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Yokoi T, Murata K, Ishii K. Photochemistry of phthalocyanine based on spin angular momenta: a kinetic study of fluorescent probes for ascorbic acid. PURE APPL CHEM 2021. [DOI: 10.1515/pac-2021-0301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Ascorbic acid, i.e., vitamin C, is a well-known essential nutrient, and has attracted considerable attention as a new candidate for cancer therapy. Previously, R2c consisting of silicon tetra-tert-butylphthalocyanine (SiPc) and two 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) radicals has been encapsulated into the hydrophobic cavity of dimeric bovine serum albumin (BSA), i.e., R2c@(BSA)2, and the system was found to behave as a highly sensitive and selective fluorescent probe for detecting ascorbic acid not only in aqueous solutions but also in vivo. In this study, kinetics of the reaction of R2c@(BSA)2 with ascorbic acid have been studied based on the temporal evolution of fluorescence. Global fitting of the concentration dependence using the Runge-Kutta method revealed the existence of stepwise two proton-coupled electron transfer processes. The rate constants for the reactions with ascorbic acid (k
AA
) and ascorbate radical (k
AR
) were 3 × 10 and 1 × 105 min−1 M−1, respectively, suggesting that the reaction with ascorbate radical was much faster than that with ascorbic acid. These results were further corroborated by theoretical calculations of the Gibbs free energy differences and by spin statistical factors. The analysis presented herein will aid in understanding the two proton-coupled electron transfer processes in the reaction with ascorbic acid.
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Affiliation(s)
- Takanori Yokoi
- Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba Meguro-ku , Tokyo , 153-8505 , Japan
| | - Kei Murata
- Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba Meguro-ku , Tokyo , 153-8505 , Japan
| | - Kazuyuki Ishii
- Institute of Industrial Science, The University of Tokyo , 4-6-1 Komaba Meguro-ku , Tokyo , 153-8505 , Japan
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2
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Cerretani C, Vosch T. Switchable Dual-Emissive DNA-Stabilized Silver Nanoclusters. ACS OMEGA 2019; 4:7895-7902. [PMID: 31459877 PMCID: PMC6693819 DOI: 10.1021/acsomega.9b00614] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 04/19/2019] [Indexed: 05/10/2023]
Abstract
We investigated an ss-DNA sequence that can stabilize a red- and a green-emissive silver nanocluster (DNA-AgNC). These two emitters can convert between each other in a reversible way. The change from red- to green-emitting DNA-AgNCs can be triggered by the addition of H2O2, while the opposite conversion can be achieved by the addition of NaBH4. Besides demonstrating the switching between red- and green-emissive DNA-AgNCs and determining the recoverability, we fully characterized the photophysical properties, such as steady-state emission, quantum yield, fluorescence lifetime, and anisotropy of the two emissive species. Understanding the mechanism behind the remarkable conversion between the two emitters could lead to the development of a new range of DNA-AgNC-based ratiometric sensors.
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3
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Schultz-Simonton W, Skelly P, Chakraborty I, Mascharak P, Braslau R. Synthesis, Structure, and Fluorescence Behavior of Profluorescent 8-Amino BODIPY Nitroxides. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wiley Schultz-Simonton
- Chemistry and Biochemistry; University of California Santa Cruz; 1156 High St. 95064 Santa Cruz CA USA
| | - Patrick Skelly
- Chemistry and Biochemistry; University of California Santa Cruz; 1156 High St. 95064 Santa Cruz CA USA
| | - Indranil Chakraborty
- Chemistry and Biochemistry; University of California Santa Cruz; 1156 High St. 95064 Santa Cruz CA USA
| | - Pradip Mascharak
- Chemistry and Biochemistry; University of California Santa Cruz; 1156 High St. 95064 Santa Cruz CA USA
| | - Rebecca Braslau
- Chemistry and Biochemistry; University of California Santa Cruz; 1156 High St. 95064 Santa Cruz CA USA
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4
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Yokoi T, Ishii K. Dependence of phthalocyanine-based fluorescence on albumin structure: A fluorescent probe for ascorbic acid. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.05.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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In vivo fluorescence bioimaging of ascorbic acid in mice: Development of an efficient probe consisting of phthalocyanine, TEMPO, and albumin. Sci Rep 2018; 8:1560. [PMID: 29367703 PMCID: PMC5784034 DOI: 10.1038/s41598-018-19762-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 01/09/2018] [Indexed: 01/08/2023] Open
Abstract
After a groundbreaking study demonstrated that a high dose of ascorbic acid selectively kills cancer cells, the compound has been tested in the clinic against various forms of cancers, with some success. However, in vivo tracing of intravenously injected ascorbic acid has not been achieved. Herein, we successfully imaged ascorbic acid intravenously injected into mice based on the discovery of a novel, highly sensitive, and appropriately selective fluorescent probe consisting of silicon phthalocyanine (SiPc) and two 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) radicals, i.e., R2c. The radicals in this R2c were encapsulated in dimeric bovine serum albumin, and the sensitivity was >100-fold higher than those of other R2c-based probes. Ascorbic acid intravenously injected into mice was efficiently transported to the liver, heart, lung, and cholecyst. The present results provide opportunities to advance the use of ascorbic acid as cancer therapy.
