1
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pH tolerant metal ion controlled luminescence behaviour of supramolecular assembly and its application in bioimaging and supramolecular logic gate. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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2
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Unraveling pH-responsive contrasting supramolecular interaction of acridine orange with γ-Cyclodextrin. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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3
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Tailoring Niosomes- Implications for Controlled Cargo Release and Function as Nanoreactors. J Fluoresc 2022; 32:907-920. [PMID: 35102460 DOI: 10.1007/s10895-022-02894-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 01/18/2022] [Indexed: 10/19/2022]
Abstract
Nonionic surfactant vesicles (Niosomes) were prepared using polyoxyethylene alkyl ether (Brij 58).The impact of variation of the Brij: cholesterol molar ratio on the niosomal structure was studied. Fluorescence studies performed with the membrane probe 1,6-Diphenyl-1,3,5-triene (DPH) gave important insight on the bilayer integrity of the niosomes in response to environmental perturbations. The aim of the work being assessment of the efficacy of the niosomes as "drug release vehicles", release studies were performed with a xanthene dye Carboxyfluorescein (CF). Further, the vesicles were used as nanoreactors for the synthesis of gold nanoparticles (GNPs) as it is often useful to house nanoparticles in biological /biomimicking environments. Stable, spherical GNPs of diameter 6-10 nm were formed in these vesicles. As the vesicular bilayer mimics the cell membrane, the present work is relevant to the use of the GNPs for diagnostic and therapeutic purpose. It has also been established that fluorescence resonance energy transfer (FRET) effectively occurs between DPH and CF in the niosomes. The FRET studies provide important insight on the location of dyes within the vesicles thus indicating the prospective applications of this fluorescence technique for tracking the location of probes in biomimicking systems which maybe extrapolated to in vivo biological systems in future.
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4
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Sayed M, Pal H. An overview from simple host-guest systems to progressively complex supramolecular assemblies. Phys Chem Chem Phys 2021; 23:26085-26107. [PMID: 34787121 DOI: 10.1039/d1cp03556h] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Supramolecular chemistry involving macrocyclic hosts is a highly interdisciplinary and fast-growing research field in chemistry, biochemistry, and materials science. Host-guest based supramolecular assemblies, as constructed through non-covalent interactions, are highly dynamic in nature, and can be tuned easily using their responses to various external stimuli, providing a convenient approach to achieve excellent functional materials. Macrocyclic hosts, particularly cyclodextrins, cucurbit[n]urils, and calix[n]arenes, which have unique features like possessing hydrophobic cavities of different sizes, along with hydrophilic external surfaces, which are also amenable towards easy derivatizations, are versatile cavitands or host molecules to encapsulate diverse guest molecules to form stable host-guest complexes with many unique structures and properties. Interestingly, host-guest complexes possessing amphiphilic properties can easily lead to the formation of various advanced supramolecular assemblies, like pseudorotaxanes, rotaxanes, polyrotaxanes, supramolecular polymers, micelles, vesicles, supramolecular nanostructures, and so on. Moreover, these supramolecular assemblies, with varied morphologies and responsiveness towards external stimuli, have immense potential for applications in nanotechnology, materials science, biosensors, drug delivery, analytical chemistry and biomedical sciences. In this perspective, we present a stimulating overview, discussing simple host-guest systems to complex supramolecular assemblies in a systematic manner, aiming to encourage future researchers in this fascinating area of supramolecular chemistry to develop advanced supramolecular materials with superior functionalities, for their deployment in diverse applied areas.
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Affiliation(s)
- Mhejabeen Sayed
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
| | - Haridas Pal
- Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India.,Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India.
