201
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Hasegawa T. Understanding of the intrinsic difference between normal- and perfluoro-alkyl compounds toward total understanding of material properties. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2015.03.046] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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202
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Mousavi MR, Maghsoodlou MT, Gharari H, Hazeri N. Reaction of pentafluoropyridine with oxime nucleophiles via SNAr reactions for preparation of new p-substituted tetrafluoropyridyl derivatives. MONATSHEFTE FUR CHEMIE 2015. [DOI: 10.1007/s00706-015-1459-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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203
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Medicinal applications of perfluoroalkylated chain-containing compounds. Future Med Chem 2015; 6:1201-29. [PMID: 25078138 DOI: 10.4155/fmc.14.53] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Compounds with polyfluorinated molecular fragments possess unique properties associated with the presence of a large number of fluorine atoms that affect lipophilicity and conformational rigidity of the parent molecule along with other effects. The aim of this review is to provide an overview of synthesized compounds possessing perfluoroalkylated or polyfluorinated chains that have been tested for bioactivity or as potential drug candidates for the treatment of various diseases. As far as the length of the perfluoroalkylated chain is concerned the focus is centered on the compound bearing perfluoroethyl or tetrafluoroethyl as well as longer chains. The perfluoroalkylated compounds discussed are classified according to their biological activity.
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204
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Tsagogiorgas C, Theisinger S, Heesch E, Krebs J, Holm R, Beck G, Yard B. Evaluation of pharmacokinetic properties and anaesthetic effects of propofol in a new perfluorohexyloctane (F6H8) emulsion in rats--A comparative study. Int J Pharm 2015; 486:69-76. [PMID: 25797054 DOI: 10.1016/j.ijpharm.2015.03.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 03/13/2015] [Accepted: 03/16/2015] [Indexed: 12/01/2022]
Abstract
Propofol (2,6-diisopropylphenol) is a safe and widely used anaesthetic, but due to low water solubility and high lipophilicity a difficult compound to formulate. The solubility of propofol in the semifluorinated alkane perfluorohexyloctane (F6H8) is very high (>300 mg/ml). In the present work we investigate if a F6H8-based emulsion could be used as a new intravenous drug delivery system for propofol from a pharmacokinetic, pharmacodynamic and safety point of view. The pharmacokinetic parameters were evaluated after an intravenous bolus injection of either Disoprivan(®) or a F6H8-based propofol emulsion in Wistar rats. The onset and end of sedation after multiple dosings (5, 10 and 15 mg/kg bw) were examined. Clinical chemistry and histology were assessed. No significant difference was found for any of the pharmacokinetic parameters. No differences in the onset nor the end of sedation in the tested dosages could be detected. Histology scores revealed no differences. A slightly increased alanine aminotransferase (ALT) was measured after multiple application of the F6H8-propofol emulsion. In conclusion, the F6H8-propofol emulsion showed no significant different pharmacokinetics and sedation properties, compared to a commercial soy-based propofol emulsion. Further, no toxic effects could be detected on the F6H8 emulsion indicating it was a safe excipient in rats.
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Affiliation(s)
- Charalambos Tsagogiorgas
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Centre Mannheim, Medical Faculty Mannheim of the University of Heidelberg, Mannheim, Germany.
| | | | - Elisabeth Heesch
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Centre Mannheim, Medical Faculty Mannheim of the University of Heidelberg, Mannheim, Germany
| | - Jörg Krebs
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Centre Mannheim, Medical Faculty Mannheim of the University of Heidelberg, Mannheim, Germany
| | - René Holm
- Biologics and Pharmaceutical Science, H.Lundbeck A/S, DK-2500 Valby, Denmark
| | - Grietje Beck
- Department of Anaesthesiology and Intensive Care Medicine, University Medical Centre Mannheim, Medical Faculty Mannheim of the University of Heidelberg, Mannheim, Germany
| | - Benito Yard
- Department of Medicine V, University Medical Centre Mannheim, Medical Faculty Mannheim of the University of Heidelberg, Mannheim, Germany
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205
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Perfluoroalkylated poly(oxyethylene) thiols: Synthesis, adsorption dynamics and surface activity at the air/water interface, and bubble stabilization behaviour. J Fluor Chem 2015. [DOI: 10.1016/j.jfluchem.2014.10.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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206
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Wu YC, Leowanawat P, Sun HJ, Partridge BE, Peterca M, Graf R, Spiess HW, Zeng X, Ungar G, Hsu CS, Heiney PA, Percec V. Complex Columnar Hexagonal Polymorphism in Supramolecular Assemblies of a Semifluorinated Electron-Accepting Naphthalene Bisimide. J Am Chem Soc 2015; 137:807-19. [DOI: 10.1021/ja510643b] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Yu-Chun Wu
- Roy
and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Pawaret Leowanawat
- Roy
and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Hao-Jan Sun
- Roy
and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
- Department
of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6396, United States
| | - Benjamin E. Partridge
- Roy
and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Mihai Peterca
- Roy
and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Robert Graf
- Max-Planck Institute for Polymer Research, 55128 Mainz, Germany
| | - Hans W. Spiess
- Max-Planck Institute for Polymer Research, 55128 Mainz, Germany
