1
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Sureshkumar K, Khamrang T, Hemamalini M, Saravanan D, Antony GJM. 10-Bromo- N, N-di-phenyl-anthracen-9-amine. IUCrdata 2024; 9:x240207. [PMID: 38586526 PMCID: PMC10993562 DOI: 10.1107/s2414314624002074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 03/03/2024] [Indexed: 04/09/2024] Open
Abstract
In the title compound, C26H18BrN, the dihedral angles between the anthracene ring system and the phenyl rings are 89.51 (14) and 74.03 (15)°. In the extended structure, a weak C-H⋯Br inter-action occurs, which generates [100] chains, but no significant π-π or C-H⋯π inter-actions are observed.
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Affiliation(s)
- K. Sureshkumar
- Department of Chemistry, National College, Thiruchirappalli, Tamil Nadu, India (Affiliated to Bharathidasan University, Tiruchirappalli)
| | - Themmila Khamrang
- Department of Chemistry, Dhanamanjuri University, Manipur 795 001, India
| | - Madhukar Hemamalini
- Department of Chemistry, Mother Teresa Women’s University, Kodaikanal, Tamil Nadu, India
| | - Dhandayutham Saravanan
- Department of Chemistry, National College, Thiruchirappalli, Tamil Nadu, India (Affiliated to Bharathidasan University, Tiruchirappalli)
| | - G. Jerald Maria Antony
- Department of Chemistry, National College, Thiruchirappalli, Tamil Nadu, India (Affiliated to Bharathidasan University, Tiruchirappalli)
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2
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Sumithaa C, Gajda-Morszewski P, Ishaniya W, Khamrang T, Velusamy M, Bhuvanesh N, Brindell M, Mazuryk O, Ganeshpandian M. Design of an anticancer organoruthenium complex as the guest and polydiacetylene-coated fluorogenic nanocarrier as the host: engineering nanocarrier using ene-yne conjugation for sustained guest release, enhanced anticancer activity and reduced in vivo toxicity. Dalton Trans 2024; 53:966-985. [PMID: 38054338 DOI: 10.1039/d3dt03358a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Despite the enormous efforts made over the past two decades to develop metallodrugs and nanocarriers for metallodrug delivery, there are still few precise strategies that aim to optimize the design of both metallodrugs and metallodrug carriers jointly in a concerted effort. In this work, three half-sandwich ruthenium(II) complexes with pyridylimidazo[1,5-a]pyridine ligand functionalized with polycyclic aromatic moiety (Ru(nap), Ru(ant), Ru(pyr)) are evaluated as possible anticancer candidates and polydiacetylene (PDA)-coated amino-functionalized mesoporous silica nanoparticles (AMSNs) are designed as a functional nanocarrier for drug delivery. Ru(pyr) exhibits higher cytotoxicity in HT-29 colorectal cancer cells compared to other complexes and cis-platin, but it does not exhibit better cellular uptake. Ru(pyr) is found to be preferentially accumulated in plasma, mitochondria, and ER-Golgi membrane. The complex induces cell cycle arrest in the G0/G1 phase, while higher concentrations cause programmed cell death via apoptosis. Ru(pyr) influences cancer cell adhesion property and acts as an antioxidant in HT-29 cells. In order to modulate the anticancer potency of Ru(pyr), AMSNs are used to encapsulate the complex, and then diacetylene self-assembly is allowed to deposit on the surface of the nanoparticles. Subsequently, the nanoparticles undergo topopolymerization, which results in π-conjugated PDA-Ru(pyr)@AMSNs. Owing to the ene-yne polymeric skeleton in the backbone, the non-fluorescent AMSNs turn into red-emissive particles, which are exploited for cell imaging applications. The release profile analysis reveals that such a π-conjugated polymer prevents the premature release of the complex from porous silica nanoparticles with the accelerated release of the complex in an acidic medium compared to physiological conditions. The PDA gatekeepers have also been proven to enhance the cellular internalization of Ru(pyr) with slow continuous release from the nanoformulation. Zebrafish embryo toxicity analysis suggests that the PDA-coated nanocarriers could be suitable candidates for in vivo investigations.
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Affiliation(s)
- Chezhiyan Sumithaa
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603 203, Tamil Nadu, India.
| | - Przemyslaw Gajda-Morszewski
- Faculty of Chemistry, Department of Inorganic Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Cracow, Poland.
- Doctoral School of Exact and Natural Sciences, Jagiellonian University, Łojasiewicza 11, 30-348 Cracow, Poland
| | - Wickneswaran Ishaniya
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603 203, Tamil Nadu, India.
| | - Themmila Khamrang
- Department of Chemistry, Dhanamanjuri University, Manipur 795001, India
| | - Marappan Velusamy
- Department of Chemistry, North Eastern Hill University, Shillong 793022, India
| | - Nattamai Bhuvanesh
- X-ray Diffraction Lab, Department of Chemistry, Texas A&M University, College Station, TX 77842, USA
| | - Malgorzata Brindell
- Faculty of Chemistry, Department of Inorganic Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Cracow, Poland.
| | - Olga Mazuryk
- Faculty of Chemistry, Department of Inorganic Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Cracow, Poland.
| | - Mani Ganeshpandian
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603 203, Tamil Nadu, India.
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3
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Ashokan A, Nehru J, Chakkarapani N, Khamrang T, Kavitha SJ, Rajakannan V, Hemamalini M. 4-Amino-3,5-di-chloro-pyridinium 3-hy-droxy-pico-linate monohydrate. IUCrdata 2023; 8:x230821. [PMID: 37818469 PMCID: PMC10561231 DOI: 10.1107/s2414314623008210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Accepted: 09/19/2023] [Indexed: 10/12/2023] Open
Abstract
In the title hydrated salt, C5H5Cl2N2 +·C6H4NO3 -·H2O, the pyridine N atom of the cation is protonated and an intra-molecular O-H⋯O hydrogen bond is observed in the anion, which generates an S(6) ring. The crystal packing features N-H⋯N, O-H⋯O, N-H⋯O, C-H⋯Cl and C-H⋯O hydrogen bonds, which generate a three-dimensional network.
