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Ba-Salem AO, Duhamel J. Synthesis and Characterization of a Pyrene-Labeled Gemini Surfactant Sensitive to the Polarity of Its Environment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:13824-13837. [PMID: 34791874 DOI: 10.1021/acs.langmuir.1c01759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The cationic gemini surfactant PyO-3-12 was designed to include two dimethyl ammonium groups, one dodecyl tail, and 1-pyrenemethyl hexyl ether tail into the structure of the surfactant. The pyrenyl label ensured that the fluorescence of pyrene could be employed to probe the behavior of PyO-3-12 at the molecular level. The introduction of the oxygen atom in the β-position to pyrene was found to be critical for restoring the sensitivity of the pyrenyl label to the polarity of its environment. The properties of PyO-3-12 were characterized in water by surface tension and a fluorescence methodology that involved the global model-free analysis (MFA) of the pyrene monomer and excimer fluorescence decays to provide quantitative information about the state (unassociated-vs-aggregated) of PyO-3-12. The MFA was combined with a fluorescence quenching study with 2,6-dinitrotoluene to determine the size of the PyO-3-12 micelles. PyO-3-12 was found to behave like a typical gemini surfactant, exhibiting a critical micelle concentration (CMC) of 0.38 (±0.05) mM and an aggregation number (Nagg) equal to 23 (±2). Besides allowing PyO-3-12 to probe the polarity of its environment, the oxygen atom in the β-position next to pyrene brought some pyrenyl labels closer to the interface between the micellar interior and the aqueous phase, in a process that increased the effective volume of the hydrophobic part of PyO-3-12. This led to an increase in the packing parameter of PyO-3-12 and, consequently, an increase in Nagg compared to the Nagg value of 14 (±0.2) obtained for Py-3-12, a gemini surfactant, whose chemical structure was similar to that of PyO-3-12 but without the oxygen in the β-position to pyrene. The methodology described in this study to prepare and characterize pyrene-labeled surfactants is general and can be applied to study any pyrene-labeled surfactant and its interactions with oppositely charged macromolecules.
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Affiliation(s)
- Abdullah O Ba-Salem
- Institute for Polymer Research, Waterloo Institute for Nanotechnology, Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - Jean Duhamel
- Institute for Polymer Research, Waterloo Institute for Nanotechnology, Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
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Ba-Salem AO, Duhamel J. Determination of the Aggregation Number of Pyrene-Labeled Gemini Surfactant Micelles by Pyrene Fluorescence Quenching Measurements. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:6069-6079. [PMID: 33960794 DOI: 10.1021/acs.langmuir.1c00847] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A cationic gemini surfactant referred to as Py-3-12 and composed of two alkylated diammonium bromide head groups, a propyl spacer, and dodecyl and 1-pyrenehexyl hydrophobic tails was synthesized. Its critical micellar concentration (CMC) was determined to equal 0.15 (±0.02) mM by surface tension and time-resolved fluorescence measurements. The state of the pyrene molecules, whether they were incorporated inside the Py-3-12 micelles or unassociated in the aqueous solution, was determined by applying the global model-free analysis (MFA) to the fluorescence decays acquired with Py-3-12 aqueous solutions. The unassociated Py-3-12 surfactants emitted as pyrene monomers and showed a long fluorescence lifetime. The excited pyrenyl groups located inside Py-3-12 micelles formed an excimer by a rapid encounter with a ground-state pyrene with an average rate constant equal to 0.69 (±0.06) ns-1. After having the photophysical properties of Py-3-12 in aqueous solution characterized, the number (Nagg) of surfactants per micelle was determined by conducting quenching experiments with dinitrotoluene (DNT). Although DNT is fairly hydrophobic, it was found to partition itself between the Py-3-12 micelles and the aqueous phase. Fluorescence quenching experiments performed on the pyrene monomer and excimer generated by the Py-3-12 aqueous solutions yielded the concentration ([Q]b) of DNT bound to the Py-3-12 micelles and the average number ⟨n⟩d of DNT quenching an excimer by diffusive encounters. A combination of steady-state and time-resolved fluorescence quenching experiments on the excimer yielded the number (⟨n⟩s) of DNT molecules that were bound to the micelles and quenched the excimer in a static manner. A plot of the sum ⟨n⟩d + ⟨n⟩s as a function of [Q]b yielded an Nagg value of 14.0 (±0.2) Py-3-12 units per micelle. This study represents the first example in the literature where Nagg is determined for a micelle, where each surfactant molecule is labeled with pyrene.