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5
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Yaroshenko NS, Kostjukova LO, Kostjukov VV. Excited states of six oxazine 1 conformers in aqueous solution: TD-DFT/DFT study. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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6
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Chakraborty G, Pillai VS, Chittela RK. Complexation-induced tuning of optical properties of a medically important alkaloid, berberine in the presence of charged cyclodextrin. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113454] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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7
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1′-hydroxy-2′-acetonaphthone: A simple fluorescence turn-on signaling probe with high selectivity and sensitivity for Al3+ in pure water. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113431] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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8
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Saifi A, Joseph JP, Singh AP, Pal A, Kumar K. Complexation of an Azo Dye by Cyclodextrins: A Potential Strategy for Water Purification. ACS OMEGA 2021; 6:4776-4782. [PMID: 33644585 PMCID: PMC7905815 DOI: 10.1021/acsomega.0c05684] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 01/27/2021] [Indexed: 06/12/2023]
Abstract
The chemistry of the host-guest complex formation has received much attention as a highly efficient approach for use to develop economical adsorbents for water purification. In the present study, the synthesis of three β-cyclodextrin (β-CD) inclusion complexes with the oil orange SS (OOSS) azo dye as a guest molecule and their potential applications in water purification are described. The complexes were synthesized by the coprecipitation method and characterized by Fourier transform infrared (FTIR) spectroscopy, UV-vis spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). FTIR and thermal analyses confirmed the encapsulation of OOSS dye within the hydrophobic cavity of β-CD. The encapsulation of hydrophobic dye inside the β-CD cavity was mainly due to the hydrophobic-hydrophobic interaction. The results showed that the stability of the OOSS dye had been improved after the complexation. The effect of three different compositions of the host-guest complexes was analyzed. The present study demonstrated that the hydrophobic dye could be removed from aqueous solution via inclusion complex formation. Thus, it can play a significant role in removing the highly toxic OOSS dye from the industrial effluent.
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Affiliation(s)
- Anas Saifi
- CSIR-Central
Scientific Instruments Organisation, Sector 30, Chandigarh 160030, India
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Jojo P. Joseph
- Institute
of Nano Science and Technology, Sector 64, Mohali 160062, Punjab, India
| | - Atul Pratap Singh
- Department
of Chemistry, Chandigarh University, Gharuan, Mohali 140413, Punjab, India
| | - Asish Pal
- Institute
of Nano Science and Technology, Sector 64, Mohali 160062, Punjab, India
| | - Kamlesh Kumar
- CSIR-Central
Scientific Instruments Organisation, Sector 30, Chandigarh 160030, India
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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9
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Dutta Choudhury S, Pal H. Supramolecular and suprabiomolecular photochemistry: a perspective overview. Phys Chem Chem Phys 2021; 22:23433-23463. [PMID: 33112299 DOI: 10.1039/d0cp03981k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In this perspective review article, we have attempted to bring out the important current trends of research in the areas of supramolecular and suprabiomolecular photochemistry. Since the spans of the subject areas are very vast, it is impossible to cover all the aspects within the limited space of this review article. Nevertheless, efforts have been made to assimilate the basic understanding of how supramolecular interactions can significantly change the photophysical and other related physiochemical properties of chromophoric dyes and drugs, which have enormous academic and practical implications. We have discussed with reference to relevant chemical systems where supramolecularly assisted modulations in the properties of chromophoric dyes and drugs can be used or have already been used in different areas like sensing, dye/drug stabilization, drug delivery, functional materials, and aqueous dye laser systems. In supramolecular assemblies, along with their conventional photophysical properties, the acid-base properties of prototropic dyes, as well as the excited state prototautomerization and related proton transfer behavior of proton donor/acceptor dye molecules, are also largely modulated due to supramolecular interactions, which are often reflected very explicitly through changes in their absorption and fluorescence characteristics, providing us many useful insights into these chemical systems and bringing out intriguing applications of such changes in different applied areas. Another interesting research area in supramolecular photochemistry is the excitation energy transfer from the donor to acceptor moieties in self-assembled systems which have immense importance in light harvesting applications, mimicking natural photosynthetic systems. In this review article, we have discussed varieties of these aspects, highlighting their academic and applied implications. We have tried to emphasize the progress made so far and thus to bring out future research perspectives in the subject areas concerned, which are anticipated to find many useful applications in areas like sensors, catalysis, electronic devices, pharmaceuticals, drug formulations, nanomedicine, light harvesting, and smart materials.
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Affiliation(s)
- Sharmistha Dutta Choudhury
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Mumbai-400085, India. and Homi Bhabha National Institute, Anushaktinagar, Trombay, Mumbai-400094, India
| | - Haridas Pal
- Homi Bhabha National Institute, Anushaktinagar, Trombay, Mumbai-400094, India and Analytical Chemistry Division, Bhabha Atomic Research Centre, Mumbai-400085, India.