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6
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Kaur A. Introduction. SPRINGER THESES 2018. [PMCID: PMC7122183 DOI: 10.1007/978-3-319-73405-7_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Primordial life forms on earth comprised oxygen-sensitive organisms: the anaerobic fermenters and cyanobacteria, which released oxygen as a metabolic by-product, causing the oxygen levels in the atmosphere to rise Benzie (Eur J Nutr 39:53–61, 2000 [1]), Halliwell (Free Radic Res 31:261–272, 1999 [2]).
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Affiliation(s)
- Amandeep Kaur
- School of Chemistry, University of Sydney, Sydney, NSW Australia
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7
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Allen JP, Pfrunder MC, McMurtrie JC, Bottle SE, Blinco JP, Fairfull‐Smith KE. BODIPY‐Based Profluorescent Probes Containing
Meso
‐ and β‐Substituted Isoindoline Nitroxides. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601280] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jesse P. Allen
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - Michael C. Pfrunder
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - John C. McMurtrie
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - Steven E. Bottle
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - James P. Blinco
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
| | - Kathryn E. Fairfull‐Smith
- Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
- ARC Centre of Excellence for Free Radical Chemistry and Biotechnology Faculty of Science and Engineering Queensland University of Technology (QUT) 2 George St 4001 Brisbane QLD Australia
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8
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Liu S, Zhou N, Chen Z, Wei H, Zhu Y, Guo S, Zhao Q. Using a redox-sensitive phosphorescent probe for optical evaluation of an intracellular redox environment. OPTICS LETTERS 2017; 42:13-16. [PMID: 28059208 DOI: 10.1364/ol.42.000013] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A reducing intracellular environment is necessary for living cells. Here a redox-sensitive phosphorescent probe Ir-NO has been developed for evaluating the redox environment in living cells. Upon addition of reducing molecules, such as glutathione and ascorbic acid, the phosphorescent intensity of the probe is turned on, and the emission lifetime is elongated evidently. Furthermore, this probe has been used for optical imaging of the intracellular reducing environment by utilizing confocal laser scanning microscopy and phosphorescence lifetime imaging microscopy.
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Sato S, Endo S, Kurokawa Y, Yamaguchi M, Nagai A, Ito T, Ogata T. Synthesis and fluorescence properties of six fluorescein-nitroxide radical hybrid-compounds. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 169:66-71. [PMID: 27337053 DOI: 10.1016/j.saa.2016.06.021] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 05/21/2016] [Accepted: 06/13/2016] [Indexed: 06/06/2023]
Abstract
Six fluorescein-nitroxide radical hybrid-compounds (2ab, 3ab, 4, and 5) were synthesized by the condensation of 5- or 6-carboxy-fluorescein and 4-amino-TEMPO (2ab), 5- or 6-aminofluorescein and 4-carboxy-TEMPO (3ab), and fluorescein and 4-carboxy-TEMPO (4), or by reaction of the 3-hydroxyl group of fluorescein with DPROXYL-3-ylmethyl methanesulfonate (5). Fluorescence intensities (around 520nm) after reduction of the radical increased to 1.43-, 1.38-, and 1.61-folds for 2a, 2b and 3b respectively; 3a alone exhibited a decrease in intensity on reduction. Since 4 was readily solvolyzed in PBS or even methanol to afford fluorescein and 4-carboxy-TEMPO, its fluorescence change could not be measured. Hybrid compound 5 containing an ether-linkage between the fluorescein phenol and 3-hydroxymethyl-DPROXYL hydroxyl centers, was stable and on reduction, showed a maximum increase (3.21-fold) in relative fluorescence intensity in PBS (pH5.0), despite its remarkably low absolute fluorescence intensity.
