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Moniruzzaman M, Karal MAS, Wadud MA, Rashid MMO. Increase in anionic Fe 3O 4 nanoparticle-induced membrane poration and vesicle deformation due to membrane potential - an experimental study. Phys Chem Chem Phys 2023; 25:23111-23124. [PMID: 37602684 DOI: 10.1039/d3cp02702c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
Abstract
The membrane potential plays a significant role in various cellular processes while interacting with membrane active agents. So far, all the investigations of the interaction of nanoparticles (NPs) with lipid vesicles have been performed in the absence of membrane potential. In this study, the anionic magnetite NP-induced poration along with deformation of cell-mimetic giant unilamellar vesicles (GUVs) has been studied in the presence of various membrane potentials. Lipids 1,2-dioleoyl-sn-glycero-3-phospho-(1'-rac-glycerol) (DOPG), 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC), and channel forming protein gramicidin A (GrA) are used to synthesize the DOPG/DOPC/GrA-GUVs. The static and dynamic nature of GUVs is investigated using phase contrast fluorescent microscopy. The presence of GrA in the membrane decreases the leakage constant of the encapsulating fluorescent probe (calcein) in the absence of membrane potential. With the increase of negative membrane potential, the leakage shifts from a single exponential to two exponential functions, obtaining two leakage constants. The leakage became faster at the initial stage, and at the final stage, it became slower with the increase in negative membrane potential. Both the fraction of poration and deformation increase with the increase of negative membrane potential. These results suggested that the membrane potential enhances the NP-induced poration along with the deformation of DOPG/DOPC/GrA-GUVs. The increase of the binding constant in the NPs with membrane potential is one of the important factors for increasing membrane permeation and vesicle deformation.
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Affiliation(s)
- Md Moniruzzaman
- Department of Physics, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh.
| | - Mohammad Abu Sayem Karal
- Department of Physics, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh.
| | - Md Abdul Wadud
- Department of Physics, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh.
| | - Md Mamun Or Rashid
- Department of Pharmacy, Noakhali Science and Technology University, Noakhali 3814, Bangladesh
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Pratihar S, Prasad E. Effect of positional isomerism on the excited state charge transfer dynamics of anthracene-based D-π-A systems. Phys Chem Chem Phys 2023; 25:5226-5236. [PMID: 36723193 DOI: 10.1039/d2cp03958c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Understanding the dynamics of the back electron transfer (BET) rate of ion pairs from the electronically excited state of donor-acceptor systems is crucial for developing materials for organic electronics. The structure-property relationships in the organic molecular architectures play a key role in controlling the BET rate and have been utilized as a criterion to design systems with a reduced BET rate. Here, we examine the influence of isomerism on the BET rate in anthracene based systems, viz., (E)-2-(2-(anthracen-9-yl)vinyl)benzonitrile (ortho-CN) and (E)-3-(2-(anthracen-9-yl)vinyl)benzonitrile (meta-CN) with N,N-diethylaniline (DEA) in methylcyclohexane using time-resolved spectroscopy. The radical cation (DEA˙+) and the radical anion (ortho-CN˙- or meta-CN˙-) generated after photoexcitation show synchronous decay kinetics, and the rate constant of back electron transfer (kBET) for the DEA/ortho-CN pair was 6.6 × 104 s-1, which is ca. 2 orders of magnitude lower compared with the DEA/meta-CN pair. The role of isomerism in providing resonance stabilization for the organic radicals is expected to have implications for strategies that retard charge recombination in photovoltaics. The role of the molecular structural features that dictate the kinetics for charge recombination has been further identified using quantum calculations.
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Affiliation(s)
- Swatilekha Pratihar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India.
| | - Edamana Prasad
- Department of Chemistry, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India.
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Abstract
The biological process of photosynthesis was critical in catalyzing the oxygenation of Earth’s atmosphere 2.5 billion years ago, changing the course of development of life on Earth. Recently, the fields of applied and synthetic photosynthesis have utilized the light-driven protein–pigment supercomplexes central to photosynthesis for the photocatalytic production of fuel and other various valuable products. The reaction center Photosystem I is of particular interest in applied photosynthesis due to its high stability post-purification, non-geopolitical limitation, and its ability to generate the greatest reducing power found in nature. These remarkable properties have been harnessed for the photocatalytic production of a number of valuable products in the applied photosynthesis research field. These primarily include photocurrents and molecular hydrogen as fuels. The use of artificial reaction centers to generate substrates and reducing equivalents to drive non-photoactive enzymes for valuable product generation has been a long-standing area of interest in the synthetic photosynthesis research field. In this review, we cover advances in these areas and further speculate synthetic and applied photosynthesis as photocatalysts for the generation of valuable products.
