1
|
Carl S, Will J, Madubuko N, Götz A, Przybilla T, Wu M, Raman N, Wirth J, Taccardi N, Zubiri BA, Haumann M, Wasserscheid P, Spiecker E. Structural Evolution of GaO x-Shell and Intermetallic Phases in Ga-Pt Supported Catalytically Active Liquid Metal Solutions. J Phys Chem Lett 2024; 15:4711-4720. [PMID: 38657124 DOI: 10.1021/acs.jpclett.3c03494] [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: 04/26/2024]
Abstract
We present a comprehensive scale-bridging characterization approach for supported catalytically active liquid metal solutions (SCALMS) which combines lab-based X-ray microscopy, nano X-ray computed tomography (nano-CT), and correlative analytical transmission electron microscopy. SCALMS catalysts consist of low-melting alloy particles and have demonstrated high catalytic activity, selectivity, and long-term stability in propane dehydrogenation (PDH). We established an identical-location nano-CT workflow which allows us to reveal site-specific changes of Ga-Pt SCALMS before and after PDH. These observations are complemented by analytical transmission electron microscopy investigations providing information on the structure, chemical composition, and phase distribution of individual SCALMS particles. Key findings of this combined microscopic approach include (i) structural evolution of the SCALMS particles' GaOx shell, (ii) Pt segregation toward the oxide shell leading to the formation of Ga-Pt intermetallic phases, and (iii) cracking of the oxide shell accompanied by the release of liquid Ga-Pt toward the porous support.
Collapse
Affiliation(s)
- S Carl
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - J Will
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - N Madubuko
- Lehrstuhl für Chemische Reaktionstechnik (CRT), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - A Götz
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - T Przybilla
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - M Wu
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - N Raman
- Lehrstuhl für Chemische Reaktionstechnik (CRT), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - J Wirth
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - N Taccardi
- Lehrstuhl für Chemische Reaktionstechnik (CRT), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - B Apeleo Zubiri
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - M Haumann
- Lehrstuhl für Chemische Reaktionstechnik (CRT), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
- Research Centre for Synthesis and Catalysis, Department of Chemistry, University of Johannesburg, P.O. Box 524, 2006 Auckland Park, South Africa
| | - P Wasserscheid
- Lehrstuhl für Chemische Reaktionstechnik (CRT), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK 11), Forschungszentrum Jülich GmbH, Egerlandstr. 3, 91058 Erlangen, Germany
| | - E Spiecker
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| |
Collapse
|
2
|
Wang X, Raman N, Lemtiri-Chlieh G, Chang J, Jagtap S, Chowdhury DD, Ballew M, Carrieri FA, Nguyen T, Nugent K, Peck T, Levine MS, Chan A, Lam C, Malek R, Hoang T, Phillips R, Cheng Z, Taparra K, Connis N, Hann CL, Holland A, Tran PT, Lafargue A, Wang H. Griseofulvin Radiosensitizes Non-Small Cell Lung Cancer Cells and Activates cGAS. Mol Cancer Ther 2023; 22:519-528. [PMID: 36752776 PMCID: PMC10073282 DOI: 10.1158/1535-7163.mct-22-0191] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 10/28/2022] [Accepted: 01/31/2023] [Indexed: 02/09/2023]
Abstract
Extra copies of centrosomes are frequently observed in cancer cells. To survive and proliferate, cancer cells have developed strategies to cluster extra-centrosomes to form bipolar mitotic spindles. The aim of this study was to investigate whether centrosome clustering (CC) inhibition (CCi) would preferentially radiosensitize non-small cell lung cancer (NSCLC). Griseofulvin (GF; FDA-approved treatment) inhibits CC, and combined with radiation treatment (RT), resulted in a significant increase in the number of NSCLC cells with multipolar spindles, and decreased cell viability and colony formation ability in vitro. In vivo, GF treatment was well tolerated by mice, and the combined therapy of GF and radiation treatment resulted in a significant tumor growth delay. Both GF and radiation treatment also induced the generation of micronuclei (MN) in vitro and in vivo and activated cyclic GMP-AMP synthase (cGAS) in NSCLC cells. A significant increase in downstream cGAS-STING pathway activation was seen after combination treatment in A549 radioresistant cells that was dependent on cGAS. In conclusion, GF increased radiation treatment efficacy in lung cancer preclinical models in vitro and in vivo. This effect may be associated with the generation of MN and the activation of cGAS. These data suggest that the combination therapy of CCi, radiation treatment, and immunotherapy could be a promising strategy to treat NSCLC.
