1
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Patra DC, Mondal SP. Paper-based Electrochemical Sensor Integrated with Gold Nanoparticle-Decorated Carbon Cloth as a Working Electrode for Nitric Oxide Detection in Artificial Tears. ACS APPLIED BIO MATERIALS 2024. [PMID: 39010742 DOI: 10.1021/acsabm.4c00425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/17/2024]
Abstract
Nitric oxide (NO) in human tears regulates numerous ocular surface processes, such as tear generation, corneal wound healing, conjunctival vascular tone, and so forth. Any deviation from its normal concentration is linked to various ocular syndromes, including microbial keratitis, conjunctivitis, pterygium, dry eye, retinitis, glaucoma, and so forth. Therefore, precise monitoring of NO in tears can be considered as a potential biomarker for ocular diseases. Here, we report a highly sensitive and selective electrochemical NO sensor using carbon ink-based electrodes. Counter, working (WE), and reference electrodes have been designed and painted on a butter paper by using carbon ink. To improve the sensing performance, the WE has been modified with a gold nanoparticle (Au NP)-deposited carbon cloth (CC). Such a paper-based sensor demonstrated high sensitivity of ∼0.34 μA μM-1 cm-2, ultralow detection limit of ∼2.35 nM, wide linear range of 10 nM-0.4 mM, and fast response time (0.35 s). The sensor also showed excellent stability and selectivity toward the interfering agents in human body fluids. Such a low-cost, flexible paper-based sensor was employed for the detection of NO in artificial tears.
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Affiliation(s)
- Dulal Chandra Patra
- Department of Physics, National Institute of Technology, Agartala 799046, India
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2
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Xia X. Fabrication of CdS quantum dots with egg white and application in the assay of hypochlorous acid and myeloperoxidase activity and inhibition. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:4260-4267. [PMID: 37591805 DOI: 10.1039/d3ay01148h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
The myeloperoxidase (MPO)/H2O2-Cl- enzymatic reaction system and its product hypochlorous acid (HOCl) are closely related to many disease processes, and new methods to detect the levels of HOCl and MPO are being focused on. MPO is the only known enzyme for the catalytic production of HOCl in biological systems; therefore, monitoring the HOCl levels is a selective and direct readout of MPO activity. This study reported a simple and efficient fluorescence assay of HOCl and MPO activity and inhibition. Highly fluorescent CdS quantum dots (CdS QDs) were prepared in one pot where NaOH-pretreated egg white served as a stabilizer. These CdS QDs exhibit strong green emission centered at ca. 550 nm and enable rapid and selective fluorescence response to HOCl with a linear detection range of 8.0-250 μM and a limit of detection (LOD) of 2.5 μM. Moreover, the CdS QDs were further applied for sensing MPO based on the fluorescence quenching exerted by its reaction product HOCl. Detection of MPO is accomplished with a linear range from 0.1 to 40 mU mL-1 (1 U is the MPO concentration for catalysis of 1 micromolar substrate per minute) and a LOD of 0.06 mU mL-1. The developed synthesis method can be applied to large-scale synthesis of CdS QDs, and the strategy to sense HOCl and MPO activity and inhibition has potential biomedical applications such as clinical diagnosis and drug screening.
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Affiliation(s)
- Xiaodong Xia
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, 411201, PR China.
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3
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Dutta A, Maiti D, Katarkar A, Sasmal M, Khatun R, Moni D, Habibullah M, Ali M. N-Nitrosation Based Fluorescence Turn-On Nitric Oxide Probe: Kinetic and Cell Imaging Studies. ACS APPLIED BIO MATERIALS 2023; 6:3266-3277. [PMID: 37556766 DOI: 10.1021/acsabm.3c00362] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2023]
Abstract
Nitric oxide (NO) is a ubiquitous messenger molecule playing a key role in various physiological and pathological processes. However, producing a selective turn-on fluorescence response to NO is a challenging task due to (a) the very short half-life of NO (typically in the range of 0.1-10 s) in the biological milieu and (b) false positive responses to reactive carbonyl species (RCS) (e.g., dehydroascorbic acid and methylglyoxal etc.) and some other reactive oxygen/nitrogen species (ROS/RNS), especially with o-phenylenediamine (OPD) based fluorosensors. To avoid these limitations, NO sensors should be designed in such a way that they react spontaneously with NO to give turn-on response within the time frame of t1/2 (typically in the range of 0.1-10 s) of NO and λem in the visible wavelength along with good cell permeability to achieve biocompatibility. With these views in mind, a N-nitrosation based fluorescent sensor, NDAQ, has been developed that is highly selective to NO with ∼27-fold fluorescence enhancement at λem = 542 nm with high sensitivity (LOD = 7 ± 0.4 nM) and shorter response time, eliminating the interference of other reactive species (RCS/ROS/RNS). Furthermore, all the photophysical studies with NDAQ have been performed in 98% aqueous medium at physiological pH, indicating its good stability under physiological conditions. The kinetic assay illustrates the second-order dependency with respect to NO concentration and first-order dependency with respect to NDAQ concentration. The biological studies reveal the successful application of the probe to track both endogenous and exogenous NO in living organisms.