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Tulum I, Tahara YO, Miyata M. Peptidoglycan layer and disruption processes in Bacillus subtilis cells visualized using quick-freeze, deep-etch electron microscopy. Microscopy (Oxf) 2020; 68:441-449. [PMID: 31690940 DOI: 10.1093/jmicro/dfz033] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 08/08/2019] [Accepted: 08/08/2019] [Indexed: 12/22/2022] Open
Abstract
Peptidoglycan, which is the main component of the bacterial cell wall, is a heterogeneous polymer of glycan strands cross-linked with short peptides and is synthesized in cooperation with the cell division cycle. Although it plays a critical role in bacterial survival, its architecture is not well understood. Herein, we visualized the architecture of the peptidoglycan surface in Bacillus subtilis at the nanometer resolution, using quick-freeze, deep-etch electron microscopy (EM). Filamentous structures were observed on the entire surface of the cell, where filaments about 11 nm wide formed concentric circles on cell poles, filaments about 13 nm wide formed a circumferential mesh-like structure on the cylindrical part and a 'piecrust' structure was observed at the boundary. When growing cells were treated with lysozyme, the entire cell mass migrated to one side and came out from the cell envelope. Fluorescence labeling showed that lysozyme preferentially bound to a cell pole and cell division site, where the peptidoglycan synthesis was not complete. Ruffling of surface structures was observed during EM. When cells were treated with penicillin, the cell mass came out from a cleft around the cell division site. Outward curvature of the protoplast at the cleft seen using EM suggested that turgor pressure was applied as the peptidoglycan was not damaged at other positions. When muropeptides were depleted, surface filaments were lost while the rod shape of the cell was maintained. These changes can be explained on the basis of the working points of the chemical structure of peptidoglycan.
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Affiliation(s)
- Isil Tulum
- Graduate School of Science, Osaka City University, Osaka 558-8585, Japan.,The OCU Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University, Osaka 558-8585, Japan
| | - Yuhei O Tahara
- Graduate School of Science, Osaka City University, Osaka 558-8585, Japan.,The OCU Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University, Osaka 558-8585, Japan
| | - Makoto Miyata
- Graduate School of Science, Osaka City University, Osaka 558-8585, Japan.,The OCU Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University, Osaka 558-8585, Japan
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Usui Y, Wakabayashi Y, Shimizu T, Tahara YO, Miyata M, Nakamura A, Ito M. A Factor Produced by Kaistia sp. 32K Accelerated the Motility of Methylobacterium sp. ME121. Biomolecules 2020; 10:biom10040618. [PMID: 32316239 PMCID: PMC7226442 DOI: 10.3390/biom10040618] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 04/13/2020] [Accepted: 04/14/2020] [Indexed: 12/23/2022] Open
Abstract
Motile Methylobacterium sp. ME121 and non-motile Kaistia sp. 32K were isolated from the same soil sample. Interestingly, ME121 was significantly more motile in the coculture of ME121 and 32K than in the monoculture of ME121. This advanced motility of ME121 was also observed in the 32K culture supernatant. A swimming acceleration factor, which we named the K factor, was identified in the 32K culture supernatant, purified, characterized as an extracellular polysaccharide (5–10 kDa), and precipitated with 70% ethanol. These results suggest the possibility that the K factor was directly or indirectly sensed by the flagellar stator, accelerating the flagellar rotation of ME121. To the best of our knowledge, no reports describing an acceleration in motility due to coculture with two or more types of bacteria have been published. We propose a mechanism by which the increase in rotational force of the ME121 flagellar motor is caused by the introduction of the additional stator into the motor by the K factor.
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Affiliation(s)
- Yoshiaki Usui
- Graduate School of Life Sciences, Toyo University, Oura-gun, Gunma 374-0193, Japan; (Y.U.); (Y.W.)
| | - Yuu Wakabayashi
- Graduate School of Life Sciences, Toyo University, Oura-gun, Gunma 374-0193, Japan; (Y.U.); (Y.W.)
| | - Tetsu Shimizu
- Faculty of Life and Environmental Sciences, and Microbiology Research Center for Sustainability (MiCS), University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan; (T.S.); (A.N.)
| | - Yuhei O. Tahara
- Department of Biology, Graduate School of Science, Osaka City University, Osaka 558-8585, Japan; (Y.O.T.); (M.M.)
- The OCU Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University, Osaka 558-8585, Japan
| | - Makoto Miyata
- Department of Biology, Graduate School of Science, Osaka City University, Osaka 558-8585, Japan; (Y.O.T.); (M.M.)
- The OCU Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University, Osaka 558-8585, Japan
| | - Akira Nakamura
- Faculty of Life and Environmental Sciences, and Microbiology Research Center for Sustainability (MiCS), University of Tsukuba, Tsukuba, Ibaraki 305-8572, Japan; (T.S.); (A.N.)
| | - Masahiro Ito
- Graduate School of Life Sciences, Toyo University, Oura-gun, Gunma 374-0193, Japan; (Y.U.); (Y.W.)
- Bio-Nano Electronics Research Centre, Toyo University, Kawagoe, Saitama 350-8585, Japan
- Correspondence: ; Tel.: +81-273-82-9202
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Komatsu S, Nomiyama T, Numata T, Kawanami T, Hamaguchi Y, Iwaya C, Horikawa T, Fujimura-Tanaka Y, Hamanoue N, Motonaga R, Tanabe M, Inoue R, Yanase T, Kawanami D. SGLT2 inhibitor ipragliflozin attenuates breast cancer cell proliferation. Endocr J 2020; 67:99-106. [PMID: 31776304 DOI: 10.1507/endocrj.ej19-0428] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Cancer is currently one of the major causes of death in patients with type 2 diabetes mellitus. We previously reported the beneficial effects of the glucagon-like peptide-1 receptor agonist exendin-4 against prostate and breast cancer. In the present study, we examined the anti-cancer effect of the sodium-glucose cotransporter 2 (SGLT2) inhibitor ipragliflozin using a breast cancer model. In human breast cancer MCF-7 cells, SGLT2 expression was detected using both RT-PCR and immunohistochemistry. Ipragliflozin at 1-50 μM significantly and dose-dependently suppressed the growth of MCF-7 cells. BrdU assay also revealed that ipragliflozin attenuated the proliferation of MCF-7 cells in a dose-dependent manner. Because the effect of ipragliflozin against breast cancer cells was completely canceled by knocking down SGLT2, ipragliflozin could act via inhibiting SGLT2. We next measured membrane potential and whole-cell current using the patch clamp technique. When we treated MCF-7 cells with ipragliflozin or glucose-free medium, membrane hyperpolarization was observed. In addition, glucose-free medium and knockdown of SGLT2 by siRNA suppressed the glucose-induced whole-cell current of MCF-7 cells, suggesting that ipragliflozin inhibits sodium and glucose cotransport through SGLT2. Furthermore, JC-1 green fluorescence was significantly increased by ipragliflozin, suggesting the change of mitochondrial membrane potential. These findings suggest that the SGLT2 inhibitor ipragliflozin attenuates breast cancer cell proliferation via membrane hyperpolarization and mitochondrial membrane instability.