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Affiliation(s)
- Abdullah O Ba-Salem
- Department of Chemistry, Institute for Polymer Research, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - Jean Duhamel
- Department of Chemistry, Institute for Polymer Research, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
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Jia Y, Guo X, Jia L, Zhao Z, Yang R, Zhang Y, Sun H. Novel asymmetrical bis-surfactants with naphthalene and two amide groups: Synthesis, foamability and foam stability. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115534] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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4
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Surface properties and microemulsion of anionic/nonionic mixtures based on sulfonate Gemini surfactant in the presence of NaCl. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113907] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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5
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Nehru S, Veeralakshmi S, Kalaiselvam S, Subin David SP, Sandhya J, Arunachalam S. DNA binding, antibacterial, hemolytic and anticancer studies of some fluorescent emissive surfactant-ruthenium(II) complexes. J Biomol Struct Dyn 2020; 39:2242-2256. [PMID: 32216611 DOI: 10.1080/07391102.2020.1747547] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Designing the effective metallodrugs with amphiphilic nature is an active approach for the biomedical applications such as chemotheraphy, bioimaging, drug carrier, etc. To elaborate this, some fluorescent emissive surfactant-ruthenium(II) complexes and its precursor ruthenium(II) complexes have been interacted with calf thymus DNA (CT-DNA) for understanding the biophysical impacts of head and tail parts of the metallosurfactants. Here, DNA binding studies were examined by UV-visible absorption, fluorescence, circular dichroism and viscosity measurements. The obtained results showed that surfactant-ruthenium(II) complexes effectively bind with CT-DNA through hydrophobic interactions dominated moderate intercalation, whereas precursor ruthenium(II) complexes interact CT-DNA through electrostatic interactions dominated moderate intercalation. Also, increase of hydrophobic alkyl amine chain length as well as size of the head group in surfactant-ruthenium(II) complexes increased the binding affinity with CT-DNA, in which tail group played a dominant role. Further investigations of antibacterial, hemolytic and anticancer activities showed that desired biological activities could be obtained by tuning the head and tail groups of the metallodrugs in near future.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Selvan Nehru
- Department of Physical Chemistry, University of Madras, Chennai, Tamil Nadu, India.,School of Chemistry, Bharathidasan University, Tiruchirappalli, Tamil Nadu, India
| | - Selvakumar Veeralakshmi
- Department of Applied Science and Technology, A.C. Tech. Campus, Anna University, Chennai, Tamil Nadu, India
| | - Siva Kalaiselvam
- Department of Applied Science and Technology, A.C. Tech. Campus, Anna University, Chennai, Tamil Nadu, India
| | - S P Subin David
- Department of Applied Science and Technology, A.C. Tech. Campus, Anna University, Chennai, Tamil Nadu, India
| | - Jayakumar Sandhya
- Department of Applied Science and Technology, A.C. Tech. Campus, Anna University, Chennai, Tamil Nadu, India
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Bitter S, Kunkel M, Burkart L, Mang A, Winter RF, Polarz S. Organometallic, Nonclassical Surfactant with Gemini Design Comprising π-Conjugated Constituents Ready for Modification. ACS OMEGA 2018; 3:8854-8864. [PMID: 30197995 PMCID: PMC6120738 DOI: 10.1021/acsomega.8b01405] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 07/30/2018] [Indexed: 06/08/2023]
Abstract
Surfactants are functional molecules comprising a water-compatible head group and a hydrophobic tail. One of their features is the formation of self-assembled structures in contact with water, for instance, micelles, vesicles, or lyotropic liquid crystals. One way to increase the functionality of surfactants is to implement moieties containing transition-metal species. Ferrocene-based surfactants represent an excellent example because of the distinguished redox features. In most existing ferrocene-based amphiphiles, an alkyl chain is classically used as the hydrophobic tail. We report the synthesis and properties of 1-triisopropylsilylethynyl-1'-trimethylammoniummethylferrocene (FcNMe3TIPS). In FcNMe3TIPS, ferrocene is part of the head group (Gemini design) but is also attached to a (protected) π-conjugated ethynyl group. Although this architecture differs from that of classical amphiphiles and those of other ferrocene-based amphiphiles, the compound shows marked surfactant properties comparable to those of lipids, exhibiting a very low value of critical aggregation concentration in water (cac = 0.03 mM). It forms classical micelles only in a very narrow concentration range, which then convert into monolayer vesicles. Unlike classical surfactants, aggregates already form at a very low concentration, far beneath that required for the formation of a monolayer at the air-water interface. At even higher concentration, FcNMe3TIPS forms lyotropic liquid crystals, not only in contact with water, but also in a variety of organic solvents. As an additional intriguing feature, FcNMe3TIPS is amenable to a range of further modification reactions. The TIPS group is easily cleaved, and the resulting ethynyl function can be used to construct heterobimetallic platinum-ferrocene conjugates with trans-Pt(PEt3)2X (X = Cl, I) complex entities, leading to a heterobimetallic surfactant. We also found that the benzylic α-position of FcNMe3TIPS is rather reactive and that the attached ammonium group can be exchanged by other substituents (e.g., -CN), which offers additional opportunities for further functionalization. Although FcNMe3TIPS is reversibly oxidized in voltammetric and UV-vis spectroelectrochemical experiments, the high reactivity at the α-position is also responsible for the instability of the corresponding ferrocenium ion, leading to a polymerization reaction.