Collapse
Affiliation(s)
- Xing Wang
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
- Department of Breast and Thyroid Surgery, Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Natasha Raman
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
| | - Ghali Lemtiri-Chlieh
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
| | - Jinhee Chang
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
- Department of Radiation Oncology, Division of Translational Radiation Sciences, University of Maryland Baltimore, School of Medicine, Baltimore, MD, USA
| | - Shreya Jagtap
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
- Department of Radiation Oncology, Division of Translational Radiation Sciences, University of Maryland Baltimore, School of Medicine, Baltimore, MD, USA
| | - Dipanwita Dutta Chowdhury
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
- Department of Radiation Oncology, Division of Translational Radiation Sciences, University of Maryland Baltimore, School of Medicine, Baltimore, MD, USA
| | - Matthew Ballew
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
| | - Francesca Anna Carrieri
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
- Department of Radiation Oncology, Division of Translational Radiation Sciences, University of Maryland Baltimore, School of Medicine, Baltimore, MD, USA
| | - Triet Nguyen
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
- Department of Radiation Oncology, Division of Translational Radiation Sciences, University of Maryland Baltimore, School of Medicine, Baltimore, MD, USA
| | - Katriana Nugent
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
| | - Travis Peck
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
| | - Michelle S. Levine
- Department of Molecular Biology and Genetics, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
| | - Aaron Chan
- Department of Radiation Oncology, Division of Translational Radiation Sciences, University of Maryland Baltimore, School of Medicine, Baltimore, MD, USA
| | - Christine Lam
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
| | - Reem Malek
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
| | - Tung Hoang
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
| | - Ryan Phillips
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
- Department of Radiation Oncology, The Mayo Clinic, Rochester, MN, USA
| | - ZhuoAn Cheng
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
- State Key Laboratory of Oncogenes and Related Genes, Renji Hospital, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, China
| | - Kekoa Taparra
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
- Department of Radiation Oncology, Stanford Medicine, Stanford, CA, USA
| | - Nick Connis
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
| | - Christine L. Hann
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
| | - Andrew Holland
- Department of Molecular Biology and Genetics, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
| | - Phuoc T. Tran
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
- Department of Radiation Oncology, Division of Translational Radiation Sciences, University of Maryland Baltimore, School of Medicine, Baltimore, MD, USA
- Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
- Department of Urology, James Buchanan Urological Institute, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
| | - Audrey Lafargue
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
- Department of Radiation Oncology, Division of Translational Radiation Sciences, University of Maryland Baltimore, School of Medicine, Baltimore, MD, USA
| | - Hailun Wang
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University, School of Medicine, Baltimore, MD, USA
- GenoImmune Therapeutics, Wuhan, China
| |
Collapse
|
3
|
Zelikson V, Simmons G, Raman N, Krieger E, Rebiero A, Hawks K, Aziz M, Roberts C, Chesney A, Reed J, Gress R, Toor A. Dynamical Systems Modeling of Early-Term Immune Reconstitution with Different Antithymocyte Globulin Administration Schedules in Allogeneic Stem Cell Transplantation. Transplant Cell Ther 2022; 28:85.e1-85.e9. [PMID: 34688968 PMCID: PMC8820845 DOI: 10.1016/j.jtct.2021.10.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 06/05/2021] [Revised: 10/06/2021] [Accepted: 10/12/2021] [Indexed: 02/03/2023]
Abstract
Alloreactivity forms the basis of allogeneic hematopoietic cell transplantation (HCT), with donor-derived T cell response to recipient antigens mediating clinical responses either in part or entirely. These encompass the different manifestations of graft-versus-host disease (GVHD), infection risk, and disease response. While the latter is contingent on disease biology and thus may be less predictable, the former 2 manifestations are more likely to be directly proportional to the magnitude of donor-derived T cell recovery. Herein we explore the quantitative aspects of immune cell recovery following allogeneic HCT and clinical outcomes in 2 cohorts of HLA-matched allograft recipients who received rabbit antithymocyte globulin (ATG) on different schedules (days -9 to -7 versus days -3 to -1). Monocyte as well as donor-derived T cell (ddCD3) recovery was superior in those given ATG early in the course of disease (days -9/-7). This difference was related to a more rapid rate of ddCD3 recovery, driven largely by CD3+/CD8+ cells in the first month post-transplantation. Early monocyte recovery was associated with later T cell recovery and improved survival. In contrast, rapid and early ddCD3 expansion out of proportion to monocyte recovery was associated with a high likelihood of acute GVHD and poor survival. This analytic methodology demonstrates that modeling "early-term immune reconstitution" following HCT yields insights that may be useful in the management of post-transplantation immunosuppression and adaptive cellular therapy to optimize clinical outcomes. © 2021 American Society for Transplantation and Cellular Therapy. Published by Elsevier Inc.