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Affiliation(s)
- Shiho Komatsu
- Department of Endocrinology and Diabetes Mellitus, School of Medicine, Fukuoka University, Fukuoka, Japan
| | - Takashi Nomiyama
- Department of Endocrinology and Diabetes Mellitus, School of Medicine, Fukuoka University, Fukuoka, Japan
- Research Institute for Islet Biology, Fukuoka University, Fukuoka, Japan
| | - Tomohiro Numata
- Department of Physiology, School of Medicine, Fukuoka University, Fukuoka, Japan
| | - Takako Kawanami
- Department of Endocrinology and Diabetes Mellitus, School of Medicine, Fukuoka University, Fukuoka, Japan
| | - Yuriko Hamaguchi
- Department of Endocrinology and Diabetes Mellitus, School of Medicine, Fukuoka University, Fukuoka, Japan
| | | | - Tsuyoshi Horikawa
- Department of Endocrinology and Diabetes Mellitus, School of Medicine, Fukuoka University, Fukuoka, Japan
| | - Yuki Fujimura-Tanaka
- Department of Endocrinology and Diabetes Mellitus, School of Medicine, Fukuoka University, Fukuoka, Japan
| | - Nobuya Hamanoue
- Department of Endocrinology and Diabetes Mellitus, School of Medicine, Fukuoka University, Fukuoka, Japan
| | - Ryoko Motonaga
- Department of Endocrinology and Diabetes Mellitus, School of Medicine, Fukuoka University, Fukuoka, Japan
| | - Makito Tanabe
- Department of Endocrinology and Diabetes Mellitus, School of Medicine, Fukuoka University, Fukuoka, Japan
| | - Ryuji Inoue
- Department of Physiology, School of Medicine, Fukuoka University, Fukuoka, Japan
| | - Toshihiko Yanase
- Research Institute for Islet Biology, Fukuoka University, Fukuoka, Japan
- Muta Hospital, Fukuoka, Japan
| | - Daiji Kawanami
- Department of Endocrinology and Diabetes Mellitus, School of Medicine, Fukuoka University, Fukuoka, Japan
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Qi G, Wang B, Zhang Y, Li H, Li C, Xu W, Jin Y. Living-Cell Imaging of Mitochondrial Membrane Potential Oscillation and Phenylalanine Metabolism Modulation during Periodic Electrostimulus. Anal Chem 2019; 91:9571-9579. [DOI: 10.1021/acs.analchem.9b00863] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Guohua Qi
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Bo Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, P. R. China
| | - Ying Zhang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
| | - Haijuan Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, P. R. China
| | - Chuanping Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Weiqing Xu
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Avenue, Changchun 130012, P. R. China
| | - Yongdong Jin
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
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Kim H, Nobeyama T, Honda S, Yasuda K, Morone N, Murakami T. Membrane fusogenic high-density lipoprotein nanoparticles. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2019; 1861:183008. [PMID: 31207206 DOI: 10.1016/j.bbamem.2019.06.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 05/23/2019] [Accepted: 06/11/2019] [Indexed: 11/30/2022]
Abstract
Membrane fusion under mildly acidic pH occurs naturally during viral infection in cells and has been exploited in the field of nanoparticle-mediated drug delivery to circumvent endosomal entrapment of the cargo. Herein, we aimed to confer virus-like fusogenic activity to HDL in the form of a ca. 10-nm disc comprising a discoidal lipid bilayer and two copies of a lipid-binding protein at the edge. A series of HDL mutants were prepared with a mixture of three lipids and a cell-penetrating peptide (TAT, penetratin, or Arg8) fused to the protein. In a lipid-mixing assay with anionic liposomes at pH 5.5, one HDL mutant showed the fusogenic activity higher than known fusogenic liposomes. In live mammalian cells, this HDL mutant showed high plasma membrane-binding activity in the presence of serum independent of pH. In the absence of serum, a mildly acidic pH dependency for binding to the plasma membrane and the subsequent lipid mixing between them was observed for this mutant. We propose a novel strategy to develop HDL-based drug carriers by taking advantage of the HDL lipid/protein composite structure.
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Affiliation(s)
- Hyungjin Kim
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University Institute for Advanced Study (KUIAS), Sakyo-ku, Kyoto 606-8501, Japan
| | - Tomohiro Nobeyama
- Department of Biotechnology, Graduate School of Engineering, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Shinnosuke Honda
- Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Kaori Yasuda
- Department of Biotechnology, Graduate School of Engineering, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan; Department of Pharmaceutical Engineering, Faculty of Engineering, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Nobuhiro Morone
- Medical Research Council Toxicology Unit, University of Cambridge, Leicester LE1 9HN, UK
| | - Tatsuya Murakami
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University Institute for Advanced Study (KUIAS), Sakyo-ku, Kyoto 606-8501, Japan; Department of Biotechnology, Graduate School of Engineering, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan; Department of Pharmaceutical Engineering, Faculty of Engineering, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan.