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8
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Li K, Kardelis V, Adronov A. “Click” generation of a conjugated polymer library for SWNT dispersion. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/pola.29093] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Kelvin Li
- Department of Chemistry; McMaster University; Hamilton Ontario Canada
| | - Vladimir Kardelis
- Department of Chemistry; McMaster University; Hamilton Ontario Canada
| | - Alex Adronov
- Department of Chemistry; McMaster University; Hamilton Ontario Canada
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Peng J, Deng J, Huang X, Sun P, Deng W. Aggregation-Enhanced Emission of Fluorescent-Gemini Surfactants with High Photostability for Cell-Membrane Imaging. J SURFACTANTS DETERG 2018. [DOI: 10.1002/jsde.12036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jinwen Peng
- Guangxi Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials; Guilin University of Technology; Guilin 541004 China
| | - Junjie Deng
- Guangxi Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials; Guilin University of Technology; Guilin 541004 China
| | - Xuebing Huang
- Guangxi Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials; Guilin University of Technology; Guilin 541004 China
| | - Pengfei Sun
- Key Laboratory for Organic Electronics & Information Displays, Institute of Advanced Materials; Nanjing University of Posts & Telecommunications; Nanjing 210046 China
| | - Weixing Deng
- Guangxi Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials; Guilin University of Technology; Guilin 541004 China
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10
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Yakimova LS, Puplampu JB, Evtugin GA, Stoikov II. Polyfunctional branched nitrogen-containing p-tert-butylthiacalix[4]arene derivatives as efficient agents for packaging calf thymus DNA. Russ Chem Bull 2017. [DOI: 10.1007/s11172-017-1917-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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11
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Muslim AA, Ayyash D, Gujral SS, Mekhail GM, Rao PPN, Wettig SD. Synthesis and characterization of asymmetrical gemini surfactants. Phys Chem Chem Phys 2017; 19:1953-1962. [DOI: 10.1039/c6cp07688b] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of variation in the length of surfactant hydrocarbon tail groups was tested in a series of dissymmetric gemini surfactants.
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Affiliation(s)
- Aula Al Muslim
- School of Pharmacy
- University of Waterloo
- Waterloo
- Canada
- Waterloo Institute for Nanotechnology
| | - Dana Ayyash
- School of Pharmacy
- University of Waterloo
- Waterloo
- Canada
| | | | - George M. Mekhail
- School of Pharmacy
- University of Waterloo
- Waterloo
- Canada
- Department of Pharmaceutics and Industrial Pharmacy
| | | | - Shawn D. Wettig
- School of Pharmacy
- University of Waterloo
- Waterloo
- Canada
- Waterloo Institute for Nanotechnology
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12
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Petaccia M, Giansanti L, Leonelli F, Bella AL, Gradella Villalva D, Mancini G. Synthesis, characterization and inclusion into liposomes of a new cationic pyrenyl amphiphile. Chem Phys Lipids 2016; 200:83-93. [DOI: 10.1016/j.chemphyslip.2016.08.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 07/26/2016] [Accepted: 08/08/2016] [Indexed: 01/08/2023]
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13
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Pietralik Z, Skrzypczak A, Kozak M. Dicationic Surfactants with Glycine Counter Ions for Oligonucleotide Transportation. Chemphyschem 2016; 17:2424-33. [PMID: 27214208 DOI: 10.1002/cphc.201600175] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Indexed: 11/10/2022]
Abstract
Gemini surfactants are good candidates to bind, protect, and deliver nucleic acids. Herein, the concept of amino acids (namely glycine) as counter ions of gemini surfactants for gene therapy application was explored. This study was conducted on DNA and RNA oligomers and two quaternary bis-imidazolium salts, having 2,5-dioxahexane and 2,8-dioxanonane spacer groups. The toxicity level of surfactants was assessed by an MTT assay, and their ability to bind nucleic acids was tested through electrophoresis. The nucleic acid conformation was established based on circular dichroism and infrared spectroscopic analyses. The structures of the formed complexes were characterized by small-angle scattering of synchrotron radiation. Both studied surfactants appear to be suitable for gene therapy; however, although they vary by only three methylene groups in the spacer, they differ in binding ability and toxicity. The tested oligonucleotides maintained their native conformations upon surfactant addition and the studied lipoplexes formed a variety of structures. In systems based on a 2,5-dioxahexane spacer, a hexagonal phase was observed for DNA-surfactant complexes and a micellar phase was dominant with RNA. For the surfactant with a 2,8-dioxanonane spacer group, the primitive cubic phase prevailed.