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Affiliation(s)
- Agalya Ashokan
- Department of Chemistry, Mother Teresa Women’s University, Kodaikanal, Tamil Nadu, India
| | - Jayasudha Nehru
- Department of Chemistry, Mother Teresa Women’s University, Kodaikanal, Tamil Nadu, India
| | - Nandhini Chakkarapani
- Department of Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai-600 025, Tamil Nadu, India
| | - Themmila Khamrang
- Assistant Professor, Department of Chemistry, DM College of Science, Dhanamanjuri University, Imphal, Manipur-795 001, India
| | | | - Venkatachalam Rajakannan
- Department of Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai-600 025, Tamil Nadu, India
| | - Madhukar Hemamalini
- Department of Chemistry, Mother Teresa Women’s University, Kodaikanal, Tamil Nadu, India
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4
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Murugan S, Paul AC, Khamrang T, Kavitha SJ, Rajakannan V, Hemamalini M. (2,4-Di-chloro-benzyl-idene)[2-(1 H-indol-3-yl)eth-yl]amine. IUCrdata 2023; 8:x230780. [PMID: 37818473 PMCID: PMC10561229 DOI: 10.1107/s2414314623007800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Accepted: 09/06/2023] [Indexed: 10/12/2023] Open
Abstract
In the title compound, C17H14Cl2N2, the mol-ecule exists in an E configuration with respect to the C=N bond of the Schiff base fragment. The dihedral angle between the indole ring system and the benzene ring is 80.86 (12)°. In the crystal, mol-ecules are connected by N-H⋯N hydrogen bonds, generating a C(7) chain extending along the a-axis direction. No aromatic π-π stacking occurs but weak C-H⋯π inter-actions are observed.
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Affiliation(s)
- Suganya Murugan
- Department of Chemistry, Government Arts and Science College for Women, Kodaikanal, Tamil Nadu, India
| | - Anaglit Catherine Paul
- Department of Chemistry, Mother Teresa Women’s University, Kodaikanal, Tamil Nadu, India
| | - Themmila Khamrang
- Assistant Professor, Department of Chemistry, DM College of Science, Dhanamanjuri University, Imphal, Manipur-795 001, India
| | | | - Venkatachalam Rajakannan
- Department of Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai-600 025, Tamil Nadu, India
| | - Madhukar Hemamalini
- Department of Chemistry, Mother Teresa Women’s University, Kodaikanal, Tamil Nadu, India
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6
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Srinivasan V, Khamrang T, Ponraj C, Saravanan D, Yamini R, Bera S, Jhonsi MA. Pyrene based Schiff bases: Synthesis, crystal structure, antibacterial and BSA binding studies. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129153] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Pathaw L, Khamrang T, Selvakumaran B, Murali M, Arul Prakash P, Mohamed Jaabir MS, Velusamy M. Synthesis, structure, characterization and biological evaluation of 3‐substituted 1‐pyridin‐2‐ylimidazo[1,5‐
a
]pyridine‐based copper(I)–phosphine complexes for anticancer drug screening. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6025] [Citation(s) in RCA: 3] [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: 12/20/2022]
Affiliation(s)
- Larica Pathaw
- Department of Chemistry North‐Eastern Hill University Shillong India
| | | | - Balasubramaniam Selvakumaran
- Coordination and Bioinorganic Chemistry Research Laboratory, Department of Chemistry National College (Autonomous) Tiruchirappalli India
| | - Mariappan Murali
- Coordination and Bioinorganic Chemistry Research Laboratory, Department of Chemistry National College (Autonomous) Tiruchirappalli India
| | - Pitchan Arul Prakash
- Department of Biotechnology and Microbiology National College (Autonomous) Tiruchirappalli India
| | | | - Marappan Velusamy
- Department of Chemistry North‐Eastern Hill University Shillong India
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8
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Radhakrishnan K, Khamrang T, Sambantham K, Sali VK, Chitgupi U, Lovell JF, Mohammad AA, Venugopal R. Identification of cytotoxic copper(II) complexes with phenanthroline and quinoline, quinoxaline or quinazoline-derived mixed ligands. Polyhedron 2021. [DOI: 10.1016/j.poly.2020.114886] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Gopalakrishnan D, Saravanan S, Merckx R, Madan Kumar A, Khamrang T, Velusamy M, Vasanth K, Sunitha S, Hoogenboom R, Maji S, Ganeshpandian M. N, N-Ru(II)- p-cymene-poly( N-vinylpyrrolidone) surface functionalized gold nanoparticles: from organoruthenium complex to nanomaterial for antiproliferative activity. Dalton Trans 2021; 50:8232-8242. [PMID: 34037018 DOI: 10.1039/d1dt00694k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Organometallic Ru-arene complexes are promising as anticancer agents, but the lack of tumor uptake and poor solubility in the physiological medium impede their development. In order to deal with these challenges, we developed gold nanoparticles coated with Ru(arene)-functionalized PNVP-Py, where PNVP-Py is pyridine end-functionalized poly(N-vinylpyrrolidone). It is demonstrated that these particles exhibit higher anti-proliferative activity than the individual organometallic ruthenium(ii) complex of the type [Ru(η6-p-cymene)(NN)Cl]PF6, where NN is bis(4-methoxyphenylimino)acenaphthene, against colorectal adenocarcinoma cell lines. More specifically, a RuII(η6-p-cymene) complex containing a NN bidentate ligand has been prepared and characterized by spectral studies and X-ray crystallography. To tether the isolated complex onto the surface of the AuNPs, PNVP-Py, which contains a pyridine group at one end to coordinate to the Ru-complex and a suitable functional group at the other end to bind on the surface of the AuNPs, has been prepared and utilized to obtain the macromolecular complex [Ru(η6-p-cymene)(NN)(PNVP-Py)]Cl2. Next, stable Ru(p-cym)(NN)(PNVP-Py)@AuNPs were obtained via a ligand exchange reaction of citrate-stabilized AuNPs with a macromolecular complex by a direct 'grafting to' approach and characterized well. Despite the lower DNA cleavage activity, the nanoconjugate exhibits better cytotoxicity than the individual complex against HT-29 colorectal adenocarcinoma cells on account of its enhanced permeability across the cell membrane. The AO/EB staining assay revealed that the nanoconjugate is able to induce an apoptotic mode of cell death, which was further quantitatively evaluated by Annexin V-FITC/PI double assay. An immunofluorescence assay indicated the higher potency of the nanoconjugate to inhibit cyclin D1 gene expression that is required for cancer cell growth. To the best of our knowledge, this is the first report of the modification of an organometallic Ru(arene) complex into a Ru(arene)metallopolymer-gold nanoconjugate for the development of ruthenium-based nanomedicine for cancer treatment.
