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Nayak P, Bag J, Padhan SK, Sahoo H, Sahu SN, Mishra M. Coumarin-Based Noncytotoxicity Fluorescent Dye for Tracking Actin Protein in In-Vivo Imaging. Chem Res Toxicol 2023. [PMID: 37261822 DOI: 10.1021/acs.chemrestox.3c00051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Drosophila shares maximum homology with the human disease-causing genes and thus has been employed to evaluate the toxicity of numerous compounds. Further, its distinguishable developmental stages, easy rearing, and short lifespan make it a perfect model organism to study toxicological properties of any new compound. The current study evaluates the toxic effect of a coumarin-based organic fluorescent dye, 7-hydroxy-4-methyl-8-((4-(2-oxo-2H-chromen-3-yl)thiazol-2-ylimino)methyl)-2H-chromen-2-one (CTC), using Drosophila melanogaster as a model organism by studying different behavioral, screening, and staining techniques using Oregon-R flies. For toxicity assessment, one control fly group was compared with various flies that had been subjected to fed CTC dye orally of different concentrations (0.5, 1, 2.5, and 5 μg/mL). The 3rd instar larvae were checked for the larvae crawling assay. The crawling assay demonstrates that the speed and path of the treated larvae are almost equal to the control ones, which signifies the non-neurotoxic property of CTC. Trypan blue assay further suggested that the dye does not cause any major damage to the gut. Phalloidin staining revealed that the actin composition remains unaltered even after the CTC treatment, while the DAPI staining experiment indicates that CTC does not cause any nuclear damage to fly gut cells. However, at a concentration of 5 μg/mL, CTC causes developmental delay. The flies hatched after larval treatment of CTC do not show any structural defects, suggesting clearly that CTC is also nongenotoxic to Drosophila. The current studies propose CTC as a noncytotoxic and nongenotoxic dye to track actin protein in the model organism D. melanogaster.
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Affiliation(s)
- Pratuysha Nayak
- Neural Developmental Biology Lab, Department of Life Sciences, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Janmejaya Bag
- Neural Developmental Biology Lab, Department of Life Sciences, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Subrata Kumar Padhan
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla, Sambalpur 768019, Odisha, India
| | - Harekrushna Sahoo
- Biophysical and Protein Chemistry Lab, Department of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Satya Narayan Sahu
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla, Sambalpur 768019, Odisha, India
| | - Monalisa Mishra
- Neural Developmental Biology Lab, Department of Life Sciences, National Institute of Technology, Rourkela 769008, Odisha, India
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Padhan SK, Bag J, Panda M, Biswal BK, Sahoo H, Mishra M, Sahu SN. Synthesis of First Coumarin Fluorescent Dye for Actin Visualization. Bioconjug Chem 2022; 33:2113-2120. [PMID: 36264777 DOI: 10.1021/acs.bioconjchem.2c00332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Selective fluorescence imaging of actin protein hugely depends on the fluorescently labeled actin-binding domain (ABD). Thus, it is always a challenging task to image the actin protein (in vivo or in vitro) directly with an ABD-free system. To overcome the limitations of actin imaging without an ABD, we have designed a facile and cost-effective red fluorescent coumarin dye 7-hydroxy-4-methyl-8-(4-(2-oxo-2H-chromen-3-yl)thiazol-2-ylimino)methyl-2H-chromen-2-one (CTC) for actin binding. The selective binding of the dye was investigated using the gut and eye of the model organism Drosophila melanogaster and C2C12 and SCC-9 cell lines. Our result suggests two major advantages of CTC over the dyes presently used for imaging actin proteins. First, the dye can bind to actin efficiently without any secondary intermediate. Second, it is much more stable at room temperature and exhibits excellent photostability. To the best of our knowledge, this is the first fluorescent dye that can bind to the actin protein without employing any secondary intermediate/actin-binding domain. These findings could pave the way for many biologists and physicists to successfully employ the CTC dye for imaging and tracking actin proteins by fluorescence microscopy in various in vivo and in vitro systems.
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Affiliation(s)
- Subrata Kumar Padhan
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla, Sambalpur 768019, Odisha, India
| | - Janmejaya Bag
- Neural Developmental Biology Lab, Department of Life Science, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Munmun Panda
- Cancer Drug Resistance Lab, Department of Life Science, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Bijesh Kumar Biswal
- Cancer Drug Resistance Lab, Department of Life Science, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Harekrushna Sahoo
- Biophysical and Protein Chemistry Lab, Department of Chemistry, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Monalisa Mishra
- Neural Developmental Biology Lab, Department of Life Science, National Institute of Technology, Rourkela 769008, Odisha, India
| | - Satya Narayan Sahu
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla, Sambalpur 768019, Odisha, India
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Sahu SN, Satpathy SS, Pattnaik S, Mohanty C, Pattanayak SK. Boerhavia diffusa plant extract can be a new potent therapeutics against mutant nephrin protein responsible for type1 nephrotic syndrome: Insight into hydrate-ligand docking interactions and molecular dynamics simulation study. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Swami S, Sahu SN, Shrivastava R. Nanomaterial catalyzed green synthesis of tetrazoles and its derivatives: a review on recent advancements. RSC Adv 2021; 11:39058-39086. [PMID: 35492456 PMCID: PMC9044536 DOI: 10.1039/d1ra05955f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 11/11/2021] [Indexed: 12/25/2022] Open
Abstract
Tetrazoles are indispensable nitrogen containing heterocyclic scaffolds that offer a broad spectrum of applications in various domains such as medicinal chemistry, high energy material science, biochemistry, pharmacology etc. Owing to their useful applications, a wide range of catalysts have been explored for green synthesis of tetrazole derivatives. In recent times, nanomaterials have been emerged as extremely efficient catalysts for different organic transformations because of their high surface area-to-volume ratio, easy surface modification, simple fabrications, easy recovery and reusability. In this article, we have presented an overview of utilization of various nano-catalysts, nanocomposites and other solid-supported nanomaterials as an efficient environmental benign catalytic system for green synthesis of tetrazoles and derivatives. This review will provide an exclusive emphasis on boehmite, magnetic, copper, carbon, MCM-41, and composite based nanomaterials that have been developed since the year 2010 for the synthesis of tetrazole derivatives. In addition, we have briefly discussed the fabrication, functionalization and characterization of some novel nanomaterials and their advantages in the synthesis of tetrazole and its derivatives along with the reaction mechanism that involves synthesis of tetrazole derivatives via nanomaterials catalysed reactions.