| | - Xiangbing Zeng
- Department
of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, United Kingdom
| | - Goran Ungar
- Department
of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, United Kingdom
- Department
of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Chain-Shu Hsu
- Department
of Applied Chemistry, National Chiao Tung University, Hsin-Chu 30049, Taiwan
| | - Paul A. Heiney
- Department
of Physics and Astronomy, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6396, United States
| | - Virgil Percec
- Roy
and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
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207
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Lucio AA, Ingber DE, Campàs O. Generation of biocompatible droplets for in vivo and in vitro measurement of cell-generated mechanical stresses. Methods Cell Biol 2015; 125:373-90. [PMID: 25640439 DOI: 10.1016/bs.mcb.2014.11.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Here we describe a detailed protocol to produce biocompatible droplets that permit the measurement of mechanical stresses at cell and tissue scales. The droplets can be used as force transducers in vivo, ex vivo, and in vitro, to measure mechanical stresses in situ, in three dimensions and time. Versatile and modular droplet coatings using biotinylated molecules, such as ligands for specific adhesion receptors, enable the targeting of specific tissues or cells. Droplet sizes can be varied to measure forces at different scales (tissue and cell scales) and the range of measurable mechanical stresses ranges within approximately 0.3-100 kPa. The protocol described in this chapter is divided in three sections. First, we describe the generation and stabilization of biocompatible droplets. Next, we explain the steps necessary to functionalize the droplet surface. Finally, we describe how to characterize the mechanical properties of the droplets, so that they can be used as calibrated mechanical probes. The procedure to generate, stabilize, and functionalize the droplets is straightforward and can be completed in about 3h with basic laboratory resources. The calibration of the droplet's mechanical properties to perform quantitative stress measurements is also straightforward, but requires the proper equipment to measure interfacial tension (such as a tensiometer). Calibrated droplets can be used to quantify cell-generated mechanical stresses by analyzing the tridimensional shape of the droplet.
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Affiliation(s)
- Adam A Lucio
- Department of Mechanical Engineering, University of California, Santa Barbara, CA, USA
| | - Donald E Ingber
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Otger Campàs
- Department of Mechanical Engineering, University of California, Santa Barbara, CA, USA
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208
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Francis DV, Harper JB, Read RW. Fluorous 1,2,3-Triazol-4-ylmethyl Amines and Amine Derivatives for Novel Surfactant Applications. Aust J Chem 2015. [DOI: 10.1071/ch14458] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A series of fluorous surfactants with additional functionality were generated through the attachment of substituents at the amino nitrogen atom of the surfactant moiety. Examples of molecules containing one and two triazole ring systems were synthesized through N-alkylation and N-acylation strategies.
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209
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Koda Y, Terashima T, Sawamoto M, Maynard HD. Amphiphilic/fluorous random copolymers as a new class of non-cytotoxic polymeric materials for protein conjugation. Polym Chem 2015. [DOI: 10.1039/c4py01346h] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Amphiphilic/fluorous random copolymers bearing poly(ethylene glycol) chains and perfluorinated alkane pendants were developed as novel non-cytotoxic polymeric materials for protein conjugation.
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Affiliation(s)
- Yuta Koda
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Takaya Terashima
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Mitsuo Sawamoto
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Heather D. Maynard
- Department of Chemistry and Biochemistry
- University of California
- Los Angeles
- USA
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210
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Tsutsui Y, Sakurai T, Kato K, Takata M, Seki S. Side Chain-Directed Assembly of Large Discotic π-Conjugated Molecules: Toward Tuning and Stabilization of Mesophases. J PHOTOPOLYM SCI TEC 2015. [DOI: 10.2494/photopolymer.28.583] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yusuke Tsutsui
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University
| | - Tsuneaki Sakurai
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University
| | | | | | - Shu Seki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University
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211
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KODA Y, TERASHIMA T, SAWAMOTO M. Design and Functions of Fluorous Nanospaces with Microgel Star Polymers and Amphiphilic Random Copolymers. KOBUNSHI RONBUNSHU 2015. [DOI: 10.1295/koron.2015-0066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yuta KODA
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University
| | - Takaya TERASHIMA
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University
| | - Mitsuo SAWAMOTO
- Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University
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212
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Lin CXC, Jambhrunkar S, Yuan P, Zhou CHC, Zhao GXS. Design and synthesis of periodic mesoporous organosilica materials with a multi-compartment structure. RSC Adv 2015. [DOI: 10.1039/c5ra16497d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Multi-compartment periodic mesoporous organosilica materials show desirable properties as anticancer drug carrier with high loading capacity and slow release rate.
