1
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Ayaz S, Üzer A, Dilgin Y, Apak MR. Fabrication of a Novel Optical Glucose Biosensor Using Copper(II) Neocuproine as a Chromogenic Oxidant and Glucose Dehydrogenase-Immobilized Magnetite Nanoparticles. ACS OMEGA 2023; 8:47163-47172. [PMID: 38107897 PMCID: PMC10719923 DOI: 10.1021/acsomega.3c07181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/11/2023] [Accepted: 11/20/2023] [Indexed: 12/19/2023]
Abstract
This study describes a novel optical glucose biosensor based on a colorimetric reaction between reduced nicotinamide adenine dinucleotide (NADH) and a copper(II) neocuproine complex ([Cu(Nc)2]2+) as a chromogenic oxidant. An enzymatic reaction takes place between glucose and glucose dehydrogenase (GDH)-chitosan (CS) immobilized on silanized magnetite nanoparticles (CS@SiO2@Fe3O4) in the presence of coenzyme NAD+. The oxidation of glucose to gluconolactone via the immobilized enzyme is coupled with the reduction of NAD+ to NADH at the same time. After the separation of GDH-immobilized SiO2@Fe3O4 with a magnet, the enzymatically produced NADH chemically reduces the chromogenic oxidant cupric neocuproine to the cuprous chelate. Thus, the glucose biosensor is fabricated based on the measurement of the absorbance of the formed yellow-orange complex ([Cu(Nc)2]+) at 450 nm. The obtained results show that the colorimetric biosensor has a wide linear response range for glucose, between 1.0 and 150.0 μM under optimized conditions. The limit of detection and limit of quantification were found to be 0.31 and 1.02 μM, respectively. The selectivity properties of the fabricated biosensor were tested with various interfering species. This biosensor was applied to various samples, and the obtained results suggest that the fabricated optical biosensor can be successfully used for the selective and sensitive determination of glucose in real samples.
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Affiliation(s)
- Selen Ayaz
- Faculty
of Science, Department of Chemistry, Canakkale
Onsekiz Mart University, Canakkale 17100, Turkey
| | - Ayşem Üzer
- Faculty
of Engineering, Department of Chemistry, İstanbul University-Cerrahpaşa, İstanbul-Avcılar 34320, Turkey
| | - Yusuf Dilgin
- Faculty
of Science, Department of Chemistry, Canakkale
Onsekiz Mart University, Canakkale 17100, Turkey
| | - M. Reşat Apak
- Faculty
of Engineering, Department of Chemistry, İstanbul University-Cerrahpaşa, İstanbul-Avcılar 34320, Turkey
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2
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Navas LE, Blanco-Alcaina E, Suarez-Martinez E, Verdugo-Sivianes EM, Espinosa-Sanchez A, Sanchez-Diaz L, Dominguez-Medina E, Fernandez-Rozadilla C, Carracedo A, Wu LE, Carnero A. NAD pool as an antitumor target against cancer stem cells in head and neck cancer. J Exp Clin Cancer Res 2023; 42:55. [PMID: 36864434 PMCID: PMC9983242 DOI: 10.1186/s13046-023-02631-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 02/25/2023] [Indexed: 03/04/2023] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) is a heterogeneous group of tumors that affect different anatomical locations. Despite this heterogeneity, HNSCC treatment depends on the anatomical location, TNM stage and resectability of the tumor. Classical chemotherapy is based on platinum-derived drugs (cisplatin, carboplatin and oxaliplatin), taxanes (docetaxel, paclitaxel) and 5-fluorouracil1. Despite advances in HNSCC treatment, the rate of tumor recurrence and patient mortality remain high. Therefore, the search for new prognostic identifiers and treatments targeting therapy-resistant tumor cells is vital. Our work demonstrates that there are different subgroups with high phenotypic plasticity within the CSC population in HNSCC. CD10, CD184, and CD166 may identify some of these CSC subpopulations with NAMPT as a common metabolic gene for the resilient cells of these subpopulations. We observed that NAMPT reduction causes a decrease in tumorigenic and stemness properties, migration capacity and CSC phenotype through NAD pool depletion. However, NAMPT-inhibited cells can acquire resistance by activating the NAPRT enzyme of the Preiss-Handler pathway. We observed that coadministration of the NAMPT inhibitor with the NAPRT inhibitor cooperated inhibiting tumor growth. The use of an NAPRT inhibitor as an adjuvant improved NAMPT inhibitor efficacy and reduced the dose and toxicity of these inhibitors. Therefore, it seems that the reduction in the NAD pool could have efficacy in tumor therapy. This was confirmed by in vitro assays supplying the cells with products of inhibited enzymes (NA, NMN or NAD) and restoring their tumorigenic and stemness properties. In conclusion, the coinhibition of NAMPT and NAPRT improved the efficacy of antitumor treatment, indicating that the reduction in the NAD pool is important to prevent tumor growth.