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9
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Zhao J, Lin Z, Fang S, Xie X, Wang H, Pang Z, Zhang J, Kong X, Lei M. Photoexcitation of self-n-doped fullerene ammonium halides: The role of halide ion and a possible synergistic dual-redox cycle mechanism within their aggregate. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.01.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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10
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Polino G, Lubrano C, Ciccone G, Santoro F. Photogenerated Electrical Fields for Biomedical Applications. Front Bioeng Biotechnol 2018; 6:167. [PMID: 30474026 PMCID: PMC6237932 DOI: 10.3389/fbioe.2018.00167] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Accepted: 10/23/2018] [Indexed: 12/11/2022] Open
Abstract
The application of electrical engineering principles to biology represents the main issue of bioelectronics, focusing on interfacing of electronics with biological systems. In particular, it includes many applications that take advantage of the peculiar optoelectronic and mechanical properties of organic or inorganic semiconductors, from sensing of biomolecules to functional substrates for cellular growth. Among these, technologies for interacting with bioelectrical signals in living systems exploiting the electrical field of biomedical devices have attracted considerable attention. In this review, we present an overview of principal applications of phototransduction for the stimulation of electrogenic and non-electrogenic cells focusing on photovoltaic-based platforms.
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Affiliation(s)
| | | | | | - Francesca Santoro
- Center for Advanced Biomaterials for Healthcare, Istituto Italiano di Tecnologia, Naples, Italy
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Bhattacharyya A, Pratihar S, Prasad E. Photoinduced electron transfer processes of (E)-9-(4-nitrostyryl)anthracene in non-polar solvent medium: generation of long-lived charge-separated states
$$^{\S }$$
§. J CHEM SCI 2018. [DOI: 10.1007/s12039-018-1555-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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12
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Zimmerman JF, Tian B. Nongenetic Optical Methods for Measuring and Modulating Neuronal Response. ACS NANO 2018; 12:4086-4095. [PMID: 29727159 PMCID: PMC6161493 DOI: 10.1021/acsnano.8b02758] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The ability to probe and modulate electrical signals sensitively at cellular length scales is a key challenge in the field of electrophysiology. Electrical signals play integral roles in regulating cellular behavior and in controlling biological function. From cardiac arrhythmias to neurodegenerative disorders, maladaptive phenotypes in electrophysiology can result in serious and potentially deadly medical conditions. Understanding how to monitor and to control these behaviors precisely and noninvasively represents an important step in developing next-generation therapeutic devices. As we develop a deeper understanding of neural network formation, electrophysiology has the potential to offer fundamental insights into the inner working of the brain. In this Perspective, we explore traditional methods for examining neural function, discuss recent genetic advances in electrophysiology, and then focus on the latest innovations in optical sensing and stimulation of action potentials in neurons. We emphasize nongenetic optical methods, as these provide high spatiotemporal resolution and can be achieved with minimal invasiveness.
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Affiliation(s)
- John F. Zimmerman
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - Bozhi Tian
- Department of Chemistry, the James Franck Institute, the Institute for Biophysical Dynamics, University of Chicago, Chicago, IL, USA
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13
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Takano Y, Munechika R, Biju V, Harashima H, Imahori H, Yamada Y. Optical control of mitochondrial reductive reactions in living cells using an electron donor-acceptor linked molecule. NANOSCALE 2017; 9:18690-18698. [PMID: 29165486 DOI: 10.1039/c7nr06310e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
It has been known for decades that intracellular redox reactions control various vital functions in living systems, which include the synthesis of biomolecules, the modulation of protein functions, and cell signaling. Although there have been several reports on the control of such functions using DNA and RNA, the non-invasive optical control of biological functions is an important ongoing challenge. In this study, a hybrid of an electron donor-acceptor linked molecule based on a ferrocene(Fc)-porphyrin(ZnP)-fullerene(C60) analogue and an elaborately designed nano-carrier, referred to herein as a MITO-Porter, resulted in a successful photoinduced intermolecular electron transfer reaction via the long-lived intramolecular charge separation, leading to site-specific reductive reactions in the mitochondria of living HeLa cells. A Fc-ZnP-C60 linked molecule, 1-Oct, was designed and prepared for taking advantage of the unique photophysical properties with excellent efficiency (i.e. a long lifetime and a high quantum yield) for photoinduced charge separation. The targeted delivery of 1-Oct to mitochondria was accomplished by using a combination of the Fc-ZnP-C60 molecule and a drug delivery nano-carrier, MITO-Porter, that was recently established by our group for intracellular cargo delivery. The successful delivery of 1-Oct by the MITO-Porter permitted the optically-controlled generation of O2- in the mitochondria of HeLa cells and the following induction of apoptosis as a cell signalling response was observed in confocal laser microscopy experiments. The obtained results indicate the use of an electron donor-acceptor system such as this can be a promising tool for the non-invasive triggering of redox-coupled cellular activities in living systems.
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Affiliation(s)
- Yuta Takano
- Research Institute for Electronic Science, Hokkaido University, Kita-20 Nishi-10, Kita-ku, Sapporo 001-0020, Japan.
