods. In this report, we focused on the applications and impact of existing assays on potentiating future research and innovations to evolve better methods enabling a more comprehensive study of different aspects of antioxidants and to provide a vocabulary of terms related to antioxidants and scavengers for ROS/RNS. The main methods comprise the scavenging activity measurement of the hydroxyl radical (•OH), dioxide(•1–) (O2
•–: commonly known as the superoxide radical), dihydrogen dioxide (H2O2: commonly known as hydrogen peroxide), hydroxidochlorine (HOCl: commonly known as hypochlorous acid), dioxidooxidonitrate(1–) (ONOO−: commonly known as the peroxynitrite anion), and the peroxyl radical (ROO•). In spite of the diversity of methods, there is currently a great need to evaluate the scavenging activity of antioxidant compounds in vivo and in vitro. In addition, there are unsatisfactory methods frequently used, such as non-selective UV measurement of H2O2 scavenging, producing negative errors due to incomplete reaction of peroxide with flavonoids in the absence of transition metal ion catalysts. We also discussed the basic mechanisms of spectroscopic and electrochemical nanosensors for measuring ROS/RNS scavenging activity of antioxidants, together with leading trends and challenges and a wide range of applications. This project aids in the identification of reactive species and quantification of scavenging extents of antioxidants through various assays, makes the results comparable and more understandable, and brings a more rational basis to the evaluation of these assays and provides a critical evaluation of existing ROS/RNS scavenging assays to analytical, food chemical, and biomedical/clinical communities by emphasizing the need for developing more refined, rapid, simple, and low‐cost assays and thus opening the market for a wide range of analytical instruments, including reagent kits and sensors.
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Affiliation(s)
- Reşat Apak
- Department of Chemistry , Istanbul University-Cerrahpaşa, Faculty of Engineering , Avcılar, 34320 Istanbul , Turkey
| | - Antony Calokerinos
- Department of Chemistry , National and Kapodistrian University of Athens, School of Sciences , Panepistimiopolis, 15771 Athens , Greece
| | - Shela Gorinstein
- The Hebrew University, Hadassah Medical School, School of Pharmacy, The Institute for Drug Research , Jerusalem , Israel
| | - Marcela Alves Segundo
- Department of Chemical Sciences , LAQV, REQUIMTE, Faculty of Pharmacy, University of Porto , Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto , Portugal
| | - David Brynn Hibbert
- New South Wales University, School of Chemistry , Sydney , NSW 2052 , Australia
| | - İlhami Gülçin
- Department of Chemistry , Faculty of Science, Atatürk University , Erzurum , Turkey
| | - Sema Demirci Çekiç
- Department of Chemistry , Istanbul University-Cerrahpaşa, Faculty of Engineering , Avcılar, 34320 Istanbul , Turkey
| | - Kubilay Güçlü
- Department of Chemistry , Adnan Menderes University, Faculty of Arts and Sciences , Aydın , Turkey
| | - Mustafa Özyürek
- Department of Chemistry , Istanbul University-Cerrahpaşa, Faculty of Engineering , Avcılar, 34320 Istanbul , Turkey
| | - Saliha Esin Çelik
- Department of Chemistry , Istanbul University-Cerrahpaşa, Faculty of Engineering , Avcılar, 34320 Istanbul , Turkey
| | - Luís M. Magalhães
- Department of Chemical Sciences , LAQV, REQUIMTE, Faculty of Pharmacy, University of Porto , Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto , Portugal
| | - Patricia Arancibia-Avila
- Departamento de Ciencias Básicas , Laboratorio de Ecofisiología y Microalgas, Universidad del Bio-Bio , Chillán , Chile
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6
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Mazrad ZAI, Schelle B, Nicolazzo JA, Leiske MN, Kempe K. Nitrile-Functionalized Poly(2-oxazoline)s as a Versatile Platform for the Development of Polymer Therapeutics. Biomacromolecules 2021; 22:4618-4632. [PMID: 34647734 DOI: 10.1021/acs.biomac.1c00923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In recent years, polymers bearing reactive groups have received significant interest for biomedical applications. Numerous functional polymer platforms have been introduced, which allow for the preparation of materials with tailored properties via post-polymerization modifications. However, because of their reactivity, many functional groups are not compatible with the initial polymerization. The nitrile group is a highly interesting and relatively inert functionality that has mainly received attention in radical polymerizations. In this Article, a nitrile-functionalized 2-oxazoline monomer (2-(4-nitrile-butyl)-2-oxazoline, BuNiOx) is introduced, and its compatibility with the cationic ring-opening polymerization is demonstrated. Subsequently, the versatility of nitrile-functionalized poly(2-oxazoline)s (POx) is presented. To this end, diverse (co)polymers are synthesized and characterized by nuclear resonance spectroscopy, size-exclusion chromatography, and mass spectrometry. Amphiphilic block copolymers are shown to efficiently encapsulate the hydrophobic drug curcumin (CUR) in aqueous solution, and the anti-inflammatory effect of the CUR-containing nanostructures is presented in BV-2 microglia. Furthermore, the availability of the BuNiOx repeating units for post-polymerization modifications with hydroxylamine to yield amidoxime (AO)-functionalized POx is demonstrated. These AO-containing POx were successfully applied for the complexation of Fe(III) in a quantitative manner. In addition, AO-functionalized POx were shown to release nitric oxide intracellularly in BV-2 microglia. Thus nitrile-functionalized POx represent a promising and robust platform for the design of polymer therapeutics for a wide range of applications.
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Affiliation(s)
- Zihnil A I Mazrad
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, Monash University, Parkville, Victoria 3052, Australia.,Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Baptiste Schelle
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, Monash University, Parkville, Victoria 3052, Australia.,Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Joseph A Nicolazzo
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Meike N Leiske
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, Monash University, Parkville, Victoria 3052, Australia.,Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia
| | - Kristian Kempe
- ARC Centre of Excellence in Convergent Bio-Nano Science & Technology, Monash University, Parkville, Victoria 3052, Australia.,Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia.,Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia
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Zhang SX, Marzluff EM, Lindgren CA. Quantitative determination of nitric oxide from tissue samples using liquid chromatography-Mass spectrometry. MethodsX 2021; 8:101412. [PMID: 34430307 PMCID: PMC8374528 DOI: 10.1016/j.mex.2021.101412] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Revised: 05/21/2021] [Accepted: 06/08/2021] [Indexed: 11/23/2022] Open
Abstract
We report a method to measure NO by reacting it with carboxy-PTIO to form carboxy-PTI. The carboxy-PTI is quantified by liquid chromatography – mass spectrometry (LCMS). This method can quantitate NO concentrations ranging from 5 nM to 1 μM.
Ever since it was found to mediate the endothelium-dependent dilation of blood vessels, nitric oxide (NO) has generated enormous research interest throughout the biological sciences. Over thirty years of research has identified NO as a ubiquitous and versatile regulatory factor utilized by both vertebrates and invertebrates. The short lifetime and low concentration of NO make quantitation difficult. Here we report a method for measuring NO using the selective reaction with 2-(4-carboxyphenyl)-4,5-dihydro-4,4,5,5-tetramethyl-1H-imidazolyl-1-oxy-3-oxide (carboxy-PTIO) to form carboxy-PTI. We used tandem mass spectrometry to verify the validity of this reaction, and liquid chromatography – mass spectrometry to quantitate the amount of carboxy-PTI formed. Using diethylamine nonoate as a NO donor we demonstrate this method can quantitate NO concentrations with a detection limit of 5 nM. We successfully determined the amount of NO generated endogenously by frog heart/aorta when stimulated by carbachol, a non-selective acetylcholine receptor agonist. Based on these results, we suggest that this technique can be useful for the quantitative determination of NO in biological samples.We report a method to measure NO by reacting it with carboxy-PTIO to form carboxy-PTI. The carboxy-PTI is quantified by liquid chromatography mass spectrometry (LCMS). This method can quantitate NO concentrations ranging from 5 nM to 1 µM
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Affiliation(s)
- Stephen X Zhang
- Department of Biology, Grinnell College, Grinnell, IA 50112, United States
| | - Elaine M Marzluff
- Department of Chemistry, Grinnell College, Grinnell, IA 50112, United States
| | - Clark A Lindgren
- Department of Biology, Grinnell College, Grinnell, IA 50112, United States
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Wang TH, Eaton L, Pamenter ME. Nitric oxide homeostasis is maintained during acute in vitro hypoxia and following reoxygenation in naked mole-rat but not mouse cortical neurons. Comp Biochem Physiol A Mol Integr Physiol 2020; 250:110792. [PMID: 32805413 DOI: 10.1016/j.cbpa.2020.110792] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/09/2020] [Accepted: 08/09/2020] [Indexed: 11/27/2022]
Abstract
Reactive nitrogen species (RNS), including nitric oxide (NO), are important cellular messengers when tightly regulated, but unregulated production of RNS during hypoxia or ischemia and reoxygenation is deleterious to hypoxia-intolerant brain. Therefore, maintaining NO homeostasis during hypoxia/ischemia and reoxygenation may be a hallmark of hypoxia-tolerant brain. Unlike most mammals, naked mole-rats (NMRs; Heterocephalus glaber) are tolerant of repeated bouts of hypoxia in vivo. Although there is some evidence that NMR brain is tolerant of hypoxia/ischemia, little is known about the underlying neuroprotective mechanism(s), and their tolerance to reoxygenation injury has not been examined. We hypothesized that NMR brain would maintain NO homeostasis better than hypoxia-intolerant mouse brain during hypoxic/ischemic stresses and following reoxygenation. To test this, we exposed adult NMR and mouse cortical slices to transitions from normoxia (21% O2) to hypoxia (< 1% O2) or ischemia (oxygen glucose deprivation, OGD), followed by reoxygenation, while measuring neuronal NO production. We report that NMR cortical neurons maintain NO homeostasis during hypoxia/OGD and avoid bursts of NO upon reoxygenation. Conversely, mouse cortical neurons maintain NO homeostasis in OGD but not hypoxia and exhibit a burst of NO upon reperfusion. This suggests that maintenance of NO homeostasis during fluctuating O2 availability may be a contributing neuroprotective mechanism against hypoxia/ischemia and reoxygenation injury in hypoxia-tolerant NMR brain.