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Affiliation(s)
- Chun Xiang Cynthia Lin
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
| | - Siddharth Jambhrunkar
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
| | - Pei Yuan
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum
- Beijing 102249
- China
| | - Chun Hui Clayton Zhou
- Research Group for Advanced Materials & Sustainable Catalysis (AMSC), College of Chemical Engineering
- Zhejiang University of Technology
- Hangzhou
- China
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213
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Hu Y, Marlow JB, Ramanathan R, Zou W, Tiew HG, Pottage MJ, Bansal V, Tabor RF, Wilkinson BL. Synthesis and Properties of Photoswitchable Carbohydrate Fluorosurfactants. Aust J Chem 2015. [DOI: 10.1071/ch15434] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
We describe the parallel synthesis, photocontrollable surface tension, and antibacterial performance of a new class of carbohydrate fluorosurfactant. Novel fluorosurfactants comprised a mono- or disaccharide head group linked to an azobenzene unit that was variably substituted with a trifluoromethyl group. Fluorosurfactants were rapidly assembled using the venerable CuI-catalysed azide–alkyne cycloaddition reaction and exhibited light-addressable surface activity, excellent water solubility, and selective antibacterial activity against Gram-positive Staphylococcus aureus. Notably, the physicochemical and biological activity of these novel materials was heavily dependent on the nature of the head group and the position of the trifluoromethyl substituent on the azobenzene ring. The UV-adapted cis-isomer of fluorosurfactants displayed good thermal stability at ambient temperature, with little reversion to the stable trans isomer after 16 h. These novel, light-responsive materials should find broad interest in a range of biomedical and technological fields, including drug and gene delivery, self-cleaning oleophobic surfaces, and antibacterial coatings for medical devices.
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214
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Lapčík J, Gimello O, Ladmiral V, Friesen CM, Ameduri B. A new oligo(hexafluoropropylene oxide)-b-oligo(ethylene oxide) diblock surfactant obtained by radical reactions. Polym Chem 2015. [DOI: 10.1039/c4py00965g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The synthesis and characterization of a new oligo(hexafluoropropylene oxide)-b-oligo(ethylene oxide), oligo(HFPO)-b-oligo(PEG), diblock co-oligomer are presented.
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Affiliation(s)
- Jiří Lapčík
- Department of Organic Chemistry
- Institute of Chemical Technology Prague
- 166 28 Prague 6
- Czech Republic
- Ingenierie et Architectures Macromoleculaires
| | - Olinda Gimello
- Ingenierie et Architectures Macromoleculaires
- Institut Charles Gerhardt
- Ecole Nationale Supérieure de Chimie de Montpellier (UMR5253-CNRS)
- 34296 Montpellier Cedex 5
- France
| | - Vincent Ladmiral
- Ingenierie et Architectures Macromoleculaires
- Institut Charles Gerhardt
- Ecole Nationale Supérieure de Chimie de Montpellier (UMR5253-CNRS)
- 34296 Montpellier Cedex 5
- France
| | | | - Bruno Ameduri
- Ingenierie et Architectures Macromoleculaires
- Institut Charles Gerhardt
- Ecole Nationale Supérieure de Chimie de Montpellier (UMR5253-CNRS)
- 34296 Montpellier Cedex 5
- France
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215
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Jochyms Q, Guillot P, Mignard E, Vincent JM. A fluorosurfactant and photoreducible CuII-tren click catalyst: surfactant and catalytic properties at liquid/liquid interfaces. Dalton Trans 2015; 44:19700-7. [DOI: 10.1039/c5dt02039e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The fluorous copper(ii)-tren complex2is a powerful surfactant which strongly reduces the perfluorodecalin/water and diisopropyl ether/water interface tensions. When photoreduced by light it catalyzes the Huisgen click cycloaddition.
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216
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Koda Y, Terashima T, Sawamoto M. Fluorinated microgel star polymers as fluorous nanocapsules for the encapsulation and release of perfluorinated compounds. Polym Chem 2015. [DOI: 10.1039/c5py00113g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Fluorinated microgel star polymers work as fluorous nanocapsules to efficiently capture and thermo-responsively release perfluorinated guest compounds.
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Affiliation(s)
- Yuta Koda
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Takaya Terashima
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Mitsuo Sawamoto
- Department of Polymer Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
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217
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Tsourtou FD, Alexiadis O, Mavrantzas VG, Kolonias V, Housos E. Atomistic Monte Carlo and molecular dynamics simulation of the bulk phase self-assembly of semifluorinated alkanes. Chem Eng Sci 2015. [DOI: 10.1016/j.ces.2014.09.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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218
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Fontaine P, Fauré MC, Bardin L, Filipe EJM, Goldmann M. Evidence for interaction with the water subphase as the origin and stabilization of nano-domain in semi-fluorinated alkanes monolayer at the air/water interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:15193-15199. [PMID: 25425120 DOI: 10.1021/la5038124] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Multilayer films of semifluorinated alkanes (SFAs) at the air/water interface were studied in situ by grazing incidence small-angle X-ray scattering (GISAXS). The results provide evidence that the first layer in contact with the water subphase, buried below the overlayers, exhibits the same supramolecular hexagonal structure that is observed in the monolayer before the collapse, at non-zero surface pressure. We believe this result clearly demonstrates the major role of the interactions between the first layer of SFAs and the water subphase to the formation of the structure.