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Affiliation(s)
- Ananya Dutta
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Debjani Maiti
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Atul Katarkar
- Department of Biochemistry, University of Lausanne, Ch. des Boveresses 155, 1066 Epalinges, Switzerland
| | - Mihir Sasmal
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Rousunara Khatun
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
- Aliah University, ll-A/27, Action Area II, Newtown, Action Area II, Kolkata, West Bengal 700160, India
| | - Dolan Moni
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Mansur Habibullah
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Mahammad Ali
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
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4
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Engel JA, Pålsson E, Vallöf D, Jerlhag E. Ghrelin activates the mesolimbic dopamine system via nitric oxide associated mechanisms in the ventral tegmental area. Nitric Oxide 2023; 131:1-7. [PMID: 36513266 DOI: 10.1016/j.niox.2022.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 11/08/2022] [Accepted: 12/05/2022] [Indexed: 12/14/2022]
Abstract
Besides enhanced feeding, the orexigenic peptide ghrelin activates the mesolimbic dopamine system to cause reward as measured by locomotor stimulation, dopamine release in nucleus accumbens shell (NAcS), and conditioned place preference. Although the ventral tegmental area (VTA) appears to be a central brain region for this ghrelin-reward, the underlying mechanisms within this area are unknown. The findings that the gaseous neurotransmitter nitric oxide (NO) modulate the ghrelin enhanced feeding, led us to hypothesize that ghrelin increases NO levels in the VTA, and thereby stimulates reward-related behaviors. We initially demonstrated that inhibition of NO synthesis blocked the ghrelin-induced activation of the mesolimbic dopamine system. We then established that antagonism of downstream signaling of NO in the VTA, namely sGC, prevents the ability of ghrelin to stimulate the mesolimbic dopamine system. The association of ghrelin to NO was further strengthened by in vivo electrochemical recordings showing that ghrelin enhances the NO release in the VTA. Besides a GABAB -receptor agonist, known to reduce NO and cGMP, blocks the stimulatory properties of ghrelin. The present series of experiments reveal that ablated NO signaling, through pharmacologically inhibiting the production of NO and/or cGMP, prevents the ability of ghrelin to induced reward-related behaviors.
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Affiliation(s)
- Jörgen A Engel
- Institute of Neuroscience and Physiology, Department of Pharmacology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Erik Pålsson
- Institute of Neuroscience and Physiology, Department of Neurochemistry and Psychiatry, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Daniel Vallöf
- Institute of Neuroscience and Physiology, Department of Pharmacology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Elisabet Jerlhag
- Institute of Neuroscience and Physiology, Department of Pharmacology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden.
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5
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Zhou L, Liu C, Zheng Y, Huang Z, Zhang X, Xiao Y. Bio-orthogonal Toolbox for Monitoring Nitric Oxide in Targeted Organelles of Live Cells and Zebrafishes. Anal Chem 2022; 94:15678-15685. [DOI: 10.1021/acs.analchem.2c02768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Lin Zhou
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
| | - Chuanhao Liu
- School of Medicine, Engineering Research Centre of Molecular Medicine of Ministry of Education, Key Laboratory of Fujian Molecular Medicine, Huaqiao University, Quanzhou 362021, China
| | - Ying Zheng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
| | - Zhenlong Huang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
| | - Xinfu Zhang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
| | - Yi Xiao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
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6
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Electrochemical nitric oxide detection using gold deposited cobalt oxide nanostructures. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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Wang L, Zhang J, An X, Duan H. Recent progress on the organic and metal complex-based fluorescent probes for monitoring nitric oxide in living biological systems. Org Biomol Chem 2020; 18:1522-1549. [PMID: 31995085 DOI: 10.1039/c9ob02561h] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Nitric oxide (NO) is an important gaseous signaling molecule related to various human diseases. To investigate the biological functions of NO, many strategies have been developed for real-time monitoring the NO levels in biological systems. Among these strategies, fluorescent probes are considered to be one of the most efficient and applicable methods owing to their excellent sensitivity and selectivity, high spatiotemporal resolution, noninvasiveness, and experimental convenience. Therefore, great efforts have been paid to the design, synthesis, and fluorescence investigation of novel NO fluorescent probes in the past several years. However, few of them exhibit practical applications owing to the low concentration, short half-life, and rapid diffusion characteristics of NO in biological systems. Rational design of NO fluorescent probes with excellent selectivity and sensitivity, low cytotoxicity, long-lived fluorescent emission, and low background interference is still a challenge for scientists all over the word. To provide spatial-temporal information, this article focuses on the progress made in the organic and metal complex-based NO fluorescent probes during the past five years. The key structural elements and sensing mechanisms of NO fluorescent probes are discussed. Some novel ratiometric, luminescence, and photoacoustic probes with low background interference and deep tissue penetrating ability are mentioned. All these probes have been used for imaging exogenous and endogenous NO in cells and animal models. More importantly, this article also describes the development of multi-functional NO fluorescent probes, such as organelle targeting probes, dual-analysis probes, and probe-drug conjugates, which will inspire the design of various functional fluorescent probes.