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14
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Takano Y, Hanai E, Imahori H. Photoinduced electron transfer reaction in mitochondria for spatiotemporal selective photo-oxidation of lipids by donor/acceptor linked molecules. NANOSCALE 2017; 9:17909-17913. [PMID: 29124263 DOI: 10.1039/c7nr04919f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Donor-acceptor-linked molecules have been synthesized and utilized to induce the rapid and site-selective lipid-oxidation in mitochondria by utilizing a photoinduced intermolecular electron transfer reaction. Two water-soluble donor-acceptor molecules (1 and 2) were designed and synthesized for this purpose. 2 was prepared to modulate its affinity to cell membrane in mitochondria. Confocal laser microscopy experiments revealed that 1 and 2 possess high localization abilities in mitochondria. By the photoinduced electron transfer, 2 exhibited the remarkable oxidation ability of lipids, mainly cardiolipin. In HeLa cells, 2 triggered mitochondrial lipid oxidation, which was followed by apoptotic cell death, under illumination within a few seconds. These results show that the present molecular system is highly promising to utilize the photoinduced intermolecular electron transfer reaction in a precise spatiotemporal manner in a cell by using light.
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Affiliation(s)
- Yuta Takano
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan.
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15
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Fukuzumi S, Lee Y, Nam W. Artificial Photosynthesis for Production of ATP, NAD(P)H, and Hydrogen Peroxide. CHEMPHOTOCHEM 2017. [DOI: 10.1002/cptc.201700146] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Shunichi Fukuzumi
- Department of Chemistry and Nano Science Ewha Womans University Seoul 03760 Korea
- Graduate School of Science and Engineering Meijo University, Nagoya Aichi 468-8502 Japan
| | - Yong‐Min Lee
- Department of Chemistry and Nano Science Ewha Womans University Seoul 03760 Korea
| | - Wonwoo Nam
- Department of Chemistry and Nano Science Ewha Womans University Seoul 03760 Korea
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16
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Long lived charge separated states in vinylbenzonitrile substituted derivatives of pyrene and anthracene. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.03.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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17
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Hexaphyrin as a Potential Theranostic Dye for Photothermal Therapy and19F Magnetic Resonance Imaging. Chembiochem 2017; 18:951-959. [DOI: 10.1002/cbic.201700071] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Indexed: 12/26/2022]
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18
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Yue L, Weiland JD, Roska B, Humayun MS. Retinal stimulation strategies to restore vision: Fundamentals and systems. Prog Retin Eye Res 2016; 53:21-47. [DOI: 10.1016/j.preteyeres.2016.05.002] [Citation(s) in RCA: 173] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 05/13/2016] [Accepted: 05/21/2016] [Indexed: 11/28/2022]
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19
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Takano Y, Numata T, Fujishima K, Miyake K, Nakao K, Grove WD, Inoue R, Kengaku M, Sakaki S, Mori Y, Murakami T, Imahori H. Optical control of neuronal firing via photoinduced electron transfer in donor-acceptor conjugates. Chem Sci 2016; 7:3331-3337. [PMID: 29997826 PMCID: PMC6006863 DOI: 10.1039/c5sc04135j] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Accepted: 02/02/2016] [Indexed: 12/31/2022] Open
Abstract
A rationally designed donor–acceptor conjugate efficiently generates a photoinduced charge-separated state in a cellular environment, achieving photoinduction of neuronal firing.
A series of porphyrin–fullerene linked molecules has been synthesized to evaluate the effects of substituents and molecular structures on their charge-separation yield and the lifetime of a final charge-separated state in various hydrophilic environments. The selected high-performance molecule effectively achieved depolarization in a plasma cell membrane by visible light as well as two-photon excitation using a near-infrared light laser. Moreover, it was revealed that the depolarization can trigger neuronal firing in rat hippocampal neurons, demonstrating the potential and versatility for controlling cell functions using light.
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Affiliation(s)
- Yuta Takano
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS) , Kyoto University , Sakyo-ku , Kyoto 606-8501 , Japan .
| | - Tomohiro Numata
- Department of Physiology , Graduate School of Medical Sciences , Fukuoka University , Nanakuma 7-45-1, Johnan-ku , Fukuoka 814-0180 , Japan.,Department of Synthetic Chemistry and Biological Chemistry , Graduate School of Engineering , Kyoto University , Nishikyo-ku , Kyoto 615-8510 , Japan .
| | - Kazuto Fujishima
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS) , Kyoto University , Sakyo-ku , Kyoto 606-8501 , Japan .
| | - Kazuaki Miyake
- Department of Molecular Engineering , Graduate School of Engineering , Kyoto University , Nishikyo-ku , Kyoto 615-8510 , Japan .
| | - Kazuya Nakao
- Department of Molecular Engineering , Graduate School of Engineering , Kyoto University , Nishikyo-ku , Kyoto 615-8510 , Japan .
| | - Wesley David Grove
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS) , Kyoto University , Sakyo-ku , Kyoto 606-8501 , Japan .
| | - Ryuji Inoue
- Department of Physiology , Graduate School of Medical Sciences , Fukuoka University , Nanakuma 7-45-1, Johnan-ku , Fukuoka 814-0180 , Japan
| | - Mineko Kengaku
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS) , Kyoto University , Sakyo-ku , Kyoto 606-8501 , Japan .
| | - Shigeyoshi Sakaki
- Fukui Institute for Fundamental Chemistry , Kyoto University , Sakyo-ku , Kyoto 606-8103 , Japan
| | - Yasuo Mori
- Department of Synthetic Chemistry and Biological Chemistry , Graduate School of Engineering , Kyoto University , Nishikyo-ku , Kyoto 615-8510 , Japan .
| | - Tatsuya Murakami
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS) , Kyoto University , Sakyo-ku , Kyoto 606-8501 , Japan .
| | - Hiroshi Imahori
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS) , Kyoto University , Sakyo-ku , Kyoto 606-8501 , Japan . .,Department of Molecular Engineering , Graduate School of Engineering , Kyoto University , Nishikyo-ku , Kyoto 615-8510 , Japan .