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Affiliation(s)
- Tina H Wang
- Department of Biology, University of Ottawa, Ottawa, ON, Canada
| | - Liam Eaton
- Department of Biology, University of Ottawa, Ottawa, ON, Canada
| | - Matthew E Pamenter
- Department of Biology, University of Ottawa, Ottawa, ON, Canada; University of Ottawa Brain and Mind Research Institute, Ottawa, ON, Canada.
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9
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Li R, Qi H, Ma Y, Deng Y, Liu S, Jie Y, Jing J, He J, Zhang X, Wheatley L, Huang C, Sheng X, Zhang M, Yin L. A flexible and physically transient electrochemical sensor for real-time wireless nitric oxide monitoring. Nat Commun 2020; 11:3207. [PMID: 32587309 PMCID: PMC7316789 DOI: 10.1038/s41467-020-17008-8] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Accepted: 06/08/2020] [Indexed: 12/31/2022] Open
Abstract
Real-time sensing of nitric oxide (NO) in physiological environments is critically important in monitoring neurotransmission, inflammatory responses, cardiovascular systems, etc. Conventional approaches for NO detection relying on indirect colorimetric measurement or built with rigid and permanent materials cannot provide continuous monitoring and/or require additional surgical retrieval of the implants, which comes with increased risks and hospital cost. Herein, we report a flexible, biologically degradable and wirelessly operated electrochemical sensor for real-time NO detection with a low detection limit (3.97 nmol), a wide sensing range (0.01-100 μM), and desirable anti-interference characteristics. The device successfully captures NO evolution in cultured cells and organs, with results comparable to those obtained from the standard Griess assay. Incorporated with a wireless circuit, the sensor platform achieves continuous sensing of NO levels in living mammals for several days. The work may provide essential diagnostic and therapeutic information for health assessment, treatment optimization and postsurgical monitoring.
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Affiliation(s)
- Rongfeng Li
- School of Materials Science and Engineering, The Key Laboratory of Advanced Materials of Ministry of Education, State Key Laboratory of New Ceramics and Fine Processing, Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084, China
| | - Hui Qi
- Laboratory of Musculoskeletal Regenerative Medicine, Beijing Institute of Traumatology and Orthopaedics, Beijing, 100035, China
| | - Yuan Ma
- Department of Electronic Engineering, Beijing National Research Center for Information Science and Technology and Beijing Innovation Center for Future Chips, Tsinghua University, Beijing, 100084, China
| | - Yuping Deng
- School of Materials Science and Engineering, The Key Laboratory of Advanced Materials of Ministry of Education, State Key Laboratory of New Ceramics and Fine Processing, Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084, China
| | - Shengnan Liu
- School of Materials Science and Engineering, The Key Laboratory of Advanced Materials of Ministry of Education, State Key Laboratory of New Ceramics and Fine Processing, Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084, China
| | - Yongsheng Jie
- Laboratory of Musculoskeletal Regenerative Medicine, Beijing Institute of Traumatology and Orthopaedics, Beijing, 100035, China
| | - Jinzhu Jing
- Animal Center, Beijing Institute of Traumatology and Orthopaedics, Beijing, 100035, China
| | - Jinlong He
- Tianjin Key Laboratory of Metabolic Diseases, Department of Physiology and Pathophysiology, Tianjin Medical University, Tianjin, 300070, China
| | - Xu Zhang
- Tianjin Key Laboratory of Metabolic Diseases, Department of Physiology and Pathophysiology, Tianjin Medical University, Tianjin, 300070, China
| | - Laura Wheatley
- Trinity College, University of Oxford, Oxford, OX1 3BH, UK
| | - Congxi Huang
- School of Materials Science and Engineering, The Key Laboratory of Advanced Materials of Ministry of Education, State Key Laboratory of New Ceramics and Fine Processing, Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084, China
| | - Xing Sheng
- Department of Electronic Engineering, Beijing National Research Center for Information Science and Technology and Beijing Innovation Center for Future Chips, Tsinghua University, Beijing, 100084, China
| | - Milin Zhang
- Department of Electronic Engineering, Beijing National Research Center for Information Science and Technology and Beijing Innovation Center for Future Chips, Tsinghua University, Beijing, 100084, China
| | - Lan Yin
- School of Materials Science and Engineering, The Key Laboratory of Advanced Materials of Ministry of Education, State Key Laboratory of New Ceramics and Fine Processing, Center for Flexible Electronics Technology, Tsinghua University, Beijing, 100084, China.
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10
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3, 3'-Diaminobenzidine with dual o-phenylenediamine groups: two in one enables visual colorimetric detection of nitric oxide. Anal Bioanal Chem 2020; 412:2545-2550. [PMID: 32072207 DOI: 10.1007/s00216-020-02482-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/20/2020] [Accepted: 02/03/2020] [Indexed: 12/28/2022]
Abstract
Nitric oxide (NO) plays an important role in the generation of smog and ozone. Although great efforts have been made to determine NO by using o-phenylenediamine (OPD)-based fluorescent probes, more simple and reliable colorimetric assays for detection of NO are extremely scarce because a single OPD structure cannot produce enough optical absorption for chromogenesis. In this study, we report an innovative two-in-one visual colorimetric methodology. Commercially available 3,3'-diaminobenzidine (DAB) with two OPD structures in a single molecule is selected as the colorimetric probe, and it reacts with NO via diazo-coupling reaction to generate 1H,3'H-[5,5']bibenzotriazolyl because of the increase of conjugated double bonds, accompanying a distinct color change from colorless to brownish yellow. This two-in-one colorimetric assay can determine NO at a concentration as low as 3 ppm by the naked eye and 40 ppb by UV-vis spectrometry, which is the lowest limit of detection (LOD) among reported colorimetric assays for NO. Moreover, the present two-in-one visual colorimetric assay also has good selectivity toward NO over other common potential gas interferents such as CO2, NO2, NH3, N2, O2, and SO2. This present study provides a new insight for the design and development of assays for NO. Graphical abstract.
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11
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Curcio MF, Batista WL, Castro ED, Strumillo ST, Ogata FT, Alkmim W, Brunialti MKC, Salomão R, Turcato G, Diaz RS, Monteiro HP, Janini LMR. Nitric oxide stimulates a PKC-Src-Akt signaling axis which increases human immunodeficiency virus type 1 replication in human T lymphocytes. Nitric Oxide 2019; 93:78-89. [PMID: 31539562 DOI: 10.1016/j.niox.2019.09.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 08/12/2019] [Accepted: 09/16/2019] [Indexed: 12/13/2022]
Abstract
Human immunodeficiency virus (HIV) infections are typically accompanied by high levels of secreted inflammatory cytokines and generation of high levels of reactive oxygen species (ROS). To elucidate how HIV-1 alters the cellular redox environment during viral replication, we used human HIV-1 infected CD4+T lymphocytes and uninfected cells as controls. ROS and nitric oxide (NO) generation, antioxidant enzyme activity, protein phosphorylation, and viral and proviral loads were measured at different times (2-36 h post-infection) in the presence and absence of the NO donor S-nitroso-N-acetylpenicillamine (SNAP). HIV-1 infection increased ROS generation and decreased intracellular NO content. Upon infection, we observed increases in copper/zinc superoxide dismutase (SOD1) and glutathione peroxidase (GPx) activities, and a marked decrease in glutathione (GSH) concentration. Exposure of HIV-1 infected CD4+T lymphocytes to SNAP resulted in an increasingly oxidizing intracellular environment, associated with tyrosine nitration and SOD1 inhibition. In addition, SNAP treatment promoted phosphorylation and activation of the host's signaling proteins, PKC, Src kinase and Akt. Inhibition of PKC leads to inhibition of Src kinase strongly suggesting that PKC is the upstream element in this signaling cascade. Changes in the intracellular redox environment after SNAP treatment had an effect on HIV-1 replication as reflected by increases in proviral and viral loads. In the absence or presence of SNAP, we observed a decrease in viral load in infected CD4+T lymphocytes pre-incubated with the PKC inhibitor GF109203X. In conclusion, oxidative/nitrosative stress conditions derived from exposure of HIV-1-infected CD4+T lymphocytes to an exogenous NO source trigger a signaling cascade involving PKC, Src kinase and Akt. Activation of this signaling cascade appears to be critical to the establishment of HIV-1 infection.
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Affiliation(s)
- Marli F Curcio
- Department of Medicine/Infectious Diseases, Universidade Federal de São Paulo, São Paulo, Brazil.
| | - Wagner L Batista
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo, São Paulo, Brazil; Department of Pharmaceutical Sciences, Universidade Federal de São Paulo, Diadema, Brazil
| | - Eloísa D Castro
- Department of Biochemistry/Molecular Biology, CTCMol, Universidade Federal de São Paulo, Brazil
| | - Scheilla T Strumillo
- Department of Biochemistry/Molecular Biology, CTCMol, Universidade Federal de São Paulo, Brazil
| | - Fernando T Ogata
- Structural and Functional Ecology of Ecosystems, Universidade Paulista, Sorocaba, Brazil
| | - Wagner Alkmim
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Milena K C Brunialti
- Department of Medicine/Infectious Diseases, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Reinaldo Salomão
- Department of Medicine/Infectious Diseases, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Gilberto Turcato
- Department of Medicine/Infectious Diseases, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Ricardo S Diaz
- Department of Medicine/Infectious Diseases, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Hugo P Monteiro
- Department of Biochemistry/Molecular Biology, CTCMol, Universidade Federal de São Paulo, Brazil
| | - Luiz Mário R Janini
- Department of Medicine/Infectious Diseases, Universidade Federal de São Paulo, São Paulo, Brazil; Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo, São Paulo, Brazil
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12
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Wright NJD. A review of the actions of Nitric Oxide in development and neuronal function in major invertebrate model systems. AIMS Neurosci 2019; 6:146-174. [PMID: 32341974 PMCID: PMC7179362 DOI: 10.3934/neuroscience.2019.3.146] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Accepted: 07/24/2019] [Indexed: 12/21/2022] Open
Abstract
Ever since the late-eighties when endothelium-derived relaxing factor was found to be the gas nitric oxide, endogenous nitric oxide production has been observed in virtually all animal groups tested and additionally in plants, diatoms, slime molds and bacteria. The fact that this new messenger was actually a gas and therefore didn't obey the established rules of neurotransmission made it even more intriguing. In just 30 years there is now too much information for useful comprehensive reviews even if limited to animals alone. Therefore this review attempts to survey the actions of nitric oxide on development and neuronal function in selected major invertebrate models only so allowing some detailed discussion but still covering most of the primary references. Invertebrate model systems have some very useful advantages over more expensive and demanding animal models such as large, easily identifiable neurons and simple circuits in tissues that are typically far easier to keep viable. A table summarizing this information along with the major relevant references has been included for convenience.