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Affiliation(s)
- Shingo Sato
- Graduate School of Science and Engineering, Yamagata University, Jonan 4-3-16, Yonezawa-shi, Yamagata 992-8510, Japan.
| | - Susumu Endo
- Graduate School of Science and Engineering, Yamagata University, Jonan 4-3-16, Yonezawa-shi, Yamagata 992-8510, Japan
| | - Yusuke Kurokawa
- Graduate School of Science and Engineering, Yamagata University, Jonan 4-3-16, Yonezawa-shi, Yamagata 992-8510, Japan
| | - Masaki Yamaguchi
- Graduate School of Science and Engineering, Yamagata University, Jonan 4-3-16, Yonezawa-shi, Yamagata 992-8510, Japan
| | - Akio Nagai
- Graduate School of Science and Engineering, Yamagata University, Jonan 4-3-16, Yonezawa-shi, Yamagata 992-8510, Japan
| | - Tomohiro Ito
- Graduate School of Science and Engineering, Yamagata University, Jonan 4-3-16, Yonezawa-shi, Yamagata 992-8510, Japan
| | - Tateaki Ogata
- Graduate School of Science and Engineering, Yamagata University, Jonan 4-3-16, Yonezawa-shi, Yamagata 992-8510, Japan
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10
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Kolanowski JL, Kaur A, New EJ. Selective and Reversible Approaches Toward Imaging Redox Signaling Using Small-Molecule Probes. Antioxid Redox Signal 2016; 24:713-30. [PMID: 26607478 DOI: 10.1089/ars.2015.6588] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
SIGNIFICANCE Recent research has identified key roles for reactive oxygen species (ROS)/reactive nitrogen species (RNS) in redox signaling, but much remains to be uncovered. Molecular imaging tools to study these processes must not only be selective to enable identification of the ROS/RNS involved but also reversible to distinguish signaling processes from oxidative stress. Fluorescent sensors offer the potential to image such processes with high spatial and temporal resolution. RECENT ADVANCES A broad array of strategies has been developed that enable the selective sensing of ROS/RNS. More recently, attention has turned to the design of reversible small-molecule sensors of global redox state, with a further set of probes capable of reversible sensing of individual ROS/RNS. CRITICAL ISSUES In this study, we discuss the key challenges in achieving simultaneous detection of reversible oxidative bursts with unambiguous determination of a particular ROS/RNS. FUTURE DIRECTIONS We have highlighted key design features of small-molecule probes that show promise in enabling the study of redox signaling, identifying essential parameters that must be assessed for any new probe. Antioxid. Redox Signal. 24, 713-730.
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Affiliation(s)
- Jacek L Kolanowski
- School of Chemistry, The University of Sydney , Sydney, New South Wales, Australia
| | - Amandeep Kaur
- School of Chemistry, The University of Sydney , Sydney, New South Wales, Australia
| | - Elizabeth J New
- School of Chemistry, The University of Sydney , Sydney, New South Wales, Australia
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11
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Kaur A, Kolanowski JL, New EJ. Reversible Fluorescent Probes for Biological Redox States. Angew Chem Int Ed Engl 2015; 55:1602-13. [DOI: 10.1002/anie.201506353] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Indexed: 12/21/2022]
Affiliation(s)
- Amandeep Kaur
- School of Chemistry; The University of Sydney; NSW 2006 Australia
| | | | - Elizabeth J. New
- School of Chemistry; The University of Sydney; NSW 2006 Australia
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12
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Kaur A, Kolanowski JL, New EJ. Reversible Fluoreszenzsonden für biologische Redoxzustände. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506353] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Amandeep Kaur
- School of Chemistry; The University of Sydney; NSW 2006 Australia
| | | | - Elizabeth J. New
- School of Chemistry; The University of Sydney; NSW 2006 Australia
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13
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Magri DC. Photoinduced electron transfer as a design concept for luminescent redox indicators. Analyst 2015; 140:7487-95. [DOI: 10.1039/c5an01491c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The exploitation of photoinduced electron transfer as a general design principle for the development of luminescent redox indicators and logic gates is described. Potential future applications in biology, environmental analysis, biomedical diagnostics, corrosion science and materials science are mentioned.
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Affiliation(s)
- David C. Magri
- Department of Chemistry
- Faculty of Science
- University of Malta
- Msida
- Malta
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14
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Xu C, Cai L. Analysis of intracellular reducing levels in human hepatocytes on three-dimensional focusing microchip. LUMINESCENCE 2013; 29:36-41. [PMID: 23297173 DOI: 10.1002/bio.2472] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Revised: 09/22/2012] [Accepted: 11/22/2012] [Indexed: 11/05/2022]
Abstract
A novel three-dimensional hydrodynamic focusing microfluidic device integrated with high-throughput cell sampling and detection of intracellular contents is presented. It has a pivotal role in maintaining the reducing environment in cells. Intracellular reducing species such as vitamin C and glutathione in normal and tumor cells were labeled by a newly synthesized 2,2,6,6-tetramethyl-piperidine-1-oxyl-based fluorescent probe. Hepatocytes are adherent cells, which are prone to attaching to the channel surface. To avoid the attachment of cells on the channel surface, a single channel microchip with three sheath-flow channels located on both sides of and below the sampling channel was developed. Hydrostatic pressure generated by emptying the sample waste reservoir was used as driving force of fluid on the microchip. Owing to the difference between the liquid levels of the reservoirs, the labeled cells were three-dimensional hydrodynamically focused and transported from the sample reservoir to the sample waste reservoir. Hydrostatic pressure takes advantage of its ease of generation on a microfluidic chip without any external pressure pump, which drives three sheath-flow streams to constrain a sample flow stream into a narrow stream to avoid blockage of the sampling channel by adhered cells. The intracellular reducing levels of HepG2 cells and L02 cells were detected by home-built laser-induced fluorescence detector. The analysis throughput achieved in this microfluidic system was about 59-68 cells/min.