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Affiliation(s)
- Lola E. Navas
- grid.9224.d0000 0001 2168 1229Instituto de Biomedicina de Sevilla (IBIS)/HUVR/CSIC, Hospital Universitario Virgen del Rocío, Ed. IBIS, Consejo Superior de Investigaciones Científicas, Universidad de Sevilla, Avda. Manuel Siurot S/N, 41013 Seville, Spain ,grid.413448.e0000 0000 9314 1427CIBER de Cancer (CIBERONC), Instituto de Salud Carlos III, Madrid, Spain
| | - Elena Blanco-Alcaina
- grid.9224.d0000 0001 2168 1229Instituto de Biomedicina de Sevilla (IBIS)/HUVR/CSIC, Hospital Universitario Virgen del Rocío, Ed. IBIS, Consejo Superior de Investigaciones Científicas, Universidad de Sevilla, Avda. Manuel Siurot S/N, 41013 Seville, Spain ,grid.413448.e0000 0000 9314 1427CIBER de Cancer (CIBERONC), Instituto de Salud Carlos III, Madrid, Spain
| | - Elisa Suarez-Martinez
- grid.9224.d0000 0001 2168 1229Instituto de Biomedicina de Sevilla (IBIS)/HUVR/CSIC, Hospital Universitario Virgen del Rocío, Ed. IBIS, Consejo Superior de Investigaciones Científicas, Universidad de Sevilla, Avda. Manuel Siurot S/N, 41013 Seville, Spain ,grid.413448.e0000 0000 9314 1427CIBER de Cancer (CIBERONC), Instituto de Salud Carlos III, Madrid, Spain
| | - Eva M. Verdugo-Sivianes
- grid.9224.d0000 0001 2168 1229Instituto de Biomedicina de Sevilla (IBIS)/HUVR/CSIC, Hospital Universitario Virgen del Rocío, Ed. IBIS, Consejo Superior de Investigaciones Científicas, Universidad de Sevilla, Avda. Manuel Siurot S/N, 41013 Seville, Spain ,grid.413448.e0000 0000 9314 1427CIBER de Cancer (CIBERONC), Instituto de Salud Carlos III, Madrid, Spain
| | - Asuncion Espinosa-Sanchez
- grid.9224.d0000 0001 2168 1229Instituto de Biomedicina de Sevilla (IBIS)/HUVR/CSIC, Hospital Universitario Virgen del Rocío, Ed. IBIS, Consejo Superior de Investigaciones Científicas, Universidad de Sevilla, Avda. Manuel Siurot S/N, 41013 Seville, Spain ,grid.413448.e0000 0000 9314 1427CIBER de Cancer (CIBERONC), Instituto de Salud Carlos III, Madrid, Spain
| | - Laura Sanchez-Diaz
- grid.9224.d0000 0001 2168 1229Instituto de Biomedicina de Sevilla (IBIS)/HUVR/CSIC, Hospital Universitario Virgen del Rocío, Ed. IBIS, Consejo Superior de Investigaciones Científicas, Universidad de Sevilla, Avda. Manuel Siurot S/N, 41013 Seville, Spain ,grid.413448.e0000 0000 9314 1427CIBER de Cancer (CIBERONC), Instituto de Salud Carlos III, Madrid, Spain
| | - Eduardo Dominguez-Medina
- grid.11794.3a0000000109410645BioFarma-USEF Research Group, Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de Compostela, Santiago de Compostela, Spain
| | - Ceres Fernandez-Rozadilla