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Affiliation(s)
- Zuzanna Pietralik
- Department of Macromolecular Physics, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614, Poznan, Poland.
| | - Andrzej Skrzypczak
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Berdychowo 4, 60-965, Poznan, Poland
| | - Maciej Kozak
- Department of Macromolecular Physics, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614, Poznan, Poland. .,Joint Laboratory for SAXS Studies, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614, Poznan, Poland.
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Hydrophilic interaction liquid chromatography-tandem mass spectrometry quantitative method for the cellular analysis of varying structures of gemini surfactants designed as nanomaterial drug carriers. J Chromatogr A 2016; 1446:114-24. [PMID: 27086283 DOI: 10.1016/j.chroma.2016.04.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 03/31/2016] [Accepted: 04/04/2016] [Indexed: 11/21/2022]
Abstract
Diquaternary gemini surfactants have successfully been used to form lipid-based nanoparticles that are able to compact, protect, and deliver genetic materials into cells. However, what happens to the gemini surfactants after they have released their therapeutic cargo is unknown. Such knowledge is critical to assess the quality, safety, and efficacy of gemini surfactant nanoparticles. We have developed a simple and rapid liquid chromatography electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) method for the quantitative determination of various structures of gemini surfactants in cells. Hydrophilic interaction liquid chromatography (HILIC) was employed allowing for a short simple isocratic run of only 4min. The lower limit of detection (LLOD) was 3ng/mL. The method was valid to 18 structures of gemini surfactants belonging to two different structural families. A full method validation was performed for two lead compounds according to USFDA guidelines. The HILIC-MS/MS method was compatible with the physicochemical properties of gemini surfactants that bear a permanent positive charge with both hydrophilic and hydrophobic elements within their molecular structure. In addition, an effective liquid-liquid extraction method (98% recovery) was employed surpassing previously used extraction methods. The analysis of nanoparticle-treated cells showed an initial rise in the analyte intracellular concentration followed by a maximum and a somewhat more gradual decrease of the intracellular concentration. The observed intracellular depletion of the gemini surfactants may be attributable to their bio-transformation into metabolites and exocytosis from the host cells. Obtained cellular data showed a pattern that grants additional investigations, evaluating metabolite formation and assessing the subcellular distribution of tested compounds.
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Ahmed T, Kamel AO, Wettig SD. Interactions between DNA and gemini surfactant: impact on gene therapy: part II. Nanomedicine (Lond) 2016; 11:403-20. [PMID: 26784450 DOI: 10.2217/nnm.15.204] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Nonviral gene delivery, provides distinct treatment modalities for the inherited and acquired diseases, relies upon the encapsulation of a gene of interest, which is then ideally delivered to the target cells. Variations in the chemical structure of gemini surfactants and subsequent physicochemical characteristics of the gemini-based lipoplexes and their impact on efficient gene transfection were assessed in part I, which was published in first March 2016 issue of Nanomedicine (1103). In order to design an efficient vector using gemini surfactants, the interaction of the surfactant with DNA and other components of the delivery system must be characterized, and more critically, well understood. Such studies will help to understand how nonviral transfection complexes, in general, overcome various cellular barriers. The Langmuir-Blodgett monolayer studies, atomic force microscopy, differential scanning calorimetry, isothermal titration calorimetry, small-angle x-ray scattering, are extensively used to evaluate the interaction behavior of gemini surfactants with DNA and other vector components. Part II of this review focuses on the use of these unique techniques to understand their interaction with DNA.