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10
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Chakraborty G, Singh PK, Pal H. A cationic cyclodextrin assisted aggregation of an anionic pyrene derivative and its stimuli responsive behavior. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114499] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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11
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Sayed M, Balayan J, Singh PK, Pal H. Modulation of excited-state photodynamics of ESIPT probe 1′-hydroxy-2′-acetonaphthone (HAN) on interaction with bovine serum albumin. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112651] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Aqueous on/off fluorescent switches based on systems of quinoline / quinoline-macrocycle. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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β-Cyclodextrin polymer based fluorescence enhancement method for sensitive adenosine triphosphate detection. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.03.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Chakraborty G, Ray AK, Singh PK, Pal H. A styryl based fluorogenic probe with high affinity for a cyclodextrin derivative. Org Biomol Chem 2019; 17:6895-6904. [DOI: 10.1039/c9ob01349k] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A styryl-based fluorogenic near-IR probe registers a very high association constant with sulfobutylether substituted β-cyclodextrin host, having prospects as biological marker and improved pH and temperature sensor.
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Affiliation(s)
- Goutam Chakraborty
- Laser and Plasma Technology Division
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
- Homi Bhabha National Institute
| | - Alok K. Ray
- Laser and Plasma Technology Division
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
- Homi Bhabha National Institute
| | - Prabhat K. Singh
- Homi Bhabha National Institute
- Mumbai 400094
- India
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
| | - Haridas Pal
- Homi Bhabha National Institute
- Mumbai 400094
- India
- Analytical Chemistry Division
- Bhabha Atomic Research Centre
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15
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Sayed M, Panjwani S, Pal H. Sulfated β-Cyclodextrin Templated Assembly and Disassembly of Acridine Orange: Unraveling Contrasting Binding Mechanisms and Light Off/On Switching. ChemistrySelect 2018. [DOI: 10.1002/slct.201801563] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mhejabeen Sayed
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
| | - Shirin Panjwani
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
| | - Haridas Pal
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre, Mumbai 400 085, India & Homi Bhabha National Institute, Anushaktinagar; Mumbai 400 094 India
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16
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Boraste DR, Chakraborty G, Ray AK, Shankarling GS, Pal H. Supramolecular host-guest interaction of antibiotic drug ciprofloxacin with cucurbit[7]uril macrocycle: Modulations in photophysical properties and enhanced photostability. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.02.037] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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17
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Biswas S, Santra S, Yesylevskyy S, Maiti J, Jana M, Das R. Picosecond Solvation Dynamics in Nanoconfinement: Role of Water and Host-Guest Complexation. J Phys Chem B 2018. [PMID: 29527896 DOI: 10.1021/acs.jpcb.7b10376] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The dynamics of solvation of an excited chromophore, 5-(4″-dimethylaminophenyl)-2-(4'-sulfophenyl)oxazole, sodium salt (DMO), has been explored in confined nanoscopic environments of β-cyclodextrin (βCD) and heptakis(2,6-di- O-methyl)-β-cyclodextrin (DIMEB). Solvation occurs on a distinctly slower time scale (τS3 ∼ 47 ps, τS4 ∼ 517 ps) in the host cavity of DIMEB than in that of βCD (τS3 ∼ 20 ps, τS4 ∼ 174 ps). The calculated equilibrium solvation response of DMO was characterized by four relaxation components (τS1 ∼ 0.46-0.48 ps, τS2 ∼ 3.2-3.4 ps, τS3 ∼ 32.3-37.7 ps, and τS4 ∼ 232-485 ps), of which the longer ones (τS3, τS4) are well-consistent with experiments, whereas the ultrafast components (τS1, τS2) are unresolved. The observed time constant (τS3) within the ∼20-47 ps range arises from slow water molecules in the primary hydration layers of the host CDs and is slower for DIMEB than for βCD presumably due to longer-lived and stronger hydrogen bonds that water forms with the former host relative to the latter. Decomposition of the calculated solvation response of DMO has revealed that conformational fluctuations of the macrocyclic hosts give rise to the observed long-time relaxation component (τS4), which is much slower for the inclusion complexes with DIMEB than for those with βCD because of slower conformational dynamics of the former host than that of the latter.
