1
|
Kryuchkova A, Savin A, Kiseleva A, Dukhinova M, Krivoshapkina E, Krivoshapkin P. Magnetothermal spider silk-based scaffolds for cartilage regeneration. Int J Biol Macromol 2023; 253:127246. [PMID: 37797862 DOI: 10.1016/j.ijbiomac.2023.127246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/02/2023] [Accepted: 10/02/2023] [Indexed: 10/07/2023]
Abstract
Developing biocompatible, magnetically controlled polymers is a multifunctional solution to many surgical complications. By combining nanoparticle technology with the latest advancements in polymer materials science, we created a multicomponent hybrid system comprised of a robust native spider silk-based matrix; a Mn0.9Zn0.1Fe2O4 nanoparticles coating to provide a controlled thermal trigger for drug release; and liposomes, which act as drug carriers. Fluorescent microscope images show that the dye loaded into the liposomes is released when the system is exposed to an alternating magnetic field due to heating of ferromagnetic nanoparticles, which had a low Curie temperature (40-46°С). The silk matrix also demonstrated outstanding biocompatibility, creating a favorable environment for human postnatal fibroblast cell adhesion, and paving the way for their directed growth. This paper describes a complex approach to cartilage regeneration by developing a spider silk-based scaffold with anatomical mechanical properties for controlled drug delivery in a multifunctional autologous matrix-induced chondrogenesis.
Collapse
Affiliation(s)
- Anastasia Kryuchkova
- ITMO University, 9 Lomonosova Street, Saint Petersburg 191002, Russian Federation
| | - Artemii Savin
- ITMO University, 9 Lomonosova Street, Saint Petersburg 191002, Russian Federation
| | - Aleksandra Kiseleva
- ITMO University, 9 Lomonosova Street, Saint Petersburg 191002, Russian Federation
| | - Marina Dukhinova
- ITMO University, 9 Lomonosova Street, Saint Petersburg 191002, Russian Federation
| | - Elena Krivoshapkina
- ITMO University, 9 Lomonosova Street, Saint Petersburg 191002, Russian Federation
| | - Pavel Krivoshapkin
- ITMO University, 9 Lomonosova Street, Saint Petersburg 191002, Russian Federation.
| |
Collapse
|
2
|
Jha S, Kumari N, Chettri B, Dey N. Monitoring Local pH of Membranous Aggregates via Ratiometric Color Changing Response. Chemphyschem 2022; 23:e202200208. [PMID: 35411999 DOI: 10.1002/cphc.202200208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Indexed: 11/05/2022]
Abstract
A series of oxidized di(indolyl)arylmethanes (DIAM) with polyaromatic signaling moieties have been designed for monitoring local pH at interfacial region of surfactant aggregates, such as micelles and vesicles etc. The oxidized DIAMs show changes in solution color from red to yellow when incorporated in cationic surfactants (at pH 7.4) and yellow to reddish pink when exposed to negatively-charged surfactants (at pH 5.0). The changes in surface charge can influence the interfacial pH (distinct from bulk pH of the medium) of the surfactant aggregates. The mechanistic studies indicate the red-shifted absorption maxima observed in the presence of anionic amphiphiles (acidic local pH) was originated from the protonated species. On the contrary, maxima in the blue region, triggered by positively charged amphiphiles (basic local pH), can be attributed to the zwitterionic species. Such prototropic equilibrium affects charge transfer states of the molecules along with their self-assembly properties. Thus, it is evident that probes can predict as well as quantify the local pH change using the pseudophase ion exchange formalism. Also, the probes can detect the presence of anionic amphiphiles even when bound to phospholipid membranes.
Collapse
Affiliation(s)
- Satadru Jha
- Sikkim Manipal Institute of Technology, Chemistry, INDIA
| | | | - Bimal Chettri
- Sikkim Manipal Institute of Technology, Chemistry, INDIA
| | - Nilanjan Dey
- Birla Institute of Technology & Science Pilani - Hyderabad Campus, Chemistry department, Shameerpet, 500078, Hyderabad, INDIA
| |
Collapse
|
3
|
Beltukova DM, Belik VP, Semak BV, Semenova IV, Smolin AG, Vasyutinskii OS. Relaxation dynamics of alkyl derivatives of fluorescein MitoFluo and C 8-Fl in solutions with liposomes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 263:120145. [PMID: 34274636 DOI: 10.1016/j.saa.2021.120145] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 06/23/2021] [Accepted: 06/30/2021] [Indexed: 06/13/2023]
Abstract
We present results of experimental and theoretical studies of excited state dynamics in two alkyl derivatives of fluorescein, MitoFluo and C8-Fl in solutions with liposomes. The liposomes DOPC and soybeanPC + 20% Cardiolipin (Azo-Cl), modelling cellular and inner mitochondrial membranes, respectively, were used in experiments. Both types of liposomes were shown to reduce significantly the fluorescence quantum yield as compared to that of pure fluorescein derivatives in solutions, while DOPC liposomes also caused a noticeable (ca 10 nm) red shift of fluorescence maximum. The study of fluorescence polarization decay has been carried out where important fluorescence parameters: polarization anisotropy, fluorescence lifetimes, and rotational diffusion times have been determined. It was shown that the isotropic fluorescence decay of C8-Fl in liposome containing solutions was single-exponential and the anisotropic decay was double-exponential for both types of lyposomes. In the case of MitoFluo both isotropic and anisotropic fluorescence decays were fitted satisfactory only with double-exponential functions. The interpretation of the experimental data obtained was supported by ab initio calculations of the structure and excitation properties of MitoFluo and C8-Fl in aqueous solution. The analysis of anisotropic fluorescence decay allowed for isolation of the contributions of fluorescein derivatives free in solution from those embedded in liposomes. Also, the experimental data suggest that MitoFluo interacts with liposomes more effectively than C8-Fl. Basing on the experimental and theoretical results obtained we conclude that free C8-Fl and MitoFluo molecules in solution were mostly in their dimer forms.