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Affiliation(s)
- Taksim Ahmed
- School of Pharmacy, University of Waterloo, 200 University Ave. W., Waterloo, ON, N2L 3G1, Canada.,Leslie Dan Faculty of Pharmacy, University of Toronto, 144 College Street, Toronto, ON, M5S 3M2, Canada
| | - Amany O Kamel
- School of Pharmacy, University of Waterloo, 200 University Ave. W., Waterloo, ON, N2L 3G1, Canada.,Department of Pharmaceutics & Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Khalifa El-Maamon Street, Abbasiya Square, Cairo 11566, Egypt
| | - Shawn D Wettig
- School of Pharmacy, University of Waterloo, 200 University Ave. W., Waterloo, ON, N2L 3G1, Canada.,Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Ave. W., Waterloo, ON, N2L 3G1, Canada
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16
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Dong C, Badea I, Poorghorban M, Verrall R, Foldvari M. Impact of phospholipids on plasmid packaging and toxicity of gemini nanoparticles. J Mater Chem B 2015; 3:8806-8822. [PMID: 26693021 DOI: 10.1039/c5tb01400j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Understanding the relationship of structural modifications on the assembly and disassembly of synthetic or non-viral gene delivery is crucial with regard to their rational development. This study describes the use of fluorescence correlation spectroscopy (FCS), as a new tool, to investigate the effect of systematic chemical modifications to dicationic N,N-bis(dimethylalkyl)-α,ω-alkanediammonium surfactants (gemini surfactants) on the self-assembly and physical properties of a series of gemini nanoparticles (gemini NPs). A systematic screening of 27 gemini-plasmid (GP) complexes and gemini NPs showed that their final morphology is governed by the pre-compaction of plasmid by the gemini surfactants. The assembly process of gemini-plasmid intermediate complex (GP) and the final gemini NP (or gemini-plasmid-lipid complex, GPL) was monitored by the tracking of the Cy5-labeled plasmid. Based on diffusion properties, GP complexes were larger than gemini NPs (300-500 nm for GP and 200-300 nm for GPLs). Stoichiometric analysis of the raw intensity histograms showed that both GPs and GPLs particles were composed of multiple plasmids. The final GPLs contain fewer plasmids (2-20 per particle) compared to the intermediate GP (5-35 per particle). The addition of phospholipids dispersed and stabilized GPs to form GPL, but the type of phospholipid (DOPE or DD 1:3) had little effect on the final size of the particles. The FCS data were both validated and complemented by the results of studies of dynamic light scattering (DLS), atomic force microscopy (AFM), X-ray scattering and dye-exclusion assays. A model for gemini NP assembly involving supramolecular aggregate intermediates is proposed.
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Affiliation(s)
- Chilbert Dong
- School of Pharmacy and Waterloo Institute of Nanotechnology, University of Waterloo, Waterloo, ON, Canada N2L 3G1
| | - Ildiko Badea
- College of Pharmacy and Nutrition University of Saskatchewan, Saskatoon, SK. Canada S7N 2Z4
| | - Masoomeh Poorghorban
- College of Pharmacy and Nutrition University of Saskatchewan, Saskatoon, SK. Canada S7N 2Z4
| | - Ronald Verrall
- Department of Chemistry, University of Saskatchewan, Saskatoon, SK. Canada S7N 5C9
| | - Marianna Foldvari
- School of Pharmacy and Waterloo Institute of Nanotechnology, University of Waterloo, Waterloo, ON, Canada N2L 3G1 ; The Centre for Bioengineering & Biotechnology University of Waterloo, Waterloo, ON, Canada N2L 3G1
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Ostos F, Lebron J, Moyá M, Deasy M, López-Cornejo P. Binding of DNA by a dinitro-diester calix[4]arene: Denaturation and condensation of DNA. Colloids Surf B Biointerfaces 2015; 127:65-72. [DOI: 10.1016/j.colsurfb.2015.01.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 12/12/2014] [Accepted: 01/12/2015] [Indexed: 12/27/2022]
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18
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Ferreira MF, Pereira G, André JP, Prata MIM, Ferreira PMT, Martins JA, Geraldes CFGC. Ga[NO2A-N-(α-amino)propionate] chelates: synthesis and evaluation as potential tracers for 68Ga PET. Dalton Trans 2014; 43:8037-47. [DOI: 10.1039/c4dt00386a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A reversible pH-trigged N3O3⇆N4O2 coordination isomerism was demonstrated for the Ga[NO2A-N-(α-amino)propionate] chelate in the pH range 4–6.