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Affiliation(s)
- Nicholas J D Wright
- Associate professor of pharmacy, Wingate University School of Pharmacy, Wingate, NC28174, USA
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13
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Expósito JR, Martín San Román S, Barreno E, Reig-Armiñana J, García-Breijo FJ, Catalá M. Inhibition of NO Biosynthetic Activities during Rehydration of Ramalina farinacea Lichen Thalli Provokes Increases in Lipid Peroxidation. PLANTS (BASEL, SWITZERLAND) 2019; 8:E189. [PMID: 31247947 PMCID: PMC6681199 DOI: 10.3390/plants8070189] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 06/14/2019] [Accepted: 06/17/2019] [Indexed: 12/29/2022]
Abstract
Lichens are poikilohydrous symbiotic associations between a fungus, photosynthetic partners, and bacteria. They are tolerant to repeated desiccation/rehydration cycles and adapted to anhydrobiosis. Nitric oxide (NO) is a keystone for stress tolerance of lichens; during lichen rehydration, NO limits free radicals and lipid peroxidation but no data on the mechanisms of its synthesis exist. The aim of this work is to characterize the synthesis of NO in the lichen Ramalina farinacea using inhibitors of nitrate reductase (NR) and nitric oxide synthase (NOS), tungstate, and NG-nitro-L-arginine methyl ester (L-NAME), respectively. Tungstate suppressed the NO level in the lichen and caused an increase in malondialdehyde during rehydration in the hyphae of cortex and in phycobionts, suggesting that a plant-like NR is involved in the NO production. Specific activity of NR in R. farinacea was 91 μU/mg protein, a level comparable to those in the bryophyte Physcomitrella patens and Arabidopsis thaliana. L-NAME treatment did not suppress the NO level in the lichens. On the other hand, NADPH-diaphorase activity cytochemistry showed a possible presence of a NOS-like activity in the microalgae where it is associated with cytoplasmatic vesicles. These data provide initial evidence that NO synthesis in R. farinacea involves NR.
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Affiliation(s)
- Joana R Expósito
- Department of Biology and Geology, Physics and Inorganic Chemistry, ESCET-Campus de Móstoles, C/Tulipán s/n, E-28933 Móstoles (Madrid), Spain.
| | - Sara Martín San Román
- Department of Biology and Geology, Physics and Inorganic Chemistry, ESCET-Campus de Móstoles, C/Tulipán s/n, E-28933 Móstoles (Madrid), Spain
| | - Eva Barreno
- Universitat de València, Botánica & ICBIBE-Jardí Botànic, Fac. CC. Biológicas, C/Dr. Moliner 50, 46100 Burjassot, Valencia, Spain
| | - José Reig-Armiñana
- Universitat de València, Botánica & ICBIBE-Jardí Botànic, Fac. CC. Biológicas, C/Dr. Moliner 50, 46100 Burjassot, Valencia, Spain
| | | | - Myriam Catalá
- Department of Biology and Geology, Physics and Inorganic Chemistry, ESCET-Campus de Móstoles, C/Tulipán s/n, E-28933 Móstoles (Madrid), Spain
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14
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Agrawal S, Kumari R, Luthra PM. A reliable fluorimetric method to screen the nitric oxide synthase inhibitors in 96 well plate. Anal Biochem 2019; 577:42-44. [PMID: 31009600 DOI: 10.1016/j.ab.2019.04.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 03/16/2019] [Accepted: 04/17/2019] [Indexed: 12/26/2022]
Abstract
In general, 4 amino-5-methylamino-2',7'-difluorescein diacetate (DAF-FM-DA) dye is used to detect nitric oxide in biological systems through cell imaging. In this study, we have used 96 well plate format to quantify nitric oxide using DAF-FM-DA through a multimode reader (or independently using fluorospectrometer) and could be visualized in a fluorescence microscope. Similar study otherwise will require a high-end instrument. The method has been validated to screen NOS inhibitors in the HEK 293T cell lines over-expressing the NOS isoforms. We observed that the method is very simple to use, adaptive, sensitive and most importantly it saves time. REAGENTS/TOOLS: Ethanol (70% [v/v] in distilled water), Nω-Nitro-l-arginine (l-NAME), 7-Nitro-Indazole (7-NI) (Sigma, St. Louis, MO), HEK 293T cell lines (National Centre for Cell Science (NCCS), Pune, India), DMEM (Himedia laboratories Pvt), Fetal Bovine Serum (FBS) (Invitrogen, Carlsbad, CA), 100 U/mL penicillin, and 0.1 mg/mL streptomycin in a 5% CO2 atmosphere. Hank's Balanced Salt Solution (HBSS) without Phenol Red of pH 7.4 was prepared with the following composition: NaCl, 8.0g, KCl, 0.4g, CaCl2, 0.14g, MgSO4⋅7H2O, 0.1g, MgCl2·6H2O, 0.1g, Na2HPO4·2H2O, 0.06g, KH2PO4, 0.06g, glucose, 1.0g, NaHCO3, 0.35g, H2O, to 1000 ml, Sterilized and refrigerated, Calcium Ionophore A23187 (Sigma Aldrich 52665-69-7) DAF-FM Di Acetate (Molecular Probes Life Technologies), and DAF-FM Di Aceatate was prepared as a stock solution (5 mM) in DMSO, divided into aliquots and stored at -20 °C, followed by dilution to the required concentration in HBSS buffer before use. EQUIPMENT: Neubauer chamber, Microtube centrifuges (1.5 mL), Micropipettors,10,100, and 1000 mL with corresponding tips, multimode reader (Tecan, Synergy-HT), inverted fluorescence microscope (Nikon, eclipse Ti-S), black flat bottom Microplates (96-well) (Corning 3603).
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Affiliation(s)
- Saurabh Agrawal
- Dr. BR Ambedkar Center for Biomedical Research, University of Delhi, Delhi, 110007, India.
| | - Rita Kumari
- Dr. BR Ambedkar Center for Biomedical Research, University of Delhi, Delhi, 110007, India.
| | - Pratibha Mehta Luthra
- Dr. BR Ambedkar Center for Biomedical Research, University of Delhi, Delhi, 110007, India.
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15
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Abstract
Many assays focus on determining NO content within plant tissues to assess the actual concentration that impacts on cellular processes. Diaminofluorescein fluorescent dyes (DAFs) have been very widely used by plant scientists to reveal likely sites of NO production inside and outside cells. In general, DAFs dyes react with N2O3, a byproduct of NO oxidation, resulting in fluorescence. It is initially available in the form of diacetate (DAF-2DA), which allowed the ready absorption by the cells. The diacetate group is removed by cell esterases leaving the membrane impermeable to DAF-2 and available for N2O3 nitration to generate the highly fluorescent triazole (DAF-2T). Here, we describe two methods for detection of NO by fluorescence, one for NO extracellular detection by DAF-2 and the other one for NO intracellular detection, in this case using DAF-2DA.
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16
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Mu YP, Huang QH, Zhu JL, Zheng SY, Yan FR, Zhuang XL, Sham JSK, Lin MJ. Magnesium attenuates endothelin-1-induced vasoreactivity and enhances vasodilatation in mouse pulmonary arteries: Modulation by chronic hypoxic pulmonary hypertension. Exp Physiol 2018; 103:604-616. [PMID: 29363240 DOI: 10.1113/ep086655] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 01/17/2018] [Indexed: 12/28/2022]
Abstract
NEW FINDINGS What is the central question of this study? The central goal of this study was to elucidate the role of magnesium in the regulation of pulmonary vascular reactivity in relationship to hypoxic pulmonary hypertension. What is the main finding and its importance? We found that magnesium is essential for normal vasoreactivity of the pulmonary artery. Increasing the magnesium concentration attenuates vasoconstriction and improves vasodilatation via release of nitric oxide. Pulmonary hypertension is associated with endothelial dysfunction resulting in the suppression of magnesium modulation of vasodilatation. These results provide evidence that magnesium is important for the modulation of pulmonary vascular function. ABSTRACT Pulmonary hypertension (PH) is characterized by enhanced vasoreactivity and sustained pulmonary vasoconstriction, arising from aberrant Ca2+ homeostasis in pulmonary arterial (PA) smooth muscle cells. In addition to Ca2+ , magnesium, the most abundant intracellular divalent cation, also plays crucial roles in many cellular processes that regulate cardiovascular function. Recent findings suggest that magnesium regulates vascular functions by altering the vascular responses to vasodilator and vasoactive agonists and affects endothelial function by modulating endothelium-dependent vasodilatation in hypertension. Administration of magnesium also decreased pulmonary arterial pressure and improved cardiac output in animal models of PH. However, the role of magnesium in the regulation of pulmonary vascular function related to PH has not been studied. In this study, we examined the effects of magnesium on endothelin-1 (ET-1)-induced vasoconstriction, ACh-induced vasodilatation and the generation of NO in PAs of normoxic mice and chronic hypoxia (CH)-treated mice. Our data showed that removal of extracellular magnesium suppressed vasoreactivity of PAs to both ET-1 and ACh. A high concentration of magnesium (4.8 mm) inhibited ET-1-induced vasoconstriction in endothelium-intact or endothelium-disrupted PAs of normoxic and CH-treated mice, and enhanced the ACh-induced production of NO in PAs of normoxic mice. Moreover, magnesium enhanced ACh-induced vasodilatation in PAs of normoxic mice, and the enhancement was completely abolished after exposure to CH. Hence, in this study we demonstrated that increasing the magnesium concentration can attenuate the ET-1-induced contractile response and improve vasodilatation via release of NO from the endothelium. We also demonstrated that chronic exposure to hypoxia can cause endothelial dysfunction resulting in suppression of the magnesium-dependent modulation of vasodilatation.