Collapse
Affiliation(s)
- Dina M Beltukova
- Ioffe Institute, 26 Polytekhnicheskaya, St.Petersburg 194021, Russia
| | - Victor P Belik
- Ioffe Institute, 26 Polytekhnicheskaya, St.Petersburg 194021, Russia
| | - Bogdan V Semak
- Ioffe Institute, 26 Polytekhnicheskaya, St.Petersburg 194021, Russia
| | - Irina V Semenova
- Ioffe Institute, 26 Polytekhnicheskaya, St.Petersburg 194021, Russia.
| | - Andrey G Smolin
- Ioffe Institute, 26 Polytekhnicheskaya, St.Petersburg 194021, Russia
| | | |
Collapse
|
4
|
Algar WR, Massey M, Rees K, Higgins R, Krause KD, Darwish GH, Peveler WJ, Xiao Z, Tsai HY, Gupta R, Lix K, Tran MV, Kim H. Photoluminescent Nanoparticles for Chemical and Biological Analysis and Imaging. Chem Rev 2021; 121:9243-9358. [PMID: 34282906 DOI: 10.1021/acs.chemrev.0c01176] [Citation(s) in RCA: 122] [Impact Index Per Article: 40.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Research related to the development and application of luminescent nanoparticles (LNPs) for chemical and biological analysis and imaging is flourishing. Novel materials and new applications continue to be reported after two decades of research. This review provides a comprehensive and heuristic overview of this field. It is targeted to both newcomers and experts who are interested in a critical assessment of LNP materials, their properties, strengths and weaknesses, and prospective applications. Numerous LNP materials are cataloged by fundamental descriptions of their chemical identities and physical morphology, quantitative photoluminescence (PL) properties, PL mechanisms, and surface chemistry. These materials include various semiconductor quantum dots, carbon nanotubes, graphene derivatives, carbon dots, nanodiamonds, luminescent metal nanoclusters, lanthanide-doped upconversion nanoparticles and downshifting nanoparticles, triplet-triplet annihilation nanoparticles, persistent-luminescence nanoparticles, conjugated polymer nanoparticles and semiconducting polymer dots, multi-nanoparticle assemblies, and doped and labeled nanoparticles, including but not limited to those based on polymers and silica. As an exercise in the critical assessment of LNP properties, these materials are ranked by several application-related functional criteria. Additional sections highlight recent examples of advances in chemical and biological analysis, point-of-care diagnostics, and cellular, tissue, and in vivo imaging and theranostics. These examples are drawn from the recent literature and organized by both LNP material and the particular properties that are leveraged to an advantage. Finally, a perspective on what comes next for the field is offered.
Collapse
Affiliation(s)
- W Russ Algar
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Melissa Massey
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Kelly Rees
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Rehan Higgins
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Katherine D Krause
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Ghinwa H Darwish
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - William J Peveler
- School of Chemistry, Joseph Black Building, University of Glasgow, Glasgow G12 8QQ, U.K
| | - Zhujun Xiao
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Hsin-Yun Tsai
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Rupsa Gupta
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Kelsi Lix
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Michael V Tran
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Hyungki Kim
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| |
Collapse
|
5
|
Liu X, Wu M, Wang M, Duan Y, Phan CU, Chen H, Tang G, Liu B. AIEgen-Lipid Conjugate for Rapid Labeling of Neutrophils and Monitoring of Their Behavior. Angew Chem Int Ed Engl 2021; 60:3175-3181. [PMID: 33084214 DOI: 10.1002/anie.202012594] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 10/13/2020] [Indexed: 12/31/2022]
Abstract
Studies on neutrophil-based nanotherapeutic engineering have shown great potentials in treating infection and inflammation disorders. Conventional neutrophil labeling methods are time-consuming and often result in undesired contamination and activation since neutrophils are terminal-differentiated cells with a half-life span of only 7 h. A simple, fast, and biocompatible strategy to construct engineered neutrophils is highly desirable but remains difficult to achieve. In this study, we present an AIEgen-lipid conjugate, which can efficiently label harvested neutrophils in 30 s with no washing step required. This fast labeling method does not affect the activation and transmigration property of neutrophils, which has been successfully used to monitor neutrophil behaviors such as the chemotaxis process and migrating function towards inflammation sites both in vitro and in vivo, offering a tantalizing prospect for neutrophil-based nanotherapeutics studies.