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Affiliation(s)
- Chunxiu Xu
- Department of Chemistry, Hanshan Normal University, 521041, Chaozhou, People's Republic of China
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15
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Wang S, Li N, Pan W, Tang B. Advances in functional fluorescent and luminescent probes for imaging intracellular small-molecule reactive species. Trends Analyt Chem 2012. [DOI: 10.1016/j.trac.2012.07.010] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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16
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Hirosawa S, Arai S, Takeoka S. A TEMPO-conjugated fluorescent probe for monitoring mitochondrial redox reactions. Chem Commun (Camb) 2012; 48:4845-7. [PMID: 22506265 DOI: 10.1039/c2cc30603d] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a mitochondrial targeted redox probe (MitoRP) that comprises a nitroxide radical (TEMPO) moiety and coumarin 343. Using isolated mitochondria in the presence/absence of substrates and inhibitors of oxidative phosphorylation, we demonstrated that MitoRP is a useful probe to monitor the electron flow associated with complex I.
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Affiliation(s)
- Shota Hirosawa
- Department of Life Science and Medical Bioscience, Graduate School of Advanced Science and Engineering, Waseda University (TWIns), Tokyo 162-8480, Japan
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Liu Y, Zhu M, Xu J, Zhang H, Tian M. Using a TEMPO-based fluorescent probe for monitoring oxidative stress in living cells. Analyst 2011; 136:4316-20. [DOI: 10.1039/c1an15417f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Ishii K, Kubo K, Sakurada T, Komori K, Sakai Y. Phthalocyanine-based fluorescence probes for detecting ascorbic acid: phthalocyaninatosilicon covalently linked to TEMPO radicals. Chem Commun (Camb) 2011; 47:4932-4. [DOI: 10.1039/c1cc10817d] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Van Blerkom J. Mitochondrial function in the human oocyte and embryo and their role in developmental competence. Mitochondrion 2010; 11:797-813. [PMID: 20933103 DOI: 10.1016/j.mito.2010.09.012] [Citation(s) in RCA: 437] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2010] [Revised: 09/28/2010] [Accepted: 09/28/2010] [Indexed: 10/19/2022]
Abstract
The role of mitochondria as a nexus of developmental regulation in mammalian oogenesis and early embryogenesis is emerging from basic research in model species and from clinical studies in infertility treatments that require in vitro fertilization and embryo culture. Here, mitochondrial bioenergetic activities and roles in calcium homeostasis, regulation of cytoplasmic redox state, and signal transduction are discussed with respect to outcome in general, and as possible etiologies of chromosomal defects, maturation and fertilization failure in human oocytes, and as causative factors in early human embryo demise. At present, the ability of mitochondria to balance ATP supply and demand is considered the most critical factor with respect to fertilization competence for the oocyte and developmental competence for the embryo. mtDNA copy number, the timing of mtDNA replication during oocyte maturation, and the numerical size of the mitochondrial complement in the oocyte are evaluated with respect to their relative contribution to the establishment of developmental competence. Rather than net cytoplasmic bioenergetic capacity, the notion of functional compartmentalization of mitochondria is presented as a means by which ATP may be differentially supplied and localized within the cytoplasm by virtue of stage-specific changes in mitochondrial density and potential (ΔΨm). Abnormal patterns of calcium release and sequestration detected at fertilization in the human appear to have coincident effects on levels of mitochondrial ATP generation. These aberrations are not uncommon in oocytes obtained after ovarian hyperstimulation for in vitro fertilization. The possibility that defects in mitochondrial calcium regulation or bioenergetic homeostasis could have negative downstream development consequences, including imprinting disorders, is discussed in the context of signaling pathways and cytoplasmic redox state.
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Affiliation(s)
- Jonathan Van Blerkom
- Department of Molecular, Cellular and Developmental Biology, The University of Colorado, Boulder, Colorado, USA.
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