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Affiliation(s)
- Lizhen Wang
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, Shandong Province, China. and Engineering Research Center of Zebrafish Models for Human Diseases and Drug Screening of Shandong Province, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, Shandong Province, China
| | - Juan Zhang
- Shandong Jinan Qilu Science Patent Office Ltd, Ji'nan 250014, Shandong Province, China
| | - Xue An
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Ji'nan 250300, Shandong Province, China.
| | - Hongdong Duan
- School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Ji'nan 250300, Shandong Province, China.
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8
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Reid CH, Finnerty NJ. An electrochemical investigation into the effects of local and systemic administrations of sodium nitroprusside in brain extracellular fluid of mice. Bioelectrochemistry 2019; 132:107441. [PMID: 31869701 DOI: 10.1016/j.bioelechem.2019.107441] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 12/03/2019] [Accepted: 12/05/2019] [Indexed: 01/25/2023]
Abstract
Sodium nitroprusside (SNP) is a nitric oxide (NO)-donor drug used clinically to treat severe hypertension, however, there are limitations associated with its mechanism of action that prevent widespread adoption. In particular, its impact on cerebral hemodynamics is controversial and direct evidence on its effects are lacking. Electrochemical methods provide an attractive option to undertake real time neurochemical measurements in situ using selective microsensors. Herein, we report the novel application of an existing platinum (Pt)-Nafion® sensor to measure the release of NO from SNP under in vitro and in vivo conditions. Initially, the temporal release of NO was measured and the effect of the reducing agent, ascorbic acid (AA), was elucidated in vitro. A combined microdialysis/NO sensor construct was implanted into the striatum of anaesthetised mice and the local perfusion of 10 mM SNP with/without AA resulted in increased NO concentration detected using the Pt-Nafion® sensor. Subsequently, the NO sensor, coupled with carbon paste electrodes (CPEs) for the electrochemical measurement of O2, were applied to investigate SNP effects in freely moving mice. A complex mechanism of action was identified that infers NO inhibition and biphasic O2 dynamics. The preliminary findings within support a strong cerebrovascular effect of systemic SNP administration that warrants careful consideration for clinical use.
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Affiliation(s)
- Caroline H Reid
- Chemistry Department, Maynooth University, Co. Kildare, Ireland
| | - Niall J Finnerty
- Chemistry Department, Maynooth University, Co. Kildare, Ireland.
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9
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Nishikawa Y, Miki T, Awa M, Kuwata K, Tamura T, Hamachi I. Development of a Nitric Oxide-Responsive Labeling Reagent for Proteome Analysis of Live Cells. ACS Chem Biol 2019; 14:397-404. [PMID: 30715847 DOI: 10.1021/acschembio.8b01021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Nitric oxide (NO) is a pleiotropic signaling molecule involved in the regulation of diverse physiological and pathophysiological mechanisms in cardiovascular, nervous, and immunological systems. To understand the biological functions of NO in detail, comprehensive characterization of proteins found in high-NO concentration environments is crucial. Herein, we describe the design of NO-responsive protein labeling reagents based on N-alkoxyacyl- o-phenylenediamine as an optimal reactive scaffold. The designed molecules can label proteins in murine macrophage cells in response to endogenously produced NO. The combination of NO-responsive protein labeling and liquid chromatography-tandem mass spectrometry technology allowed the characterization of the proteome under NO-generated conditions. Moreover, we demonstrated that our reagent was able to selectively mark and be used to fluorescently visualize NO-producing cells in a mixed cell culture system.
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Affiliation(s)
- Yuki Nishikawa
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Takayuki Miki
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Masashi Awa
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Keiko Kuwata
- Institute of Transformative Bio-Molecules (ITbM), Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Tomonori Tamura
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Itaru Hamachi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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10
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Characterisation of a novel coumarin-based fluorescent probe for monitoring nitric oxide production in macrophages. Bioorg Med Chem 2017; 25:5743-5748. [DOI: 10.1016/j.bmc.2017.08.054] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 08/24/2017] [Accepted: 08/30/2017] [Indexed: 12/31/2022]
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11
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Long Term Amperometric Recordings in the Brain Extracellular Fluid of Freely Moving Immunocompromised NOD SCID Mice. SENSORS 2017; 17:s17020419. [PMID: 28241417 PMCID: PMC5335951 DOI: 10.3390/s17020419] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 02/10/2017] [Accepted: 02/18/2017] [Indexed: 11/17/2022]
Abstract
We describe the in vivo characterization of microamperometric sensors for the real-time monitoring of nitric oxide (NO) and oxygen (O₂) in the striatum of immunocompromised NOD SCID mice. The latter strain has been utilized routinely in the establishment of humanized models of disease e.g., Parkinson's disease. NOD SCID mice were implanted with highly sensitive and selective NO and O₂ sensors that have been previously characterized both in vitro and in freely moving rats. Animals were systemically administered compounds that perturbed the amperometric current and confirmed sensor performance. Furthermore, the stability of the amperometric current was investigated and 24 h recordings examined. Saline injections caused transient changes in both currents that were not significant from baseline. l-NAME caused significant decreases in NO (p < 0.05) and O₂ (p < 0.001) currents compared to saline. l-Arginine produced a significant increase (p < 0.001) in NO current, and chloral hydrate and Diamox (acetazolamide) caused significant increases in O₂ signal (p < 0.01) compared against saline. The stability of both currents were confirmed over an eight-day period and analysis of 24-h recordings identified diurnal variations in both signals. These findings confirm the efficacy of the amperometric sensors to perform continuous and reliable recordings in immunocompromised mice.