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Affiliation(s)
- Suman Biswas
- Department of Chemistry , West Bengal State University , Barasat, Kolkata 700126 , India
| | - Santanu Santra
- Molecular Simulation Laboratory, Department of Chemistry , National Institute of Technology , Rourkela 769008 , Orissa , India
| | - Semen Yesylevskyy
- Institute of Physics , National Academy of Sciences of Ukraine , 03028 Kyiv , Ukraine
| | - Jyotirmay Maiti
- Department of Chemistry , West Bengal State University , Barasat, Kolkata 700126 , India
| | - Madhurima Jana
- Molecular Simulation Laboratory, Department of Chemistry , National Institute of Technology , Rourkela 769008 , Orissa , India
| | - Ranjan Das
- Department of Chemistry , West Bengal State University , Barasat, Kolkata 700126 , India
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18
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Boraste DR, Chakraborty G, Ray AK, Shankarling GS, Pal H. pH-Responsive Interaction of Fluorogenic Antimalarial Drug Quinine with Macrocyclic Host Cucurbit[7]uril: Modulations in Photophysical and Acid-Base Properties. ChemistrySelect 2017. [DOI: 10.1002/slct.201700686] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Deepak R. Boraste
- Department of Dyestuff Technology; Institute of Chemical Technology; Matunga Mumbai- 400019 India
| | - Goutam Chakraborty
- Laser & Plasma Technology Division, BARC; Mumbai- 400085 India & Homi Bhabha National Institute, Anushaktinagar, Mumbai-400094, India
| | - Alok K. Ray
- Laser & Plasma Technology Division, BARC; Mumbai- 400085 India & Homi Bhabha National Institute, Anushaktinagar, Mumbai-400094, India
| | - Ganapati S. Shankarling
- Department of Dyestuff Technology; Institute of Chemical Technology; Matunga Mumbai- 400019 India
| | - Haridas Pal
- Radiation & Photochemistry Division, BARC; Mumbai- 400085 India & Homi Bhabha National Institute, Anushaktinagar, Mumbai-400094, India
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19
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McTernan HL, Ngo HT, Pham DT, Clements P, Lincoln SF, Wang J, Guo X, Easton CJ. Host-Guest Chemistry of Linked β- and γ-Cyclodextrin Dimers and 1- and 2-Naphthyl-Sulfonamide Substituted Poly(acrylate)s in Aqueous Solution. ChemistrySelect 2017. [DOI: 10.1002/slct.201601630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hamish L. McTernan
- Department of Chemistry; University of Adelaide; Adelaide SA 5005 Australia
| | - Huy T. Ngo
- Department of Chemistry; University of Adelaide; Adelaide SA 5005 Australia
| | - Duc-Truc Pham
- Department of Chemistry; University of Adelaide; Adelaide SA 5005 Australia
| | - Philip Clements
- Department of Chemistry; University of Adelaide; Adelaide SA 5005 Australia
| | - Stephen F. Lincoln
- Department of Chemistry; University of Adelaide; Adelaide SA 5005 Australia
| | - Jie Wang
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 China
| | - Xuhong Guo
- State Key Laboratory of Chemical Engineering; East China University of Science and Technology; Shanghai 200237 China
| | - Christopher J. Easton
- Research School of Chemistry; Australian National University; Canberra ACT 2601 Australia
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20
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Sayed M, Jha S, Pal H. Complexation induced aggregation and deaggregation of acridine orange with sulfobutylether-β-cyclodextrin. Phys Chem Chem Phys 2017; 19:24166-24178. [DOI: 10.1039/c7cp03135a] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The present study illustrates intriguing switching of multi-mode binding interactions of acridine orange dye with a sulfobutylether-β-cyclodextrin host.