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Affiliation(s)
- Suman Swami
- Department of Chemistry, Manipal University Jaipur VPO-Dehmi-Kalan, Off Jaipur-Ajmer Express Way Jaipur Rajasthan India-303007
| | - Satya Narayan Sahu
- School of Chemistry, Sambalpur University Jyoti Vihar, Burla Sambalpur Orissa India-768019
| | - Rahul Shrivastava
- Department of Chemistry, Manipal University Jaipur VPO-Dehmi-Kalan, Off Jaipur-Ajmer Express Way Jaipur Rajasthan India-303007
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Dwivedi GR, Rai R, Pratap R, Singh K, Pati S, Sahu SN, Kant R, Darokar MP, Yadav DK. Drug resistance reversal potential of multifunctional thieno[3,2-c]pyran via potentiation of antibiotics in MDR P. aeruginosa. Biomed Pharmacother 2021; 142:112084. [PMID: 34449308 DOI: 10.1016/j.biopha.2021.112084] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Accepted: 08/17/2021] [Indexed: 10/20/2022] Open
Abstract
We explored the antibacterial potential (alone and combination) against multidrug resistant (MDR) Pseudomonas aeruginosa isolates KG-P2 using synthesized thieno[3,2-c]pyran-2-ones in combination with different antibiotics. Out of 14 compounds, two compounds (3g and 3l) abridged the MIC of tetracycline (TET) by 16 folds. Compounds was killing the KG-P2 cells, in time dependent manner, lengthened post-antibiotic effect (PAE) of TET and found decreased the mutant prevention concentration (MPC) of TET. In ethidium bromide efflux experiment, two compounds repressed the drug transporter (efflux pumps) which is further supported by molecular docking of these compounds with efflux complex MexAB-OprM. In another study, these compounds inhibited the synthesis of biofilm.
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Affiliation(s)
- Gaurav Raj Dwivedi
- Microbiology Department, ICMR-Regional Medical Research Centre, BRD Medical College Campus, Gorakhpur 273013, India.
| | - Reeta Rai
- Department of Biochemistry, AIIMS Ansari Nagar, New Delhi 110029, India
| | - Ramendra Pratap
- Department of Chemistry, North campus University of Delhi, Delhi 110007, India.
| | - Khusbu Singh
- Microbiology Department, ICMR-Regional Medical Research Centre, Bhubaneshwar 751023, Odisha, India
| | - Sanghamitra Pati
- Microbiology Department, ICMR-Regional Medical Research Centre, Bhubaneshwar 751023, Odisha, India
| | - Satya Narayan Sahu
- Government College Balrampur, Balrampur-Ramanujganj, Chhattisgarh 497119, India
| | - Rajni Kant
- Microbiology Department, ICMR-Regional Medical Research Centre, BRD Medical College Campus, Gorakhpur 273013, India
| | - Mahendra P Darokar
- Biotechnology Division, CSIR-Central Institute of Medicinal and Aromatic Plants, ̥Near Kukrail Picnic Spot, P.O. CIMAP, Lucknow 226015, India
| | - Dharmendra K Yadav
- Gachon Institute of Pharmaceutical Science and Department of Pharmacy, College of Pharmacy, Gachon University, 191 Hambakmoeiro, Yeonsu-gu, Incheon 21924, Republic of Korea.