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Affiliation(s)
- Durairaj Gopalakrishnan
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Chengalpattu, Chennai, TN, India.
| | - S Saravanan
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Chengalpattu, Chennai, TN, India.
| | - Ronald Merckx
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, Ghent, Belgium
| | - Arumugam Madan Kumar
- Department of Chemistry, Sathyabama Institute of Science and Technology, Chennai - 600119, India
| | - Themmila Khamrang
- Department of Chemistry, C. I. College, Bishnupur 795126, Manipur, India
| | - Marappan Velusamy
- Department of Chemistry, North Eastern Hill University, Shillong 793022, India
| | - K Vasanth
- Division of Molecular Biology, Interdisciplinary Institute of Indian System of Medicine (IIISM), SRM Institute of Science and Technology, Kattankulathur 603203, Chengalpattu, Chennai, TN, India
| | - S Sunitha
- Department of Chemistry, Sathyabama Institute of Science and Technology, Chennai - 600119, India
| | - Richard Hoogenboom
- Supramolecular Chemistry Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, Ghent, Belgium
| | - Samarendra Maji
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Chengalpattu, Chennai, TN, India.
| | - Mani Ganeshpandian
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Chengalpattu, Chennai, TN, India.
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10
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Pathaw L, Maheshwaran D, Nagendraraj T, Khamrang T, Velusamy M, Mayilmurugan R. Tetrahedral copper(I) complexes of novel N,N-bidentate ligands and photophysical properties. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.119999] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Kathiravan A, Khamrang T, Dhenadhayalan N, Lin KC, Ramasubramanian K, Jaccob M, Velusamy M. Internet of Things-Enabled Aggregation-Induced Emission Probe for Cu 2+ Ions: Comprehensive Investigations and Three-Dimensional Printed Portable Device Design. ACS Omega 2020; 5:32761-32768. [PMID: 33376914 PMCID: PMC7759008 DOI: 10.1021/acsomega.0c05262] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 11/30/2020] [Indexed: 05/05/2023]
Abstract
Herein, we have developed a novel aggregation-induced emission (AIE) probe and three-dimensional (3D) printed portable device for copper (Cu2+) sensing in an aqueous medium. A ubiquitous synthetic route has been employed to devise the anthracene-conjugated imidazo[1,5-a]pyridine (TL19) probe as a unique anchor for Cu2+ ions. The TL19 is meticulously characterized through pivotal spectroscopic techniques, and the satisfactory results were obtained. The solvatochromic analysis and density functional theory calculations cohesively reveal that the TL19 exhibits the intramolecular charge transfer transition upon photoexcitation. Intriguingly, the TL19 exhibits spherically shaped nanoaggregates and enhanced fluorescence in DMSO/water (10:90) mixtures. This fluorescent nanoaggregate instantaneously responded toward the detection of Cu2+ via a deaggregation mechanism. The detection limit is found to be 9 pM in an aqueous medium. Further, the detection of Cu2+ in the HeLa cells has also been achieved due to bright green fluorescence, photostability, and biocompatibility nature of TL19 aggregates. On the other hand, an internet of things (IoT)-embedded 3D printed portable device is constructed for the detection of Cu2+ ions in real water samples. The Cu2+ detection is achieved through an IoT device, and results were acknowledged through an android application in 3.32 s round-trip time. Thus, the IoT-enabled AIE probe could be a prospective device for Cu2+ detection in a constrained environment.
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Affiliation(s)
- Arunkumar Kathiravan
- Department
of Chemistry, Department of Computer Science, Vel Tech
Rangarajan Dr Sagunthala R & D Institute
of Science and Technology, Avadi, Chennai, Tamil Nadu 600 062, India
| | - Themmila Khamrang
- Department
of Chemistry, C. I. College, Bishnupur, Manipur 795126, India
| | - Namasivayam Dhenadhayalan
- Department
of Chemistry, National Taiwan University
and Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - King-Chuen Lin
- Department
of Chemistry, National Taiwan University
and Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - Kanagachidambaresan Ramasubramanian
- Department
of Chemistry, Department of Computer Science, Vel Tech
Rangarajan Dr Sagunthala R & D Institute
of Science and Technology, Avadi, Chennai, Tamil Nadu 600 062, India
| | - Madhavan Jaccob
- Department
of Chemistry & Computational Chemistry Laboratory, Loyola Institute
of Frontier Energy (LIFE), Loyola College, Chennai, Tamil Nadu 600 034, India
| | - Marappan Velusamy
- Department
of Chemistry, North-Eastern Hill University, Shillong, Meghalaya 793 022, India
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12
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Sohtun WP, Khamrang T, Kannan A, Balakrishnan G, Saravanan D, Akhbarsha MA, Velusamy M, Palaniandavar M. Iron(III) bis‐complexes of Schiff bases of
S
‐methyldithiocarbazates: Synthesis, structure, spectral and redox properties and cytotoxicity. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5593] [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: 12/16/2022]
Affiliation(s)
- Winaki P. Sohtun
- Department of ChemistryNorth Eastern Hill University Shillong 793022 India
| | - Themmila Khamrang
- Department of ChemistryNorth Eastern Hill University Shillong 793022 India
- Present Address: C. I. College, Bishnupur Manipur 795126 India
| | | | - Gowdhami Balakrishnan
- Mahatma Gandhi‐Doerenkamp Center for Alternatives to Use of Animals in Life Science EducationBharathidasan University Tiruchirappalli 620024 India
| | | | - Mohammad Abdulkader Akhbarsha
- Mahatma Gandhi‐Doerenkamp Center for Alternatives to Use of Animals in Life Science EducationBharathidasan University Tiruchirappalli 620024 India
| | - Marappan Velusamy
- Department of ChemistryNorth Eastern Hill University Shillong 793022 India
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13
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Hsia CH, Velusamy M, Sheu JR, Khamrang T, Jayakumar T, Lu WJ, Lin KH, Chang CC. Author Correction: A novel ruthenium (II)-derived organometallic compound, TQ-6, potently inhibits platelet aggregation: Ex vivo and in vivo studies. Sci Rep 2020; 10:1743. [PMID: 31996702 PMCID: PMC6989507 DOI: 10.1038/s41598-020-58043-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Chih-Hsuan Hsia
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, 110, Taiwan
| | - Marappan Velusamy
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, 110, Taiwan.,Department of Chemistry, North Eastern Hill University, Shillong, 793022, India
| | - Joen-Rong Sheu
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, 110, Taiwan
| | - Themmila Khamrang
- Department of Chemistry, North Eastern Hill University, Shillong, 793022, India
| | - Thanasekaran Jayakumar
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, 110, Taiwan
| | - Wan-Jung Lu
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, 110, Taiwan.,Department of Medical Research, Taipei Medical University Hospital, Taipei, 110, Taiwan.,Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, 110, Taiwan
| | - Kuan-Hung Lin
- Central Laboratory, Shin-Kong Wu Ho-Su Memorial Hospital, Taipei, 111, Taiwan
| | - Chao-Chien Chang
- Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, 110, Taiwan. .,Department of Cardiology, Cathay General Hospital, Taipei, 106, Taiwan.