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20
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Kim H, Okamoto H, Felber AE, Polomska A, Morone N, Heuser JE, Leroux JC, Murakami T. Polymer-coated pH-responsive high-density lipoproteins. J Control Release 2016; 228:132-140. [PMID: 26959846 DOI: 10.1016/j.jconrel.2016.03.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 02/22/2016] [Accepted: 03/03/2016] [Indexed: 02/01/2023]
Abstract
Intracellular drug delivery by nanoparticles is often hampered by their endosomal entrapment followed by their degradation in the lysosomal compartment and/or exocytosis. Here, we show that internalization and endosomal escape of cargoes in a cationized natural nanocarrier, high-density lipoprotein (HDL), can be controlled in a pH-dependent manner through stable complexation with a membranolytic anionic block polymer. A genetically and chemically cationized form of HDL (catHDL) is prepared for the first time by both genetic fusion with YGRKKRRQRRR peptide and incorporation of 1,2-dioleoyloxy-3-(trimethylammonium)propane. Upon addition of poly(ethylene glycol)-block-poly(propyl methacrylate-co-methacrylic acid) (PA), catHDL yields inhibition of internalization at neutral pH and its subsequent recovery at mildly acidic pH. catHDL forms a stable discoidal-shape complex with PA (catHDL/PA) (ca. 50 nm in diameter), even in the presence of serum. Significant enhancement of endosomal escape of a catHDL component is observed after a 1-h treatment of human cancer cells with catHDL/PA. Doxorubicin and curcumin, fluorescent anti-cancer drugs, encapsulated into catHDL/PA are also translocated outside of endosomes, compared with that into catHDL, and their cytotoxicities are enhanced inside the cells. These data suggest that catHDL/PA may have a potential benefit to improve the cellular delivery and endosomal escape of therapeutics under mildly acidic conditions such as in tumor tissues.
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Affiliation(s)
- Hyungjin Kim
- Institute for Integrated Cell-Material Science (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Haruki Okamoto
- Institute for Integrated Cell-Material Science (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Arnaud E Felber
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093 Zurich, Switzerland
| | - Anna Polomska
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093 Zurich, Switzerland
| | - Nobuhiro Morone
- Institute for Integrated Cell-Material Science (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - John E Heuser
- Institute for Integrated Cell-Material Science (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Jean-Christophe Leroux
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093 Zurich, Switzerland
| | - Tatsuya Murakami
- Institute for Integrated Cell-Material Science (WPI-iCeMS), Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan.
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21
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Dallas P, Rogers G, Reid B, Taylor RA, Shinohara H, Briggs GAD, Porfyrakis K. Charge separated states and singlet oxygen generation of mono and bis adducts of C60 and C70. Chem Phys 2016. [DOI: 10.1016/j.chemphys.2015.12.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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22
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Wei G, Yan M, Ma L, Wang C. Photothermal and photodynamic therapy reagents based on rGO–C6H4–COOH. RSC Adv 2016. [DOI: 10.1039/c5ra23986a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A photothermal and photodynamic therapy reagent based on rGO–C6H4–COOH was developed, which could effectively induce cancer cell apoptosis.
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Affiliation(s)
- Guangcheng Wei
- The Key Laboratory of Traditional Chinese Medicine Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine
- Binzhou Medical College
- Department of Pharmacy Science
- Yantai
- China
| | - Miaomiao Yan
- The Key Laboratory of Traditional Chinese Medicine Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine
- Binzhou Medical College
- Department of Pharmacy Science
- Yantai
- China
| | - Liying Ma
- The Key Laboratory of Traditional Chinese Medicine Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine
- Binzhou Medical College
- Department of Pharmacy Science
- Yantai
- China
| | - Chunhua Wang
- The Key Laboratory of Traditional Chinese Medicine Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine
- Binzhou Medical College
- Department of Pharmacy Science
- Yantai
- China
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23
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Affiliation(s)
- Sundus Erbas-Cakmak
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - David A. Leigh
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Charlie T. McTernan
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
| | - Alina
L. Nussbaumer
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, United Kingdom
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24
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25
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Murakami T, Okamoto H, Kim H. Internalization of High-density Lipoproteins Bearing Arginine-rich Peptides. CHEM LETT 2015. [DOI: 10.1246/cl.140989] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Tatsuya Murakami
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University
| | - Haruki Okamoto
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University
| | - Hyungjin Kim
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University
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26
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D'Souza F, Imahori H. Preface — Special Issue in Honor of Professor Shunichi Fukuzumi. J PORPHYR PHTHALOCYA 2015. [DOI: 10.1142/s1088424615020010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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27
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Murakami T, Nakatsuji H, Morone N, Heuser JE, Ishidate F, Hashida M, Imahori H. Mesoscopic metal nanoparticles doubly functionalized with natural and engineered lipidic dispersants for therapeutics. ACS NANO 2014; 8:7370-7376. [PMID: 24945782 DOI: 10.1021/nn5024818] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Surface engineering of mesoscopic metal nanoparticles to increase biocompatibility and cell interaction is important for improvement of their therapeutic properties. Here, we describe a strategy to stabilize mesoscopic metal nanoparticles and to enhance their cell interaction by stepwise addition of (Z)-9-octadecenoate (oleate) and a cell-penetrating peptide-fused high-density lipoprotein (cpHDL). Oleate replaces a cytotoxic dispersant on the surface of gold nanorods (AuNRs), which enables subsequent cpHDL binding without causing aggregation. Notably, these two lipidic dispersants are probably intercalated on the surface. This procedure was also used to stabilize 20 nm spherical gold nanoparticles and 40 nm aggregates of 10 nm magnetite nanoparticles. cpHDL-bound AuNRs were internalized greater than 80 times more efficiently than poly(ethylene glycol)-conjugated AuNRs and were able to elicit cancer cell photoablation.