Collapse
Affiliation(s)
- Xingang Liu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Min Wu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Meng Wang
- Department of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital, Zhejiang University, School of Medicine, Hangzhou, 310003, China
| | - Yukun Duan
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Chi Uyen Phan
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, China
| | - Huan Chen
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Guping Tang
- Department of Chemistry, Zhejiang University, Hangzhou, 310028, China
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore.,Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, 350207, China
| |
Collapse
|
6
|
Liu X, Wu M, Wang M, Duan Y, Phan CU, Chen H, Tang G, Liu B. AIEgen‐Lipid Conjugate for Rapid Labeling of Neutrophils and Monitoring of Their Behavior. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202012594] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xingang Liu
- Department of Chemical and Biomolecular Engineering National University of Singapore 4 Engineering Drive 4 Singapore 117585 Singapore
| | - Min Wu
- Department of Chemical and Biomolecular Engineering National University of Singapore 4 Engineering Drive 4 Singapore 117585 Singapore
| | - Meng Wang
- Department of Hepatobiliary and Pancreatic Surgery, First Affiliated Hospital Zhejiang University School of Medicine Hangzhou 310003 China
| | - Yukun Duan
- Department of Chemical and Biomolecular Engineering National University of Singapore 4 Engineering Drive 4 Singapore 117585 Singapore
| | - Chi Uyen Phan
- Department of Chemistry Zhejiang University Hangzhou 310028 China
| | - Huan Chen
- Department of Chemical and Biomolecular Engineering National University of Singapore 4 Engineering Drive 4 Singapore 117585 Singapore
| | - Guping Tang
- Department of Chemistry Zhejiang University Hangzhou 310028 China
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering National University of Singapore 4 Engineering Drive 4 Singapore 117585 Singapore
- Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City, Fuzhou 350207 China
| |
Collapse
|
7
|
Kundu P, Das S, Chattopadhyay N. Managing efficacy and toxicity of drugs: Targeted delivery and excretion. Int J Pharm 2019; 565:378-390. [DOI: 10.1016/j.ijpharm.2019.04.058] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 04/17/2019] [Accepted: 04/19/2019] [Indexed: 01/03/2023]
|
8
|
Grassano ME, Altamirano MS, Militello MP, Arbeloa EM, Previtali CM, Bertolotti SG. A Comparative Study on the Photophysical and Photochemical Properties of Dyes in the Presence of Low Generation Amino-terminated Polyamidoamine Dendrimers. Photochem Photobiol 2018; 94:1129-1137. [DOI: 10.1111/php.13033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 09/19/2018] [Indexed: 11/29/2022]
Affiliation(s)
- Micaela E. Grassano
- Departamento de Química; Facultad de Ciencias Exactas Físico Químicas y Naturales; Universidad Nacional de Río Cuarto; Río Cuarto Argentina
| | - Marcela S. Altamirano
- Departamento de Química; Facultad de Ciencias Exactas Físico Químicas y Naturales; Universidad Nacional de Río Cuarto; Río Cuarto Argentina
| | - María P. Militello
- Departamento de Química; Facultad de Ciencias Exactas Físico Químicas y Naturales; Universidad Nacional de Río Cuarto; Río Cuarto Argentina
| | - Ernesto M. Arbeloa
- Departamento de Química; Facultad de Ciencias Exactas Físico Químicas y Naturales; Universidad Nacional de Río Cuarto; Río Cuarto Argentina
| | - Carlos M. Previtali
- Departamento de Química; Facultad de Ciencias Exactas Físico Químicas y Naturales; Universidad Nacional de Río Cuarto; Río Cuarto Argentina
| | - Sonia G. Bertolotti
- Departamento de Química; Facultad de Ciencias Exactas Físico Químicas y Naturales; Universidad Nacional de Río Cuarto; Río Cuarto Argentina
| |
Collapse
|
9
|
Taniguchi M, Lindsey JS. Database of Absorption and Fluorescence Spectra of >300 Common Compounds for use in Photochem
CAD. Photochem Photobiol 2018; 94:290-327. [DOI: 10.1111/php.12860] [Citation(s) in RCA: 236] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 10/22/2017] [Indexed: 12/11/2022]
|
10
|
Clay induced changes in the aggregation pattern of Safranine-O in hybrid Langmuir-Blogdgett (LB) films. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.08.053] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
11
|
Afzal M, Kundu P, Das S, Ghosh S, Chattopadhyay N. A promising strategy for improved solubilization of ionic drugs simply by electrostatic pushing. RSC Adv 2017. [DOI: 10.1039/c7ra08056e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Addition of soluble salts to the SDS-bound phenosafranin induces electrostatic pushing of the probe within the micellar interior from its initial location at the micelle–water interface.