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12
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Xu Q, Liu W, Li L, Zhou F, Zhou J, Tian Y. Ratiometric SERS imaging and selective biosensing of nitric oxide in live cells based on trisoctahedral gold nanostructures. Chem Commun (Camb) 2017; 53:1880-1883. [PMID: 28111649 DOI: 10.1039/c6cc09563a] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Herein, a ratiometric SERS probe was created for monitoring nitric oxide (NO) by designing a novel molecule, 3,4-diaminobenzene-thiol, and immobilizing this molecule onto trisoctahedral gold nanostructures with superior SERS capability. The established probe possessed good selectivity and biocompatibility, high sensitivity and accuracy, thus enabling imaging and biosensing of NO in live cells.
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Affiliation(s)
- Qiao Xu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Dongchuan Road 500, Shanghai 200241, P. R. China.
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13
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Elliott J, Duay J, Simoska O, Shear JB, Stevenson KJ. Gold Nanoparticle Modified Transparent Carbon Ultramicroelectrode Arrays for the Selective and Sensitive Electroanalytical Detection of Nitric Oxide. Anal Chem 2017; 89:1267-1274. [DOI: 10.1021/acs.analchem.6b03987] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Janine Elliott
- Department
of Chemistry, Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Jonathon Duay
- Department
of Chemistry, Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Olja Simoska
- Department
of Chemistry, Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Jason B. Shear
- Department
of Chemistry, Center for Nano- and Molecular Science and Technology, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Keith J. Stevenson
- Center
for Electrochemical Energy Storage, Skolkovo Institute of Science and Technology, Moscow 143026, Russia
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14
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Mahapatra AK, Ali SS, Maiti K, Mondal S, Maji R, Manna S, Manna SK, Uddin MR, Mandal S. Highly sensitive ratiometric fluorescence probes for nitric oxide based on dihydropyridine and potentially useful in bioimaging. RSC Adv 2016. [DOI: 10.1039/c6ra23139j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Hantzsch dihydropyridine-based ratiometric fluorescent NO probes, viz.PyNO and TPANO, were synthesized and characterized.
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Affiliation(s)
- Ajit Kumar Mahapatra
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Syed Samim Ali
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Kalipada Maiti
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Sanchita Mondal
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Rajkishor Maji
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Srimanta Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Saikat Kumar Manna
- Department of Chemistry
- Indian Institute of Engineering Science and Technology
- Howrah-711103
- India
| | - Md. Raihan Uddin
- Department of Microbiology
- University of Calcutta
- Kolkata-700019
- India
| | - Sukhendu Mandal
- Department of Microbiology
- University of Calcutta
- Kolkata-700019
- India
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15
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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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16
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Tian L, Dai Z, Liu X, Song B, Ye Z, Yuan J. Ratiometric Time-Gated Luminescence Probe for Nitric Oxide Based on an Apoferritin-Assembled Lanthanide Complex-Rhodamine Luminescence Resonance Energy Transfer System. Anal Chem 2015; 87:10878-85. [PMID: 26462065 DOI: 10.1021/acs.analchem.5b02347] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Using apoferritin (AFt) as a carrier, a novel ratiometric luminescence probe based on luminescence resonance energy transfer (LRET) between a Tb(3+) complex (PTTA-Tb(3+)) and a rhodamine derivative (Rh-NO), PTTA-Tb(3+)@AFt-Rh-NO, has been designed and prepared for the specific recognition and time-gated luminescence detection of nitric oxide (NO) in living samples. In this LRET probe, PTTA-Tb(3+) encapsulated in the core of AFt is the energy donor, and Rh-NO, a NO-responsive rhodamine derivative, bound on the surface of AFt is the energy acceptor. The probe only emits strong Tb(3+) luminescence because the emission of rhodamine is switched off in the absence of NO. Upon reaction with NO, accompanied by the turn-on of rhodamine emission, the LRET from Tb(3+) complex to rhodamine occurs, which results in the remarkable increase and decrease of the long-lived emissions of rhodamine and PTTA-Tb(3+), respectively. After the reaction, the intensity ratio of rhodamine emission to Tb(3+) emission, I565/I539, is ∼24.5-fold increased, and the dose-dependent enhancement of I565/I539 shows a good linearity in a wide concentration range of NO. This unique luminescence response allowed PTTA-Tb(3+)@AFt-Rh-NO to be conveniently used as a ratiometric probe for the time-gated luminescence detection of NO with I565/I539 as a signal. Taking advantages of high specificity and sensitivity of the probe as well as its good water-solubility, biocompatibility, and cell membrane permeability, PTTA-Tb(3+)@AFt-Rh-NO was successfully used for the luminescent imaging of NO in living cells and Daphnia magna. The results demonstrated the efficacy of the probe and highlighted it's advantages for the ratiometric time-gated luminescence bioimaging application.