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Affiliation(s)
- Yun-Ping Mu
- The Key Laboratory of Fujian Province Universities on Ion Channel and Signal Transduction in Cardiovascular Diseases, Fujian Medical University, Fuzhou, Fujian, PR China.,Department of Physiology & Pathophysiology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian, PR China
| | - Qiu-Hong Huang
- The Key Laboratory of Fujian Province Universities on Ion Channel and Signal Transduction in Cardiovascular Diseases, Fujian Medical University, Fuzhou, Fujian, PR China.,Department of Physiology & Pathophysiology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian, PR China
| | - Jie-Ling Zhu
- The Key Laboratory of Fujian Province Universities on Ion Channel and Signal Transduction in Cardiovascular Diseases, Fujian Medical University, Fuzhou, Fujian, PR China.,Department of Physiology & Pathophysiology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian, PR China
| | - Si-Yi Zheng
- The Key Laboratory of Fujian Province Universities on Ion Channel and Signal Transduction in Cardiovascular Diseases, Fujian Medical University, Fuzhou, Fujian, PR China.,Department of Physiology & Pathophysiology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian, PR China
| | - Fu-Rong Yan
- The Key Laboratory of Fujian Province Universities on Ion Channel and Signal Transduction in Cardiovascular Diseases, Fujian Medical University, Fuzhou, Fujian, PR China.,Department of Physiology & Pathophysiology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian, PR China
| | - Xiao-Ling Zhuang
- The Key Laboratory of Fujian Province Universities on Ion Channel and Signal Transduction in Cardiovascular Diseases, Fujian Medical University, Fuzhou, Fujian, PR China.,Department of Physiology & Pathophysiology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian, PR China
| | - James S K Sham
- The Key Laboratory of Fujian Province Universities on Ion Channel and Signal Transduction in Cardiovascular Diseases, Fujian Medical University, Fuzhou, Fujian, PR China.,Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Mo-Jun Lin
- The Key Laboratory of Fujian Province Universities on Ion Channel and Signal Transduction in Cardiovascular Diseases, Fujian Medical University, Fuzhou, Fujian, PR China.,Department of Physiology & Pathophysiology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, Fujian, PR China
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17
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Lin YH, Liang HY, Xu K, Ni HY, Dong J, Xiao H, Chang L, Wu HY, Li F, Zhu DY, Luo CX. Dissociation of nNOS from PSD-95 promotes functional recovery after cerebral ischaemia in mice through reducing excessive tonic GABA release from reactive astrocytes. J Pathol 2017; 244:176-188. [DOI: 10.1002/path.4999] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 09/12/2017] [Accepted: 10/12/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Yu-Hui Lin
- Department of Pharmacology, School of Pharmacy; Nanjing Medical University; Nanjing PR China
| | - Hai-Ying Liang
- Department of Pharmacology, School of Pharmacy; Nanjing Medical University; Nanjing PR China
| | - Ke Xu
- Department of Pharmacology, School of Pharmacy; Nanjing Medical University; Nanjing PR China
| | - Huan-Yu Ni
- Department of Pharmacology, School of Pharmacy; Nanjing Medical University; Nanjing PR China
| | - Jian Dong
- Department of Pharmacology, School of Pharmacy; Nanjing Medical University; Nanjing PR China
| | - Hui Xiao
- Department of Pharmacology, School of Pharmacy; Nanjing Medical University; Nanjing PR China
| | - Lei Chang
- Department of Pharmacology, School of Pharmacy; Nanjing Medical University; Nanjing PR China
- Laboratory of Cerebrovascular Disease; Nanjing Medical University; Nanjing PR China
| | - Hai-Yin Wu
- Department of Pharmacology, School of Pharmacy; Nanjing Medical University; Nanjing PR China
- Laboratory of Cerebrovascular Disease; Nanjing Medical University; Nanjing PR China
| | - Fei Li
- Department of Medicinal Chemistry, School of Pharmacy; Nanjing Medical University; Nanjing PR China
| | - Dong-Ya Zhu
- Department of Pharmacology, School of Pharmacy; Nanjing Medical University; Nanjing PR China
- Laboratory of Cerebrovascular Disease; Nanjing Medical University; Nanjing PR China
| | - Chun-Xia Luo
- Department of Pharmacology, School of Pharmacy; Nanjing Medical University; Nanjing PR China
- Laboratory of Cerebrovascular Disease; Nanjing Medical University; Nanjing PR China
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18
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Cruz de Carvalho R, Catalá M, Branquinho C, Marques da Silva J, Barreno E. Dehydration rate determines the degree of membrane damage and desiccation tolerance in bryophytes. PHYSIOLOGIA PLANTARUM 2017; 159:277-289. [PMID: 27613446 DOI: 10.1111/ppl.12511] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 08/28/2016] [Accepted: 08/29/2016] [Indexed: 05/15/2023]
Abstract
Desiccation tolerant (DT) organisms are able to withstand an extended loss of body water and rapidly resume metabolism upon rehydration. This ability, however, is strongly dependent on a slow dehydration rate. Fast dehydration affects membrane integrity leading to intracellular solute leakage upon rehydration and thereby impairs metabolism recovery. We test the hypothesis that the increased cell membrane damage and membrane permeability observed under fast dehydration, compared with slow dehydration, is related to an increase in lipid peroxidation. Our results reject this hypothesis because following rehydration lipid peroxidation remains unaltered, a fact that could be due to the high increase of NO upon rehydration. However, in fast-dried samples we found a strong signal of red autofluorescence upon rehydration, which correlates with an increase in ROS production and with membrane leakage, particularly the case of phenolics. This could be used as a bioindicator of oxidative stress and membrane damage.
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Affiliation(s)
- Ricardo Cruz de Carvalho
- Centre for Ecology, Evolution and Environmental Changes (CE3c), Faculdade de Ciências, Universidade de Lisboa, Lisboa, 1749-016, Portugal
| | - Myriam Catalá
- Biología Celular, Dpto. Biología y Geología, Física y Química Inorgánica (ESCET), Universidad Rey Juan Carlos, Móstoles, Spain
| | - Cristina Branquinho
- Centre for Ecology, Evolution and Environmental Changes (CE3c), Faculdade de Ciências, Universidade de Lisboa, Lisboa, 1749-016, Portugal
| | - Jorge Marques da Silva
- BioISI, Biosystems and Integrative Sciences Institute and Departamento de Biologia Vegetal, Faculdade de Ciências, Universidade de Lisboa, Lisboa, 1749-016, Portugal
| | - Eva Barreno
- Botánica & ICBIBE, Universitat de València, Valencia, Spain
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19
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Neumann L, Mueller M, Moos V, Heller F, Meyer TF, Loddenkemper C, Bojarski C, Fehlings M, Doerner T, Allers K, Aebischer T, Ignatius R, Schneider T. Mucosal Inducible NO Synthase-Producing IgA+ Plasma Cells in Helicobacter pylori-Infected Patients. THE JOURNAL OF IMMUNOLOGY 2016; 197:1801-8. [PMID: 27456483 DOI: 10.4049/jimmunol.1501330] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 06/20/2016] [Indexed: 12/20/2022]
Abstract
The mucosal immune system is relevant for homeostasis, immunity, and also pathological conditions in the gastrointestinal tract. Inducible NO synthase (iNOS)-dependent production of NO is one of the factors linked to both antimicrobial immunity and pathological conditions. Upregulation of iNOS has been observed in human Helicobacter pylori infection, but the cellular sources of iNOS are ill defined. Key differences in regulation of iNOS expression impair the translation from mouse models to human medicine. To characterize mucosal iNOS-producing leukocytes, biopsy specimens from H. pylori-infected patients, controls, and participants of a vaccination trial were analyzed by immunohistochemistry, along with flow cytometric analyses of lymphocytes for iNOS expression and activity. We newly identified mucosal IgA-producing plasma cells (PCs) as one major iNOS(+) cell population in H. pylori-infected patients and confirmed intracellular NO production. Because we did not detect iNOS(+) PCs in three distinct infectious diseases, this is not a general feature of mucosal PCs under conditions of infection. Furthermore, numbers of mucosal iNOS(+) PCs were elevated in individuals who had cleared experimental H. pylori infection compared with those who had not. Thus, IgA(+) PCs expressing iNOS are described for the first time, to our knowledge, in humans. iNOS(+) PCs are induced in the course of human H. pylori infection, and their abundance seems to correlate with the clinical course of the infection.
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Affiliation(s)
- Laura Neumann
- Medical Clinic I, Gastroenterology, Infectious Diseases and Rheumatology, Charité-University Medicine Berlin, 12203 Berlin, Germany;
| | - Mattea Mueller
- Medical Clinic I, Gastroenterology, Infectious Diseases and Rheumatology, Charité-University Medicine Berlin, 12203 Berlin, Germany
| | - Verena Moos
- Medical Clinic I, Gastroenterology, Infectious Diseases and Rheumatology, Charité-University Medicine Berlin, 12203 Berlin, Germany
| | - Frank Heller
- Practice for Gastroenterology, 12163 Berlin, Germany
| | - Thomas F Meyer
- Department of Molecular Biology, Max Planck Institute for Infection Biology, 10117 Berlin, Germany
| | | | - Christian Bojarski
- Medical Clinic I, Gastroenterology, Infectious Diseases and Rheumatology, Charité-University Medicine Berlin, 12203 Berlin, Germany
| | - Michael Fehlings
- Department of Molecular Biology, Max Planck Institute for Infection Biology, 10117 Berlin, Germany
| | - Thomas Doerner
- Department of Medicine, Rheumatology and Clinical Immunology, Charité-University Medicine Berlin, 10117 Berlin, Germany
| | - Kristina Allers
- Medical Clinic I, Gastroenterology, Infectious Diseases and Rheumatology, Charité-University Medicine Berlin, 12203 Berlin, Germany
| | | | - Ralf Ignatius
- Institute for Microbiology and Hygiene, Charité-University Medicine Berlin, 12203 Berlin, Germany
| | - Thomas Schneider
- Medical Clinic I, Gastroenterology, Infectious Diseases and Rheumatology, Charité-University Medicine Berlin, 12203 Berlin, Germany
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20
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Online screening of nitric oxide scavengers in natural products using high performance liquid chromatography coupled with tandem diode array and fluorescence detection. J Chromatogr A 2015; 1425:106-15. [DOI: 10.1016/j.chroma.2015.10.095] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 10/27/2015] [Accepted: 10/27/2015] [Indexed: 12/24/2022]
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21
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Wang L, Shen C, Liu H, Wang S, Chen X, Roman RJ, Juncos LA, Lu Y, Wei J, Zhang J, Yip KP, Liu R. Shear stress blunts tubuloglomerular feedback partially mediated by primary cilia and nitric oxide at the macula densa. Am J Physiol Regul Integr Comp Physiol 2015; 309:R757-66. [PMID: 26269519 PMCID: PMC4666931 DOI: 10.1152/ajpregu.00173.2015] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 08/05/2015] [Indexed: 02/04/2023]
Abstract
The present study tested whether primary cilia on macula densa serve as a flow sensor to enhance nitric oxide synthase 1 (NOS1) activity and inhibit tubuloglomerular feedback (TGF). Isolated perfused macula densa was loaded with calcein red and 4,5-diaminofluorescein diacetate to monitor cell volume and nitric oxide (NO) generation. An increase in tubular flow rate from 0 to 40 nl/min enhanced NO production by 40.0 ± 1.2%. The flow-induced NO generation was blocked by an inhibitor of NOS1 but not by inhibition of the Na/K/2Cl cotransporter or the removal of electrolytes from the perfusate. NO generation increased from 174.8 ± 21 to 276.1 ± 24 units/min in cultured MMDD1 cells when shear stress was increased from 0.5 to 5.0 dynes/cm(2). The shear stress-induced NO generation was abolished in MMDD1 cells in which the cilia were disrupted using a siRNA to ift88. Increasing the NaCl concentration of the tubular perfusate from 10 to 80 mM NaCl in the isolated perfused juxtaglomerular preparation reduced the diameter of the afferent arteriole by 3.8 ± 0.1 μm. This response was significantly blunted to 2.5 ± 0.2 μm when dextran was added to the perfusate to increase the viscosity and shear stress. Inhibition of NOS1 blocked the effect of dextran on TGF response. In vitro, the effects of raising perfusate viscosity with dextran on tubular hydraulic pressure were minimized by reducing the outflow resistance to avoid stretching of tubular cells. These results suggest that shear stress stimulates primary cilia on the macula densa to enhance NO generation and inhibit TGF responsiveness.