Collapse
Affiliation(s)
- Mohd Afzal
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | - Pronab Kundu
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | - Sinjan Das
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | - Saptarshi Ghosh
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | | |
Collapse
|
12
|
Afzal M, Ghosh S, Das S, Chattopadhyay N. Endogenous Activation-Induced Delivery of a Bioactive Photosensitizer from a Micellar Carrier to Natural DNA. J Phys Chem B 2016; 120:11492-11501. [DOI: 10.1021/acs.jpcb.6b08283] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Mohd Afzal
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Saptarshi Ghosh
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | - Sinjan Das
- Department of Chemistry, Jadavpur University, Kolkata 700032, India
| | | |
Collapse
|
13
|
Relocation of a biological photosensitizer from non-ionic micellar carrier to DNA: A multispectroscopic investigation. Biophys Chem 2016; 219:75-81. [PMID: 27794262 DOI: 10.1016/j.bpc.2016.10.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 10/20/2016] [Accepted: 10/20/2016] [Indexed: 12/24/2022]
Abstract
Relocation of a bioactive photosensitizer, namely phenosafranin (PSF), from the phenazinium family, has been demonstrated from non-ionic micellar carrier to the DNA. For the purpose, interaction of micelle-bound PSF with calf thymus DNA (ctDNA) has been investigated vividly exploiting various spectroscopic techniques like absorption, steady state and time resolved emission, fluorescence anisotropy, circular dichroism etc. Experimental outcomes reveal that PSF binds strongly with both the micelle as well as the DNA. In the presence of DNA, however, relocation of the micelle-carried PSF occurs from the micelle to the DNA. Competitive binding of the probe between micelle and the DNA is assigned responsible for this relocation. Circular dichroism spectral measurements reflect that the DNA conformation remains intact in the presence of the micelle advocating that the non-ionic micelles can safely be used for the drug delivery purpose. The work is expected to encourage development of newer carriers for DNA targeted drug delivery.
Collapse
|
14
|
Vimaladevi M, Divya KC, Girigoswami A. Liposomal nanoformulations of rhodamine for targeted photodynamic inactivation of multidrug resistant gram negative bacteria in sewage treatment plant. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 162:146-152. [PMID: 27371913 DOI: 10.1016/j.jphotobiol.2016.06.034] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 06/20/2016] [Indexed: 12/24/2022]
Abstract
The antimicrobial photodynamic therapy is an alternative method for killing bacterial cells in view of the rising problem of antibiotic resistance microorganisms. The present study examined the effect of a water soluble photosensitizer, Rhodamine 6G (R6G) in stealth liposomes on multidrug resistant Pseudomonas aeruginosa in the presence of visible light. Liposomes were prepared with cholesterol and phospholipids that extracted from hen eggs in a cost effective way and characterized by light microscopy, particle size analyzer, electron microscopy, steady state spectrophotometry and spectrofluorometry. The photoefficacies of R6G in polymer encapsulated liposomes and positively charged liposomes are much higher compared to the free R6G (R6G in water) in terms of singlet oxygen quantum yield. This high potential of producing more reactive oxygen species (ROS) by liposomal nanoformulated R6G leads to efficient photodynamic inactivation of multidrug resistant gram negative bacteria in waste water. Though the singlet oxygen quantum yield of polymer coated liposomal R6G was higher than the cationic liposomal formulation, a faster decrease in bacterial survival was observed for positively charged liposomal R6G treated bacteria due to electrostatic charge interactions. Therefore, it can be concluded that the positively charged liposomal nanoformulations of laser dyes are efficient for photodynamic inactivation of multiple drug resistant gram negative microorganisms.
Collapse
Affiliation(s)
- Mohan Vimaladevi
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute (CHRI), Chettinad Academy of Research & Education (CARE), Kelambakkam, Chennai 603 103, India; Biological Materials Laboratory, Central Leather Research Institute (CLRI), Adyar, Chennai 600 020, India
| | - Kurunchi Chellapathi Divya
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute (CHRI), Chettinad Academy of Research & Education (CARE), Kelambakkam, Chennai 603 103, India
| | - Agnishwar Girigoswami
- Faculty of Allied Health Sciences, Chettinad Hospital and Research Institute (CHRI), Chettinad Academy of Research & Education (CARE), Kelambakkam, Chennai 603 103, India.
| |
Collapse
|
15
|
Spectroscopic and calorimetric investigations on the binding of phenazinium dyes safranine-O and phenosafranine to double stranded RNA polynucleotides. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 161:129-40. [PMID: 27236048 DOI: 10.1016/j.jphotobiol.2016.03.062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 03/21/2016] [Accepted: 03/23/2016] [Indexed: 12/13/2022]
Abstract
RNA targeting through small molecules that can selectively bind specific RNA structures is an important current strategy in therapeutic drug development. Towards this strategy a comparative study on the interaction of two phenazinium dyes, safranine-O and phenosafranine to double stranded RNAs, poly(I).poly(C), poly(A).poly(U) and poly(C).poly(G) was performed. Spectrophotometric and spectrofluorimetric studies revealed non-cooperative binding of the dyes to the duplex RNA with binding constants of the order 10(5)M(-1) with a higher affinity of safranine-O to poly(I).poly(C) followed by poly(A).poly(U) and poly(C).poly(G). Anisotropy and fluorescence quenching results confirmed an intercalation mode of binding for the dyes on these RNAs. Binding induced conformational changes in the RNA polynucleotides were revealed from circular dichroism data. Thermal melting study and DSC experiments demonstrated stabilization of dye-RNA complexes. Calorimetric studies revealed that the binding was accompanied by a large positive entropy term with a small negative enthalpy contributions. Significant hydrophobic forces in the complexation of the double stranded RNAs with the dyes were confirmed from the negative heat capacity changes. Enthalpy-entropy compensation was also observed in the binding. Parsing of the Gibbs energy suggested a larger non-electrostatic contribution in all the cases. The results presented here may be helpful to design new types of RNA-based therapeutic agents.