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Affiliation(s)
| | - Goretti Pereira
- Centro de Química (CQ-UM)
- Universidade do Minho
- 4710-057 Braga, Portugal
| | - João P. André
- Centro de Química (CQ-UM)
- Universidade do Minho
- 4710-057 Braga, Portugal
| | - M. I. M. Prata
- ICNAS and IBILI
- Faculty of Medicine
- University of Coimbra
- 3000-548 Coimbra, Portugal
| | | | - José A. Martins
- Centro de Química (CQ-UM)
- Universidade do Minho
- 4710-057 Braga, Portugal
| | - Carlos F. G. C. Geraldes
- Department of Life Sciences
- Faculty of Science and Technology
- University of Coimbra
- 3001-401 Coimbra, Portugal
- Chemistry Centre
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Ferreira MF, Pereira G, Martins AF, Martins CIO, Prata MIM, Petoud S, Toth E, Ferreira PMT, Martins JA, Geraldes CFGC. Ln[DO3A-N-α-(pyrenebutanamido)propionate] complexes: optimized relaxivity and NIR optical properties. Dalton Trans 2014; 43:3162-73. [DOI: 10.1039/c3dt52958d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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20
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Nakahara H, Hasegawa A, Uehara S, Akisada H, Shibata O. Solution properties of gemini surfactant of decanediyl-1-10-bis (dimethyltetradecylammonium bromide) in aqueous medium. J Oleo Sci 2013; 62:905-12. [PMID: 24200938 DOI: 10.5650/jos.62.905] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The solution properties of a typical gemini surfactant of decanediyl-1-10-bis (dimethyltetradecylammonium bromide) (abbrev. 14-10-14,2Br(-)) were examined in an aqueous medium at temperatures of 288.2, 298.2, and 308.2 K. The characterization was performed by employing surface tension measurements, electrical conductivity measurements, steady-state fluorescence quenching (SSFQ), and dynamic light scattering (DLS). The surface tension was measured with the drop volume method, in which an improved tensiometer was used and the experimental operation was modified. The resultant data were well reproducible and the equilibrium adsorption time after producing the droplet onto the tip of the capillary was on the order of minutes. In addition, the critical micelle concentration obtained from the surface tension data is in good agreement with that obtained from the conductivity data. Using the conductivity variation as a function of surfactant concentration, the thermodynamic parameters of micellization were calculated. Furthermore, the SSFQ method suggests a small and constant aggregation number, irrespective of temperature. The formation of small-size micelles was also confirmed by DLS measurements.
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Affiliation(s)
- Hiromichi Nakahara
- Department of Biophysical Chemistry, Faculty of Pharmaceutical Sciences, Nagasaki International University
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Buse J, Badea I, Verrall RE, El-Aneed A. A general liquid chromatography tandem mass spectrometry method for the quantitative determination of diquaternary ammonium gemini surfactant drug delivery agents in mouse keratinocytes’ cellular lysate. J Chromatogr A 2013; 1294:98-105. [DOI: 10.1016/j.chroma.2013.04.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 04/11/2013] [Accepted: 04/12/2013] [Indexed: 11/28/2022]
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22
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A novel surfactant-like fluorophore and its probing ability to the aggregation of amphiphilic compounds. J Photochem Photobiol A Chem 2012. [DOI: 10.1016/j.jphotochem.2012.07.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Kapoor M, Burgess DJ. Physicochemical characterization of anionic lipid-based ternary siRNA complexes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2012; 1818:1603-12. [DOI: 10.1016/j.bbamem.2012.03.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 03/13/2012] [Accepted: 03/14/2012] [Indexed: 01/30/2023]
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24
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Duhamel J. New insights in the study of pyrene excimer fluorescence to characterize macromolecules and their supramolecular assemblies in solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:6527-6538. [PMID: 22423596 DOI: 10.1021/la2047646] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This report highlights some of the recent developments that have been made in the quantitative analysis of fluorescence decays acquired with pyrene-labeled macromolecules. With these new analytical tools, macromolecules of different composition and architecture can now be labeled in a variety of ways with the pyrene chromophore, and the kinetics of pyrene excimer formation can be described to retrieve quantitative information about the internal dynamics of the macromolecules studied. In particular, this review presents the procedure that was followed to develop these new analytical tools and how the process of pyrene excimer formation with vinyl polymers, poly(L-glutamic acid), dendrimers, associative polymers, surfactants, and lipids labeled with pyrene has been successfully characterized thanks to these analysis programs.