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Affiliation(s)
- Mhejabeen Sayed
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
| | - Shruti Jha
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
| | - Haridas Pal
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
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21
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El Najjar F, Cifuentes-Muñoz N, Chen J, Zhu H, Buchholz UJ, Moncman CL, Dutch RE. Human metapneumovirus Induces Reorganization of the Actin Cytoskeleton for Direct Cell-to-Cell Spread. PLoS Pathog 2016; 12:e1005922. [PMID: 27683250 PMCID: PMC5040343 DOI: 10.1371/journal.ppat.1005922] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 09/08/2016] [Indexed: 11/22/2022] Open
Abstract
Paramyxovirus spread generally involves assembly of individual viral particles which then infect target cells. We show that infection of human bronchial airway cells with human metapneumovirus (HMPV), a recently identified paramyxovirus which causes significant respiratory disease, results in formation of intercellular extensions and extensive networks of branched cell-associated filaments. Formation of these structures is dependent on actin, but not microtubule, polymerization. Interestingly, using a co-culture assay we show that conditions which block regular infection by HMPV particles, including addition of neutralizing antibodies or removal of cell surface heparan sulfate, did not prevent viral spread from infected to new target cells. In contrast, inhibition of actin polymerization or alterations to Rho GTPase signaling pathways significantly decreased cell-to-cell spread. Furthermore, viral proteins and viral RNA were detected in intercellular extensions, suggesting direct transfer of viral genetic material to new target cells. While roles for paramyxovirus matrix and fusion proteins in membrane deformation have been previously demonstrated, we show that the HMPV phosphoprotein extensively co-localized with actin and induced formation of cellular extensions when transiently expressed, supporting a new model in which a paramyxovirus phosphoprotein is a key player in assembly and spread. Our results reveal a novel mechanism for HMPV direct cell-to-cell spread and provide insights into dissemination of respiratory viruses. Human metapneumovirus (HMPV) is an important human respiratory pathogen that affects all age groups worldwide. There are currently no vaccines or treatments available for HMPV, and key aspects of its life cycle remain unknown. We examined the late events of the HMPV infection cycle in human bronchial epithelial cells. Our data demonstrate that HMPV infection leads to formation of unique structures, including intercellular extensions connecting cells, and large networks of branched cell-associated filaments. Viral modulation of the cellular cytoskeleton and cellular signaling pathways are important for formation of these structures. Our results are consistent with the intercellular extensions playing a role in direct spread of virus from cell-to-cell, potentially by transfer of virus genetic material without particle formation. We also show that the HMPV phosphoprotein localizes with actin and can promote membrane deformations, suggesting a novel role in viral assembly or spread for paramyxovirus phosphoproteins.
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Affiliation(s)
- Farah El Najjar
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, Kentucky, United States of America
| | - Nicolás Cifuentes-Muñoz
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, Kentucky, United States of America
| | - Jing Chen
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, Kentucky, United States of America
| | - Haining Zhu
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, Kentucky, United States of America
| | - Ursula J. Buchholz
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, Maryland, United States of America
| | - Carole L. Moncman
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, Kentucky, United States of America
| | - Rebecca Ellis Dutch
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, Kentucky, United States of America
- * E-mail:
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22
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Sayed M, Krishnamurthy B, Pal H. Unraveling multiple binding modes of acridine orange to DNA using a multispectroscopic approach. Phys Chem Chem Phys 2016; 18:24642-53. [PMID: 27545984 DOI: 10.1039/c6cp03716j] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The interaction of acridine orange (AOH(+)) with calf thymus DNA (ct-DNA) under different dye-DNA conditions has been investigated in detail using multispectroscopic techniques, unraveling a number of hitherto unexplored intricacies of dye-DNA binding. The observed results intriguingly show contrasting binding features when low (2.4 μM) and significantly high (23 μM) dye concentrations are used. It is conclusively inferred from absorption, steady-state fluorescence, circular dichroism, fluorescence decay and anisotropy decay studies that at low [DNA] to [dye] ratio, especially with higher dye concentration, dimeric AOH(+) predominantly binds externally to DNA surfaces through electrostatic interactions. At sufficiently high [DNA] to [dye] ratios, however, the interaction intriguingly changes to monomeric AOH(+) bound to DNA, predominantly in the intercalative mode between DNA base pairs, with partly an electrostatic binding on DNA surfaces. With very low initial dye concentration, monomeric (AOH(+)) mostly binds to DNA through intercalative and electrostatic modes for most DNA to dye ratios. The present study demonstrates a systematic correlation of the striking changes in the photophysical properties of the dye upon multimode binding with DNA. The observed results are of great significance in understanding the fundamental insights of dye/drug binding to DNA hosts, of use in the design of effective therapeutic agents.