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Sahu SN, Satpathy SS, Mohanty C, Pattanayak SK. Computational study to evaluate the potency of phytochemicals in Boerhavia diffusa and the impact of point mutation on cyclin-dependent kinase 2-associated protein 1. J Biomol Struct Dyn 2021; 40:8587-8601. [PMID: 33876720 DOI: 10.1080/07391102.2021.1914169] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
A protein's function is closely related to its structural properties. Mutations can affect the functionality of a protein. Different cancer tissues have found disordered expression of the cyclin-dependent kinase 2-associated Protein 1 (CDK2AP1) gene. A protein molecule's conformational flexibility affects its interaction with phytochemicals and their biological partners at various levels. Boerhavia diffusa has been investigated most extensively for its medicinal activities like anticancer properties. It contains many bioactive compounds like Boeravinone A, Boeravinone B, Boeravinone C, Boeravinone D, Boeravinone E, Boeravinone F, Boeravinone G, Boeravinone H, Boeravinone I and Boeravinone J. We have studied to analyse the binding efficacy properties as well as essential dynamic behaviour, free energy landscape of both the native and mutant protein CDK2AP1 with bioactive compounds from Boerhavia diffusa plant extracts through computational approaches by homology modelling, docking and molecular dynamics simulation. From the molecular docking study, we found that. Boeravinone J have best binding affinity (-7.9 kcal/mol) towards the native protein of CDKAP1 compared to others phytochemicals. However, we found the binding energy for H23R and C105R (mutation point) -7.8 and -7.6 kcal/mol, respectively. A single minima energy point (from 100 ns molecular dynamics simulation study) was found in the H23R mutant with Boeravinone J complex suggested that minimum structural changes with less conformational mobility compared C105A mutant model.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Satya Narayan Sahu
- School of Applied Sciences, Kalinga Institute of Industrial Technology (KIIT) Deemed to be University, Bhubaneswar, India
| | - Sneha Shriparna Satpathy
- School of Applied Sciences, Kalinga Institute of Industrial Technology (KIIT) Deemed to be University, Bhubaneswar, India
| | - Chandana Mohanty
- School of Applied Sciences, Kalinga Institute of Industrial Technology (KIIT) Deemed to be University, Bhubaneswar, India
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Sahu SN, Mishra B, Sahu R, Pattanayak SK. Molecular dynamics simulation perception study of the binding affinity performance for main protease of SARS-CoV-2. J Biomol Struct Dyn 2020; 40:2444-2459. [PMID: 33228481 PMCID: PMC7754937 DOI: 10.1080/07391102.2020.1850362] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Like common cold and flu, SARC-CoV-2 virus spreads by droplets of sneezes or coughs which virus affects people of various age groups. Today, this virus is almost distributed all over the world. Since binding process plays a crucial role between host and receptor, therefore, we studied the molecules intended toward inhibition process through molecular docking and molecular dynamics simulation process. From the molecular docking study, it is noteworthy that remdesivir shows better binding affinity toward the main protease of SARS-CoV2 compared to other studied drugs. Within studied phytochemicals, carnosic acid shows better binding poses toward main protease of SARS-CoV2 among studied phytochemicals. The amino acid residues GLN110 and PHE294 were almost found in all the studied interactions of drugs and phytochemicals with main protease of SARS-CoV-2. Furthermore, the results show a larger contribution of the Van der Waals energies as compared to others like electrostatic energies suggesting that ligands at the binding pocket are predominantly stabilized by hydrophobic interactions. The conformational change during ligand binding was predicted from Gibbs free energy landscape analysis through molecular dynamics simulation. We observed that, there were two main free energy basins for both docked carnosic acid complex and for docked remdesivir complex, only one main free energy basin was found in the global free energy minimum region. Communicated by Ramaswamy H. Sarma
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Affiliation(s)
- Satya Narayan Sahu
- School of Applied Sciences, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar, India
| | - Biswajit Mishra
- School of Applied Sciences, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar, India
| | - Rojalin Sahu
- School of Applied Sciences, Kalinga Institute of Industrial Technology (KIIT), Deemed to be University, Bhubaneswar, India
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Panda J, Sahu SN, Pati R, Panda PK, Tripathy BC, Pattanayak SK, Sahu R. Role of Pore Volume and Surface Area of Cu‐BTC and MIL‐100 (Fe) Metal‐Organic Frameworks on the Loading of Rifampicin: Collective Experimental and Docking Study. ChemistrySelect 2020. [DOI: 10.1002/slct.202000728] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Jagannath Panda
- School of Applied Sciences Kalinga Institute of Industrial Technology (KIIT) Deemed to be University Bhubaneswar 751024 India
- Institute of Minerals and Material Technology (CSIR-IMMT) Bhubaneswar 751013 India
| | - Satya Narayan Sahu
- School of Applied Sciences Kalinga Institute of Industrial Technology (KIIT) Deemed to be University Bhubaneswar 751024 India
| | | | - Prasanna Kumar Panda
- Institute of Minerals and Material Technology (CSIR-IMMT) Bhubaneswar 751013 India
| | | | | | - Rojalin Sahu
- School of Applied Sciences Kalinga Institute of Industrial Technology (KIIT) Deemed to be University Bhubaneswar 751024 India
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Rana P, Murmu N, Padhan SK, Sahu SN. Butterfly pea (Clitoria ternatea) extract as a green analytical tool for selective colorimetric detection of bisulphate (HSO 4-) ion in aqueous medium. Spectrochim Acta A Mol Biomol Spectrosc 2020; 237:118376. [PMID: 32334326 DOI: 10.1016/j.saa.2020.118376] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 04/05/2020] [Accepted: 04/14/2020] [Indexed: 06/11/2023]
Abstract
The blue color of butterfly pea (Clitoria ternatea) was extracted by Milli-Q water and evaluated for selective detection of bisulphate (HSO4-) ions. The stability of the Clitoria ternatea extract was established by UV-visible and fluorescence techniques. The blue water extract from Clitoria ternatea selectively recognizes HSO4- ions over various anions via a distinct visual color change from blue to purple with a significant hypsochromic shift of 68 nm in the UV-visible absorption spectra. Thus Clitoria ternatea extract provides a selective real time colorimetric monitoring of HSO4- ions which would pave the way for the development of low cost green analytical tool. This type of detection technique enhances the environmental and economic benefits and can emerge as an alternative form of synthetic chelating sensors.
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Affiliation(s)
- Punam Rana
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla 768 019, Odisha, India
| | - Narayan Murmu
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla 768 019, Odisha, India
| | - Subrata Kumar Padhan
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla 768 019, Odisha, India
| | - Satya Narayan Sahu
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla 768 019, Odisha, India.