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Affiliation(s)
- Tatsuya Murakami
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University , Sakyo-ku, Kyoto 606-8501, Japan
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28
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Aroua S, Schweizer WB, Yamakoshi Y. C60 Pyrrolidine Bis-carboxylic Acid Derivative as a Versatile Precursor for Biocompatible Fullerenes. Org Lett 2014; 16:1688-91. [DOI: 10.1021/ol500363r] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Safwan Aroua
- Laboratorium
für Organische
Chemie, ETH-Zürich, Vladimir-Prelog-Weg 3, CH-8093 Zürich, Switzerland
| | - W. Bernd Schweizer
- Laboratorium
für Organische
Chemie, ETH-Zürich, Vladimir-Prelog-Weg 3, CH-8093 Zürich, Switzerland
| | - Yoko Yamakoshi
- Laboratorium
für Organische
Chemie, ETH-Zürich, Vladimir-Prelog-Weg 3, CH-8093 Zürich, Switzerland
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29
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Shan F, Lu X, Guan J, Lu Q, Feng X. Airflow-field-induced sandwich-type membrane of block copolymer for selective ion separation. Macromol Rapid Commun 2014; 35:735-40. [PMID: 24497315 DOI: 10.1002/marc.201300880] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 01/02/2014] [Indexed: 11/09/2022]
Abstract
A simple and effective airflow method to prepare sandwich-type block copolymer films is reported. The films are composed of three layers: vertically oriented nanocylinders align in both upper and bottom layers and irregular nanocylinders exist in the bulk of the film. The vertically oriented nanocylinders in both sides can provide high accessibility to ions and ensures the exchange of chemical species between the membrane and external environment, while the irregularly oriented nanocylinders in the middle part of the film can prolong the pathway of ions transportation and enhance ions selectivity.
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Affiliation(s)
- Feng Shan
- School of Chemistry and Chemical Engineering, the State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China
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30
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Xie X, Bakker E. Creating electrochemical gradients by light: from bio-inspired concepts to photoelectric conversion. Phys Chem Chem Phys 2014; 16:19781-9. [DOI: 10.1039/c4cp02566k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Artificial light harvesting systems can be used to convert light into electrochemical gradients and photocurrents.
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Affiliation(s)
- Xiaojiang Xie
- Department of Inorganic and Analytical Chemistry
- University of Geneva
- Geneva, Switzerland
| | - Eric Bakker
- Department of Inorganic and Analytical Chemistry
- University of Geneva
- Geneva, Switzerland
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31
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Yoosaf K, Iehl J, Nierengarten I, Hmadeh M, Albrecht-Gary AM, Nierengarten JF, Armaroli N. A supramolecular photosynthetic model made of a multiporphyrinic array constructed around a C60 core and a C60-imidazole derivative. Chemistry 2013; 20:223-31. [PMID: 24318458 DOI: 10.1002/chem.201303481] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Indexed: 12/11/2022]
Abstract
The photophysical properties of a supramolecular fullerene-porphyrin ensemble resulting from the self-assembly of a pyrrolidinofullerene-imidazole derivative (F1) with a multimetalloporphyrin array constructed around a hexasubstituted fullerene core (F(ZnP)12) have been investigated. The fullerene hexa-adduct core of the host system does not play any active role in the cascade of photoinduced events of the supramolecular ensemble, indeed no intercomponent photoinduced processes could be observed in host F(ZnP)12. In contrast, upon axial coordination with the monosubstituted fullerene guest F1, a quantitative quenching of the fluorescence signal of the metalloporphyrins was observed for the supramolecular complex [F(ZnP)12(F1)n] both in polar and nonpolar solvents. In toluene, the supramolecular ensemble exhibits a charge transfer emission centered around nm, suggesting the occurrence of intramolecular face-to-face interactions of F1 with neighboring metalloporphyrin moieties within the self-assembled photoactive array. This mechanism is supported by the fact that a one order of magnitude increase in the binding constant was observed for the supramolecular complex [F(ZnP)12(F1)n] when compared with a reference system lacking the pyrrolidinofullerene unit. In benzonitrile, a long-lived charge-separated state (τ=0.3 μs) has been detected for the supramolecular adduct.