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Affiliation(s)
- Philippe Fontaine
- Synchrotron SOLEIL , L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette, France
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219
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Sheng N, Li J, Liu H, Zhang A, Dai J. Interaction of perfluoroalkyl acids with human liver fatty acid-binding protein. Arch Toxicol 2014; 90:217-27. [DOI: 10.1007/s00204-014-1391-7] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 10/15/2014] [Indexed: 01/09/2023]
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220
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Krafft MP. Perfluoroalkyl chains as tools for film surface nano-patterning and soft microbubble engineering and decoration. J Taiwan Inst Chem Eng 2014. [DOI: 10.1016/j.jtice.2014.06.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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221
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Koda Y, Terashima T, Sawamoto M. Fluorous Microgel Star Polymers: Selective Recognition and Separation of Polyfluorinated Surfactants and Compounds in Water. J Am Chem Soc 2014; 136:15742-8. [DOI: 10.1021/ja508818j] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yuta Koda
- Department of Polymer Chemistry,
Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Takaya Terashima
- Department of Polymer Chemistry,
Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Mitsuo Sawamoto
- Department of Polymer Chemistry,
Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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222
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Tirotta I, Dichiarante V, Pigliacelli C, Cavallo G, Terraneo G, Bombelli FB, Metrangolo P, Resnati G. (19)F magnetic resonance imaging (MRI): from design of materials to clinical applications. Chem Rev 2014; 115:1106-29. [PMID: 25329814 DOI: 10.1021/cr500286d] [Citation(s) in RCA: 340] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ilaria Tirotta
- Laboratory of Nanostructured Fluorinated Materials (NFMLab), Department of Chemistry, Materials, and Chemical Engineering "Giulio Natta" and ‡Fondazione Centro Europeo Nanomedicina, Politecnico di Milano , Milan 20131, Italy
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223
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von Rudorff GF, Watermann T, Sebastiani D. Perfluoroalkane force field for lipid membrane environments. J Phys Chem B 2014; 118:12531-40. [PMID: 25275859 DOI: 10.1021/jp507464m] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In this work, we present atomic parameters of perfluoroalkanes for use within the CHARMM force field. Perfluorinated alkanes represent a special class of molecules. On the one hand, they are considerably more hydrophobic than lipids, but on the other hand, they are not lipophilic either. Instead, they represent an independent class of philicity, enabling a whole portfolio of applications within both materials science and biochemistry. We performed a thorough parametrization of all bonded and nonbonded parameters with a particular focus on van der Waals parameters. Here, the general framework of the CHARMM and CGenFF force fields has been followed. The van der Waals parameters have been fitted to experimental densities over a wide range of temperatures and pressures. This newly parametrized class of molecules will open the gate for a variety of simulations of biologically relevant systems within the CHARMM force field. A particular perspective for the present work is the influence of polyphilic transmembrane molecules on membrane properties, aggregation phenomena, and transmembrane channels.
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Affiliation(s)
- Guido Falk von Rudorff
- Dahlem Center for Complex Quantum Systems, Freie Universität Berlin , Arnimallee 14, 14195 Berlin, Germany
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224
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Bazhin DN, Chizhov DL, Röschenthaler GV, Kudyakova YS, Burgart YV, Slepukhin PA, Saloutin VI, Charushin VN. A concise approach to CF3-containing furan-3-ones, (bis)pyrazoles from novel fluorinated building blocks based on 2,3-butanedione. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.08.046] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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225
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Martin A, Mügge C, Gin DL, Donnio B, Weigand W. Combined Stabilizing Effects of Trifluoromethyl Groups and Semifluorinated Side Chains on the Thermotropic Liquid-Crystal Behavior of β-Enamino Ketone Ligands and Their Bischelate PdIIComplexes. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402489] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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226
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Baba T, Takai K, Takagi T, Kanamori T. Effect of the fluorination degree of hydrophobic chains on the monolayer behavior of unsaturated diacylphosphatidylcholines bearing partially fluorinated 9-octadecynoyl (stearoloyl) groups at the air-water interface. Colloids Surf B Biointerfaces 2014; 123:246-53. [PMID: 25264284 DOI: 10.1016/j.colsurfb.2014.09.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 09/09/2014] [Accepted: 09/13/2014] [Indexed: 01/12/2023]
Abstract
The effect of the fluorination degree of hydrophobic chains on the monolayer behavior of unsaturated diacylphosphatidylcholines (PCs) was examined by employing a series of PCs bearing partially fluorinated 9-octadecynoyl (stearoloyl) groups (DFnStPCs, n: the number of fluorinated carbon atoms in a stearoloyl group; n=1, 2, 4, 8), including their hydrophobic parts--partially fluorinated stearolic acids (FnStAs)--at the air-water interface. π-A isotherm measurements and Brewster angle microscope observations revealed: (i) all DFnStPCs including FnStAs form monolayers of liquid character at 25 °C; (ii) they form more expanded monolayers than their non-fluorinated counterparts, distearoloyl-PC (DStPC) and stearolic acid, while the monolayer stability increases with n; (iii) compared with DStPC and DF8StPC, DFnStPCs (n=1, 2, 4) in the low-π region tend to show a weakening in their self-aggregation property and an increase in the work required for monolayer compression; (iv) although DF8StPC forms the most expanded monolayer, the behavior of DF8StPC resembles that of DStPC rather than that of DFnStPCs (n=1, 2, 4). The monolayer behavior of DFnStPCs (n=1, 2, 4) is explained by postulating a flatly-lying conformation of hydrophobic chains, in which three polar parts (ester group, triple bond, CF2-CH2 linkage) in chains are immersed in the subphase at large areas. DStPC and DF8StPC lacking a CF2-CH2 linkage, however, do not likely adopt such a conformation.