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Rana P, Panda L, Murmu N, Bag BP, Sahu SN. Fluorometric sensing of hydroxylamine in an aqueous medium utilizing a diphenyl imidazole-based probe. Org Biomol Chem 2020; 18:5963-5971. [PMID: 32697244 DOI: 10.1039/d0ob00608d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The detection of hydroxylamine in an aqueous medium is challenging due to its very similar chemical reactivity to its nearest competitors such as hydrazine hydrate and primary amines. Moreover, the detection of hydroxylamine at neutral pH adds further complexity to the sensing phenomenon due to its poor reactivity in a neutral aqueous medium. In this work, we have presented a diphenyl imidazole benzaldehyde (DIB) probe which demonstrates the detection of hydroxylamine (HA) in micromolar concentrations with high selectivity in 5% DMSO phosphate buffer solution at pH 7.4 via a fluorescence "turn-on" signal. The interaction of hydroxylamine with the probe has been comprehensively studied by using fluorescence spectroscopy, proton NMR, FTIR, ESI-mass spectrometry and DLS measurements. The experimental results were further corroborated with the DFT studies. These results could pave the way toward the development of molecular indicators for hydroxylamine in chemical and biological platforms.
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Affiliation(s)
- Punam Rana
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla-768 019, Odisha, India.
| | - Lipsarani Panda
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla-768 019, Odisha, India.
| | - Narayan Murmu
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla-768 019, Odisha, India.
| | - Bhawani Prasad Bag
- Department of Biotechnology and Bioinformatics, Sambalpur University, Jyoti Vihar, Burla-768 019, Odisha, India
| | - Satya Narayan Sahu
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla-768 019, Odisha, India.
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Padhan SK, Mishra VK, Murmu N, Mishra S, Sahu SN. Through bond energy transfer (TBET)-operated fluoride ion sensing via spirolactam ring opening of a coumarin–fluorescein bichromophoric dyad. RSC Adv 2020; 10:28422-28430. [PMID: 35519090 PMCID: PMC9055680 DOI: 10.1039/d0ra05357k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 07/24/2020] [Indexed: 11/27/2022] Open
Abstract
The detection of fluoride ions in a competitive environment often poses several challenges. In this work, we have designed and synthesized a coumarin functionalized fluorescein dyad (R3) which represents an ideal through bond energy transfer (TBET) fluorophore with the coumarin unit as donor and fluorescein unit as acceptor. The bichromophoric dyad demonstrates the detection of fluoride ions in the parts per billion (ppb) concentration level (22.8 ppb) with high selectivity via a TBET emission signal at 548 nm with a diagnostic bright yellow colour fluorescence output. Based on UV-visible, fluorescence, 1H NMR and DFT studies, it is shown that the fluoride ion induces the opening of the spirolactam ring of the fluorescein moiety and provides a π-conjugation link between the donor and acceptor units enabling a TBET phenomenon with a larger pseudo-Stokes shift of 172 nm. To the best of our knowledge, this is the first report where the fluoride ion is detected via a TBET signal between the coumarin and fluorescein units in a bichromophoric dyad. A coumarin–fluorescein based bichromophoric dyad detects fluoride ions in parts per billion concentration level via a TBET emission signal at 548 nm with a diagnostic bright yellow fluorescence.![]()
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Affiliation(s)
| | - Vipin Kumar Mishra
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur – 721302
- India
| | - Narayan Murmu
- School of Chemistry
- Sambalpur University
- Burla-768 019
- India
| | - Sabyashachi Mishra
- Department of Chemistry
- Indian Institute of Technology
- Kharagpur – 721302
- India
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Sahu SN, Moharana M, Sahu R, Pattanayak SK. Impact of mutation on podocin protein involved in type 2 nephrotic syndrome: Insights into docking and molecular dynamics simulation study. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.02.120] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Panda J, Sahoo JK, Panda PK, Sahu SN, Samal M, Pattanayak SK, Sahu R. Adsorptive behavior of zeolitic imidazolate framework-8 towards anionic dye in aqueous media: Combined experimental and molecular docking study. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.01.033] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Padhan SK, Palei J, Rana P, Murmu N, Sahu SN. Sequential displacement strategy for selective and highly sensitive detection of Zn 2+, Hg 2+ and S 2- ions: An approach toward a molecular keypad lock. Spectrochim Acta A Mol Biomol Spectrosc 2019; 208:271-284. [PMID: 30340207 DOI: 10.1016/j.saa.2018.10.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 10/07/2018] [Accepted: 10/11/2018] [Indexed: 05/14/2023]
Abstract
A thiocarbonohydrazone locked salicylidene based macrocycle ligand L has been synthesized and its ion sensing properties were examined by UV-visible and fluorescence spectroscopy. The macrocycle serves as a highly selective colorimetric sensor for Hg2+ ions while it acts as an excellent fluorescent sensor for Zn2+ ions by exhibiting a green fluorescence at 498 nm even in the presence of interfering ions. A detailed analysis of binding characteristics such as complex stoichiometry, association constant and detection limits of L toward Hg2+ and Zn2+ ions were evaluated by UV-visible and fluorescence experiments which revealed a stronger binding affinity and higher detection limit of L toward the mercury ions. Further, the sequential displacement strategy for the chromofluorogenic detection of Zn2+, Hg2+ and S2- ions by ligand L, has been studied comprehensively. Finally, the ion-responsive fluorescence output signal of L were employed to design a molecular keypad lock which could be accessible by two users having two different set of chemical passwords (inputs) through distinguishable optical trajectories.