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Affiliation(s)
- Lu Tian
- State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology , Dalian 116024, China
| | - Zhichao Dai
- State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology , Dalian 116024, China
| | - Xiangli Liu
- State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology , Dalian 116024, China
| | - Bo Song
- State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology , Dalian 116024, China
| | - Zhiqiang Ye
- State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology , Dalian 116024, China
| | - Jingli Yuan
- State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology , Dalian 116024, China
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17
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Barzegar Amiri Olia M, Schiesser CH, Taylor MK. New reagents for detecting free radicals and oxidative stress. Org Biomol Chem 2015; 12:6757-66. [PMID: 25053503 DOI: 10.1039/c4ob01172d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Free radicals and oxidative stress play important roles in the deterioration of materials, and free radicals are important intermediates in many biological processes. The ability to detect these reactive species is a key step on the road to their understanding and ultimate control. This short review highlights recent progress in the development of reagents for the detection of free radicals and reactive oxygen species with broad application to materials science as well as biology.
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18
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Wang J, Zhao Y, Wang C, Zhu Q, Du Z, Hu A, Yang Y. Organelle-Specific Nitric Oxide Detection in Living Cells via HaloTag Protein Labeling. PLoS One 2015; 10:e0123986. [PMID: 25923693 PMCID: PMC4414533 DOI: 10.1371/journal.pone.0123986] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 02/25/2015] [Indexed: 11/27/2022] Open
Abstract
Nitric oxide (NO) is a membrane-permeable signaling molecule that is constantly produced, transferred, and consumed in vivo. NO participates and plays important roles in multiple biological processes. However, spatiotemporal imaging of NO in living cells is challenging. To fill the gap in currently used techniques, we exploited the versatility of HaloTag technology and synthesized a novel organelle-targetable fluorescent probe called HTDAF-2DA. We demonstrate the utility of the probe by monitoring subcellular NO dynamics. The developed strategy enables precise determination of local NO function.
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Affiliation(s)
- Jianhua Wang
- Synthetic Biology and Biotechnology Laboratory, State Key Laboratory of Bioreactor Engineering, CAS Center for Excellence in Brain Science, School of Pharmacy, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, P. R. China
| | - Yuzheng Zhao
- Synthetic Biology and Biotechnology Laboratory, State Key Laboratory of Bioreactor Engineering, CAS Center for Excellence in Brain Science, School of Pharmacy, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, P. R. China
| | - Chao Wang
- Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, P. R. China
| | - Qian Zhu
- Synthetic Biology and Biotechnology Laboratory, State Key Laboratory of Bioreactor Engineering, CAS Center for Excellence in Brain Science, School of Pharmacy, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, P. R. China
| | - Zengmin Du
- Synthetic Biology and Biotechnology Laboratory, State Key Laboratory of Bioreactor Engineering, CAS Center for Excellence in Brain Science, School of Pharmacy, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, P. R. China
| | - Aiguo Hu
- Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, P. R. China
- * E-mail: (AH); (YY)
| | - Yi Yang
- Synthetic Biology and Biotechnology Laboratory, State Key Laboratory of Bioreactor Engineering, CAS Center for Excellence in Brain Science, School of Pharmacy, East China University of Science and Technology, 130 Mei Long Road, Shanghai, 200237, P. R. China
- * E-mail: (AH); (YY)
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19
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Ascorbic Acid Rejection Characteristics of Modified Platinum Electrodes: A Shelf Life Investigation. CHEMOSENSORS 2015. [DOI: 10.3390/chemosensors3020055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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20
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Increased brain nitric oxide levels following ethanol administration. Nitric Oxide 2015; 47:52-7. [PMID: 25819134 DOI: 10.1016/j.niox.2015.03.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 03/10/2015] [Accepted: 03/13/2015] [Indexed: 01/14/2023]
Abstract