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Affiliation(s)
- Teruhiko Baba
- Research Center of Advanced Bionics (RCAB), National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan.
| | - Katsuki Takai
- Research Center of Advanced Bionics (RCAB), National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan
| | - Toshiyuki Takagi
- Research Center of Advanced Bionics (RCAB), National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan
| | - Toshiyuki Kanamori
- Research Center of Advanced Bionics (RCAB), National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 5, 1-1-1 Higashi, Tsukuba 305-8565, Japan
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227
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Semifluorinated alkanes as a liquid drug carrier system for topical ocular drug delivery. Eur J Pharm Biopharm 2014; 88:123-8. [DOI: 10.1016/j.ejpb.2014.05.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 05/06/2014] [Accepted: 05/09/2014] [Indexed: 02/05/2023]
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228
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Tahara K, Katayama K, Blunt MO, Iritani K, De Feyter S, Tobe Y. Functionalized surface-confined pores: guest binding directed by lateral noncovalent interactions at the solid-liquid interface. ACS NANO 2014; 8:8683-8694. [PMID: 25089732 DOI: 10.1021/nn503815q] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We present here the construction of self-assembled two-dimensional (2D) molecular networks that contain pores equipped with functional groups that promote guest-specific binding at the liquid/solid interface. For this purpose, a dehydrobenzo[12]annulene (DBA) derivative, DBA-F, having perfluoroalkyl groups at the end of the three alternating alkoxy chains connected by para-phenylene linkers was synthesized. For comparison DBA-H, having the same carbon backbone without fluorine substituents, was also prepared. STM observations revealed that these molecules formed porous 2D networks whose pores were decorated with either fluoroalkane or simple alkane perimeters. Hexakis(phenylethynyl)benzene, HPEB, and its octadecafluoro derivative, HPEB-F surrounded by 18 fluorine atoms, were employed as planar guest molecules of suitable size. The fluoroalkane-lined pores present in the network of DBA-F exhibited good binding ability toward both guest molecules via fluorophilicity and electrostatic interaction, respectively. In contrast the binding ability of the alkane-lined pore of the network of DBA-H for the fluorinated guest HPEB-F was poor as a result of weaker electrostatic interaction. Interestingly, with HPEB as a guest, this network underwent a periodical structural deformation through an induced-fit mechanism to form a superlattice structure consisting of free and occupied pores. These observations are discussed based on modeling experiments using molecular mechanics and quantum chemical methods to elucidate the roles of lateral noncovalent interactions and size matching between the pore and the guest molecules used for 2D guest binding.
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229
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Voet VSD, ten Brinke G, Loos K. Well-defined copolymers based on poly(vinylidene fluoride): From preparation and phase separation to application. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27340] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Vincent S. D. Voet
- Department of Polymer Chemistry; Zernike Institute for Advanced Materials, University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Gerrit ten Brinke
- Department of Polymer Chemistry; Zernike Institute for Advanced Materials, University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Katja Loos
- Department of Polymer Chemistry; Zernike Institute for Advanced Materials, University of Groningen; Nijenborgh 4 9747 AG Groningen The Netherlands
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230
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Wang Z, Cousins IT, Scheringer M, Buck RC, Hungerbühler K. Global emission inventories for C4-C14 perfluoroalkyl carboxylic acid (PFCA) homologues from 1951 to 2030, part II: the remaining pieces of the puzzle. ENVIRONMENT INTERNATIONAL 2014; 69:166-76. [PMID: 24861268 DOI: 10.1016/j.envint.2014.04.006] [Citation(s) in RCA: 148] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 04/10/2014] [Accepted: 04/11/2014] [Indexed: 05/17/2023]
Abstract
We identify eleven emission sources of perfluoroalkyl carboxylic acids (PFCAs) that have not been discussed in the past. These sources can be divided into three groups: [i] PFCAs released as ingredients or impurities, e.g., historical and current use of perfluorobutanoic acid (PFBA), perfluorohexanoic acid (PFHxA) and their derivatives; [ii] PFCAs formed as degradation products, e.g., atmospheric degradation of some hydrofluorocarbons (HFCs) and hydrofluoroethers (HFEs); and [iii] sources from which PFCAs are released as both impurities and degradation products, e.g., historical and current use of perfluorobutane sulfonyl fluoride (PBSF)- and perfluorohexane sulfonyl fluoride (PHxSF)-based products. Available information confirms that these sources were active in the past or are still active today, but due to a lack of information, it is not yet possible to quantify emissions from these sources. However, our review of the available information on these sources shows that some of the sources may have been significant in the past (e.g., the historical use of PFBA-, PFHxA-, PBSF- and PHxSF-based products), whereas others can be significant in the long-term (e.g., (bio)degradation of various side-chain fluorinated polymers where PFCA precursors are chemically bound to the backbone). In addition, we summarize critical knowledge and data gaps regarding these sources as a basis for future research.