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Affiliation(s)
- Lei Wang
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida
| | - Chunyu Shen
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida; Department of Forensic Pathology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; and
| | - Haifeng Liu
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida
| | - Shaohui Wang
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida
| | - Xinshan Chen
- Department of Forensic Pathology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; and
| | - Richard J Roman
- Department of Physiology/Pharmacology, University of Mississippi Medical Center, Jackson Mississippi
| | - Luis A Juncos
- Department of Physiology/Pharmacology, University of Mississippi Medical Center, Jackson Mississippi
| | - Yan Lu
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida; Department of Physiology/Pharmacology, University of Mississippi Medical Center, Jackson Mississippi
| | - Jin Wei
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida
| | - Jie Zhang
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida
| | - Kay-Pong Yip
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida
| | - Ruisheng Liu
- Department of Molecular Pharmacology and Physiology, University of South Florida College of Medicine, Tampa, Florida;
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22
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Juárez LA, Barba-Bon A, Costero AM, Martínez-Máñez R, Sancenón F, Parra M, Gaviña P, Terencio MC, Alcaraz MJ. A Boron Dipyrromethene (BODIPY)-Based CuII-Bipyridine Complex for Highly Selective NO Detection. Chemistry 2015; 21:15486-90. [DOI: 10.1002/chem.201502191] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Indexed: 01/13/2023]
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23
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Martí A, Costero AM, Gaviña P, Parra M. Selective colorimetric NO(g) detection based on the use of modified gold nanoparticles using click chemistry. Chem Commun (Camb) 2015; 51:3077-9. [DOI: 10.1039/c4cc10149a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new colorimetric probe for the detection of NO(g) based on the use of functionalized gold nanoparticles is described. The sensing protocol is based on a click reaction catalized by Cu(i) which is generated in situ from the reduction of Cu(ii) by NO(g).
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Affiliation(s)
- Almudena Martí
- Centro de Reconocimiento Molecular y Desarrollo Tecnológico (IDM)
- Unidad Mixta Universidad de Valencia-Universidad Politécnica de Valencia
- Dr. Moliner
- 50
- 46100 Burjassot
| | - Ana M. Costero
- Centro de Reconocimiento Molecular y Desarrollo Tecnológico (IDM)
- Unidad Mixta Universidad de Valencia-Universidad Politécnica de Valencia
- Dr. Moliner
- 50
- 46100 Burjassot
| | - Pablo Gaviña
- Centro de Reconocimiento Molecular y Desarrollo Tecnológico (IDM)
- Unidad Mixta Universidad de Valencia-Universidad Politécnica de Valencia
- Dr. Moliner
- 50
- 46100 Burjassot
| | - Margarita Parra
- Centro de Reconocimiento Molecular y Desarrollo Tecnológico (IDM)
- Unidad Mixta Universidad de Valencia-Universidad Politécnica de Valencia
- Dr. Moliner
- 50
- 46100 Burjassot
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24
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Sarkar A, Karmakar S, Bhattacharyya S, Purkait K, Mukherjee A. Nitric oxide release by N-(2-chloroethyl)-N-nitrosoureas: a rarely discussed mechanistic path towards their anticancer activity. RSC Adv 2015. [DOI: 10.1039/c4ra11137k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Our work shows that NO release is a feasible pathway of action for aromatic and heterocyclic N-(2-chloroethyl)-N-nitrosoureas and faster NO release may not lead to higher cytotoxicity.
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Affiliation(s)
- Amrita Sarkar
- Department of Chemical Sciences
- Indian Institute of Science Education & Research Kolkata
- Nadia
- India
| | - Subhendu Karmakar
- Department of Chemical Sciences
- Indian Institute of Science Education & Research Kolkata
- Nadia
- India
| | - Sudipta Bhattacharyya
- Department of Chemical Sciences
- Indian Institute of Science Education & Research Kolkata
- Nadia
- India
| | - Kallol Purkait
- Department of Chemical Sciences
- Indian Institute of Science Education & Research Kolkata
- Nadia
- India
| | - Arindam Mukherjee
- Department of Chemical Sciences
- Indian Institute of Science Education & Research Kolkata
- Nadia
- India
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25
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Maalcke WJ, Dietl A, Marritt SJ, Butt JN, Jetten MSM, Keltjens JT, Barends TRM, Kartal B. Structural basis of biological NO generation by octaheme oxidoreductases. J Biol Chem 2013; 289:1228-42. [PMID: 24302732 DOI: 10.1074/jbc.m113.525147] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Nitric oxide is an important molecule in all domains of life with significant biological functions in both pro- and eukaryotes. Anaerobic ammonium-oxidizing (anammox) bacteria that contribute substantially to the release of fixed nitrogen into the atmosphere use the oxidizing power of NO to activate inert ammonium into hydrazine (N2H4). Here, we describe an enzyme from the anammox bacterium Kuenenia stuttgartiensis that uses a novel pathway to make NO from hydroxylamine. This new enzyme is related to octaheme hydroxylamine oxidoreductase, a key protein in aerobic ammonium-oxidizing bacteria. By a multiphasic approach including the determination of the crystal structure of the K. stuttgartiensis enzyme at 1.8 Å resolution and refinement and reassessment of the hydroxylamine oxidoreductase structure from Nitrosomonas europaea, both in the presence and absence of their substrates, we propose a model for NO formation by the K. stuttgartiensis enzyme. Our results expand the understanding of the functions that the widespread family of octaheme proteins have.
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Affiliation(s)
- Wouter J Maalcke
- From the Department of Microbiology, Institute for Water and Wetland Research, Radboud University Nijmegen, 6525AJ Nijmegen, The Netherlands
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26
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Catalá M, Gasulla F, Pradas Del Real AE, García-Breijo F, Reig-Armiñana J, Barreno E. The organic air pollutant cumene hydroperoxide interferes with NO antioxidant role in rehydrating lichen. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2013; 179:277-284. [PMID: 23707950 DOI: 10.1016/j.envpol.2013.04.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 04/08/2013] [Accepted: 04/09/2013] [Indexed: 06/02/2023]
Abstract
Organic pollutants effects on lichens have not been addressed. Rehydration is critical for lichens, a burst of free radicals involving NO occurs. Repeated dehydrations with organic pollutants could increase oxidative damage. Our aim is to learn the effects of cumene hydroperoxide (CP) during lichen rehydration using Ramalina farinacea (L.) Ach., its photobiont Trebouxia spp. and Asterochloris erici. Confocal imaging shows intracellular ROS and NO production within myco and phycobionts, being the chloroplast the main source of free radicals. CP increases ROS, NO and lipid peroxidation and reduces chlorophyll autofluorescence, although photosynthesis remains unaffected. Concomitant NO inhibition provokes a generalized increase of ROS and a decrease in photosynthesis. Our results suggest that CP induces a compensatory hormetic response in Ramalina farinacea that could reduce the lichen's antioxidant resources after repeated desiccation-rehydration cycles. NO is important in the protection from CP.
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Affiliation(s)
- M Catalá
- Biología Celular, Dept Biología y Geología, ESCET, Dptal 1, 241, ESCET-Campus de Móstoles, c/Tulipán s/n, E-28933 Móstoles, Madrid, Spain.
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27
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Leal AK, Mitchell JH, Smith SA. Treatment of muscle mechanoreflex dysfunction in hypertension: effects of L-arginine dialysis in the nucleus tractus solitarii. Exp Physiol 2013; 98:1337-48. [PMID: 23771911 DOI: 10.1113/expphysiol.2012.071563] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
NEW FINDINGS What is the central question of this study? Does increasing NO production within the nucleus tractus solitarii (NTS) affect mechanoreflex function in normotensive and hypertensive rats?What is the main finding and its importance? Dialysis of 1 μm l-arginine, an NO precursor, within the NTS significantly attenuated the pressor response to muscle stretch in normotensive and hypertensive rats. In contrast, 10 μm l-arginine had no effect in normotensive animals, while increasing and decreasing the pressor and tachycardic responses to stretch, respectively, in hypertensive rats. This suggests that increasing NO within the NTS using lower doses of l-arginine can partly normalize mechanoreflex overactivity in hypertensive rats, whereas the effects of larger doses are equivocal. The blood pressure response to exercise is exaggerated in hypertension. Recent evidence suggests that an overactive skeletal muscle mechanoreflex contributes significantly to this augmented circulatory responsiveness. Sensory information from the mechanoreflex is processed within the nucleus tractus solitarii (NTS) of the medulla oblongata. Normally, endogenously produced nitric oxide within the NTS attenuates the increase in mean arterial pressure (MAP) induced by mechanoreflex stimulation. Thus, it has been suggested that decreases in NO production in the NTS underlie the generation of mechanoreflex dysfunction in hypertension. Supporting this postulate, it has been shown that blocking NO production within the NTS of normotensive rats reproduces the exaggerated pressor response elicited by mechanoreflex activation in hypertensive animals. What is not known is whether increasing NO production within the NTS of hypertensive rats mitigates mechanoreflex overactivity. In this study, the mechanoreflex was selectively activated by passively stretching hindlimb muscle before and after the dialysis of 1 and 10 μm l-arginine (an NO precursor) within the NTS of decerebrate normotensive Wistar-Kyoto (WKY) rats and spontaneously hypertensive rats (SHRs). Stretch induced larger elevations in MAP in SHRs compared with WKY rats. In both groups, dialysis of 1 μm l-arginine significantly attenuated the pressor response to stretch. However, at the 10 μm dose, l-arginine had no effect on the MAP response to stretch in WKY rats, while it enhanced the response in SHRs. The data demonstrate that increasing NO availability within the NTS using lower doses of l-arginine partly normalizes mechanoreflex dysfunction in hypertension, whereas higher doses do not. The findings could prove valuable in the development of treatment options for mechanoreflex overactivity in this disease.