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14
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Khamrang T, Velusamy M, Ramesh M, Jhonsi MA, Jaccob M, Ramasubramanian K, Kathiravan A. IoT-enabled dye-sensitized solar cells: an effective embedded tool for monitoring the outdoor device performance. RSC Adv 2020; 10:35787-35791. [PMID: 35517061 PMCID: PMC9056899 DOI: 10.1039/d0ra07353a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 08/27/2020] [Accepted: 09/10/2020] [Indexed: 11/21/2022] Open
Abstract
Herein, we have developed a tool for monitoring the outdoor performance of dye-sensitized solar cells.
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Affiliation(s)
- Themmila Khamrang
- Department of Chemistry
- North Eastern Hill University
- Shillong 793 022
- India
- Department of Chemistry
| | - Marappan Velusamy
- Department of Chemistry
- North Eastern Hill University
- Shillong 793 022
- India
| | - Mohan Ramesh
- Functional Materials Division
- CSIR-Central Electrochemical Research Institute
- Karaikudi 630 003
- India
| | - Mariadoss Asha Jhonsi
- Department of Chemistry
- B. S. Abdur Rahman Crescent Institute of Science and Technology
- Chennai-600 048
- India
| | - Madhavan Jaccob
- Department of Chemistry & Computational Chemistry Laboratory
- Loyola Institute of Frontier Energy (LIFE)
- Loyola College
- Chennai
- India
| | | | - Arunkumar Kathiravan
- Vel Tech Research Park
- Vel Tech Rangarajan Dr Sagunthala R & D Institute of Science and Technology
- Chennai-600 062
- India
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15
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Kathiravan A, Gowri A, Khamrang T, Kumar MD, Dhenadhayalan N, Lin KC, Velusamy M, Jaccob M. Pyrene-Based Chemosensor for Picric Acid—Fundamentals to Smartphone Device Design. Anal Chem 2019; 91:13244-13250. [DOI: 10.1021/acs.analchem.9b03695] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Arunkumar Kathiravan
- Vel Tech Research Park, Vel Tech Rangarajan Dr Sagunthala R&D Institute of Science and Technology, Avadi, Chennai, Tamil Nadu 600 062, India
| | - Annasamy Gowri
- Vel Tech Research Park, Vel Tech Rangarajan Dr Sagunthala R&D Institute of Science and Technology, Avadi, Chennai, Tamil Nadu 600 062, India
| | - Themmila Khamrang
- Department of Chemistry, North Eastern Hill University, Shillong, Meghalaya 793 022, India
- Department of Chemistry, C. I. College, Bishnupur, Manipur 795126, India
| | - Madhu Deepan Kumar
- Department of Chemistry & Computational Chemistry Laboratory, Loyola Institute of Frontier Energy (LIFE), Loyola College, Chennai, Tamil Nadu 600 034, India
| | - Namasivayam Dhenadhayalan
- Department of Chemistry, National Taiwan University and Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - King-Chuen Lin
- Department of Chemistry, National Taiwan University and Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - Marappan Velusamy
- Department of Chemistry, North Eastern Hill University, Shillong, Meghalaya 793 022, India
| | - Madhavan Jaccob
- Department of Chemistry & Computational Chemistry Laboratory, Loyola Institute of Frontier Energy (LIFE), Loyola College, Chennai, Tamil Nadu 600 034, India
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Priyanga S, Khamrang T, Velusamy M, Karthi S, Ashokkumar B, Mayilmurugan R. Coordination geometry-induced optical imaging of l-cysteine in cancer cells using imidazopyridine-based copper(ii) complexes. Dalton Trans 2019; 48:1489-1503. [PMID: 30632585 DOI: 10.1039/c8dt04634d] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Overexpression of cysteine cathepsins proteases has been documented in a wide variety of cancers, and enhances the l-cysteine concentration in tumor cells. We report the synthesis and characterization of copper(ii) complexes [Cu(L1)2(H2O)](SO3CF3)2, 1, L1 = 3-phenyl-1-(pyridin-2-yl)imidazo[1,5-a]pyridine, [Cu(L2)2(SO3CF3)]SO3CF3, 2, L2 = 3-(4-methoxyphenyl)-1-pyridin-2-yl-imidazo[1,5-a]pyridine, [Cu(L3)2(H2O)](SO3CF3)2, 3, L3 = 3-(3,4-dimethoxy-phenyl)-1-pyridin-2-yl-imidazo[1,5-a]pyridine and [Cu(L4)2(H2O)](SO3CF3)2, 4, L4 = dimethyl-[4-(1-pyridin-2-yl-imidazo[1,5-a]pyridin-3-yl)phenyl]amine as 'turn-on' optical imaging probes for l-cysteine in cancer cells. The molecular structure of complexes adopted distorted trigonal pyramidal geometry (τ, 0.68-0.87). Cu-Npy bonds (1.964-1.989 Å) were shorter than Cu-Nimi bonds (2.024-2.074 Å) for all complexes. Geometrical distortion was strongly revealed in EPR spectra, showing g‖ (2.26-2.28) and A‖ values (139-163 × 10-4 cm-1) at 70 K. The d-d transitions appeared around 680-741 and 882-932 nm in HEPES, which supported the existence of five-coordinate geometry in solution. The Cu(ii)/Cu(i) redox potential of 1 (0.221 V vs. NHE) was almost identical to that of 2 and 3 but lower than that of 4 (0.525 V vs. NHE) in HEPES