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Affiliation(s)
- Mhejabeen Sayed
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India.
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23
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Sayed M, Shinde K, Shah R, Pal H. pH-Responsive Indicator Displacement Assay of Acetylcholine Based on Acridine-p-Sulfonatocalix[4]arene Supramolecular System: Fluorescence Off/On Switching and Reversible pKaShift. ChemistrySelect 2016. [DOI: 10.1002/slct.201600226] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Mhejabeen Sayed
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
| | - Ketaki Shinde
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
| | - Ramesh Shah
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
| | - Haridas Pal
- Radiation & Photochemistry Division; Bhabha Atomic Research Centre; Mumbai 400 085 India
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24
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Sadhu B, Sundararajan M, Bandyopadhyay T. Efficient Separation of Europium Over Americium Using Cucurbit-[5]-uril Supramolecule: A Relativistic DFT Based Investigation. Inorg Chem 2016; 55:598-609. [DOI: 10.1021/acs.inorgchem.5b01627] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Biswajit Sadhu
- Radiation Safety Systems Division and ‡Theoretical Chemistry Section, Bhabha Atomic Research Centre, Mumbai−400 085, India
| | - Mahesh Sundararajan
- Radiation Safety Systems Division and ‡Theoretical Chemistry Section, Bhabha Atomic Research Centre, Mumbai−400 085, India
| | - Tusar Bandyopadhyay
- Radiation Safety Systems Division and ‡Theoretical Chemistry Section, Bhabha Atomic Research Centre, Mumbai−400 085, India
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25
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Sayed M, Sundararajan M, Mohanty J, Bhasikuttan AC, Pal H. Photophysical and Quantum Chemical Studies on the Interactions of Oxazine-1 Dye with Cucurbituril Macrocycles. J Phys Chem B 2015; 119:3046-57. [DOI: 10.1021/jp509243j] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Mhejabeen Sayed
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Mahesh Sundararajan
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Jyotirmayee Mohanty
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Achikanath C. Bhasikuttan
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Haridas Pal
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
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26
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Antony J, Sure R, Grimme S. Using dispersion-corrected density functional theory to understand supramolecular binding thermodynamics. Chem Commun (Camb) 2015; 51:1764-74. [DOI: 10.1039/c4cc06722c] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A recently published theoretical approach employing a nondynamic structure model using dispersion-corrected density functional theory (DFT-D3) to calculate equilibrium free energies of association (Chem. – Eur. J., 2012, 18, 9955–9964) is illustrated by its application to eight supramolecular complexes.
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Affiliation(s)
- Jens Antony
- Mulliken Center for Theoretical Chemistry
- Institut für Physikalische und Theoretische Chemie der Universität Bonn
- D-53115 Bonn
- Germany
| | - Rebecca Sure
- Mulliken Center for Theoretical Chemistry
- Institut für Physikalische und Theoretische Chemie der Universität Bonn
- D-53115 Bonn
- Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry
- Institut für Physikalische und Theoretische Chemie der Universität Bonn
- D-53115 Bonn
- Germany
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27
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Sayed M, Pal H. pH-Assisted control over the binding and relocation of an acridine guest between a macrocyclic nanocarrier and natural DNA. Phys Chem Chem Phys 2015; 17:9519-32. [DOI: 10.1039/c4cp05335d] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Controlled binding and relocation of a dye–drug between a macrocyclic nanocarrier and natural DNA is demonstrated using pH as a stimulus.