- grid.488911.d0000 0004 0408 4897Grupo de Medicina Xenómica (USC), Fundación Pública Galega de Medicina Xenómica, Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela, Spain
| | - Angel Carracedo
- grid.488911.d0000 0004 0408 4897Grupo de Medicina Xenómica (USC), Fundación Pública Galega de Medicina Xenómica, Instituto de Investigación Sanitaria de Santiago (IDIS), Santiago de Compostela, Spain ,grid.413448.e0000 0000 9314 1427CIBER de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Lindsay E. Wu
- grid.1005.40000 0004 4902 0432School of Medical Sciences, UNSW Sydney, Sydney, NSW Australia
| | - Amancio Carnero
- Instituto de Biomedicina de Sevilla (IBIS)/HUVR/CSIC, Hospital Universitario Virgen del Rocío, Ed. IBIS, Consejo Superior de Investigaciones Científicas, Universidad de Sevilla, Avda. Manuel Siurot S/N, 41013, Seville, Spain. .,CIBER de Cancer (CIBERONC), Instituto de Salud Carlos III, Madrid, Spain.
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3
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Navas LE, Carnero A. Nicotinamide Adenine Dinucleotide (NAD) Metabolism as a Relevant Target in Cancer. Cells 2022; 11:cells11172627. [PMID: 36078035 PMCID: PMC9454445 DOI: 10.3390/cells11172627] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 07/25/2022] [Accepted: 08/16/2022] [Indexed: 11/22/2022] Open
Abstract
NAD+ is an important metabolite in cell homeostasis that acts as an essential cofactor in oxidation–reduction (redox) reactions in various energy production processes, such as the Krebs cycle, fatty acid oxidation, glycolysis and serine biosynthesis. Furthermore, high NAD+ levels are required since they also participate in many other nonredox molecular processes, such as DNA repair, posttranslational modifications, cell signalling, senescence, inflammatory responses and apoptosis. In these nonredox reactions, NAD+ is an ADP-ribose donor for enzymes such as sirtuins (SIRTs), poly-(ADP-ribose) polymerases (PARPs) and cyclic ADP-ribose (cADPRs). Therefore, to meet both redox and nonredox NAD+ demands, tumour cells must maintain high NAD+ levels, enhancing their synthesis mainly through the salvage pathway. NAMPT, the rate-limiting enzyme of this pathway, has been identified as an oncogene in some cancer types. Thus, NAMPT has been proposed as a suitable target for cancer therapy. NAMPT inhibition causes the depletion of NAD+ content in the cell, leading to the inhibition of ATP synthesis. This effect can cause a decrease in tumour cell proliferation and cell death, mainly by apoptosis. Therefore, in recent years, many specific inhibitors of NAMPT have been developed, and some of them are currently in clinical trials. Here we review the NAD metabolism as a cancer therapy target.