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Affiliation(s)
- Zhanyun Wang
- Institute for Chemical and Bioengineering, ETH Zurich, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich, Switzerland
| | - Ian T Cousins
- Department of Applied Environmental Science (ITM), Stockholm University, SE-10691 Stockholm, Sweden
| | - Martin Scheringer
- Institute for Chemical and Bioengineering, ETH Zurich, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich, Switzerland.
| | - Robert C Buck
- E.I. du Pont de Nemours & Co. Inc., DuPont Chemicals and Fluoroproducts, 974 Centre Road, CRP 702-2211B, Wilmington, DE 19880-0702, USA
| | - Konrad Hungerbühler
- Institute for Chemical and Bioengineering, ETH Zurich, Wolfgang-Pauli-Strasse 10, CH-8093 Zürich, Switzerland
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231
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Fluoro- vs hydrocarbon surfactants: why do they differ in wetting performance? Adv Colloid Interface Sci 2014; 210:65-71. [PMID: 24814169 DOI: 10.1016/j.cis.2014.04.003] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 04/03/2014] [Accepted: 04/04/2014] [Indexed: 11/21/2022]
Abstract
Fluorosurfactants are the most effective compounds to lower the surface tension of aqueous solutions, but their wetting properties as related to low energy hydrocarbon solids are inferior to hydrocarbon trisiloxane surfactants, although the latter demonstrate higher surface tension in aqueous solutions. To explain this inconsistency available data on the adsorption of fluorosurfactants on liquid/vapour, solid/liquid and solid/vapour interfaces are discussed in comparison to those of hydrocarbon surfactants. The low free energy of adsorption of fluorosurfactants on hydrocarbon solid/water interface should be of a substantial importance for their wetting properties.
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232
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Hasegawa T, Shimoaka T, Shioya N, Morita K, Sonoyama M, Takagi T, Kanamori T. Stratified Dipole-Arrays Model Accounting for Bulk Properties Specific to Perfluoroalkyl Compounds. Chempluschem 2014. [DOI: 10.1002/cplu.201402156] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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233
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Kovalenko A, Jouhannaud J, Polavarapu P, Krafft MP, Waton G, Pourroy G. Hollow magnetic microspheres obtained by nanoparticle adsorption on surfactant stabilized microbubbles. SOFT MATTER 2014; 10:5147-5156. [PMID: 24909785 DOI: 10.1039/c4sm00318g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on the stabilization of nanoparticle-decorated microbubbles for long periods of time using a synergism between a soluble surfactant and nanoparticles. The soluble surfactant is the perfluoroalkyl phosphate C8F17(CH2)2OP(O)(OH)2 (labeled F8H2Phos) and the nanoparticles (NPs) are 20-25 nm cobalt ferrite (CoFe2O4). The NP-F8H2Phos system has been studied by dynamic light scattering, dynamic magnetic susceptibility measurements and thermal gravimetric analysis. Microbubbles with diameters in the 1-20 μm range have been stabilized in 0.1 M NaCl brine. Its presence is crucial for the long-term stabilization. The surfactant adsorbs rapidly on bubbles and slows down the bubble shrinkage. Thus, the NPs can attach to the bubble and form a hollow sphere with a rigid shell. The charge screening by NaCl favors the attachment of NPs to the bubble surface. The coverage of the bubbles by the CoFe2O4 nanoparticle layer is confirmed by thermally induced inflation-deflation experiments and the control of bubbles with a magnetic field.
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Affiliation(s)
- Artem Kovalenko
- Institut Charles Sadron (ICS) CNRS - Université de Strasbourg (UPR 22), 23 rue du Loess, BP 84047, 67034 Strasbourg Cedex 2, France
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234
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Zhang M, Badal MMR, Pasikowska M, Sonoda T, Mishima M, Fukaya H, Ono T, Siehl HU, Abboud JLM, Koppel IA. Gas-Phase Acidity of Polyfluorinated Hydrocarbons. Effects of Fluorine and the Perfluoroalkyl Group on Acidity. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2014. [DOI: 10.1246/bcsj.20140028] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Min Zhang
- Institute for Materials Chemistry and Engineering, Kyushu University
| | | | | | - Takaaki Sonoda
- Institute for Materials Chemistry and Engineering, Kyushu University
| | - Masaaki Mishima
- Institute for Materials Chemistry and Engineering, Kyushu University
| | - Haruhiko Fukaya
- The National Institute of Advanced Industrial Science and Technology (AIST)
| | - Taizo Ono
- The National Institute of Advanced Industrial Science and Technology (AIST)
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235
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Structure-dependent binding and activation of perfluorinated compounds on human peroxisome proliferator-activated receptor γ. Toxicol Appl Pharmacol 2014; 279:275-283. [PMID: 24998974 DOI: 10.1016/j.taap.2014.06.020] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 06/17/2014] [Accepted: 06/20/2014] [Indexed: 11/20/2022]
Abstract
Perfluorinated compounds (PFCs) have been shown to disrupt lipid metabolism and even induce cancer in rodents through activation of peroxisome proliferator-activated receptors (PPARs). Lines of evidence showed that PPARα was activated by PFCs. However, the information on the binding interactions between PPARγ and PFCs and subsequent alteration of PPARγ activity is still limited and sometimes inconsistent. In the present study, in vitro binding of 16 PFCs to human PPARγ ligand binding domain (hPPARγ-LBD) and their activity on the receptor in cells were investigated. The results showed that the binding affinity was strongly dependent on their carbon number and functional group. For the eleven perfluorinated carboxylic acids (PFCAs), the binding affinity increased with their carbon number from 4 to 11, and then decreased slightly. The binding affinity of the three perfluorinated sulfonic acids (PFSAs) was stronger than their PFCA counterparts. No binding was detected for the two fluorotelomer alcohols (FTOHs). Circular dichroim spectroscopy showed that PFC binding induced distinctive structural change of the receptor. In dual luciferase reporter assays using transiently transfected Hep G2 cells, PFCs acted as hPPARγ agonists, and their potency correlated with their binding affinity with hPPARγ-LBD. Molecular docking showed that PFCs with different chain length bind with the receptor in different geometry, which may contribute to their differences in binding affinity and transcriptional activity.