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Affiliation(s)
- Subrata Kumar Padhan
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla 768 019, Odisha, India
| | - Jitendra Palei
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla 768 019, Odisha, India
| | - Punam Rana
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla 768 019, Odisha, India
| | - Narayan Murmu
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla 768 019, Odisha, India
| | - Satya Narayan Sahu
- School of Chemistry, Sambalpur University, Jyoti Vihar, Burla 768 019, Odisha, India.
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Barla LS, Pattnaik GP, Meher G, Padhan SK, Sahu SN, Chakraborty H. Fluorescence-based ion sensing in lipid membranes: a simple method of sensing in aqueous medium with enhanced efficiency. RSC Adv 2019; 9:31030-31034. [PMID: 35529354 PMCID: PMC9072528 DOI: 10.1039/c9ra05663g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 09/19/2019] [Indexed: 11/21/2022] Open
Abstract
Detection of ions in chemical, biological and environmental samples has gathered tremendous momentum considering the beneficial as well as adverse effects of the ions. Generally, most of the ions are beneficial up to an optimum concentration, beyond which they are toxic to human health. However, most of the fluorescence-based ion sensors are only active in non-aqueous solution because of the low solubility of the sensor molecules in aqueous buffer medium. In the present work, we have demonstrated that encapsulation of an aqueous insoluble thiocarbonohydrazone-locked salicylidene-based macrocyclic ligand in 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) membranes allows the selective detection of Zn2+ in aqueous medium with approximately 3-fold enhanced efficiency compared to its efficiency in DMSO medium. We have further modulated the charge of the membrane surface by adding various concentrations of a negatively charged lipid, 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoglycerol (POPG), and showed that negative surface charge further enhances the Zn2+ sensing efficiency up to approximately 6-fold. This strategy opens up a new avenue of utilizing organic sensors to detect vital ions in aqueous medium. Our strategy provides an opportunity to tune the hydrophobic molecular sensors to sense ions in aqueous solutions with enhanced efficiency by incorporating them in lipid membranes.![]()
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Yadav P, Shaw R, Panwar R, Sahu SN, Kumar A, Pratap R. A Base-Mediated 6-exo
-trig versus 6-exo
-dig Carbocyclization Strategy for the Synthesis of Functionalized Biaryl Compounds. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700319] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Pratik Yadav
- Department of Chemistry; University of Delhi, North Campus; Delhi 110007 India
| | - Ranjay Shaw
- Department of Chemistry; University of Delhi, North Campus; Delhi 110007 India
| | - Rahul Panwar
- Department of Chemistry; University of Delhi, North Campus; Delhi 110007 India
| | - Satya Narayan Sahu
- Department of Chemistry; University of Delhi, North Campus; Delhi 110007 India
| | - Abhinav Kumar
- Department of Chemistry; University of Lucknow; Lucknow Uttar Pradesh 226009 India
| | - Ramendra Pratap
- Department of Chemistry; University of Delhi, North Campus; Delhi 110007 India
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18
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Abstract
Both one pot and step wise synthesis of methyl 3,5-diaminothieno[3,2-c]pyridin-4-one-2-carboxylates6have been delineated by the reaction of 6-aryl-4-methylthio-2H-pyran-2-one-3-carbonitriles3, methyl mercaptoacetate and hydrazine hydrate.
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Affiliation(s)
| | - Surjeet Singh
- Department of Chemistry
- University of Delhi
- Delhi
- India-110007
| | - Ranjay Shaw
- Department of Chemistry
- University of Delhi
- Delhi
- India-110007
| | - Shally Shally
- Department of Chemistry
- University of Delhi
- Delhi
- India-110007
| | - Vishnu Ji Ram
- Department of Chemistry
- University of Lucknow
- Lucknow
- India-226009
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19
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Sahu SN, Padhan SK, Sahu PK. Coumarin functionalized thiocarbonohydrazones as a new class of chromofluorescent receptors for selective detection of fluoride ion. RSC Adv 2016. [DOI: 10.1039/c6ra19647k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Thiocarbonohydrazone receptors selectively recognize fluoride ionsviaH-bond interactions and subsequent deprotonation to elicit a distinct visual and fluorescence colour change.
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20
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Kejriwal GS, Madhavi CH, Sahu SN. Scimitar syndrome. Bangladesh J Med Sci 2015. [DOI: 10.3329/bjms.v14i1.21576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
A female child of age five attended our institution in Jan 2006 with repeated upper respiratory infection. Plain skiagram and CT examinations confirmed the case to be a Scimitar syndrome. DOI: http://dx.doi.org/10.3329/bjms.v14i1.21576 Bangladesh Journal of Medical Science Vol.14(1) 2015 p.103-105
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21
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Sahu SN, Gupta MK, Singh S, Yadav P, Panwar R, Kumar A, Ram VJ, Kumar B, Pratap R. One pot synthesis of tetrasubstituted thiophenes: [3 + 2] annulation strategy. RSC Adv 2015. [DOI: 10.1039/c5ra01290b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A simple, efficient and economical synthesis of dimethyl 3-amino-5-(2-oxo-2-arylethyl)thiophene-2,4-dicarboxylates has been reported by ring opening of methyl 3-amino-6-aryl-4-oxo-4H-thieno[3,2-c]pyran-2-carboxylates by alkoxide ions.