Collapse
|
16
|
Kundu P, Ghosh S, Das S, Chattopadhyay N. Cyclodextrin induced controlled delivery of a biological photosensitizer from a nanocarrier to DNA. Phys Chem Chem Phys 2016; 18:3685-93. [DOI: 10.1039/c5cp06174a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Addition of β-cyclodextrin to the micelle bound phenosafranin in the presence of ctDNA leads to quantitative transfer of the fluorophore from the micelle to the DNA.
Collapse
Affiliation(s)
- Pronab Kundu
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | - Saptarshi Ghosh
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | - Sinjan Das
- Department of Chemistry
- Jadavpur University
- Kolkata-700032
- India
| | | |
Collapse
|
17
|
Ghosh S, Kundu P, Chattopadhyay N. DNA induced sequestration of a bioactive cationic fluorophore from the lipid environment: A spectroscopic investigation. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 154:118-25. [DOI: 10.1016/j.jphotobiol.2015.11.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 10/29/2015] [Accepted: 11/01/2015] [Indexed: 12/28/2022]
|
18
|
Kundu P, Ghosh S, Jana B, Chattopadhyay N. Binding interaction of differently charged fluorescent probes with egg yolk phosphatidylcholine and the effect of β-cyclodextrin on the lipid-probe complexes: a fluorometric investigation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 142:15-24. [PMID: 25698439 DOI: 10.1016/j.saa.2015.01.038] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 01/20/2015] [Indexed: 06/04/2023]
Abstract
Interaction of cationic phenosafranin (PSF), anionic 8-anilino-1-naphthalene sulfonate (ANS) and non-ionic nile red (NR) have been studied with the zwitterionic phospholipid, egg yolk L-α-phosphatidylcholine (EYPC). The study reveals discernible binding interactions of the three fluorescent probes with the EYPC lipid vesicle. Once the binding of the probes with the lipid is established, the effect of cyclic oligosaccharide, β-cyclodextrin (β-CD), on these lipid bound probes has been investigated. Different fluorometric techniques suggest that addition of β-CD to the probe-lipid complexes leads to the release of the probes from the lipid medium through the formation of probe-β-CD inclusion complexes. A competitive binding of the probes between β-cyclodextrin and the lipid is ascribed to be responsible for the effect. This provides an easy avenue for the removal of the probe molecules from the lipid environment. Extension of this work with drug molecules in cell membranes is expected to give rise to a strategy for the removal of adsorbed drugs from the cell membranes by the use of non-toxic β-cyclodextrin.
Collapse
Affiliation(s)
- Pronab Kundu
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Saptarshi Ghosh
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Barnali Jana
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | | |
Collapse
|
19
|
Sierant M, Kazmierski S, Rozanski A, Paluch P, Bienias U, Miksa BJ. Nanocapsules for 5-fluorouracil delivery decorated with a poly(2-ethylhexyl methacrylate-co-7-(4-trifluoromethyl)coumarin acrylamide) cross-linked wall. NEW J CHEM 2015. [DOI: 10.1039/c4nj02053g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanocapsules with reverse cross-linked polymer walls containing coumarin moieties are capable of encapsulating 5-fluorouracil and accomplishing a comprehensive strategy in a drug delivery system.
Collapse
Affiliation(s)
- M. Sierant
- Centre of Molecular and Macromolecular Studies
- Polish Academy of Science
- 90-363 Lodz
- Poland
| | - S. Kazmierski
- Centre of Molecular and Macromolecular Studies
- Polish Academy of Science
- 90-363 Lodz
- Poland
| | - A. Rozanski
- Centre of Molecular and Macromolecular Studies
- Polish Academy of Science
- 90-363 Lodz
- Poland
| | - P. Paluch
- Centre of Molecular and Macromolecular Studies
- Polish Academy of Science
- 90-363 Lodz
- Poland
| | - U. Bienias
- Centre of Molecular and Macromolecular Studies
- Polish Academy of Science
- 90-363 Lodz
- Poland
| | - B. J. Miksa
- Centre of Molecular and Macromolecular Studies
- Polish Academy of Science
- 90-363 Lodz
- Poland
| |
Collapse
|
20
|
Santos WG, Scurachio RS, Cardoso DR. Photochemical behavior of Safranine-Riboflavin complex in the degradation of folic acid. J Photochem Photobiol A Chem 2014. [DOI: 10.1016/j.jphotochem.2014.07.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
21
|
GHOSH SAPTARSHI, PAUL BIJANKUMAR, CHATTOPADHYAY NITIN. Interaction of cyclodextrins with human and bovine serum albumins: A combined spectroscopic and computational investigation. J CHEM SCI 2014. [DOI: 10.1007/s12039-014-0652-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
22
|
Ghosh S, Chakrabarty S, Bhowmik D, Kumar GS, Chattopadhyay N. Stepwise Unfolding of Bovine and Human Serum Albumin by an Anionic Surfactant: An Investigation Using the Proton Transfer Probe Norharmane. J Phys Chem B 2014; 119:2090-102. [DOI: 10.1021/jp501150p] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Saptarshi Ghosh
- Department
of Chemistry, Jadavpur University, Kolkata 700 032, India
| | | | - Debipreeta Bhowmik
- Biophysical
Chemistry Laboratory, Chemistry Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India
| | - Gopinatha Suresh Kumar
- Biophysical
Chemistry Laboratory, Chemistry Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India