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236
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237
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Kovalenko A, Polavarapu P, Pourroy G, Waton G, Krafft MP. pH-controlled microbubble shell formation and stabilization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:6339-6347. [PMID: 24821482 DOI: 10.1021/la5007023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on microbubbles with a shell self-assembled from an anionic perfluoroalkylated surfactant, perfluorooctyl(ethyl)phosphate (F8H2Phos). Microbubbles were formed and effectively stabilized from aqueous solutions of F8H2Phos at pH 5.6-8.5. This range overlaps the domains of existence of the monosodic and disodic salts. The shell morphology of microbubbles formed spontaneously by heating aqueous solutions of F8H2Phos was monitored during cooling, directly on the microscope's stage. At pH 5.6, the shell collapses through nucleation of folds, as typical for insoluble surfactants. At pH 8.5, no folds were seen during shrinking. At higher pH, the microbubbles rapidly adsorb on the glass. The effect of pH (from 5.6 to 9.7) on adsorption kinetics of F8H2Phos at the air/water interface, and on the elasticity of its Gibbs films, was determined. At low pH, F8H2Phos is highly surface active. The interfacial film undergoes a dilute-to-condensed phase transition and a dramatic increase of elastic module, leading to extremely high values (up to 500 mN m(-1)). At high pH, the surfactant's adsorption is quasi-instantaneous, but interfacial tension lowering is limited, leading to very low elastic module (∼5 mN m(-1)). At pH 5.6 and 8.5, the interfacial tension of F8H2Phos adsorbed on millimetric bubbles and compressed at a rate similar to that exerted on micrometric bubbles during deflation is lower than the equilibrium interfacial tension. Langmuir monolayers of F8H2Phos are highly stable at low pH and feature a liquid expanded/liquid condensed transition; at high pH, they do not withstand compression. Both mono- and disodic F8H2Phos salts are needed to effectively stabilize microbubbles: the rapidly adsorbed disodic salt stabilizes a newly created air/water interface; the more surface active monosodic salt then replaces the more water-soluble disodic salt at the interface. During deflation, the surfactant shell undergoes a transition toward a highly elastic phase, which further contributes to bubble stabilization.
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Affiliation(s)
- Artem Kovalenko
- Institut Charles Sadron (ICS, UPR CNRS 22), University of Strasbourg , 23 rue du Loess, 67034 Strasbourg, France
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238
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Stefaniu C, Brezesinski G. X-ray investigation of monolayers formed at the soft air/water interface. Curr Opin Colloid Interface Sci 2014. [DOI: 10.1016/j.cocis.2014.01.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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239
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Patterned monomolecular films from polymerizable and fluorinated lipids for the presentation of glycosylated lipids. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3237-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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240
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Human biomonitoring of emerging pollutants through non-invasive matrices: state of the art and future potential. Anal Bioanal Chem 2014; 406:4063-88. [DOI: 10.1007/s00216-014-7748-1] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 02/24/2014] [Accepted: 03/04/2014] [Indexed: 12/14/2022]
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241
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Coope T, Moloy K, Yake A, Petrov V, Taylor C, Hung M, Peng S. Fluorinated sulfamido amphoteric surfactants. J Fluor Chem 2014. [DOI: 10.1016/j.jfluchem.2014.01.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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242
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Hwang J, Yu H, Malekan H, Sugiarto G, Li Y, Qu J, Nguyen V, Wu D, Chen X. Highly efficient one-pot multienzyme (OPME) synthesis of glycans with fluorous-tag assisted purification. Chem Commun (Camb) 2014; 50:3159-62. [PMID: 24473465 DOI: 10.1039/c4cc00070f] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Oligo(ethylene glycol)-linked light fluorous tags have been found to be optimal for conjugating to glycans for both high-yield enzymatic glycosylation reactions using one-pot multienzyme (OPME) systems and quick product purification using fluorous solid-phase extraction (FSPE) cartridges. The combination of OPME glycosylation systems and the FSPE cartridge purification scheme provides a highly effective strategy for facile synthesis and purification of glycans.
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Affiliation(s)
- Joel Hwang
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, USA.