Nitric oxide is a ubiquitous messenger molecule, which at elevated concentrations has been implicated in the pathogenesis of several neurological disorders. Its role in oxidative stress, attributed in particular to the formation of peroxynitrite, proceeds through its high affinity for the superoxide radical. Alcoholism has recently been associated with the induction of oxidative stress, which is generally defined as a shift in equilibrium between pro-oxidant and anti-oxidant species in the direction of the former. Furthermore, its primary metabolite acetaldehyde, has been extensively associated with oxidative damage related toxic effects following alcohol ingestion. The principal objective of this study was the application of long term in vivo electrochemistry (LIVE) to investigate the effect of ethanol (0.125, 0.5 and 2.0 g kg(-1)) and acetaldehyde (12.5, 50 and 200 mg kg(-1)) on NO levels in the nucleus accumbens of freely moving rats. Systemic administrations of ethanol and acetaldehyde resulted in a dose-dependent increases in NO levels, albeit with very differing time courses. Subsequent to this the effect on accumbal NO levels, of subjecting the animal to different drug combinations, was also elucidated. The nitric oxide synthase inhibitor L-NAME (20 mg kg(-1)) and acetaldehyde sequestering agent D-penicillamine (50 mg kg(-1)) both attenuated the increase in NO levels following ethanol (1 g kg(-1)) administration. Conversely, the alcohol dehydrogenase inhibitor 4-methylpyrazole (25 mg kg(-1)) and catalase inhibitor sodium azide (10 mg kg(-1)) potentiated the increase in NO levels following ethanol administration. Finally, dual inhibition of aldehyde dehydrogenase and catalase by cyanamide (25 mg kg(-1)) caused an attenuation of ethanol effects on NO levels. Taken together these data highlight a robust increase in brain NO levels following systemic alcohol administration which is dependent on NO synthase activity and may involve both alcohol- and acetaldehyde-dependent mechanisms.
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21
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Huang CB, Huang J, Xu L. A highly selective fluorescent probe for fast detection of nitric oxide in aqueous solution. RSC Adv 2015. [DOI: 10.1039/c4ra08337g] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A naphthalimide-based fluorescent probe NPA exhibits fast detection rate for NO was synthesized.
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Affiliation(s)
- Chang-Bo Huang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- Department of Chemistry
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Junhai Huang
- Zhangjiang Institute
- China State Institute of Pharmaceutical Industry
- Shanghai 201203
- P. R. China
| | - Lin Xu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes
- Department of Chemistry
- East China Normal University
- Shanghai 200062
- P. R. China
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22
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Wynne AM, Reid CH, Finnerty NJ. In vitro characterisation of ortho phenylenediamine and Nafion®-modified Pt electrodes for measuring brain nitric oxide. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.09.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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23
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Law WHT, Leung KK, Lee LCC, Poon CS, Liu HW, Lo KKW. Cyclometalated Iridium(III) Bipyridyl-Phenylenediamine Complexes with Multicolor Phosphorescence: Synthesis, Electrochemistry, Photophysics, and Intracellular Nitric Oxide Sensing. ChemMedChem 2014; 9:1316-29. [DOI: 10.1002/cmdc.201400040] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Indexed: 11/08/2022]
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24
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Highly selective two-photon fluorescent probe for imaging of nitric oxide in living cells. CHINESE CHEM LETT 2014. [DOI: 10.1016/j.cclet.2013.11.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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25
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Ma S, Fang DC, Ning B, Li M, He L, Gong B. The rational design of a highly sensitive and selective fluorogenic probe for detecting nitric oxide. Chem Commun (Camb) 2014; 50:6475-8. [DOI: 10.1039/c4cc01142b] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
A small-molecule fluorogenic probe for nitric oxide (NO) detection based on a new switching mechanism is developedviaa rational design.
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Affiliation(s)
- Sufang Ma
- College of Chemistry
- Beijing Normal University
- Beijing 100875, China
| | - De-Cai Fang
- College of Chemistry
- Beijing Normal University
- Beijing 100875, China
| | - Baoming Ning
- National Institute for Food and Drug Control
- Beijing 100050, China
| | - Minfeng Li
- College of Chemistry
- Beijing Normal University
- Beijing 100875, China
| | - Lan He
- College of Chemistry
- Beijing Normal University
- Beijing 100875, China
- National Institute for Food and Drug Control
- Beijing 100050, China
| | - Bing Gong
- College of Chemistry
- Beijing Normal University
- Beijing 100875, China
- Department of Chemistry
- University at Buffalo
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26
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Design and Synthesis of a Ruthenium(II) Complex-Based Luminescent Probe for Highly Selective and Sensitive Luminescence Detection of Nitric Oxide. J Fluoresc 2013; 23:1113-20. [DOI: 10.1007/s10895-013-1240-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Accepted: 05/22/2013] [Indexed: 10/26/2022]
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27
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Yu H, Jin L, Dai Y, Li H, Xiao Y. From a BODIPY–rhodamine scaffold to a ratiometric fluorescent probe for nitric oxide. NEW J CHEM 2013. [DOI: 10.1039/c3nj41127c] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Yu C, Wu Y, Zeng F, Wu S. A fluorescent ratiometric nanosensor for detecting NO in aqueous media and imaging exogenous and endogenous NO in live cells. J Mater Chem B 2013; 1:4152-4159. [DOI: 10.1039/c3tb20686f] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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29