| | | |
Collapse
|
23
|
Khan AY, Saha B, Suresh Kumar G. Phenazinium dyes safranine O and phenosafranine induce self-structure in single stranded polyadenylic acid: structural and thermodynamic studies. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 132:17-26. [PMID: 24565690 DOI: 10.1016/j.jphotobiol.2014.01.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 12/30/2013] [Accepted: 01/19/2014] [Indexed: 11/29/2022]
Abstract
The interaction of phenazinium dyes, safranine O and phenosafranine with single stranded polyadenylic acid was studied using spectroscopic viscometric and calorimetric techniques. Both dyes bind to polyadenylic acid strongly with association constant of the order of 10(5)M(-1). Safranine O showed higher affinity over phenosafranine. The binding induced conformational changes in polyadenylic acid, but the extent of change was much higher with safranine O. The bound safranine O molecules acquired strong induced circular dichroism spectra compared to the weak induced circular dichroism of phenosafranine. Fluorescence polarization, iodide quenching, viscosity results and energy transfer from bases to bound dyes suggested intercalation of the dye molecules to polyadenylic acid structure. The binding was entropy driven in both the cases. Circular dichroism and optical melting studies revealed cooperative melting profiles for dye-polyadenylic acid complexes that provided evidence for the formation of self-structured polyadenylic acid on dye binding. This structural reorganization was further confirmed by differential scanning calorimetry results.
Collapse
Affiliation(s)
- Asma Yasmeen Khan
- Biophysical Chemistry Laboratory, Chemistry Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India
| | - Baishakhi Saha
- Biophysical Chemistry Laboratory, Chemistry Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India
| | - Gopinatha Suresh Kumar
- Biophysical Chemistry Laboratory, Chemistry Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700 032, India.
| |
Collapse
|
24
|
Pradhan AB, Haque L, Roy S, Das S. Binding of phenazinium dye safranin T to polyriboadenylic acid: spectroscopic and thermodynamic study. PLoS One 2014; 9:e87992. [PMID: 24498422 PMCID: PMC3912202 DOI: 10.1371/journal.pone.0087992] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 01/02/2014] [Indexed: 11/18/2022] Open
Abstract
Here, we report results from experiments designed to explore the association of the phenazinium dye safranin T (ST, 3,7-diamino-2,8-dimethyl-5-phenylphenazinium chloride) with single and double stranded form of polyriboadenylic acid (hereafter poly-A) using several spectroscopic techniques. We demonstrate that the dye binds to single stranded polyriboadenylic acid (hereafter ss poly-A) with high affinity while it does not interact at all with the double stranded (ds) form of the polynucleotide. Fluorescence and absorption spectral studies reveal the molecular aspects of binding of ST to single stranded form of the polynucleotide. This observation is also supported by the circular dichroism study. Thermodynamic data obtained from temperature dependence of binding constant reveals that association is driven by negative enthalpy change and opposed by negative entropy change. Ferrocyanide quenching studies have shown intercalative binding of ST to ss poly-A. Experiments on viscosity measurements confirm the binding mode of the dye to be intercalative. The effect of [Na⁺] ion concentration on the binding process suggests the role of electrostatic forces in the complexation. Present studies reveal the utility of the dye in probing nucleic acid structure.
Collapse
Affiliation(s)
| | - Lucy Haque
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata, India
| | - Snigdha Roy
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata, India
| | - Suman Das
- Department of Chemistry, Jadavpur University, Jadavpur, Kolkata, India
| |
Collapse
|
25
|
Das S, Parveen S, Pradhan AB. An insight into the interaction of phenanthridine dyes with polyriboadenylic acid: spectroscopic and thermodynamic approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 118:356-366. [PMID: 24060481 DOI: 10.1016/j.saa.2013.08.106] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Revised: 08/17/2013] [Accepted: 08/23/2013] [Indexed: 06/02/2023]
Abstract
Interaction of two phenanthridine dyes, namely ethidium bromide (EB) and propidium iodide (PI) with polyriboadenylic acid was investigated using various spectroscopic techniques. They were found to bind only with the single stranded form of the polymer, while no affinity was observed for the double stranded form. Enhanced binding observed for PI compared to EB may be attributed to the presence of external alkyl chain in PI. Thermodynamic studies showed negative enthalpy and negative entropy changes for the binding of both the dyes. Salt dependent studies revealed a lesser electrolytic contribution compared to the nonelectrolytic contribution to the total Gibbs free energy change in each case. This indicated importance of hydrophobic and van der Waal's interaction for the binding process. Overall, the binding data and detail energetics of interaction presented here would be helpful in the design of phenanthridine based molecules that interact with specific RNA structure.