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Affiliation(s)
- Lola E. Navas
- Instituto de Biomedicina de Sevilla, IBIS, Hospital Universitario Virgen del Rocío, Universidad de Sevilla, Consejo Superior de Investigaciones Científicas, 41013 Sevilla, Spain
- CIBERONC, Instituto de Salud Carlos III, 28029 Madrid, Spain
| | - Amancio Carnero
- Instituto de Biomedicina de Sevilla, IBIS, Hospital Universitario Virgen del Rocío, Universidad de Sevilla, Consejo Superior de Investigaciones Científicas, 41013 Sevilla, Spain
- CIBERONC, Instituto de Salud Carlos III, 28029 Madrid, Spain
- Correspondence:
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4
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Wu S, Huang J, Li Y, Liu Z, Zhao L. Integrated Analysis of lncRNA and circRNA Mediated ceRNA Regulatory Networks in Skin Reveals Innate Immunity Differences Between Wild-Type and Yellow Mutant Rainbow Trout ( Oncorhynchus mykiss). Front Immunol 2022; 13:802731. [PMID: 35655786 PMCID: PMC9152293 DOI: 10.3389/fimmu.2022.802731] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 04/19/2022] [Indexed: 12/04/2022] Open
Abstract
Fish skin is a vital immune organ that forms the first protective barrier preventing entry of external pathogens. Rainbow trout is an important aquaculture fish species that is farmed worldwide. However, our knowledge of innate immunity differences between wild-type (WR_S) and yellow mutant rainbow trout (YR_S) remains limited. In this study, we performed whole transcriptome analysis of skin from WR_S and YR_S cultured in a natural flowing water pond. A total of 2448 mRNAs, 1630 lncRNAs, 22 circRNAs and 50 miRNAs were found to be differentially expressed (DE). Among these DEmRNAs, numerous key immune-related genes, including ifih1, dhx58, trim25, atp6v1e1, tap1, tap2, cd209, hsp90a.1, nlrp3, nlrc3, and several other genes associated with metabolism (gstp1, nampt, naprt and cd38) were identified. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses of DEmRNAs revealed that many were significantly enriched in innate immune-related GO terms and pathways, including NAD+ADP-ribosyltransferase activity, complement binding, immune response and response to bacterium GO terms, and RIG-I-like receptor signaling, NOD-like receptor signaling and phagosome KEGG pathways. Furthermore, the immune-related competing endogenous RNA networks were constructed, from which we found that lncRNAs MSTRG.11484.2, MSTRG.32014.1 and MSTRG.29012.1 regulated at least three immune-related genes (ifih1, dhx58 and irf3) through PC-5p-43254_34, PC-3p-28352_70 and bta-miR-11987_L-1R-1_1ss8TA, and tap2 was regulated by two circRNAs (circRNA5279 and circRNA5277) by oni-mir-124a-2-p5_1ss13GA. The findings expand our understanding of the innate immune system of rainbow trout, and lay the foundation for further study of immune mechanisms and disease resistance breeding.
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Affiliation(s)
- Shenji Wu
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Jinqiang Huang
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Yongjuan Li
- College of Science, Gansu Agricultural University, Lanzhou, China
| | - Zhe Liu
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Lu Zhao
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou, China
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5
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Zhang LY, Geng JB, Wang NX, Wu YH, Yan Z, Xu BC, Xing Y. The Efficient Synthesis of 2-(3-Carbamoylpyridine-2-yl) Nicotinamide Pyridine
Salts. LETT ORG CHEM 2022. [DOI: 10.2174/1570178618666210706112141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
:
The synthesis of axially chiral compounds has attracted a great deal of attention in
recent years. Herein, an efficient and economical synthetic route has been developed for 2-(3-
carbamoylpyridin-2-yl) nicotinamide pyridine salts, axially chiral compounds. The starting material
1,10-phenanthroline is readily available. In this study, 2-(3-carbamoylpyridin-2-yl) nicotinamide
pyridine salts are obtained in moderate to good yields. This protocol includes simple
operations and has easy scalability. In addition, the axial chirality of the products is also preliminary
studied.