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Yap CM, Xu GQ, Ang SG. Amperometric Nitric Oxide Sensor Based on Nanoporous Platinum Phthalocyanine Modified Electrodes. Anal Chem 2012; 85:107-13. [DOI: 10.1021/ac302081h] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - G. Q. Xu
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3,
117543, Singapore
| | - S. G. Ang
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3,
117543, Singapore
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30
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Shiue TW, Chen YH, Wu CM, Singh G, Chen HY, Hung CH, Liaw WF, Wang YM. Nitric oxide turn-on fluorescent probe based on deamination of aromatic primary monoamines. Inorg Chem 2012; 51:5400-8. [PMID: 22486484 DOI: 10.1021/ic300379u] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The stable, water-soluble, and nonfluorescent FA-OMe can sense nitric oxide (NO) and form the intensely fluorescent product dA-FA-OMe via reductive deamination of the aromatic primary amine. The reaction is accompanied by a notable increase of the fluorescent quantum yield from 1.5 to 88.8%. The deamination mechanism of FA-OMe with NO was proposed in this study. The turn-on fluorescence signals were performed by suppression of photoinduced electron transfer (PeT), which was demonstrated by density functional theory (DFT) calculations of the components forming FA-OMe and dA-FA-OMe. Furthermore, FA-OMe showed water solubility and good stability at physiological pHs. Moreover, the selectivity study indicated that FA-OMe had high specificity for NO over other reactive oxygen/nitrogen species. In an endogenously generated NO detection study, increasing the incubation time of FA-OMe with lipopolysaccharide (LPS) pretreated Raw 264.7 murine macrophages could cause an enhanced fluorescence intensity image. In addition, a diffusion/localization cell imaging study showed that FA-OMe could be trapped in Raw 264.7 cells. These cell imaging results demonstrated that FA-OMe could be used as a turn-on fluorescent sensor for the detection of endogenously generated NO.
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Affiliation(s)
- Tsun-Wei Shiue
- Department of Biological Science and Technology, Institute of Molecular Medicine and Bioengineering, National Chiao Tung University, 75 Bo-Ai Street, Hsinchu 300, Taiwan
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31
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Sensitivity evaluation of rhodamine B hydrazide towards nitric oxide and its application for macrophage cells imaging. Anal Chim Acta 2011; 708:141-8. [DOI: 10.1016/j.aca.2011.10.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2011] [Revised: 09/15/2011] [Accepted: 10/03/2011] [Indexed: 12/13/2022]
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32
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Chen Y, Guo W, Ye Z, Wang G, Yuan J. A europium(iii) chelate as an efficient time-gated luminescent probe for nitric oxide. Chem Commun (Camb) 2011; 47:6266-8. [DOI: 10.1039/c0cc05658h] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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33
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Information processing deficits and nitric oxide signalling in the phencyclidine model of schizophrenia. Psychopharmacology (Berl) 2010; 212:643-51. [PMID: 20802999 DOI: 10.1007/s00213-010-1992-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2010] [Accepted: 08/04/2010] [Indexed: 12/22/2022]
Abstract
RATIONALE Schizophrenia-like cognitive deficits induced by phencyclidine (PCP), a drug commonly used to model schizophrenia in experimental animals, are attenuated by nitric oxide (NO) synthase inhibitors. Furthermore, PCP increases NO levels and sGC/cGMP signalling in the prefrontal cortex in rodents. Hence, a cortical NO/sGC/cGMP signalling pathway may constitute a target for novel pharmacological therapies in schizophrenia. OBJECTIVES The objective of this study was to further investigate the role of NO signalling for a PCP-induced deficit in pre-attentive information processing. MATERIALS AND METHODS Male Sprague-Dawley rats were surgically implanted with NO-selective amperometric microsensors aimed at the prefrontal cortex, ventral hippocampus or nucleus accumbens, and NO levels and prepulse inhibition (PPI) were simultaneously assessed. RESULTS PCP treatment increased NO levels in the prefrontal cortex and ventral hippocampus, but not in the nucleus accumbens. The increase in NO levels was not temporally correlated to the deficit in PPI induced by PCP. Furthermore, pretreatment with the neuronal NO synthase inhibitor N-propyl-L-arginine dose-dependently attenuated both the increase in prefrontal cortex NO levels and the deficit in PPI. CONCLUSIONS These findings support a demonstrated role of NO in the behavioural and neurochemical effects of PCP. Furthermore, this effect is brain region-specific and mainly involves the neuronal isoform of NOS. However, a temporal correlation between a PCP-induced disruption of PPI and an increase in prefrontal cortex NO levels was not demonstrated, suggesting that the interaction between PCP and the NO system is more complex than previously thought.