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Affiliation(s)
- Anna K Leal
- Department of Bioengineering, University of Texas Southwestern Medical Center, Dallas, TX 75390-9174, USA
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28
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Liu X, Zweier JL. Application of Electrode Methods in Studies of Nitric Oxide Metabolism and Diffusion Kinetics. J Electroanal Chem (Lausanne) 2013; 688:32-39. [PMID: 23730264 DOI: 10.1016/j.jelechem.2012.09.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nitric oxide (NO) has many important physiological roles in the body. Since NO electrodes can directly measure NO concentration in the nM range and in real time, NO electrode methods have been generally used in laboratories for measuring NO concentration in vivo and in vitro. This review focuses on the application of electrode methods in studies of NO diffusion and metabolic kinetics. We have described the physical and chemical properties that need to be considered in the preparation of NO stock solution, discussed the effect of several interfering factors on the measured curves of NO concentration that need to be eliminated in the experimental setup for NO measurements, and provided an overview of the application of NO electrode methods in measuring NO diffusion and metabolic kinetics in solution and in biological systems. This overview covers NO metabolism by oxygen (O2), superoxide, heme proteins, cells and tissues. Important conclusions and physiological implication of these studies are discussed.
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Affiliation(s)
- Xiaoping Liu
- Davis Heart and Lung Research Institute, Department of Internal Medicine, The Ohio State University College of Medicine, 473 West 12th Avenue, Columbus, OH 43210, USA
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29
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Namin SM, Nofallah S, Joshi MS, Kavallieratos K, Tsoukias NM. Kinetic analysis of DAF-FM activation by NO: toward calibration of a NO-sensitive fluorescent dye. Nitric Oxide 2012; 28:39-46. [PMID: 23063986 DOI: 10.1016/j.niox.2012.10.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 08/31/2012] [Accepted: 10/01/2012] [Indexed: 11/29/2022]
Abstract
Nitric oxide (NO) research in biomedicine has been hampered by the absence of a method that will allow quantitative measurement of NO in biological tissues with high sensitivity and selectivity, and with adequate spatial and temporal resolution. 4-amino-5-methylamino-2',7'-difluorofluorescein (DAF-FM) is a NO sensitive fluorescence probe that has been used widely for qualitative assessment of cellular NO production. However, calibration of the fluorescent signal and quantification of NO concentration in cells and tissues using fluorescent probes, have provided significant challenge. In this study we utilize a combination of mathematical modeling and experimentation to elucidate the kinetics of NO/DAF-FM reaction in solution. Modeling and experiments suggest that the slope of fluorescent intensity (FI) can be related to NO concentration according to the equation: ddtFI=2αk(1)NO(2)O(2)DAF-FMkNO+DAF-FM where α is a proportionality coefficient that relates FI to unit concentration of activated DAF-FM, k(1) is the NO oxidation rate constant, and k was estimated to be 4.3±0.6. The FI slope exhibits saturation kinetics with DAF-FM concentration. Interestingly, the effective half-maximum constant (EC(50)) increases proportionally to NO concentration. This result is not in agreement with the proposition that N(2)O(3) is the NO oxidation byproduct that activates DAF-FM. Kinetic analysis suggests that the reactive intermediate should exhibit NO-dependent consumption and thus NO(2)() is a more likely candidate. The derived rate law can be used for the calibration of DAF-FM fluorescence and the quantification of NO concentration in biological tissues.
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Affiliation(s)
- Shabnam M Namin
- Department of Biomedical Engineering, Florida International University, 10555 W. Flagler Street, Miami, FL 33174, USA
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30
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Effect of cervical spinal cord electrical stimulation on nitric oxide levels in brain and dermal tissues: an evaluation using by real-time nitric oxide measurement. Acta Neurochir (Wien) 2012; 154:1641-6. [PMID: 22454038 DOI: 10.1007/s00701-012-1331-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Accepted: 03/12/2012] [Indexed: 10/28/2022]
Abstract
OBJECTIVE Nitric oxide synthesized from L: -arginine via the nitric oxide synthase enzyme family is the main regulatory molecule in many physiological systems. The level of nitric oxide can now be measured in tissues by a direct real-time amperometric method. The effect of electrical stimulation of the upper cervical spine on the arteries that supply the brain and upper extremities has been established by experimental studies, and thus it has begun to be used in clinical practice to increase blood flow in the brain and the peripheral vascular system. The mechanism of this effect is still a subject of research. This is the first report of real-time nitric oxide measurement in living brain and dermal tissue during electrical stimulation of the upper cervical spine. METHODS Using the amperometric method, nitric oxide levels in frontal subcortical and front foot skin were measured before, during and after electrical stimulation of the upper cervical spine in three groups of rabbits that received infusions of saline solution, 7-aminoguanidine or atropine. RESULTS By electrical stimulation, tissue nitric oxide levels increased significantly and remained increased during stimulation in the brain and skin. The nitric oxide levels dropped back to normal value 1 min after stimulation was turned off. CONCLUSION The results we obtained have showed that real-time nitric oxide could also be measured by an amperometric method in living tissues like brain. The effect of stimulation on nitric oxide levels of living tissues disappears immediately when the stimulation is turned off.
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31
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Molecular mechanism of anaerobic ammonium oxidation. Nature 2011; 479:127-30. [DOI: 10.1038/nature10453] [Citation(s) in RCA: 562] [Impact Index Per Article: 43.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Accepted: 08/12/2011] [Indexed: 11/08/2022]
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32
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Marín MJ, Thomas P, Fabregat V, Luis SV, Russell DA, Galindo F. Fluorescence of 1,2-diaminoanthraquinone and its nitric oxide reaction product within macrophage cells. Chembiochem 2011; 12:2471-7. [PMID: 21953703 DOI: 10.1002/cbic.201100371] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Indexed: 11/09/2022]
Abstract
Nitric oxide (NO) is involved in many biological processes. Aromatic ortho-diamine derivatives are commonly used in the fluorescence imaging of NO in living cells. ortho-diamino (o-diamino) compounds are believed to react with NO in an oxygenated medium leading to the formation of a triazole derivative. One such o-diamino compound, 1,2-diaminoanthraquinone (DAA), is a nontoxic probe for the detection of NO in living tissues and cells. The formation of the DAA triazole derivative (DAA-TZ) upon reaction of DAA with NO/O(2) within cells has not been demonstrated previously. The aim of this study was to confirm that DAA-TZ is the species formed intracellularly when DAA reacts with NO in the presence of oxygen. The chemical synthesis and characterisation of DAA-TZ was performed together with intracellular studies of DAA and DAA-TZ. Raw 264.7 macrophages were loaded with the DAA or DAA-TZ under conditions of no-stimulation or stimulation with interferon-γ and lipopolysaccharide to produce NO. Confocal microscopy was used to image the DAA-loaded macrophage cells. Analysis of the emission spectra allowed precise discrimination of the fluorescence of each species in the macrophage cells, and confirmed the identity of DAA-TZ as the intracellular reaction product between DAA and NO in the presence of oxygen.
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Affiliation(s)
- María J Marín
- School of Chemistry, University of East Anglia, Norwich, Norfolk, UK
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33
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Hippocampal neuronal nitric oxide synthase mediates the stress-related depressive behaviors of glucocorticoids by downregulating glucocorticoid receptor. J Neurosci 2011; 31:7579-90. [PMID: 21613472 DOI: 10.1523/jneurosci.0004-11.2011] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The molecular mechanisms underlying the behavioral effects of glucocorticoids are poorly understood. We report here that hippocampal neuronal nitric oxide synthase (nNOS) is a crucial mediator. Chronic mild stress and glucocorticoids exposures caused hippocampal nNOS overexpression via activating mineralocorticoid receptor. In turn, hippocampal nNOS-derived nitric oxide (NO) significantly downregulated local glucocorticoid receptor expression through both soluble guanylate cyclase (sGC)/cGMP and peroxynitrite (ONOO(-))/extracellular signal-regulated kinase signal pathways, and therefore elevated hypothalamic corticotrophin-releasing factor, a peptide that governs the hypothalamic-pituitary-adrenal axis. More importantly, nNOS deletion or intrahippocampal nNOS inhibition and NO-cGMP signaling blockade (using NO scavenger or sGC inhibitor) prevented the corticosterone-induced behavioral modifications, suggesting that hippocampal nNOS is necessary for the role of glucocorticoids in mediating depressive behaviors. In addition, directly delivering ONOO(-) donor into hippocampus caused depressive-like behaviors. Our findings reveal a role of hippocampal nNOS in regulating the behavioral effects of glucocorticoids.