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Affiliation(s)
- K Yoosaf
- Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, Via Gobetti 101, 40129 Bologna (Italy); Present address: Photosciences and Photonics, Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695 019, Kerala (India)
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32
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Mathew S, Murakami T, Nakatsuji H, Okamoto H, Morone N, Heuser JE, Hashida M, Imahori H. Exclusive photothermal heat generation by a gadolinium bis(naphthalocyanine) complex and inclusion into modified high-density lipoprotein nanocarriers for therapeutic applications. ACS NANO 2013; 7:8908-8916. [PMID: 24053139 DOI: 10.1021/nn403384k] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A hydrophobic gadolinium bis(naphthalocyanine) sandwich complex (GdSand) possessing several absorbances across visible and infrared wavelengths (up to 2500 nm) was solubilized in aqueous solution by uptake into a nascent mutant high-density lipoprotein (HDL) nanocarrier. The HDL nanocarrier was additionally functionalized with a trans-activator of transcription peptide sequence to promote efficient cell penetration of the drug delivery system (cpHDL). The dye-loaded nanocarrier (GdSand@cpHDL) exhibited photothermal heat generation properties upon irradiation with near-infrared (NIR) laser light, with controllable heat generation abilities as a function of the incident laser light power. Comparison of the photothermal behavior of the dyes GdSand and the well-explored molecular photothermal agent indocyanine green (ICG) in the cpHDL nanocarrier (i.e., ICG@cpHDL) revealed two significant advantages of GdSand@cpHDL: (1) the ability to maintain elevated temperatures upon light absorption for extended periods of time, with a reduced degree of self-destruction of the dye, and (2) exclusive photothermal heat generation with no detectable singlet oxygen production leading to improved integrity of the cpHDL nanocarrier after irradiation. Finally, GdSand@cpHDL was successfully subjected to an in vitro study against NCI-H460 human lung cancer cells, demonstrating the proof-of-principle utility of lanthanide sandwich complexes in photothermal therapeutic applications.
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Affiliation(s)
- Simon Mathew
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University , Sakyo-ku, Kyoto 606-8501, Japan
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33
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Vecchi A, Galloni P, Floris B, Nemykin VN. New developments in chemistry of organometallic porphyrins and their analogs. J PORPHYR PHTHALOCYA 2013. [DOI: 10.1142/s1088424613300012] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In this mini-review, new developments in chemistry of organometallic porphyrins and their analogs reported between 2007 and mid 2012 have been discussed. Synthetic strategies for preparation, as well as properties of metallocenyl-type compounds in which organometallic substituents connected to the porphyrinoid via (i) axial coordination; (ii) covalent bond to meso- or β-pyrrolic position; or (iii) β,β′-fused into the aromatic system as well as porphyrinoids with organometallic fragments σ-bonded in η1-fashion were overviewed.
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Affiliation(s)
- Andrea Vecchi
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma "Tor Vergata", Via della Ricerca Scientifica, 00133 Rome, Italy
| | - Pierluca Galloni
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma "Tor Vergata", Via della Ricerca Scientifica, 00133 Rome, Italy
| | - Barbara Floris
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma "Tor Vergata", Via della Ricerca Scientifica, 00133 Rome, Italy
| | - Victor N. Nemykin
- Department of Chemistry & Biochemistry, 1039 University Drive, University of Minnesota Duluth, Duluth, MN 55812, USA
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34
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Rohan JG, Citron YR, Durrell AC, Cheruzel LE, Gray HB, Grubbs RH, Humayun M, Engisch KL, Pikov V, Chow RH. Light-triggered modulation of cellular electrical activity by ruthenium diimine nanoswitches. ACS Chem Neurosci 2013; 4:585-93. [PMID: 23419103 DOI: 10.1021/cn300213f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Ruthenium diimine complexes have previously been used to facilitate light-activated electron transfer in the study of redox metalloproteins. Excitation at 488 nm leads to a photoexcited state, in which the complex can either accept or donate an electron, respectively, in the presence of a soluble sacrificial reductant or oxidant. Here, we describe a novel application of these complexes in mediating light-induced changes in cellular electrical activity. We demonstrate that RubpyC17 ([Ru(bpy)(2)(bpy-C17)](2+), where bpy is 2,2'-bipyridine and bpy-C17 is 2,2'-4-heptadecyl-4'-methyl-bipyridine), readily incorporates into the plasma membrane of cells, as evidenced by membrane-confined luminescence. Excitable cells incubated in RubpyC17 and then illuminated at 488 nm in the presence of the reductant ascorbate undergo membrane depolarization leading to firing of action potentials. In contrast, the same experiment performed with the oxidant ferricyanide, instead of ascorbate, leads to hyperpolarization. These experiments suggest that illumination of membrane-associated RubpyC17 in the presence of ascorbate alters the cell membrane potential by increasing the negative charge on the outer face of the cell membrane capacitor, effectively depolarizing the cell membrane. We rule out two alternative explanations for light-induced membrane potential changes, using patch clamp experiments: (1) light-induced direct interaction of RubpyC17 with ion channels and (2) light-induced membrane perforation. We show that incorporation of RubpyC17 into the plasma membrane of neuroendocrine cells enables light-induced secretion as monitored by amperometry. While the present work is focused on ruthenium diimine complexes, the findings point more generally to broader application of other transition metal complexes to mediate light-induced biological changes.
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Affiliation(s)
- Joyce G. Rohan
- Department
of Physiology and Biophysics, Zilkha Neurogenetic Institute, Keck
School of Medicine, University of Southern California, Los Angeles, California 90089-2821, United States
- Wright State University, Dayton, Ohio 45435, United States
| | - Y. Rose Citron
- Department
of Physiology and Biophysics, Zilkha Neurogenetic Institute, Keck
School of Medicine, University of Southern California, Los Angeles, California 90089-2821, United States
| | | | - Lionel E. Cheruzel
- Department of Chemistry, San José State University, San José, California 95192-0101, United States
| | | | | | - Mark Humayun
- Doheny Eye Institute, Keck School
of Medicine, University of Southern California, Los Angeles, California 90033, United States
| | | | - Victor Pikov
- Huntington Medical Research Institute, Pasadena, California 91105, United States
| | - Robert H. Chow
- Department
of Physiology and Biophysics, Zilkha Neurogenetic Institute, Keck
School of Medicine, University of Southern California, Los Angeles, California 90089-2821, United States
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