buffer. The complexes were almost non-emissive in nature, but became emissive by the interaction of l-cysteine in 100% HEPES at pH 7.34 via reduction of Cu(ii) to Cu(i). Among the probes, probe 2 showed selective and efficient turn-on fluorescence behavior towards l-cysteine over natural amino acids with a limit of detection of 9.9 × 10-8 M and binding constant of 2.3 × 105 M-1. The selectivity of 2 may have originated from a nearly perfect trigonal plane adopted around a copper(ii) center (∼120.70°), which required minimum structural change during the reduction of Cu(ii) to Cu(i) while imaging Cys. The other complexes, with their distorted trigonal planes, required more reorganizational energy, which resulted in poor selectivity. Probe 2 was employed for optical imaging of l-cysteine in HeLa cells and macrophages. It exhibited brighter fluorescent images by visualizing Cys at pH 7.34 and 37 °C. It showed relatively less toxicity for these cell lines as ascertained by the MTT assay.
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Affiliation(s)
- Selvarasu Priyanga
- Bioinorganic Chemistry Laboratory/Physical Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai, 625021, India.
| | - Themmila Khamrang
- Department of Chemistry, North-Eastern Hill University, Shillong, 793022, India
| | - Marappan Velusamy
- Department of Chemistry, North-Eastern Hill University, Shillong, 793022, India
| | - Sellamuthu Karthi
- School of Biotechnology, Madurai Kamaraj University, Madurai, 625 021, India
| | | | - Ramasamy Mayilmurugan
- Bioinorganic Chemistry Laboratory/Physical Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai, 625021, India.
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17
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Yang CH, Hsia CW, Jayakumar T, Sheu JR, Hsia CH, Khamrang T, Chen YJ, Manubolu M, Chang Y. Structure⁻Activity Relationship Study of Newly Synthesized Iridium-III Complexes as Potential Series for Treating Thrombotic Diseases. Int J Mol Sci 2018; 19:ijms19113641. [PMID: 30463221 PMCID: PMC6274890 DOI: 10.3390/ijms19113641] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 11/05/2018] [Accepted: 11/15/2018] [Indexed: 01/07/2023] Open
Abstract
Platelets play a major role in hemostatic events and are associated with various pathological events, such as arterial thrombosis and atherosclerosis. Iridium (Ir) compounds are potential alternatives to platinum compounds, since they exert promising anticancer effects without cellular toxicity. Our recent studies found that Ir compounds show potent antiplatelet properties. In this study, we evaluated the in vitro antiplatelet, in vivo antithrombotic and structure⁻activity relationship (SAR) of newly synthesized Ir complexes, Ir-1, Ir-2 and Ir-4, in agonists-induced human platelets. Among the tested compounds, Ir-1 was active in inhibiting platelet aggregation induced by collagen; however, Ir-2 and Ir-4 had no effects even at their maximum concentrations of 50 μM against collagen and 500 μM against U46619-induced aggregation. Similarly, Ir-1 was potently inhibiting of adenosine triphosphate (ATP) release, calcium mobilization ([Ca2+]i) and P-selectin expression induced by collagen-induced without cytotoxicity. Likewise, Ir-1 expressively suppressed collagen-induced Akt, PKC, p38MAPKs and JNK phosphorylation. Interestingly, Ir-2 and Ir-4 had no effect on platelet function analyzer (PFA-100) collagen-adenosine diphosphate (C-ADP) and collagen-epinephrine (C-EPI) induced closure times in mice, but Ir-1 caused a significant increase when using C-ADP stimulation. Other in vivo studies revealed that Ir-1 significantly prolonged the platelet plug formation, increased tail bleeding times and reduced the mortality of adenosine diphosphate (ADP)-induced acute pulmonary thromboembolism in mice. Ir-1 has no substitution on its phenyl group, a water molecule (like cisplatin) can replace its chloride ion and, hence, the rate of hydrolysis might be tuned by the substituent on the ligand system. These features might have played a role for the observed effects of Ir-1. These results indicate that Ir-1 may be a lead compound to design new antiplatelet drugs for the treatment of thromboembolic diseases.
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Affiliation(s)
- Chih-Hao Yang
- Department of Pharmacology, Schools of Medicine, College of Medicine, Taipei Medical University, No. 250, Wu Hsing St., Taipei 110, Taiwan.
| | - Chih-Wei Hsia
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, No. 250, Wu Hsing St., Taipei 110, Taiwan.
| | - Thanasekaran Jayakumar
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, No. 250, Wu Hsing St., Taipei 110, Taiwan.
| | - Joen-Rong Sheu
- Department of Pharmacology, Schools of Medicine, College of Medicine, Taipei Medical University, No. 250, Wu Hsing St., Taipei 110, Taiwan.