Collapse
Affiliation(s)
- Suman Das
- Department of Chemistry, Jadavpur University, Raja S.C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | | | | |
Collapse
|
26
|
Ghosh S, Kundu P, Paul BK, Chattopadhyay N. Binding of an anionic fluorescent probe with calf thymus DNA and effect of salt on the probe–DNA binding: a spectroscopic and molecular docking investigation. RSC Adv 2014. [DOI: 10.1039/c4ra14298e] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Binding mode of biologically relevant anionic probe, ANS, with ctDNA is divulged from spectroscopic and molecular docking studies.
Collapse
Affiliation(s)
- Saptarshi Ghosh
- Department of Chemistry
- Jadavpur University
- Kolkata – 700032, India
| | - Pronab Kundu
- Department of Chemistry
- Jadavpur University
- Kolkata – 700032, India
| | - Bijan Kumar Paul
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- Bhopal 462066, India
| | | |
Collapse
|
27
|
Pradhan AB, Haque L, Bhuiya S, Das S. Induction of self-structure in polyriboadenylic acid by the benzophenanthridine plant alkaloid chelerythrine: a spectroscopic approach. RSC Adv 2014. [DOI: 10.1039/c4ra07075e] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Induction of self-structure in polyriboadenylic acid by chelerythrine.
Collapse
Affiliation(s)
| | - Lucy Haque
- Department of Chemistry
- Jadavpur University
- Kolkata 700 032, India
| | - Sutanwi Bhuiya
- Department of Chemistry
- Jadavpur University
- Kolkata 700 032, India
| | - Suman Das
- Department of Chemistry
- Jadavpur University
- Kolkata 700 032, India
| |
Collapse
|
28
|
Dodecyl and octyl esters of fluorescein as protonophores and uncouplers of oxidative phosphorylation in mitochondria at submicromolar concentrations. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2014; 1837:149-58. [DOI: 10.1016/j.bbabio.2013.09.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 09/12/2013] [Accepted: 09/18/2013] [Indexed: 11/18/2022]
|
29
|
Ghosh D, Chattopadhyay N. Equilibrium and dynamic effects on ligand binding to biomacromolecules and biomimetic model systems. INT REV PHYS CHEM 2013. [DOI: 10.1080/0144235x.2013.782683] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
30
|
Jana B, Ghosh S, Chattopadhyay N. Competitive binding of nile red between lipids and β-cyclodextrin. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2013; 126:1-10. [PMID: 23871993 DOI: 10.1016/j.jphotobiol.2013.06.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 06/10/2013] [Accepted: 06/11/2013] [Indexed: 11/30/2022]
Abstract
Fluorometric measurements are exploited to explore the binding interactions of nile red (NR) with anionic lipid dimyristoyl-L-α-phosphatidylglycerol (DMPG), zwitterionic lipid dimyristoyl-L-α-phosphatidylcholine (DMPC) as well as neutral cyclic oligosaccharide β-cyclodextrin (β-CD) solutions. The binding constants are found to be quite high and comparable (within a factor of five). Series of spectral techniques like steady state fluorescence and fluorescence anisotropy study, micropolarity study, quenching study and time resolved experiments reveal that the addition of β-CD to the probe-lipid complexes results in weakening of the lipid-probe interaction and formation of probe-β-CD inclusion complexes leading to the removal of some of the probe (NR) molecules from the lipid environments. The extent of removal of NR is, however, more from DMPG than DMPC lipid. The phenomena are explained from the concept of competitive binding of the probe between the lipids and β-CD. Since lipids are the principal constituents of the cell walls, the work might make a foundation for the possible removal of excess of molecules like nile red adsorbed on the cell walls.
Collapse
Affiliation(s)
- Barnali Jana
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | | | | |
Collapse
|
31
|
Bozkurt E, Bayraktutan T, Acar M, Toprak M. Spectroscopic studies on the interaction of fluorescein and safranine T in PC liposomes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 101:31-35. [PMID: 23099157 DOI: 10.1016/j.saa.2012.09.082] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Revised: 08/10/2012] [Accepted: 09/24/2012] [Indexed: 06/01/2023]
Abstract
In this study, the fluorescence quenching of fluorescein by safranine T in liposome media had been investigated systematically by fluorescence spectroscopy, UV-vis absorption spectroscopy and fluorescence decay lifetime measurements. The spectroscopic data were analyzed using a Stern-Volmer equation to determine the quenching process. The experimental results showed that the intrinsic fluorescence of fluorescein was strongly quenched by safranine T, and that the quenching mechanism was considered as static quenching by forming a ground-complex. The Stern-Volmer quenching constant Ksv, and the bimolecular quenching constant Kq were estimated. The distances between the donor (fluorescein) and the acceptor (safranine T) were calculated according to the Förster non-radiation energy transfer theory. In addition, the partition coefficient of the safranine T (Kp) in the L-egg lecithin phosphatidylcholine liposomes was also calculated by utilizing the fluorescence quenching.