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Affiliation(s)
| | | | - Surjeet Singh
- Department of Chemistry
- University of Delhi
- North Campus
- Delhi
- India-110007
| | - Pratik Yadav
- Department of Chemistry
- University of Delhi
- North Campus
- Delhi
- India-110007
| | - Rahul Panwar
- Department of Chemistry
- University of Delhi
- North Campus
- Delhi
- India-110007
| | - Abhinav Kumar
- Department of Chemistry
- University of Lucknow
- Lucknow
- India-226007
| | - Vishnu Ji Ram
- Department of Chemistry
- University of Lucknow
- Lucknow
- India-226007
| | - Brijesh Kumar
- Division of SAIF
- Central Drug Research Institute
- Lucknow
- India-226001
| | - Ramendra Pratap
- Department of Chemistry
- University of Delhi
- North Campus
- Delhi
- India-110007
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22
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Singh S, Panwar R, Yadav P, Althagafi I, Sahu SN, Pratap R. Precursor directed regioselective synthesis of partially reduced benzo[e]indene through oxidative cyclization and benzo[h]quinolines. RSC Adv 2015. [DOI: 10.1039/c4ra13612h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Precursor directed synthesis of various benzo[h]quinolines and 4,5-dihydro-1H-benz[e]indene has been reported.
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Affiliation(s)
- Surjeet Singh
- Department of Chemistry
- University of Delhi
- North Campus
- Delhi
- India-110007
| | - Rahul Panwar
- Department of Chemistry
- University of Delhi
- North Campus
- Delhi
- India-110007
| | - Pratik Yadav
- Department of Chemistry
- University of Delhi
- North Campus
- Delhi
- India-110007
| | - Ismail Althagafi
- Chemistry Department
- Faculty of Science
- Umm Al-Qura University
- 21955 Makkah
- Saudi Arabia
| | | | - Ramendra Pratap
- Department of Chemistry
- University of Delhi
- North Campus
- Delhi
- India-110007
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23
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Singh S, Yadav P, Sahu SN, Althagafi I, Kumar A, Kumar B, Ram VJ, Pratap R. Synthesis of 1-amino-2-aroyl/acetylnaphthalenes through a base mediated one pot inter and intramolecular C–C bond formation strategy. Org Biomol Chem 2014; 12:4730-7. [DOI: 10.1039/c4ob00432a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Base mediated synthesis of highly functionalized aroyl/acetylnaphthalenes by the reaction of 2-(1-cyano-2,2-bis(methylthio)vinyl)benzonitrile and aryl methyl ketone or acetone has been reported.
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Affiliation(s)
- Surjeet Singh
- Department of Chemistry
- University of Delhi
- Delhi, India
| | - Pratik Yadav
- Department of Chemistry
- University of Delhi
- Delhi, India
| | | | | | - Abhinav Kumar
- Department of Chemistry
- University of Lucknow
- Lucknow, India
| | - Brijesh Kumar
- Division of SAIF
- Central Drug Research Institute
- Lucknow, India
| | - Vishnu Ji Ram
- Department of Chemistry
- University of Lucknow
- Lucknow, India
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24
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Abstract
A series of thieno[3,2-c]pyrans were designed and synthesized by l-proline catalyzed reaction which exhibits substituent dependent fluorescence.
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Affiliation(s)
| | | | - Thaksen Jadhav
- Department of Chemistry
- Indian Institute of Technology Indore
- , India
| | - Pratik Yadav
- Department of Chemistry
- University of Delhi
- Delhi, India-110007
| | - Surjeet Singh
- Department of Chemistry
- University of Delhi
- Delhi, India-110007
| | - Rajneesh Misra
- Department of Chemistry
- Indian Institute of Technology Indore
- , India
| | - Ramendra Pratap
- Department of Chemistry
- University of Delhi
- Delhi, India-110007
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25
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Yadav P, Singh S, Sahu SN, Hussain F, Pratap R. Microwave assisted base dependent regioselective synthesis of partially reduced chromenes, isochromenes and phenanthrenes. Org Biomol Chem 2014; 12:2228-34. [DOI: 10.1039/c3ob41962b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Kejriwal GS, Madhavi C, Sahu SN. Cystic Meningioma. Bangladesh J Med Sci 2013. [DOI: 10.3329/bjms.v12i1.11542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Meningiomas are most common intracranial extraaxial tumours, but atypical meningeiomas like cystic meningioma are rare. It is about 2 to 4 % in adults and 10 to 19 % in infants. Because of its atypical presentation a case of cystic meningioma is presented. DOI: http://dx.doi.org/10.3329/bjms.v12i1.11542 Bangladesh Journal of Medical Science Vol. 12 No. 01 January13 pp.83-85
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Affiliation(s)
- H. M. Chawla
- a Department of Chemistry , Indian Institute of Technology , Hauz Khas, New Delhi , 110016 , India
| | - Rahul Srivastava
- a Department of Chemistry , Indian Institute of Technology , Hauz Khas, New Delhi , 110016 , India
| | - Satya Narayan Sahu
- a Department of Chemistry , Indian Institute of Technology , Hauz Khas, New Delhi , 110016 , India
| | - Satish Kumar
- a Department of Chemistry , Indian Institute of Technology , Hauz Khas, New Delhi , 110016 , India
| | - Shailesh Upreti
- a Department of Chemistry , Indian Institute of Technology , Hauz Khas, New Delhi , 110016 , India
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Kejriwal GS, Dharma RV, Madhavi CH, Sahu SN. Calculi In A Female Urethral: A Rare Cause of Acute Urinary Retention. Bangladesh J Med Sci 2012. [DOI: 10.3329/bjms.v11i2.8724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Urinary calculi are rarely seen in the urethra and are usually encountered in men with urethral stricture or diverticulum. The case of a 23-year-old woman presented with acute retention of urine associated with recurrent urinary tract infection. Cystoscopy was done and the stone was removed. The patient has been well, with no dysuria, and incontinence for 3-month follow-ups.DOI: http://dx.doi.org/10.3329/bjms.v11i2.8724 Bangladesh Journal of Medical Science Vol. 11 No. 02 April 2012: 137-138
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Chawla HM, Sahu SN, Shrivastava R, Kumar S. Calix[4]arene-based ditopic receptors for simultaneous recognition of fluoride and cobalt(II) ions. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.02.083] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Schröder T, Sahu SN, Anselmetti D, Mattay J. Supramolecular Capsules Derived from Resorcin[4]arenes by H-Bonding and Metal Coordination: Synthesis, Characterization, and Single-Molecule Force Spectroscopy. Isr J Chem 2011. [DOI: 10.1002/ijch.201100056] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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31
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Das SN, Sarangi S, Sahu SN, Pal AK. Metal contacts in nanocrystalline n-type GaN: Schottky diodes. J Nanosci Nanotechnol 2009; 9:2532-2539. [PMID: 19437998 DOI: 10.1166/jnn.2009.211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Contact properties in nanocrystalline n-GaN in thin film form were studied by depositing nanocrystalline films onto aluminium coated fused silica substrates by high pressure sputtering of Si (1 at%) doped GaN target. Schottky diodes were realized with Au, Ni and Pd as top contacts on the nanocrystalline n-GaN films to examine the contact properties of the diodes thus formed. Variation of current-voltage (I-V) and capacitance-voltage (C-V) characteristics of the Schottky diodes were recorded at different temperatures and analyzed in the light of the existing theories.