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Giliano NY, Konevega LV, Noskin LA, Serezhenkov VA, Poltorakov AP, Vanin AF. Dinitrosyl iron complexes with thiol-containing ligands and apoptosis: studies with HeLa cell cultures. Nitric Oxide 2011; 24:151-9. [PMID: 21354319 DOI: 10.1016/j.niox.2011.02.005] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2010] [Revised: 11/12/2010] [Accepted: 02/20/2011] [Indexed: 12/28/2022]
Abstract
No pro-apoptotic effect of dinitrosyl iron complexes (DNIC) with glutathione, cysteine or thiosulfate was established after incubation of HeLa cells in Eagle's medium. However, DNIC with thiosulfate manifested pro-apoptotic activity during incubation of HeLa cells in Versene's solution supplemented with ethylene diamine tetraacetate (EDTA) known to induce the decomposition of these DNIC. The water-soluble о-phenanthroline derivative bathophenanthroline disulfonate (BPDS) had a similar effect on DNIC with glutathione during incubation of HeLa cells in Eagle's medium. It was assumed that EDTA- or BPDS-induced pro-apoptotic effect of DNIC with thiosulfate or glutathione is coupled with the ability of decomposing DNIC to initiate S-nitrosylation of proteins localized on the surface of HeLa cells. Presumably, the pro-apoptotic effect of S-nitrosoglutathione (GS-NO) on HeLa cells preincubated in Eagle's medium is mediated by the same mechanism, although the pro-apoptotic effect based on the ability of GS-NO to initiate the release of significant amounts of NO and its oxidation to cytotoxic peroxynitrite in a reaction with superoxide should not be ruled out either. No apoptotic activity was found in the presence of bivalent iron and glutathione favoring the conversion of GS-NO into DNIC with glutathione. It is suggested that interaction of HeLa cells with intact DNIC with glutathione or thiosulfate results in the formation of DNIC bound to cell surface proteins.
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Affiliation(s)
- Nadezhda Ya Giliano
- Department of Biology, Konstantinov Saint-Petersburg Institute of Nuclear Physics, Gatchina, Russia
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35
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Miguel MG. Antioxidant and anti-inflammatory activities of essential oils: a short review. Molecules 2010; 15:9252-87. [PMID: 21160452 PMCID: PMC6259136 DOI: 10.3390/molecules15129252] [Citation(s) in RCA: 412] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2010] [Revised: 12/09/2010] [Accepted: 12/13/2010] [Indexed: 11/17/2022] Open
Abstract
Essential oils are complex mixtures isolated from aromatic plants which may possess antioxidant and anti-inflammatory activities of interest in thye food and cosmetic industries as well as in the human health field. In this work, a review was done on the most recent publications concerning their antioxidant and anti-inflammatory activities. At the same time a survey of the methods generally used for the evaluation of antioxidant activity and some of the mechanisms involved in the anti-inflammatory activities of essential oils are also reported.
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Affiliation(s)
- Maria Graça Miguel
- Faculdade de Ciências e Tecnologia, Universidade do Algarve, IBB, Centro de Biotecnologia Vegetal, Ed. 8, Campus de Gambelas, 8005-139 Faro, Portugal.
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Zhang J, Boghossian AA, Barone PW, Rwei A, Kim JH, Lin D, Heller DA, Hilmer AJ, Nair N, Reuel NF, Strano MS. Single molecule detection of nitric oxide enabled by d(AT)15 DNA adsorbed to near infrared fluorescent single-walled carbon nanotubes. J Am Chem Soc 2010; 133:567-81. [PMID: 21142158 DOI: 10.1021/ja1084942] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We report the selective detection of single nitric oxide (NO) molecules using a specific DNA sequence of d(AT)(15) oligonucleotides, adsorbed to an array of near-infrared fluorescent semiconducting single-walled carbon nanotubes (AT(15)-SWNT). While SWNT suspended with eight other variant DNA sequences show fluorescence quenching or enhancement from analytes such as dopamine, NADH, L-ascorbic acid, and riboflavin, d(AT)(15) imparts SWNT with a distinct selectivity toward NO. In contrast, the electrostatically neutral polyvinyl alcohol enables no response to nitric oxide, but exhibits fluorescent enhancement to other molecules in the tested library. For AT(15)-SWNT, a stepwise fluorescence decrease is observed when the nanotubes are exposed to NO, reporting the dynamics of single-molecule NO adsorption via SWNT exciton quenching. We describe these quenching traces using a birth-and-death Markov model, and the maximum likelihood estimator of adsorption and desorption rates of NO is derived. Applying the method to simulated traces indicates that the resulting error in the estimated rate constants is less than 5% under our experimental conditions, allowing for calibration using a series of NO concentrations. As expected, the adsorption rate is found to be linearly proportional to NO concentration, and the intrinsic single-site NO adsorption rate constant is 0.001 s(-1) μM NO(-1). The ability to detect nitric oxide quantitatively at the single-molecule level may find applications in new cellular assays for the study of nitric oxide carcinogenesis and chemical signaling, as well as medical diagnostics for inflammation.
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Affiliation(s)
- Jingqing Zhang
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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37
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Endothelial nitric oxide production and transport in flow chambers: The importance of convection. Ann Biomed Eng 2010; 38:2805-16. [PMID: 20390451 DOI: 10.1007/s10439-010-0039-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2010] [Accepted: 04/05/2010] [Indexed: 10/19/2022]
Abstract
A computational model of Nitric Oxide (NO) production and transport within a parallel-plate flow chamber coated with endothelial cells is presented. The relationship between NO concentration and Wall Shear Stress (WSS) at the endothelium is investigated in detail. An increase in WSS is associated with two phenomena: enhanced NO production by the endothelial cells, and an increase in the velocity at which NO is convected out of the chamber. These two phenomena have opposite effects on endothelial NO concentration. In physiologically realistic cases, the balance between them is found to vary as WSS is raised, resulting in a complex non-monotonic dependence of endothelial NO concentration on WSS. Also, it is found that a NO concentration boundary layer develops within the chamber, leading to substantial spatial variations in NO concentration along the length of the device. Finally, the implications of a negative feedback mechanism (that affects NO production) are presented. The results emphasize the role of convection on NO transport within flow chambers, which has been overlooked or misinterpreted in most previous theoretical studies. It is hoped that the conclusions of this study can be used to aid accurate interpretation of related experimental data.
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Catalá M, Gasulla F, Pradas del Real AE, García-Breijo F, Reig-Armiñana J, Barreno E. Fungal-associated NO is involved in the regulation of oxidative stress during rehydration in lichen symbiosis. BMC Microbiol 2010; 10:297. [PMID: 21092214 PMCID: PMC3003266 DOI: 10.1186/1471-2180-10-297] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2010] [Accepted: 11/22/2010] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Reactive oxygen species (ROS) are normally produced in respiratory and photosynthetic electron chains and their production is enhanced during desiccation/rehydration. Nitric oxide (NO) is a ubiquitous and multifaceted molecule involved in cell signaling and abiotic stress. Lichens are poikilohydrous organisms that can survive continuous cycles of desiccation and rehydration. Although the production of ROS and NO was recently demonstrated during lichen rehydration, the functions of these compounds are unknown. The aim of this study was to analyze the role of NO during rehydration of the lichen Ramalina farinacea (L.) Ach., its isolated photobiont partner Trebouxia sp. and Asterochloris erici (Ahmadjian) Skaloud et Peksa (SAG 32.85 = UTEX 911). RESULTS Rehydration of R. farinacea caused the release of ROS and NO evidenced by the fluorescent probes DCFH₂-DA and DAN respectively. However, a minimum in lipid peroxidation (MDA) was observed 2 h post-rehydration. The inhibition of NO in lichen thalli with c-PTIO resulted in increases in both ROS production and lipid peroxidation, which now peaked at 3 h, together with decreases in chlorophyll autofluorescence and algal photobleaching upon confocal laser incidence. Trebouxia sp. photobionts generate peaks of NO-endproducts in suspension and show high rates of photobleaching and ROS production under NO inhibition which also caused a significant decrease in photosynthetic activity of A. erici axenic cultures, probably due to the higher levels of photo-oxidative stress. CONCLUSIONS Mycobiont derived NO has an important role in the regulation of oxidative stress and in the photo-oxidative protection of photobionts in lichen thalli. The results point to the importance of NO in the early stages of lichen rehydration.
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Affiliation(s)
- Myriam Catalá
- Universidad Rey Juan Carlos, Biología Celular, Dpto. Biología y Geología, (ESCET), Madrid, Spain
| | - Francisco Gasulla
- Universitat de València, Botánica & ICBIBE-Jardí Botànic, Fac. CC. Biológicas, C/Dr. Moliner 50. 46100-Burjassot. Valencia, Spain
| | - Ana E Pradas del Real
- Universidad Rey Juan Carlos, Biología Celular, Dpto. Biología y Geología, (ESCET), Madrid, Spain
| | - Francisco García-Breijo
- Universitat de València, Botánica & ICBIBE-Jardí Botànic, Fac. CC. Biológicas, C/Dr. Moliner 50. 46100-Burjassot. Valencia, Spain
- U. Politécnica de Valencia. Dpto. Ecosistemas Agroforestales. Camino de Vera s/n. 46022-Valencia, Spain
| | - Jose Reig-Armiñana
- Universitat de València, Botánica & ICBIBE-Jardí Botànic, Fac. CC. Biológicas, C/Dr. Moliner 50. 46100-Burjassot. Valencia, Spain
| | - Eva Barreno
- Universitat de València, Botánica & ICBIBE-Jardí Botànic, Fac. CC. Biológicas, C/Dr. Moliner 50. 46100-Burjassot. Valencia, Spain
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Luo CX, Jin X, Cao CC, Zhu MM, Wang B, Chang L, Zhou QG, Wu HY, Zhu DY. BIdirectional Regulation of Neurogenesis by Neuronal Nitric Oxide Synthase Derived from Neurons and Neural Stem Cells. Stem Cells 2010; 28:2041-52. [DOI: 10.1002/stem.522] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Giliano NY, Konevega LV, Noskin LA. Dynamics of Intracellular Superoxide and NO Content in Human Endotheliocytes and Carcinoma Cells after Treatment with NO Synthase Inhibitors. Bull Exp Biol Med 2010; 149:78-81. [DOI: 10.1007/s10517-010-0880-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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41
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Woldman YY, Sun J, Zweier JL, Khramtsov VV. Direct chemiluminescence detection of nitric oxide in aqueous solutions using the natural nitric oxide target soluble guanylyl cyclase. Free Radic Biol Med 2009; 47:1339-45. [PMID: 19751819 PMCID: PMC2784612 DOI: 10.1016/j.freeradbiomed.2009.09.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2009] [Revised: 08/30/2009] [Accepted: 09/06/2009] [Indexed: 01/14/2023]
Abstract
Nitric oxide (NO) is a free radical involved in many physiological processes including regulation of blood pressure, immune response, and neurotransmission. However, the measurement of extremely low, in some cases subnanomolar, physiological concentrations of nitric oxide presents an analytical challenge. The purpose of this methods article is to introduce a new highly sensitive chemiluminescence approach to direct NO detection in aqueous solutions using a natural nitric oxide target, soluble guanylyl cyclase (sGC), which catalyzes the conversion of guanosine triphosphate to guanosine 3',5'-cyclic monophosphate and inorganic pyrophosphate. The suggested enzymatic assay uses the fact that the rate of the reaction increases by about 200 times when NO binds with sGC and, in so doing, provides a sensor for nitric oxide. Luminescence detection of the above reaction is accomplished by converting inorganic pyrophosphate into ATP with the help of ATP sulfurylase followed by light emission from the ATP-dependent luciferin-luciferase reaction. Detailed protocols for NO quantification in aqueous samples are provided. The examples of applications include measurement of NO generated by a nitric oxide donor (PAPA-NONOate), nitric oxide synthase, and NO gas dissolved in buffer. The method allows for the measurement of NO concentrations in the nanomolar range and NO generation rates as low as 100 pM/min.