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Affiliation(s)
- Lei-Yang Zhang
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences,
Beijing, 100190, China
| | - Jing-Bo Geng
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences,
Beijing, 100190, China
| | - Nai-Xing Wang
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences,
Beijing, 100190, China
| | - Yue-Hua Wu
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences,
Beijing, 100190, China
| | - Zhan Yan
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences,
Beijing, 100190, China
| | - Bao-Cai Xu
- School of Food and Chemical Engineering, Beijing Technology and Business University,
Beijing, 100048, China
| | - Yalan Xing
- Department of Chemistry, William Paterson University of New Jersey, New Jersey, 07470,
United States
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6
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Lu Z, Lightcap IV, Tennyson AG. An organometallic catalase mimic with exceptional activity, H 2O 2 stability, and catalase/peroxidase selectivity. Dalton Trans 2021; 50:15493-15501. [PMID: 34473153 DOI: 10.1039/d1dt02002a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Manganese-porphyrin and -salen redox therapeutics catalyze redox reactions involving O2˙-, H2O2, and other reactive oxygen species, thereby modulating cellular redox states. Many of these complexes perform catalase reactions via high-valent Mn-oxo or -hydroxo intermediates that oxidize H2O2 to O2, but these intermediates can also oxidize other molecules (e.g., thiols), which is peroxidase reactivity. Whether catalase or peroxidase reactivity predominates depends on the metal-ligand set and the local environment, complicating predictions of what therapeutic effects (e.g., promoting vs. suppressing apoptosis) a complex might produce in a given disease. We recently reported an organoruthenium complex (Ru1) that catalyzes ABTS˙- reduction to ABTS2- with H2O2 as the terminal reductant. Given that H2O2 is thermodynamically a stronger oxidant than ABTS˙-, we reasoned that the intermediate that reduced ABTS˙- would also be able to reduce H2O2 to H2O. Herein we demonstrate Ru1-catalyzed H2O2 disproportionation into O2 and H2O, exhibiting an 8,580-fold faster catalase TOF vs. peroxidase TOF, which is 89.2-fold greater than the highest value reported for a Mn-porphyin or -salen complex. Furthermore, Ru1 was 120-fold more stable to H2O2 than the best MnSOD mimic (TON = 4000 vs. 33.4) Mechanistic studies provide evidence that the mechanism for Ru1-catalyzed H2O2 disproportionation is conserved with the mechanism for ABTS˙- reduction. Therapeutic effects of redox catalysts can be predicted with greater accuracy for catalysts that exhibit exclusively catalase activity, thereby facilitating the development of future redox therapeutic strategies for diseases.
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Affiliation(s)
- Zhuomin Lu
- Department of Chemistry, Clemson University, Clemson University, USA.
| | - Ian V Lightcap
- Center for Sustainable Energy, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Andrew G Tennyson
- Department of Chemistry, Clemson University, Clemson University, USA.
- Department of Materials Science and Engineering, Clemson University, Clemson, SC 29634, USA
- Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
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7
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Navas LE, Carnero A. NAD + metabolism, stemness, the immune response, and cancer. Signal Transduct Target Ther 2021; 6:2. [PMID: 33384409 PMCID: PMC7775471 DOI: 10.1038/s41392-020-00354-w] [Citation(s) in RCA: 178] [Impact Index Per Article: 59.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/11/2020] [Accepted: 09/27/2020] [Indexed: 02/07/2023] Open
Abstract
NAD+ was discovered during yeast fermentation, and since its discovery, its important roles in redox metabolism, aging, and longevity, the immune system and DNA repair have been highlighted. A deregulation of the NAD+ levels has been associated with metabolic diseases and aging-related diseases, including neurodegeneration, defective immune responses, and cancer. NAD+ acts as a cofactor through its interplay with NADH, playing an essential role in many enzymatic reactions of energy metabolism, such as glycolysis, oxidative phosphorylation, fatty acid oxidation, and the TCA cycle. NAD+ also plays a role in deacetylation by sirtuins and ADP ribosylation during DNA damage/repair by PARP proteins. Finally, different NAD hydrolase proteins also consume NAD+ while converting it into ADP-ribose or its cyclic counterpart. Some of these proteins, such as CD38, seem to be extensively involved in the immune response. Since NAD cannot be taken directly from food, NAD metabolism is essential, and NAMPT is the key enzyme recovering NAD from nicotinamide and generating most of the NAD cellular pools. Because of the complex network of pathways in which NAD+ is essential, the important role of NAD+ and its key generating enzyme, NAMPT, in cancer is understandable. In the present work, we review the role of NAD+ and NAMPT in the ways that they may influence cancer metabolism, the immune system, stemness, aging, and cancer. Finally, we review some ongoing research on therapeutic approaches.