Collapse
Affiliation(s)
- Ebru Bozkurt
- Department of Chemistry, Atatürk University, Erzurum 25240, Turkey
| | | | | | | |
Collapse
|
32
|
Jana B, Senapati S, Ghosh D, Bose D, Chattopadhyay N. Spectroscopic Exploration of Mode of Binding of ctDNA with 3-Hydroxyflavone: A Contrast to the Mode of Binding with Flavonoids Having Additional Hydroxyl Groups. J Phys Chem B 2011; 116:639-45. [DOI: 10.1021/jp2094824] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Barnali Jana
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Sudipta Senapati
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Debanjana Ghosh
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | - Debosreeta Bose
- Department of Chemistry, Jadavpur University, Kolkata 700 032, India
| | | |
Collapse
|
33
|
Saha I, Hossain M, Suresh Kumar G. Sequence-selective binding of phenazinium dyes phenosafranin and safranin O to guanine-cytosine deoxyribopolynucleotides: spectroscopic and thermodynamic studies. J Phys Chem B 2010; 114:15278-87. [PMID: 20979425 DOI: 10.1021/jp1064598] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The sequence selectivity of the DNA binding of the phenazinium dyes phenosafranin and safranin O have been investigated with four sequence-specific deoxyribopolynucleotides from spectroscopic and calorimetric studies. The alternating guanine-cytosine sequence selectivity of the dyes has been revealed from binding affinity values, circular dichroism, thermal melting, competition dialysis, and calorimetric results. The binding affinities of both the dyes to the polynucleotides were of the order of 10(5) M(-1), but the values were higher for the guanine-cytosine polynucleotides over adenine-thymine ones. Phenosafranin had a higher binding affinity compared to safranin O. Isothermal titration calorimetric studies revealed that the binding reactions were exothermic and favored by negative enthalpy and predominantly large positive entropy contributions in all cases except poly(dA)·poly(dT) where the profile was anomalous. Although charged, nonpolyelectrolytic contribution was revealed to be dominant to the free energy of binding. The negative heat capacity values obtained from the temperature dependence of enthalpy changes, which were higher for phenosafranin compared to safranin O, suggested significant hydrophobic contribution to the binding process. In aggregate, the data presents evidence for the alternating guanine-cytosine base pair selectivity of these phenazinium dyes and a stronger binding of phenosafranin over safranin O.
Collapse
Affiliation(s)
- Ishita Saha
- Biophysical Chemistry Laboratory, Indian Institute of Chemical Biology (CSIR), Kolkata 700 032, India
| | | | | |
Collapse
|
34
|
Saha I, Kumar GS. Spectroscopic Characterization of the Interaction of Phenosafranin and Safranin O with Double Stranded, Heat Denatured and Single Stranded Calf Thymus DNA. J Fluoresc 2010; 21:247-55. [DOI: 10.1007/s10895-010-0712-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2010] [Accepted: 08/16/2010] [Indexed: 11/29/2022]
|
35
|
Garner LE, Park J, Dyar SM, Chworos A, Sumner JJ, Bazan GC. Modification of the Optoelectronic Properties of Membranes via Insertion of Amphiphilic Phenylenevinylene Oligoelectrolytes. J Am Chem Soc 2010; 132:10042-52. [DOI: 10.1021/ja1016156] [Citation(s) in RCA: 110] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Logan E. Garner
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, U.S. Army Research Laboratory, Sensors and Electron Devices Directorate, Adelphi, Maryland 20783, and School of Chemical Engineering and Materials Science, Chung-Ang University, 221 Heukseok-Dong, Dongjak-Gu, Seoul, Korea
| | - Juhyun Park
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, U.S. Army Research Laboratory, Sensors and Electron Devices Directorate, Adelphi, Maryland 20783, and School of Chemical Engineering and Materials Science, Chung-Ang University, 221 Heukseok-Dong, Dongjak-Gu, Seoul, Korea
| | - Scott M. Dyar
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, U.S. Army Research Laboratory, Sensors and Electron Devices Directorate, Adelphi, Maryland 20783, and School of Chemical Engineering and Materials Science, Chung-Ang University, 221 Heukseok-Dong, Dongjak-Gu, Seoul, Korea
| | - Arkadiusz Chworos
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, U.S. Army Research Laboratory, Sensors and Electron Devices Directorate, Adelphi, Maryland 20783, and School of Chemical Engineering and Materials Science, Chung-Ang University, 221 Heukseok-Dong, Dongjak-Gu, Seoul, Korea
| | - James J. Sumner
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, U.S. Army Research Laboratory, Sensors and Electron Devices Directorate, Adelphi, Maryland 20783, and School of Chemical Engineering and Materials Science, Chung-Ang University, 221 Heukseok-Dong, Dongjak-Gu, Seoul, Korea
| | - Guillermo C. Bazan
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, U.S. Army Research Laboratory, Sensors and Electron Devices Directorate, Adelphi, Maryland 20783, and School of Chemical Engineering and Materials Science, Chung-Ang University, 221 Heukseok-Dong, Dongjak-Gu, Seoul, Korea
| |
Collapse
|
36
|
Saha I, Hossain M, Kumar GS. Base pair specificity and energetics of binding of the phenazinium molecules phenosafranine and safranine-O to deoxyribonucleic acids: a comparative study. Phys Chem Chem Phys 2010; 12:12771-9. [DOI: 10.1039/c001062f] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|