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Affiliation(s)
- Yakov Y. Woldman
- Valdosta State University, Valdosta, GA 31698
- Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, 43210
| | - Jian Sun
- Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, 43210
| | - Jay L. Zweier
- Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, 43210
| | - Valery V. Khramtsov
- Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, 43210
- Corresponding author: Valery V. Khramtsov, Dorothy M. Davis Heart & Lung Research Institute, 201 HLRI, 473 W 12th Ave, The Ohio State University, Columbus, OH 43210; tel. (614)-688-3664; fax (614)-293-4799;
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Hong H, Sun J, Cai W. Multimodality imaging of nitric oxide and nitric oxide synthases. Free Radic Biol Med 2009; 47:684-98. [PMID: 19524664 DOI: 10.1016/j.freeradbiomed.2009.06.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2009] [Revised: 05/28/2009] [Accepted: 06/10/2009] [Indexed: 01/27/2023]
Abstract
Nitric oxide (NO) and NO synthases (NOSs) are crucial factors in many pathophysiological processes such as inflammation, vascular/neurological function, and many types of cancer. Noninvasive imaging of NO or NOS can provide new insights in understanding these diseases and facilitate the development of novel therapeutic strategies. In this review, we will summarize the current state-of-the-art multimodality imaging in detecting NO and NOSs, including optical (fluorescence, chemiluminescence, and bioluminescence), electron paramagnetic resonance (EPR), magnetic resonance (MR), and positron emission tomography (PET). With continued effort over the last several years, these noninvasive imaging techniques can now reveal the biodistribution of NO or NOS in living subjects with high fidelity which will greatly facilitate scientists/clinicians in the development of new drugs and/or patient management. Lastly, we will also discuss future directions/applications of NO/NOS imaging. Successful development of novel NO/NOS imaging agents with optimal in vivo stability and desirable pharmacokinetics for clinical translation will enable the maximum benefit in patient management.
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Affiliation(s)
- Hao Hong
- Department of Radiology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin 53705-2275, USA
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Endogenous nitric oxide is a key promoting factor for initiation of seizure-like events in hippocampal and entorhinal cortex slices. J Neurosci 2009; 29:8565-77. [PMID: 19571147 DOI: 10.1523/jneurosci.5698-08.2009] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nitric oxide (NO) modulates synaptic transmission, and its level is elevated during epileptic activity in animal models of epilepsy. However, the role of NO for development and maintenance of epileptic activity is controversial. We studied this aspect in rat organotypic hippocampal slice cultures and acute hippocampal-entorhinal cortex slices from wild-type and neuronal NO synthase (nNOS) knock-out mice combining electrophysiological and fluorescence imaging techniques. Slice cultures contained nNOS-positive neurons and an elaborated network of nNOS-positive fibers. Lowering of extracellular Mg(2+) concentration led to development of epileptiform activity and increased NO formation as revealed by NO-selective probes, 4-amino-5-methylamino-2',7'-difluorofluorescein and 1,2-diaminoanthraquinone sulfate. NO deprivation by NOS inhibitors and NO scavengers caused depression of both EPSCs and IPSCs and prevented initiation of seizure-like events (SLEs) in 75% of slice cultures and 100% of hippocampal-entorhinal cortex slices. This effect was independent of the guanylyl cyclase/cGMP pathway. Suppression of SLE initiation in acute slices from mice was achieved by both the broad-spectrum NOS inhibitor N-methyl-L-arginine acetate and the nNOS-selective inhibitor 7-nitroindazole, whereas inhibition of inducible NOS by aminoguanidine was ineffective, suggesting that nNOS activity was crucial for SLE initiation. Additional evidence was obtained from knock-out animals because SLEs developed in a significantly lower percentage of slices from nNOS(-/-) mice and showed different characteristics, such as prolongation of onset latency and higher variability of SLE intervals. We conclude that enhancement of synaptic transmission by NO under epileptic conditions represents a positive feedback mechanism for the initiation of seizure-like events.
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Liu S, Tran KK, Pan S, Shen H. Detecting and differentiating microbes by dendritic cells for the development of cell-based biosensors. Biosens Bioelectron 2009; 24:2598-603. [DOI: 10.1016/j.bios.2009.01.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2008] [Revised: 01/08/2009] [Accepted: 01/09/2009] [Indexed: 12/31/2022]
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Kodamatani H, Yamazaki S, Saito K, Amponsaa-Karikari A, Kishikawa N, Kuroda N, Tomiyasu T, Komatsu Y. Highly sensitive method for determination of N-nitrosamines using high-performance liquid chromatography with online UV irradiation and luminol chemiluminescence detection. J Chromatogr A 2009; 1216:92-8. [DOI: 10.1016/j.chroma.2008.11.025] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2008] [Revised: 11/01/2008] [Accepted: 11/13/2008] [Indexed: 10/21/2022]
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Use of diaminofluoresceins to detect and measure nitric oxide in low level generating human immune cells. J Immunol Methods 2008; 342:49-57. [PMID: 19109965 DOI: 10.1016/j.jim.2008.11.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2008] [Revised: 11/24/2008] [Accepted: 11/25/2008] [Indexed: 12/31/2022]
Abstract
Nitric oxide ((*)NO) has been implicated in multiple physiological and pathological immune processes. Different methods have been developed to detect and quantify (*)NO, where one of the principal difficulties are the accurately detection in cellular system with low levels of (*)NO production. The choice of the (*)NO detection method to be used depends on the characteristics of the experimental system and the levels of (*)NO production which depend on either the organism source of samples or the experimental conditions. Recently, high sensitive methods to detect and image (*)NO have been reported using 4,5-diaminofluorescein-based fluorescent probes (DAF) and its derivate 4,5-diaminofluorescein diacetate (DAF-2 DA). This work was aimed to adapt and optimize the use of DAF probes to detect and quantify the (*)NO production in systems of high, moderate and low out-put production, especially in human PBMC and their subpopulations. Here, we report an original experimental design which is useful to detect and estimate (*)NO fluxes in human PBMC and their subpopulations with high specificity and sensitivity.
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Hazarika S, Angelo M, Li Y, Aldrich AJ, Odronic SI, Yan Z, Stamler JS, Annex BH. Myocyte specific overexpression of myoglobin impairs angiogenesis after hind-limb ischemia. Arterioscler Thromb Vasc Biol 2008; 28:2144-50. [PMID: 18818418 DOI: 10.1161/atvbaha.108.170951] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE In preclinical models of peripheral arterial disease the angiogenic response is typically robust, though it can be impaired in conditions such as hypercholesterolemia and diabetes where the endothelium is dysfunctional. Myoglobin (Mb) is expressed exclusively in striated muscle cells. We hypothesized that myocyte specific overexpression of myoglobin attenuates ischemia-induced angiogenesis even in the presence of normal endothelium. METHODS AND RESULTS Mb overexpressing transgenic (MbTg, n=59) and wild-type (WT, n=56) C57Bl/6 mice underwent unilateral femoral artery ligation/excision. Perfusion recovery was monitored using Laser Doppler. Ischemia-induced changes in muscle were assessed by protein and immunohistochemistry assays. Nitrite/nitrate and protein-bound NO, and vasoreactivity was measured. Vasoreactivity was similar between MbTg and WT. In ischemic muscle, at d14 postligation, MbTg increased VEGF-A, and activated eNOS the same as WT mice but nitrate/nitrite were reduced whereas protein-bound NO was higher. MbTg had attenuated perfusion recovery at d21 (0.37+/-0.03 versus 0.47+/-0.02, P<0.05), d28 (0.40+/-0.03 versus 0.50+/-0.04, P<0.05), greater limb necrosis (65.2% versus 15%, P<0.001), a lower capillary density, and greater apoptosis versus WT. CONCLUSIONS Increased Mb expression in myocytes attenuates angiogenesis after hind-limb ischemia by binding NO and reducing its bioavailability. Myoglobin can modulate the angiogenic response to ischemia even in the setting of normal endothelium.
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Affiliation(s)
- Surovi Hazarika
- Division of Cardiology, Department of Medicine, Duke University Medical Center, Durham, NC, USA
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Klassen SS, Rabkin SW. The metalloporphyrin FeTPPS but not by cyclosporin A antagonizes the interaction of peroxynitrate and hydrogen peroxide on cardiomyocyte cell death. Naunyn Schmiedebergs Arch Pharmacol 2008; 379:149-61. [DOI: 10.1007/s00210-008-0342-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2008] [Accepted: 07/25/2008] [Indexed: 11/30/2022]
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49
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Yang Q, Zhang X, Bao X, Lu H, Zhang W, Wu W, Miao H, Jiao B. Single cell determination of nitric oxide release using capillary electrophoresis with laser-induced fluorescence detection. J Chromatogr A 2008; 1201:120-7. [DOI: 10.1016/j.chroma.2008.06.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2008] [Revised: 05/29/2008] [Accepted: 06/02/2008] [Indexed: 10/22/2022]
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50
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Novel fluorescence method for real-time monitoring of nitric oxide dynamics in nanoscale concentration. ACTA ACUST UNITED AC 2008; 70:1006-13. [DOI: 10.1016/j.jbbm.2007.09.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2007] [Revised: 09/19/2007] [Accepted: 09/30/2007] [Indexed: 11/20/2022]
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