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Affiliation(s)
- Lola E Navas
- Instituto de Biomedicina de Sevilla (IBIS), Hospital Universitario Virgen del Rocío, Universidad de Sevilla, Consejo Superior de Investigaciones Científicas, Sevilla, Spain.,CIBER de Cancer, Sevilla, Spain
| | - Amancio Carnero
- Instituto de Biomedicina de Sevilla (IBIS), Hospital Universitario Virgen del Rocío, Universidad de Sevilla, Consejo Superior de Investigaciones Científicas, Sevilla, Spain. .,CIBER de Cancer, Sevilla, Spain.
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8
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Braidy N, Villalva MD, van Eeden S. Sobriety and Satiety: Is NAD+ the Answer? Antioxidants (Basel) 2020; 9:antiox9050425. [PMID: 32423100 PMCID: PMC7278809 DOI: 10.3390/antiox9050425] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/03/2020] [Accepted: 05/05/2020] [Indexed: 02/07/2023] Open
Abstract
Nicotinamide adenine dinucleotide (NAD+) is an essential pyridine nucleotide that has garnered considerable interest in the last century due to its critical role in cellular processes associated with energy production, cellular protection against stress and longevity. Research in NAD+ has been reinvigorated by recent findings that components of NAD+ metabolism and NAD-dependent enzymes can influence major signalling processes associated with the neurobiology of addiction. These studies implicate raising intracellular NAD+ levels as a potential target for managing and treating addictive behaviour and reducing cravings and withdrawal symptoms in patients with food addiction and/or substance abuse. Since clinical studies showing the use of NAD+ for the treatment of addiction are limited, this review provides literature evidence that NAD+ can influence the neurobiology of addiction and may have benefits as an anti-addiction intervention.
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Affiliation(s)
- Nady Braidy
- Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales, Sydney, NSW 2052, Australia;
- Correspondence:
| | - Maria D. Villalva
- Centre for Healthy Brain Ageing, School of Psychiatry, University of New South Wales, Sydney, NSW 2052, Australia;
| | - Sam van Eeden
- Centre for Cutaneous Research, Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 4NS, UK;
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9
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Htet Y, Lu Z, Trauger SA, Tennyson AG. Hydrogen peroxide as a hydride donor and reductant under biologically relevant conditions. Chem Sci 2019; 10:2025-2033. [PMID: 30881631 PMCID: PMC6381410 DOI: 10.1039/c8sc05418e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 12/07/2018] [Indexed: 11/21/2022] Open
Abstract
Some ruthenium-hydride complexes react with O2 to yield H2O2, therefore the principle of microscopic reversibility dictates that the reverse reaction is also possible, that H2O2 could transfer an H- to a Ru complex. Mechanistic evidence is presented, using the Ru-catalyzed ABTS˙- reduction reaction as a probe, which suggests that a Ru-H intermediate is formed via deinsertion of O2 from H2O2 following coordination to Ru. This demonstration that H2O2 can function as an H- donor and reductant under biologically-relevant conditions provides the proof-of-concept that H2O2 may function as a reductant in living systems, ranging from metalloenzyme-catalyzed reactions to cellular redox homeostasis, and that H2O2 may be viable as an environmentally-friendly reductant and H- source in green catalysis.