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Affiliation(s)
- S N Das
- Department of Instrumentation Science, USIC Building, Jadavpur University, Calcutta 700032, India
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32
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Abstract
A series of new calix[4]arene(amidocrown) diquinones (3a–3d) have been synthesized, characterized, and evaluated for cation recognition. It has been observed that 3b interacts with alkali metal ions (Li+, Na+, and K+) and ammonium ions to induce an unprecedented downfield shift in the NH proton resonance, which can be attributed to polarization of the amidocrown ring of the calix[4]arene diquinone receptor. The observation has been confirmed by a significant anodic shift (Li+ > NH4+ > Na+> K+) of the corresponding amidocrown-diquinone redox couple in cyclic and square wave voltammetric experiments. Both NMR and electrochemical studies of the binding characteristics of 3b with alkali metal cations and ammonium ions revealed a 1:1 binding stoichiometry for all and exhibited the highest association constant for lithium ions. This indicated that the receptor 3b selectively binds the lithium ion in preference to other alkali metal cations and ammonium ions.
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Affiliation(s)
- Har Mohindra Chawla
- Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110 016, India
| | - Satya Narayan Sahu
- Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110 016, India
| | - Rahul Shrivastava
- Department of Chemistry, Indian Institute of Technology, Hauz Khas, New Delhi 110 016, India
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33
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Paramanik D, Majumdar S, Sahoo SR, Sahu SN, Varma S. Studies of self-organized nanostructures on InP(111) surfaces after low energy Ar+ ion irradiation. J Nanosci Nanotechnol 2008; 8:4227-4230. [PMID: 19049208 DOI: 10.1166/jnn.2008.an27] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We report formation of self organized InP nano dots using 3 keV Ar+ ion sputtering, at 15 degrees incidence from surface normal, on InP(111) surface. Morphology and optical properties of the sputtered surface, as a function of sputtering time, have been investigated by Scanning Probe Microscopy and Raman Scattering techniques. Uniform patterns of nano dots are observed for different durations of sputtering. The sizes and the heights of these nano dots vary between 10 to 100 nm and 20 to 40 nm, respectively. With increasing of sputtering time, t, the size and height of these nano dots increases up to a certain sputtering time t(c). However beyond t(c), the dots break down into smaller nanostructures, and as a result, the size and height of these nanostructures decrease. The uniformity and regularity of these structures are also lost for sputtering beyond t(c). The crossover behavior is also observed in the rms surface roughness. Raman investigations of InP nano dots reveal optical phonon softening due to phonon confinement in the surface nano dots.
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Affiliation(s)
- D Paramanik
- Institute of Physics, Bhubaneswar 751005, India
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34
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Rath S, Sarangi SN, Sahu SN. XPS studies of DNA-cation-interacted self-assembled HgTe quantum dots formed under electrodeposition and their resultant biomolecular recognition application. Nanotechnology 2008; 19:115606. [PMID: 21730557 DOI: 10.1088/0957-4484/19/11/115606] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
DNA interactions with multivalent cations, leading to wrapping around the cations and thermodynamically stable structure formation, followed by electrodeposition, have yielded a narrow size distributed single-crystalline HgTe-DNA quantum dot (QD) hybrid system. The mechanisms of the DNA interactions resulting in self-assembled HgTe QDs through phosphate-cation linkages and superstructure formation by nitrogen base interactions have been established by their respective binding energy shifts as evidenced from x-ray photoelectron spectroscopic studies. The photoluminescence peak position associated with HgTe QD single stranded DNA is red shifted in the presence of its conjugate and suggests the system as a potential optical probe for biomolecular recognition applications.