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Affiliation(s)
- Jean Duhamel
- Institute of Polymer Research, Waterloo Institute for Nanotechnology, Department of Chemistry, University of Waterloo , Waterloo ON N2L 3G1, Canada
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25
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Pullmannová P, Bastos M, Bai G, Funari SS, Lacko I, Devínsky F, Teixeira J, Uhríková D. The ionic strength effect on the DNA complexation by DOPC — gemini surfactants liposomes. Biophys Chem 2012; 160:35-45. [DOI: 10.1016/j.bpc.2011.09.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Revised: 09/01/2011] [Accepted: 09/04/2011] [Indexed: 11/25/2022]
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26
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Keyes C, Duhamel J, Wettig S. Characterization of the behavior of a pyrene substituted gemini surfactant in water by fluorescence. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:3361-3371. [PMID: 21341800 DOI: 10.1021/la104820w] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Time-resolved fluorescence was applied to characterize the behavior in solution of a gemini surfactant substituted with pyrene (Py-3-12). Upon association in water, excimer formation by Py-3-12 can be probed by acquiring pyrene monomer and excimer fluorescence decays which can be fitted globally according to the model free (MF) analysis to yield quantitative information about the internal dynamics of the Py-3-12 surfactant micelles as well as a complete description of the distribution of the different pyrene species in solution either incorporated inside the micelles or free in solution. A proof of procedure for the MF analysis was established by noting that the concentrations of free surfactant in solution, [Py-3-12](free), was found to equal the critical micelle concentration (CMC) for surfactant concentrations larger than the CMC. (I(E)/I(M))(SPC), the ratio of pyrene monomer to excimer fluorescence intensities, was calculated from parameters retrieved from the MF analysis of the fluorescence decays and was found to be independent of sample geometry. This work demonstrates how time-resolved fluorescence can be used to study the properties of pyrene-labeled macromolecules under conditions where large absorptions and inner filter effects usually distort the steady-state fluorescence signals. It was found that the pyrene excimer is formed mostly by diffusion within the Py-3-12 micelles, which suggests that the pyrene microenvironment is fluid, an important feature for future studies on the interactions of Py-3-12 with DNA.
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Affiliation(s)
- Christine Keyes
- Institute for Polymer Research, Department of Chemistry, University of Waterloo, Waterloo, ON N2L 3G1, Canada
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Han Y, Wang Y. Aggregation behavior of gemini surfactants and their interaction with macromolecules in aqueous solution. Phys Chem Chem Phys 2011; 13:1939-56. [PMID: 21225063 DOI: 10.1039/c0cp01196g] [Citation(s) in RCA: 181] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gemini surfactants are constructed by two hydrophobic chains and two polar/ionic head groups covalently connected by a spacer group at the level of the head groups. Gemini surfactants possess unique structural variations and display special aggregate transitions. Their aggregation ability and aggregate structures can be more effectively adjusted through changing their molecular structures compared with the corresponding monomeric surfactants. Moreover, gemini surfactants exhibit special and useful properties while interacting with polymers and biomacromolecules. Their strong self-aggregation ability can be applied to effectively influence the aggregation behavior of both polymers and biomacromolecules. This short review is focused on the performances of gemini surfactants in aqueous solutions investigated in the last few years, and summarizes the effects of molecular structures on aggregation behavior of gemini surfactants in aqueous solution as well as the interaction of gemini surfactants with polymers and biomacromolecules respectively.