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Affiliation(s)
- Yamin Htet
- Wyss Institute for Biologically Inspired Engineering , Harvard University , Cambridge , MA 02138 , USA
- John A. Paulson School of Engineering and Applied Sciences , Harvard University , Cambridge , MA 02138 , USA
| | - Zhuomin Lu
- Department of Chemistry , Clemson University , Clemson , SC 29634 , USA .
| | - Sunia A Trauger
- Harvard FAS Small Molecule Mass Spectrometry Facility , Harvard University , Cambridge , MA 02138 , USA
| | - Andrew G Tennyson
- Department of Chemistry , Clemson University , Clemson , SC 29634 , USA .
- Department of Materials Science and Engineering , Clemson University , Clemson , SC 29634 , USA
- Center for Optical Materials Science and Engineering Technologies , Anderson , SC 29625 , USA
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10
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Yang JD, Chen BL, Zhu XQ. New Insight into the Mechanism of NADH Model Oxidation by Metal Ions in Nonalkaline Media. J Phys Chem B 2018; 122:6888-6898. [PMID: 29886742 DOI: 10.1021/acs.jpcb.8b03453] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
For a long time, it has been controversial that the three-step (e-H+-e) or two-step (e-H•) mechanism was used for the oxidation of nicotinamide adenine dinucleotide coenzyme (NADH) and its models by metal ions in nonalkaline media. The latter mechanism has been accepted by the majority of researchers. In this work, 1-benzyl-1,4-dihydronicotinamide (BNAH) and 1-phenyl-l,4-dihydronicotinamide are used as NADH models and ferrocenium (Fc+) metal ion as an electron acceptor. The kinetics for oxidation of the NADH models by Fc+ in pure acetonitrile was monitored by using UV-vis absorption and a quadratic relationship between kobs and the concentrations of NADH models was found for the first time. The rate expression of the reactions developed according to the three-step mechanism is quite consistent with the quadratic curves. The rate constants, thermodynamic driving forces, and kinetic isotope effects of each elementary step for the reactions were estimated. All results supported the three-step mechanism. The intrinsic kinetic barriers of the proton transfer from BNAH+• to BNAH and the hydrogen-atom transfer from BNAH+• to BNAH+• were estimated by using Zhu equation; the results showed that the former is 11.8 kcal/mol and the latter is larger than 24.3 kcal/mol. It is the large intrinsic kinetic barrier of the hydrogen-atom transfer that makes the reactions choose the three-step rather than two-step mechanism. Further investigation of the factors affecting the intrinsic kinetic barrier of chemical reactions indicated that the large intrinsic kinetic barrier of the hydrogen-atom transfer originated from the repulsion of positive charges between BNAH+• and BNAH+•. The greatest contribution of this work is the discovery of the quadratic dependence of kobs on the concentrations of the NADH models, which is inconsistent with the conventional viewpoint of the "two-step mechanism" on the oxidation of NADH and its models by metal ions in the nonalkaline media.
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Affiliation(s)
- Jin-Dong Yang
- Center of Basic Molecular Science, Department of Chemistry , Tsinghua University , Beijing 100084 , China
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11
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Wu Y, Ward-Bond J, Li D, Zhang S, Shi J, Jiang Z. g-C3N4@α-Fe2O3/C Photocatalysts: Synergistically Intensified Charge Generation and Charge Transfer for NADH Regeneration. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00070] [Citation(s) in RCA: 113] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Yizhou Wu
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
| | - Jesse Ward-Bond
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
- Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur Private, Ottawa, Ontario K1N 6N5, Canada
| | - Donglin Li
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Shaohua Zhang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
| | - Jiafu Shi
- Tianjin Engineering Center of Biomass-derived Gas and Oil, School of Environmental Science & Engineering, Tianjin University, Tianjin 300072, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Zhongyi Jiang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China
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