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Affiliation(s)
- Mhejabeen Sayed
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
| | - Haridas Pal
- Radiation & Photochemistry Division
- Bhabha Atomic Research Centre
- Mumbai 400 085
- India
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28
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Detailed Scenario of the Acid–Base Behavior of Prototropic Molecules in the Subdomain-IIA Pocket of Serum Albumin: Results and Prospects in Drug Delivery. J Phys Chem B 2014; 118:12153-67. [DOI: 10.1021/jp5076466] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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29
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Barooah N, Sundararajan M, Mohanty J, Bhasikuttan AC. Synergistic Effect of Intramolecular Charge Transfer toward Supramolecular pKa Shift in Cucurbit[7]uril Encapsulated Coumarin Dyes. J Phys Chem B 2014; 118:7136-46. [DOI: 10.1021/jp501824p] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Nilotpal Barooah
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Mahesh Sundararajan
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Jyotirmayee Mohanty
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Achikanath C. Bhasikuttan
- Radiation & Photochemistry Division and ‡Theoretical Chemistry Section, Chemistry Group, Bhabha Atomic Research Centre, Mumbai 400 085, India
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30
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Datta S, Halder M. Effect of encapsulation in the anion receptor pocket of sub-domain IIA of human serum albumin on the modulation of pKa of warfarin and structurally similar acidic guests: A possible implication on biological activity. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 130:76-85. [DOI: 10.1016/j.jphotobiol.2013.10.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 10/03/2013] [Accepted: 10/19/2013] [Indexed: 01/01/2023]
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31
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Das R, Duportail G, Ghose A, Richert L, Klymchenko A, Chakraborty S, Yesylevskyy S, Mely Y. Tuning excited-state proton transfer dynamics of a 3-hydroxychromone dye in supramolecular complexes via host–guest steric compatibility. Phys Chem Chem Phys 2014; 16:776-84. [DOI: 10.1039/c3cp52597j] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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Sundararajan M. Quantum Chemical Challenges for the Binding of Simple Alkanes to Supramolecular Hosts. J Phys Chem B 2013; 117:13409-17. [DOI: 10.1021/jp405113j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Mahesh Sundararajan
- Theoretical Chemistry Section, Bhabha Atomic Research Centre, Mumbai 400 085, India
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33
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Gavvala K, Sengupta A, Koninti RK, Hazra P. Supramolecular Host‐Inhibited Excited‐State Proton Transfer and Fluorescence Switching of the Anti‐Cancer Drug, Topotecan. Chemphyschem 2013; 14:3375-83. [DOI: 10.1002/cphc.201300461] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 06/19/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Krishna Gavvala
- Department of Chemistry, Mendeleev Block, Indian Institute of Science Education and Research, Pune 411008, Maharashtra (India), Fax: (+91) 20‐25899790
| | - Abhigyan Sengupta
- Department of Chemistry, Mendeleev Block, Indian Institute of Science Education and Research, Pune 411008, Maharashtra (India), Fax: (+91) 20‐25899790
| | - Raj Kumar Koninti
- Department of Chemistry, Mendeleev Block, Indian Institute of Science Education and Research, Pune 411008, Maharashtra (India), Fax: (+91) 20‐25899790
| | - Partha Hazra
- Department of Chemistry, Mendeleev Block, Indian Institute of Science Education and Research, Pune 411008, Maharashtra (India), Fax: (+91) 20‐25899790
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34
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Khorwal V, Sadhu B, Dey A, Sundararajan M, Datta A. Modulation of Protonation–Deprotonation Processes of 2-(4′-Pyridyl)benzimidazole in Its Inclusion Complexes with Cyclodextrins. J Phys Chem B 2013; 117:8603-10. [DOI: 10.1021/jp403476n] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Vijaykant Khorwal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
| | | | - Arghya Dey
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
| | | | - Anindya Datta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
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35
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Supramolecular host–guest interaction of acridine dye with cyclodextrin macrocycles: Photophysical, pKa shift and quenching study. J Photochem Photobiol A Chem 2013. [DOI: 10.1016/j.jphotochem.2013.02.017] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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36
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Gavvala K, Sengupta A, Hazra P. Modulation of Photophysics and pKaShift of the Anti-cancer Drug Camptothecin in the Nanocavities of Supramolecular Hosts. Chemphyschem 2013; 14:532-42. [DOI: 10.1002/cphc.201200879] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Revised: 11/29/2012] [Indexed: 01/26/2023]
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