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243
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244
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Maeda H. Supramolecular Chemistry of Pyrrole-Based π-Conjugated Molecules. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2013. [DOI: 10.1246/bcsj.20130219] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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245
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Quantifying cell-generated mechanical forces within living embryonic tissues. Nat Methods 2013; 11:183-9. [PMID: 24317254 PMCID: PMC3939080 DOI: 10.1038/nmeth.2761] [Citation(s) in RCA: 261] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 10/22/2013] [Indexed: 12/22/2022]
Abstract
Cell-generated mechanical forces play a critical role during tissue morphogenesis and organ formation in the embryo. However, little is known about how these forces shape embryonic organs, mainly because it has not been possible to measure cellular forces within developing three-dimensional (3D) tissues in vivo. Here we present a method to quantify cell-generated mechanical stresses that are exerted locally within living embryonic tissues using fluorescent, cell-sized, oil microdroplets with defined mechanical properties and coated with surface integrin or cadherin receptor ligands. After introducing a droplet between cells in a tissue, local stresses are determined from the droplet shape deformations, which are obtained via fluorescence microscopy and computerized image analysis. Using this method, we quantify the anisotropic stresses generated by mammary epithelial cells cultured within 3D aggregates and confirm that these stresses (3.4 nN/µm2) are dependent on myosin II activity and more than two-fold larger than the stresses generated by cells of embryonic tooth mesenchyme when analyzed within similar cultured aggregates or in developing whole mouse mandibles.
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246
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Lazzari D, Cassani MC, Solinas G, Pretto M. Fluoroalkyl allyl ethers: Useful building blocks for the synthesis of environmentally safer fluorinated multiblock molecules. J Fluor Chem 2013. [DOI: 10.1016/j.jfluchem.2013.08.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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247
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Boschet F, Ameduri B. (Co)polymers of Chlorotrifluoroethylene: Synthesis, Properties, and Applications. Chem Rev 2013; 114:927-80. [DOI: 10.1021/cr2002933] [Citation(s) in RCA: 138] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Frédéric Boschet
- Ingénierie et Architectures
Macromoléculaires, Institut Charles Gerhardt UMR (CNRS) 5253, Ecole Nationale Supérieure de Chimie de Montpellier, 8 Rue
de l’Ecole Normale, 34296 Montpellier, Cedex 5, France
| | - Bruno Ameduri
- Ingénierie et Architectures
Macromoléculaires, Institut Charles Gerhardt UMR (CNRS) 5253, Ecole Nationale Supérieure de Chimie de Montpellier, 8 Rue
de l’Ecole Normale, 34296 Montpellier, Cedex 5, France
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248
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Araghi HY, Paige MF. The effect of perfluorotetradecanoic acid on the structure of photopolymerized 10,12-pentacosadiynoic acid films at the air–water interface. CAN J CHEM 2013. [DOI: 10.1139/cjc-2013-0296] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The influence of the perfluorinated fatty acid perfluorotetradecanoic acid (CF3(CF2)12COOH; PF) on the structure of films of the photopolymerizable surfactant 10,12-pentacosadiynoic acid (PCDA) has been explored at the air–water interface through a combination of surface pressure–area compression measurements and Brewster angle microscopy imaging during the time course of UV photopolymerization. The addition of the perfluorocarbon to PCDA results in a film structure that differs significantly from the pure PCDA alone, with the most pronounced difference being the formation of photopolymer strands oriented perpendicular to the direction of film compression in a Langmuir trough. Film compression data, supported by in situ fluorescence spectrophotometry and atomic force microscope images of deposited films, suggest that compression-induced stress and accompanying film buckling, enhanced by the strong cohesion between PF and PCDA, contributes to the observed structural differences between the mixed PF–PCDA and pure PCDA photopolymerized films. This approach to forming patterned polydiacetylene films is discussed in comparison with other demonstrated methods for structuring this technologically important polymer.
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Affiliation(s)
| | - Matthew F. Paige
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada
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249
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Buccal absorption of propofol when dosed in 1-perfluorobutylpentane to anaesthetised and conscious Wistar rats and Göttingen mini-pigs. Eur J Pharm Biopharm 2013; 85:1310-6. [DOI: 10.1016/j.ejpb.2013.06.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Revised: 03/14/2013] [Accepted: 06/10/2013] [Indexed: 02/07/2023]
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250
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Zhang L, Ren XM, Guo LH. Structure-based investigation on the interaction of perfluorinated compounds with human liver fatty acid binding protein. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:11293-301. [PMID: 24006842 DOI: 10.1021/es4026722] [Citation(s) in RCA: 167] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Perfluorinated compounds (PFCs) are known to accumulate in liver and induce hepatotoxicity on experimental animals. Liver fatty acid binding protein (L-FABP) is expressed highly in hepatocytes and binds fatty acids. PFCs may bind with FABP and change their ADME and toxicity profile. In the present study, the binding interaction of 17 structurally diverse PFCs with human L-FABP was investigated to assess their potential disruption effect on fatty acid binding. The binding affinity of twelve perfluorinated carboxylic acids (PFCAs), as determined by fluorescence displacement assay, increased significantly with their carbon number from 4 to 11, and decreased slightly when the number was over 11. The three perfluorinated sulfonic acids (PFSAs) displayed comparable affinity, but no binding was detected for the two fluorotelomer alcohols. Circular dichroism results showed that PFC binding induced distinctive structural changes of the protein. Molecular docking revealed that the driving forces for the binding of PFCs with FABP were predominantly hydrophobic and hydrogen-bonding interactions, and the binding geometry was dependent on both the size and rigidity of the PFCs. Based on the binding constant obtained in this work, the possibility of in vivo competitive displacement of fatty acids from FABP by PFCs was estimated.
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Affiliation(s)
- Lianying Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences , P.O. Box 2871, 18 Shuangqing Road, Beijing 100085, China
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