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, No. 250, Wu Hsing St., Taipei 110, Taiwan.
| | - Chih-Hsuan Hsia
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, No. 250, Wu Hsing St., Taipei 110, Taiwan.
| | - Themmila Khamrang
- Department of Chemistry, North Eastern Hill University, Shillong 793022, India.
| | - Yen-Jen Chen
- Department of Pharmacology, Schools of Medicine, College of Medicine, Taipei Medical University, No. 250, Wu Hsing St., Taipei 110, Taiwan.
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, No. 250, Wu Hsing St., Taipei 110, Taiwan.
| | - Manjunath Manubolu
- Department of Evolution, Ecology and Organismal Biology, Ohio State University, Columbus, OH 43212, USA.
| | - Yi Chang
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, No. 250, Wu Hsing St., Taipei 110, Taiwan.
- Department of Anesthesiology, Shin Kong Wu Ho-Su Memorial Hospital, No. 95, Wen Chang Rd., Taipei 111, Taiwan.
- School of Medicine, Fu-Jen Catholic University, No. 510, Zhong Zheng Rd, Xin Zhuang Dist., New Taipei City 242, Taiwan.
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18
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Jayakumar T, Hsu CY, Khamrang T, Hsia CH, Hsia CW, Manubolu M, Sheu JR. Possible Molecular Targets of Novel Ruthenium Complexes in Antiplatelet Therapy. Int J Mol Sci 2018; 19:ijms19061818. [PMID: 29925802 PMCID: PMC6032250 DOI: 10.3390/ijms19061818] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 06/13/2018] [Accepted: 06/15/2018] [Indexed: 12/19/2022] Open
Abstract
In oncotherapy, ruthenium (Ru) complexes are reflected as potential alternatives for platinum compounds and have been proved as encouraging anticancer drugs with high efficacy and low side effects. Cardiovascular diseases (CVDs) are mutually considered as the number one killer globally, and thrombosis is liable for the majority of CVD-related deaths. Platelets, an anuclear and small circulating blood cell, play key roles in hemostasis by inhibiting unnecessary blood loss of vascular damage by making blood clot. Platelet activation also plays a role in cancer metastasis and progression. Nevertheless, abnormal activation of platelets results in thrombosis under pathological settings such as the rupture of atherosclerotic plaques. Thrombosis diminishes the blood supply to the heart and brain resulting in heart attacks and strokes, respectively. While currently used anti-platelet drugs such as aspirin and clopidogrel demonstrate efficacy in many patients, they exert undesirable side effects. Therefore, the development of effective therapeutic strategies for the prevention and treatment of thrombotic diseases is a demanding priority. Recently, precious metal drugs have conquered the subject of metal-based drugs, and several investigators have motivated their attention on the synthesis of various ruthenium (Ru) complexes due to their prospective therapeutic values. Similarly, our recent studies established that novel ruthenium-based compounds suppressed platelet aggregation via inhibiting several signaling cascades. Our study also described the structure antiplatelet-activity relationship (SAR) of three newly synthesized ruthenium-based compounds. This review summarizes the antiplatelet activity of newly synthesized ruthenium-based compounds with their potential molecular mechanisms.
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Affiliation(s)
- Thanasekaran Jayakumar
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| | - Chia-Yuan Hsu
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
- Department of Life Sciences, National Chung Hsing University, Taichung 402, Taiwan.
| | - Themmila Khamrang
- Department of Chemistry, North Eastern Hill University, Shillong 793022, India.
| | - Chih-Hsuan Hsia
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| | - Chih-Wei Hsia
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| | - Manjunath Manubolu
- Department of Evolution, Ecology and Organismal Biology, Ohio State University, Columbus, OH 43212, USA.
| | - Joen-Rong Sheu
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
- Department of Pharmacology, School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
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19
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Khamrang T, Velusamy M, Jaccob M, Ramesh M, Kathiresan M, Kathiravan A. A combined experimental and computational investigation on pyrene based D-π-A dyes. Phys Chem Chem Phys 2018; 20:6264-6273. [PMID: 29431799 DOI: 10.1039/c7cp08038g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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
The geometry (twist vs. planar) of a dye is one of the most pivotal factors for determining intramolecular charge transfer (ICT), light harvesting and photovoltaic properties of dye-sensitized solar cells. In order to comprehend the role of dye geometry on the above properties, we have devised the pyrene based D-π-A dyes namely 2-cyano-3-(5-pyren-1-yl-furan-2-yl)-acrylic acid (PFCC) and 2-cyano-3-(5-pyren-1-ylethynyl-furan-2-yl)-acrylic acid (PEFCC). The synthesized pyrene dyes were well characterized by NMR and EI-MS spectrometry. In both the dyes, the donor (pyrene) and acceptor (cyanoacrylic acid) segments remained the same. The varied π-spacers were furan and ethynyl furan. The influences of the ethynyl spacer on the energy levels, light absorption, dynamics of excited states and photovoltaic properties of the DSCs were systematically investigated via theoretical calculations and spectroscopic measurements. UV-visible absorption spectral measurements indicated that the introduction of the ethynyl spacer enhances the molar absorptivity of a dye (PEFCC) in the order of 2, but does not shift the absorption range, which is consistent with the results obtained from density functional theory (DFT) calculations. The theoretical analysis indicated that the charge transfer transition is mainly constituted of the HOMO to the LUMO that were found to be located on donor and acceptor segments, respectively, which is supportive for efficient charge separation and electron injection processes. TDDFT calculations highlighted that the LUMO of the PEFCC dye is more stabilized by the incorporation of the ethynyl group between the pyrene and furan moieties that aid to inject electrons efficiently into TiO2 thereby resulting in an enhanced power conversion efficiency of 2.47% when compared to the PFCC dye. Notably, the overall conversion efficiency of the PEFCC dye reached 60% with respect to that of an N719-based device (4.12%) fabricated under similar conditions. Transient absorption kinetic studies demonstrated that a slower charge recombination rate is an essential factor behind enhanced efficiencies in PEFCC based cells.