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Zhang R, Ye Z, Wang G, Zhang W, Yuan J. Development of a Ruthenium(II) Complex Based Luminescent Probe for Imaging Nitric Oxide Production in Living Cells. Chemistry 2010; 16:6884-91. [DOI: 10.1002/chem.200903267] [Citation(s) in RCA: 86] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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35
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Qiang L, Zhu S, Ma H, Zhou J. Investigation on binding of nitric oxide to horseradish peroxidase by absorption spectrometry. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2010; 75:417-421. [PMID: 19944641 DOI: 10.1016/j.saa.2009.10.051] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2009] [Revised: 10/22/2009] [Accepted: 10/28/2009] [Indexed: 05/28/2023]
Abstract
Binding of nitric oxide to horseradish peroxidase (HRP) has been investigated by absorption spectrometry in 0.2M anaerobic phosphate buffer solution (pH 7.4). Based on this binding equilibrium, a model equation for evaluating the binding constant of nitric oxide to HRP is developed and the binding constant is calculated to be (1.55+/-0.06)x10(4)M(-1), indicating that HRP can form a stable complex with nitric oxide. The type of inhibition by nitric oxide is validated on the basis of studying initial reaction rates of HRP-catalyzed oxidation of guaiacol in the presence of hydrogen peroxide and nitric oxide. The inhibition mechanism is found to follow an apparent non-competitive inhibition by Lineweaver-Burk method. Based on this kinetic mechanism, the binding constant is also calculated to be (5.22+/-0.06)x10(4)M(-1). The values of the binding constant determined by the two methods are almost identical. The non-competitive inhibition model is also applicable to studying the effect of nitric oxide on other metalloenzymes, which catalyze the two-substrate reaction with the "ping-pong" mechanism.
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Affiliation(s)
- Li Qiang
- College of Chemistry and Material Science, Shandong Agricultural University, Taian, Shandong, PR China
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36
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Pålsson E, Finnerty N, Fejgin K, Klamer D, Wass C, Svensson L, Lowry J. Increased cortical nitric oxide release after phencyclidine administration. Synapse 2009; 63:1083-8. [DOI: 10.1002/syn.20690] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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37
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Gu F, Xu GQ, Ang SG. Studies on CuTAPc-nanotube-modified electrodes as chemical sensors for NO. NANOTECHNOLOGY 2009; 20:305501. [PMID: 19581690 DOI: 10.1088/0957-4484/20/30/305501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Poly-copper tetraaminophthalocyanine (CuTAPc) nanotubes were successfully fabricated on porous alumina templates by electropolymerization. Their high surface area and simple preparation protocol made them potential candidates as the modification layer of electrodes for sensor application. High sensitivities and improved linear ranges were obtained through different measurements such as differential pulse voltammetry (DPV), differential potential amperometric (DPA) and electrochemical impedance spectroscopy (EIS). Detection limits as low as 10 nM were demonstrated in common voltammetric analysis with ultra-high response current in the microA range.
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Affiliation(s)
- Feng Gu
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
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Prefrontal GABA(B) receptor activation attenuates phencyclidine-induced impairments of prepulse inhibition: involvement of nitric oxide. Neuropsychopharmacology 2009; 34:1673-84. [PMID: 19145229 DOI: 10.1038/npp.2008.225] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Recent theories propose that both GABA and glutamate signaling are compromised in patients with schizophrenia. These deficits can be observed in several brain regions including the prefrontal cortex (PFC), an area extensively linked to the cognitive dysfunction in this disease and notably affected by NMDA receptor antagonists such as phencyclidine (PCP). We have previously demonstrated that inhibition of the nitric oxide (NO) pathways in the brain, particularly in the PFC, prevents a wide range of PCP-induced behavioral deficits including disruption of prepulse inhibition (PPI). This study investigated the role of GABA(B) receptor signaling and NO in the effects of PCP on PPI. Mice received systemic or prefrontal injections of the GABA(B) receptor agonist baclofen (2.5-5 mg/kg and 1 mM) before PCP treatment (5 mg/kg) and were thereafter tested for PPI. GABA/NO interactions were studied by combining baclofen and the NO synthase inhibitor L-NAME (20 mg/kg) in subthreshold doses. The role of GABA(B) receptors for NO production in vivo was assessed using NO-sensors implanted into the rat PFC. PCP-induced PPI deficits were attenuated in an additive manner by systemic baclofen treatment, whereas prefrontal microinjections of baclofen completely blocked the effects of PCP, without affecting PPI per se. The combination of baclofen and L-NAME was more effective in preventing the effects of PCP than any compound by itself. Additionally, baclofen decreased NO release in the PFC in a dose-related manner. This study proposes a role for GABA(B) receptor signaling in the effects of PCP, with altered NO levels as a downstream consequence. Thus, prefrontal NO signaling mirrors an altered level of cortical inhibition that may be of importance for information processing deficits in schizophrenia.
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Brown FO, Finnerty NJ, Lowry JP. Nitric oxide monitoring in brain extracellular fluid: characterisation of Nafion®-modified Pt electrodes in vitro and in vivo. Analyst 2009; 134:2012-20. [DOI: 10.1039/b909005c] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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