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Affiliation(s)
- Yuchun Han
- Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
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Salonen A, Knyazev A, von Bandel N, Degrouard J, Langevin D, Drenckhan W. A Novel Pyrene-Based Fluorescing Amphiphile with Unusual Bulk and Interfacial Properties. Chemphyschem 2011; 12:150-60. [DOI: 10.1002/cphc.201000627] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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29
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Wang H, Wettig SD. Synthesis and aggregation properties of dissymmetric phytanyl-gemini surfactants for use as improved DNA transfection vectors. Phys Chem Chem Phys 2011; 13:637-42. [DOI: 10.1039/c0cp00146e] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Wettig SD, Deubry R, Akbar J, Kaur T, Wang H, Sheinin T, Joseph JW, Slavcev RA. Thermodynamic investigation of the binding of dissymmetric pyrenyl-gemini surfactants to DNA. Phys Chem Chem Phys 2010; 12:4821-6. [DOI: 10.1039/b923817d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Bhattacharya S, Bajaj A. Advances in gene delivery through molecular design of cationic lipids. Chem Commun (Camb) 2009:4632-56. [DOI: 10.1039/b900666b] [Citation(s) in RCA: 232] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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32
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Bjelić S, Jelesarov I. A survey of the year 2007 literature on applications of isothermal titration calorimetry. J Mol Recognit 2008; 21:289-312. [PMID: 18729242 DOI: 10.1002/jmr.909] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Elucidation of the energetic principles of binding affinity and specificity is a central task in many branches of current sciences: biology, medicine, pharmacology, chemistry, material sciences, etc. In biomedical research, integral approaches combining structural information with in-solution biophysical data have proved to be a powerful way toward understanding the physical basis of vital cellular phenomena. Isothermal titration calorimetry (ITC) is a valuable experimental tool facilitating quantification of the thermodynamic parameters that characterize recognition processes involving biomacromolecules. The method provides access to all relevant thermodynamic information by performing a few experiments. In particular, ITC experiments allow to by-pass tedious and (rarely precise) procedures aimed at determining the changes in enthalpy and entropy upon binding by van't Hoff analysis. Notwithstanding limitations, ITC has now the reputation of being the "gold standard" and ITC data are widely used to validate theoretical predictions of thermodynamic parameters, as well as to benchmark the results of novel binding assays. In this paper, we discuss several publications from 2007 reporting ITC results. The focus is on applications in biologically oriented fields. We do not intend a comprehensive coverage of all newly accumulated information. Rather, we emphasize work which has captured our attention with originality and far-reaching analysis, or else has provided ideas for expanding the potential of the method.
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Affiliation(s)
- Sasa Bjelić
- Biochemisches Institut der Universität Zürich, Winterthurerstrasse 190, Zürich, Switzerland
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Bouchemal K. New challenges for pharmaceutical formulations and drug delivery systems characterization using isothermal titration calorimetry. Drug Discov Today 2008; 13:960-72. [PMID: 18617012 DOI: 10.1016/j.drudis.2008.06.004] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2008] [Revised: 02/29/2008] [Accepted: 06/04/2008] [Indexed: 11/25/2022]
Abstract
Long viewed as the 'method of choice' for characterizing thermodynamics and stoichiometry of molecular interactions, with high sensitivity, isothermal titration calorimetry (ITC) has been applied to many areas of pharmaceutical analysis. This review highlights ITC employment to measure binding thermodynamics and their use for pharmaceutical formulations and drug delivery system characterization particularly cyclodextrin-guest interactions, investigation of micellar-based systems, polyelectrolytes, nucleic acid interactions with multivalent cations and the optimization of DNA targeting and delivery. Furthermore, the potential of ITC for the characterization of different functionalities carried by nanoparticles as well as their interaction with living systems was outlined.
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Affiliation(s)
- Kawthar Bouchemal
- Université Paris-Sud 11, School of Pharmacy, UMR CNRS 8612, 5 Rue J.B. Clément, 92296 Châtenay Malabry, France.
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34
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Aggregation properties of cationic gemini surfactants with dihydroxyethylamino headgroups in aqueous solution. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2008.04.028] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bajaj A, Paul B, Kondaiah P, Bhattacharya S. Structure−Activity Investigation on the Gene Transfection Properties of Cardiolipin Mimicking Gemini Lipid Analogues. Bioconjug Chem 2008; 19:1283-300. [DOI: 10.1021/bc700474r] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Avinash Bajaj
- Department of Organic Chemistry and Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore 560 012, India, and Chemical Biology Unit of JNCASR, Bangalore 560 064, India
| | - Bishwajit Paul
- Department of Organic Chemistry and Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore 560 012, India, and Chemical Biology Unit of JNCASR, Bangalore 560 064, India
| | - Paturu Kondaiah
- Department of Organic Chemistry and Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore 560 012, India, and Chemical Biology Unit of JNCASR, Bangalore 560 064, India
| | - Santanu Bhattacharya
- Department of Organic Chemistry and Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore 560 012, India, and Chemical Biology Unit of JNCASR, Bangalore 560 064, India
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Mullice LA, Laye RH, Harding LP, Buurma NJ, Pope SJA. Rhenium complexes of chromophore-appended dipicolylamine ligands: syntheses, spectroscopic properties, DNA binding and X-ray crystal structure. NEW J CHEM 2008. [DOI: 10.1039/b800999f] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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