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Affiliation(s)
- Themmila Khamrang
- Department of Chemistry, North Eastern Hill University, Shillong 793 022, Meghalaya, India
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20
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Hsia CH, Jayakumar T, Sheu JR, Tsao SY, Velusamy M, Hsia CW, Chou DS, Chang CC, Chung CL, Khamrang T, Lin KC. Structure-Antiplatelet Activity Relationships of Novel Ruthenium (II) Complexes: Investigation of Its Molecular Targets. Molecules 2018; 23:molecules23020477. [PMID: 29470443 PMCID: PMC6017231 DOI: 10.3390/molecules23020477] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 02/14/2018] [Accepted: 02/19/2018] [Indexed: 01/02/2023] Open
Abstract
The regulation of platelet function by pharmacological agents that modulate platelet signaling has proven to be a positive approach to the prevention of thrombosis. Ruthenium complexes are fascinating for the development of new drugs, as they possess numerous chemical and biological properties. The present study aims to evaluate the structure-activity relationship (SAR) of newly synthesized ruthenium (II) complexes, TQ-1, TQ-2 and TQ-3 in agonists-induced washed human platelets. Silica gel column chromatography, aggregometry, immunoblotting, NMR, and X-ray analyses were performed in this study. Of the three tested compounds, TQ-3 showed a concentration (1–5 μM) dependent inhibitory effect on platelet aggregation induced by collagen (1 μg/mL) and thrombin (0.01 U/mL) in washed human platelets; however, TQ-1 and TQ-2 had no response even at 250 μM of collagen and thrombin-induced aggregation. TQ-3 was effective with inhibiting collagen-induced ATP release, calcium mobilization ([Ca2+]i) and P-selectin expression without cytotoxicity. Moreover, TQ-3 significantly abolished collagen-induced Lyn-Fyn-Syk, Akt-JNK and p38 mitogen-activated protein kinases (p38 MAPKs) phosphorylation. The compound TQ-3 containing an electron donating amino group with two phenyl groups of the quinoline core could be accounted for by its hydrophobicity and this nature might be the reason for the noted antiplatelet effects of TQ-3. The present results provide a molecular basis for the inhibition by TQ-3 in collagen-induced platelet aggregation, through the suppression of multiple machineries of the signaling pathway. These results may suggest that TQ-3 can be considered a potential agent for the treatment of vascular diseases.
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Affiliation(s)
- Chih-Hsuan Hsia
- Graduate Institute of Medical Sciences and Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| | - Thanasekaran Jayakumar
- Graduate Institute of Medical Sciences and Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| | - Joen-Rong Sheu
- Graduate Institute of Medical Sciences and Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| | - Shin-Yi Tsao
- Division of Endocrinology & Metabolism, Department of Internal Medicine, Sijhih Cathay General Hospital, New Taipei 22174, Taiwan.
| | - Marappan Velusamy
- Department of Chemistry, North Eastern Hill University, Shillong 793022, India.
| | - Chih-Wei Hsia
- Graduate Institute of Medical Sciences and Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| | - Duen-Suey Chou
- Graduate Institute of Medical Sciences and Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| | - Chao-Chien Chang
- Department of Cardiology, Cathay General Hospital, Taipei 106, Taiwan.
| | - Chi-Li Chung
- Division of Pulmonary Medicine, Department of Internal Medicine, Taipei Medical University Hospital, Taipei 106, Taiwan.
| | - Themmila Khamrang
- Graduate Institute of Medical Sciences and Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
- Department of Chemistry, North Eastern Hill University, Shillong 793022, India.
| | - Kao-Chang Lin
- Graduate Institute of Medical Sciences and Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
- Department of Neurology, Chi Mei Medical Center, Tainan 710, Taiwan.
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21
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Khamrang T, Hung KC, Hsia CH, Hsieh CY, Velusamy M, Jayakumar T, Sheu JR. Antiplatelet Activity of a Newly Synthesized Novel Ruthenium (II): A Potential Role for Akt/JNK Signaling. Int J Mol Sci 2017; 18:ijms18050916. [PMID: 28448438 PMCID: PMC5454829 DOI: 10.3390/ijms18050916] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 04/04/2017] [Accepted: 04/18/2017] [Indexed: 01/18/2023] Open
Abstract
In oncotherapy, ruthenium complexes are considered as potential alternatives for platinum compounds, and have been proved as promising anticancer drugs with high efficacy and lesser side effects. Platelet activation plays a major role in cancer metastasis and progression. Hence, this study explored the effect of a newly synthesized ruthenium complex, [Ru(η6-cymene)(L)Cl]BF4(TQ5), where L = 4-phenyl-2-pyridin-2-yl-quinazoline), on human platelet activation. TQ5 (3–5 µM) inhibited concentration-dependent collagen-induced platelet aggregation in washed human platelets. However, this compound only inhibited platelet aggregation at a maximum concentration of 500 and 100 µM against thrombin and 9,11-dideoxy-11α, 9α-epoxymethanoprostaglandin (U46619)-induced stimulation, respectively. TQ5 inhibited collagen-induced ATP release and calcium mobilization ([Ca2+]i), without inducing cell cytotoxicity. In addition, neither SQ22536, an adenylate cyclase inhibitor, nor 1H-[1,2,4] oxadiazolo [4,3-a]quinoxalin-1-one (ODQ), a guanylate cyclase inhibitor, significantly reversed the TQ5-mediated inhibition of platelet aggregation. TQ5 inhibited the collagen-induced phosphorylation of protein kinase B (Akt) and c-Jun N-terminal kinase (JNK), but did not effectively inhibit extracellular signal-regulated kinase 1/2 (ERK1/2) and p38-mitogen-activated protein kinase (p38-MAPK) in human platelets. Additionally, TQ5 significantly prolonged the closure time in whole blood and increased the occlusion time of thrombotic platelet plug formation in mice. This study demonstrates, for the first time, that a newly synthesized ruthenium complex, TQ5, exhibits potent antiplatelet activity by hindering ATP release and [Ca2+]i, and by decreasing the activation of Akt/JNK signals. Together, these results suggest that TQ5 could be developed as a therapeutic agent that helps prevent or treat thromboembolic disorders, since it is found to be potently more effective than a well-established antithrombotic aspirin.