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35
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Chawla HM, Shrivastava R, Sahu SN. A new class of functionalized calix[4]arenes as neutral receptors for colorimetric detection of fluoride ions. NEW J CHEM 2008. [DOI: 10.1039/b800502h] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sarangi SN, Goswami K, Sahu SN. Biomolecular recognition in DNA tagged CdSe nanowires. Biosens Bioelectron 2007; 22:3086-91. [PMID: 17296294 DOI: 10.1016/j.bios.2007.01.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2006] [Revised: 12/01/2006] [Accepted: 01/10/2007] [Indexed: 11/23/2022]
Abstract
DNA template driven CdSe nanobeads (NBs) and nanowires (NWs) have been synthesized by an electrodeposition technique. The synthesis protocol has yielded randomly oriented cubic CdSe NBs with mean size approximately 3.0 nm in presence of single stranded DNA, poly G(30). Monocrystalline cubic CdSe NWs of width approximately 4.0 nm with string-like morphology have been achieved when synthesized in presence of both poly G(30) and its conjugate, poly C(30). Optical absorption of CdSe NBs show a blue shift of 0.8 eV and long wavelength tailing where as NWs show steep increase of absorption in shorter wavelength regime accompanied by a further blue shift. DNA tags to the NBs or NWs have been confirmed from Fourier transform infrared spectroscopy measurements. Biomolecular recognition with CdSe NWs have been established by photoluminescence measurements.
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Affiliation(s)
- S N Sarangi
- Institute of Physics, Sachivalaya Marg, Bhubaneswar 751005, India
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39
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Chawla HM, Singh SP, Sahu SN, Upreti S. Shaping the cavity of calixarene architecture for molecular recognition: synthesis and conformational properties of new azocalix[4]arenes. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.05.040] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Abstract
An elevation of the intracellular level of cAMP by 4-(3-butoxy-4-methoxybenzyl)-2-imidazolidinone (R020-1724) during heat treatment (41 degrees C for 10 hours) markedly reduced the survival of murine B-16 melanoma cells in culture; however, heat alone or R020-1724 treatment at 37 degrees C for 10 hours was ineffective. D-alpha-tocopheryl succinate (vitamin E succinate), which did not increase cAMP level, reduced the survival of heated cells to a greater degree than with vitamin E succinate alone. The presence of vitamin E succinate for the entire experimental period (during heat and observation period) was necessary for this effect. R020-1724 in combination with vitamin E succinate was more effective in reducing the survival of heated cells than the individual agents. Although prostaglandin (PG) A2 did not increase cAMP level in melanoma cells, it decreased the survival of heated cells when present during heat treatment. Other forms of PG such as PGE1 and PGF2 alpha were ineffective. The combination of R020-1724 with two non-cAMP stimulating agents, PGA2 and vitamin E succinate, decreased the survival of heated cells by about 94% of control. These results suggest that the heat sensitivity of melanoma cells can be increased by cAMP-dependent and -independent mechanisms.
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Affiliation(s)
- S N Sahu
- University of Colorado Health Sciences Center, Denver 80262
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44
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Abstract
Alpha tocopheryl succinate treatment (6-8 micrograms/ml), which inhibited the growth of murine neuroblastoma (NBP2) cells (46 +/- 3%), reduced basal and prostaglandin (PG)E1- and PGA2-stimulated adenylate cyclase (AC) activity in vitro. It also inhibited sodium fluoride (NaF)- and forskolin-stimulated AC activity, suggesting that the effect of vitamin E succinate on AC activity is mediated via stimulatory GTP-binding protein (Gs) and catalytic subunit. Vitamin E succinate-induced reduction of AC activity is not strictly related to inhibition of cell growth. This is substantiated by the finding that, although retinoic acid and butylated hydroxyanisole reduced the growth by over 50%, they did not inhibit AC activity. On the other hand, 4-(3-butoxy-4-methoxybenzyl)-2-imidazolidinone (R020-1724, 200 micrograms/ml), which inhibited growth (73 +/- 3%) and induced differentiation in NB cells, increased basal and PGE1-stimulated AC activity. Vitamin E succinate treatment also reduced PGE1- and PGA2-AC activity in murine fibroblasts (L-cells) without inhibiting growth.
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Affiliation(s)
- S N Sahu
- Department of Radiology, University of Colorado Health Sciences Center, School of Medicine, Denver 80262
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Sahu SN, Edwards-Prasad J, Prasad KN. Alpha tocopheryl succinate inhibits melanocyte-stimulating hormone (MSH)-sensitive adenylate cyclase activity in melanoma cells. J Cell Physiol 1987; 133:585-9. [PMID: 3693413 DOI: 10.1002/jcp.1041330322] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
D-alpha tocopheryl succinate (vitamin E succinate), which is known to induce differentiation and growth inhibition in murine B-16 melanoma cells, reduced basal and melanocyte-stimulating hormone (MSH)-stimulated adenylate cyclase (AC) activity in vitro. Vitamin E succinate treatment also reduced sodium fluoride- and forskoline-stimulated AC activity of melanoma cells in vitro. Treatment of cells with vitamin E succinate (6 micrograms/ml] for a period of 24 hours was sufficient to reduce MSH-stimulated AC activity. Other forms of vitamin E, such as d1-alpha tocopheryl nicotinate, d1-alpha tocopheryl acetate, and d1-alpha tocopherol, which did not affect growth or morphology of melanoma cells, were relatively less effective in altering basal and MSH-stimulated AC activity. Retinoic acid, which inhibited the growth of B-16 melanoma cells, also reduced basal and MSH-, NaF-, and forskolin-stimulated AC activity in vitro. Prostaglandin A2, which inhibited growth and altered morphology, did not change basal or MSH-stimulated AC activity. These results show that one of the mechanisms of action of vitamin E succinate and retinoic acid on melanoma cells may involve reduction of basal and MSH-sensitive AC activity, and this vitamin effect is not necessarily related to growth inhibition.
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Affiliation(s)
- S N Sahu
- Deparment of Radiology, School of Medicine, University of Colorado Health Sciences Center, Denver 80262
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