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Affiliation(s)
- Themmila Khamrang
- Department of Chemistry, North Eastern Hill University, Shillong 793022, India.
| | - Kuo-Chen Hung
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
- Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
- Gastroenterologic Surgery Division, Department of Surgery, Yuan's General Hospital, Kaohsiung 249, Taiwan.
| | - Chih-Hsuan Hsia
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
- Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| | - Cheng-Ying Hsieh
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
- Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| | - Marappan Velusamy
- Department of Chemistry, North Eastern Hill University, Shillong 793022, India.
| | - Thanasekaran Jayakumar
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
- Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
| | - Joen-Rong Sheu
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
- Department of Pharmacology, College of Medicine, Taipei Medical University, Taipei 110, Taiwan.
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22
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Muthuramalingam S, Subramaniyan S, Khamrang T, Velusamy M, Mayilmurugan R. Copper(II)-Bioinspired Models for Copper Amine Oxidases: Oxidative Half-Reaction in Water. ChemistrySelect 2017. [DOI: 10.1002/slct.201601786] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sethuraman Muthuramalingam
- Bioinorganic Chemistry Laboratory/Physical Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai 625 021, Tamil Nadu India
| | - Shanmugam Subramaniyan
- Bioinorganic Chemistry Laboratory/Physical Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai 625 021, Tamil Nadu India
| | - Themmila Khamrang
- Department of Chemistry; North Eastern Hill Universuty; Shillong- 793022 India
| | - Marappan Velusamy
- Department of Chemistry; North Eastern Hill Universuty; Shillong- 793022 India
| | - Ramasamy Mayilmurugan
- Bioinorganic Chemistry Laboratory/Physical Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai 625 021, Tamil Nadu India
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23
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Muthuramalingam S, Khamrang T, Velusamy M, Mayilmurugan R. Catalytic fixation of atmospheric carbon dioxide by copper(ii) complexes of bidentate ligands. Dalton Trans 2017; 46:16065-16076. [DOI: 10.1039/c7dt03062b] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The copper(ii) complexes of simple bidentate ligands have shown selective fixation and sequestration of atmospheric CO2. The fixation of CO2 proceeds via copper(i) species and geometrical interconversions and afforded CO32− bound complexes.
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Affiliation(s)
- Sethuraman Muthuramalingam
- Bioinorganic Chemistry Laboratory/Physical Chemistry
- School of Chemistry
- Madurai Kamaraj University
- Madurai 625021
- India
| | - Themmila Khamrang
- Department of Chemistry
- North Eastern Hill University
- Shillong 793022
- India
| | - Marappan Velusamy
- Department of Chemistry
- North Eastern Hill University
- Shillong 793022
- India
| | - Ramasamy Mayilmurugan
- Bioinorganic Chemistry Laboratory/Physical Chemistry
- School of Chemistry
- Madurai Kamaraj University
- Madurai 625021
- India
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24
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Kathiravan A, Srinivasan V, Khamrang T, Velusamy M, Jaccob M, Pavithra N, Anandan S, Velappan K. Pyrene based D–π–A architectures: synthesis, density functional theory, photophysics and electron transfer dynamics. Phys Chem Chem Phys 2017; 19:3125-3135. [DOI: 10.1039/c6cp08180k] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [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
Pyrene derivatives show immense potential as sensitizers for dye-sensitized solar cells (DSCs).
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Affiliation(s)
- Arunkumar Kathiravan
- National Centre for Ultrafast Processes
- University of Madras
- Chennai – 600 113
- India
| | | | - Themmila Khamrang
- Department of Chemistry
- North Eastern Hill University
- Shillong 793 022
- India
| | - Marappan Velusamy
- Department of Chemistry
- North Eastern Hill University
- Shillong 793 022
- India
| | - Madhavan Jaccob
- Department of Chemistry
- Loyola College
- Chennai – 600 034
- India
- Computational Chemistry Laboratory
| | - Nagaraj Pavithra
- Nanomaterials and Solar Energy Conversion Laboratory
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli – 620 015
- India
| | - Sambandam Anandan
- Nanomaterials and Solar Energy Conversion Laboratory
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli – 620 015
- India
| | - Kandavelu Velappan
- Department of Chemistry
- Sri Shakthi Institute of Engineering & Technology
- Coimbatore 641 062
- India
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25
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Khamrang T, Kartikeyan R, Velusamy M, Rajendiran V, Dhivya R, Perumalsamy B, Akbarsha MA, Palaniandavar M. Synthesis, structures, and DNA and protein binding of ruthenium(ii)-p-cymene complexes of substituted pyridylimidazo[1,5-a]pyridine: enhanced cytotoxicity of complexes of ligands appended with a carbazole moiety. RSC Adv 2016. [DOI: 10.1039/c6ra23663d] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The cytotoxicity of ruthenium-arene complexes appended with carbazole moiety correlates with their DNA binding ability.
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Affiliation(s)
- Themmila Khamrang
- Department of Chemistry
- North Eastern Hill University
- Shillong 793022
- India
| | - Radhakrishnan Kartikeyan
- Department of Chemistry
- School of Basic and Applied Sciences
- Central University of Tamil Nadu
- Thiruvarur 610101
- India
| | - Marappan Velusamy
- Department of Chemistry
- North Eastern Hill University
- Shillong 793022
- India
| | - Venugopal Rajendiran
- Department of Chemistry
- School of Basic and Applied Sciences
- Central University of Tamil Nadu
- Thiruvarur 610101
- India
| | - Rajakumar Dhivya
- Mahatma Gandhi-Doerenkamp Center for Alternatives to Use of Animals in Life Science Education
- Bharathidasan University
- Tiruchirappalli 620024
- India
| | - Balaji Perumalsamy
- Mahatma Gandhi-Doerenkamp Center for Alternatives to Use of Animals in Life Science Education
- Bharathidasan University
- Tiruchirappalli 620024
- India
| | - Mohammad Abdulkadher Akbarsha
- Mahatma Gandhi-Doerenkamp Center for Alternatives to Use of Animals in Life Science Education
- Bharathidasan University
- Tiruchirappalli 620024
- India
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