Collapse
Affiliation(s)
- Viktoriya Zelikson
- Department of Medicine, Virginia Commonwealth University, Richmond, Virginia
| | - Gary Simmons
- Department of Medicine, Virginia Commonwealth University, Richmond, Virginia
| | - Natasha Raman
- Department of Medicine, Virginia Commonwealth University, Richmond, Virginia
| | - Elizabeth Krieger
- Department of Pediatrics, Virginia Commonwealth University, Richmond, Virginia
| | - Anatevka Rebiero
- Department of Medicine, Virginia Commonwealth University, Richmond, Virginia
| | - Kelly Hawks
- Massey Cancer Center, School of Pharmacy, Virginia Commonwealth University, Richmond, Virginia
| | - May Aziz
- Massey Cancer Center, School of Pharmacy, Virginia Commonwealth University, Richmond, Virginia
| | - Catherine Roberts
- Department of Pediatrics, Virginia Commonwealth University, Richmond, Virginia
| | - Alden Chesney
- Department of Physics, Department of Pathology, Virginia Commonwealth University, Richmond, Virginia
| | - Jason Reed
- Experimental Transplant and Immunology Branch, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland
| | | | - Amir Toor
- Department of Medicine, Virginia Commonwealth University, Richmond, Virginia
| |
Collapse
|
4
|
Samuel M, Raman N. Comprehensive biological evaluation (DNA-binding, cleavage, and antimicrobial activity) of β-diketimine Schiff base ligands and their Cu(II) and Zn(II) complexes. J COORD CHEM 2021. [DOI: 10.1080/00958972.2021.1931848] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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)
- M. Samuel
- Research Department of Chemistry, VHNSN College, Virudhunagar, India
| | - N. Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar, India
| |
Collapse
|
5
|
Sakthivel A, Thangagiri B, Raman N, Joseph J, Guda R, Kasula M, Mitu L. Spectroscopic, SOD, anticancer, antimicrobial, molecular docking and DNA binding properties of bioactive VO(IV), Cu(II), Zn(II), Co(II), Mn(II) and Ni(II) complexes obtained from 3-(2-hydroxy-3-methoxybenzylidene)pentane-2,4-dione. J Biomol Struct Dyn 2020; 39:6500-6514. [PMID: 32794423 DOI: 10.1080/07391102.2020.1801508] [Citation(s) in RCA: 5] [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: 10/24/2022]
Abstract
Novel macrocyclic Schiff base complexes [[ML]X; where M = Cu(II), Co(II), Ni(II), Zn(II), Mn(II) and VO(IV); L = macrocyclic ligand; X = Cl2 and SO42-] have been synthesized and characterized by microanalytical, 1H, 13C NMR, IR, Mass, UV-Vis, EPR spectral studies, as well as conductivity data. All the complexes exhibit square-planar geometry except vanadium complex. Magnetic susceptibility measurements and high conductance data reveal the monomeric and electrolytic nature of the complexes. Electronic absorption, cyclic voltammetry, viscosity measurements have been carried out on the interaction of the complexes with DNA. The results suggest that the complexes bind to DNA by intercalation via the aromatic ring of the macrocycle into the base pairs of DNA. Using gel electrophoresis experiment in the presence and absence of oxidant (H2O2) the nuclease cleavage activity of the complexes has been performed on plasmid DNA. The results demonstrate that most of the complexes have promising superoxide dismutase (SOD)-mimetic activity. The in vitro cytotoxicity of ligand and its complexes has also been evaluated against human breast and colon carcinoma cells. Binding interactions and energies of ligand and its metal complexes [ML]2+ (M = VO(IV), Mn(II), Co(II), Ni(II), Cu(II), Zn(II)) against the receptors EGFR and HER2 are performed using the Auto dock module. Consequently, it is found that the ligand is strong inhibitor for EGFR and HER2 while [VOL]SO4 is good inhibitor for EGFR and [ZnL]Cl2 is moderate inhibitor for HER2. The antimicrobial activity of the ligand and its complexes against bacteria Salmonella typhi, Staphylococcus aureus, Escherichia coli and Bacillus subtilis and fungi Aspergillus niger, Aspergillus flavus, Candida Albicans and Rhizoctonia bataicola. The complexes have higher activities than the macrocyclic free Schiff base. Interaction of [VOL]SO4 to the binding sites of target protein EGFR (PDB ID: 4HJ0). Research HighlightsMacrocyclic Schiff base and its metal complexes were synthesized.Complexes bind to DNA by intercalation via the aromatic ring of the macrocycle into the base pairs of DNA.Vanadyl complex is a good inhibitor for EGFR.The complexes of copper, zinc and vanadium show efficient antitumor activity.Copper and vanadium complexes have superior antimicrobial activity than the standards.
Collapse
Affiliation(s)
- A Sakthivel
- Department of Chemistry, Mepco Schlenk Engineering College, Sivakasi, India
| | - B Thangagiri
- Department of Chemistry, Mepco Schlenk Engineering College, Sivakasi, India
| | - N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar, India
| | - J Joseph
- Department of Chemistry, Noorul Islam Centre for Higher Education, Kumaracoil, Tamil Nadu, India
| | - Ramu Guda
- Department of Chemistry, Kakatiya University, Warangal, India
| | - Mamatha Kasula
- Department of Chemistry, Kakatiya University, Warangal, India
| | - L Mitu
- Department of Nature Sciences, University of Pitesti, Pitesti, Romania
| |
Collapse
|
6
|
Kapoor R, Deek MP, McIntyre R, Raman N, Kummerlowe M, Chen I, Gaver M, Wang H, Denmeade S, Lotan T, Paller C, Markowski M, Carducci M, Eisenberger M, Beer TM, Song DY, DeWeese TL, Hearn JW, Greco S, DeVille C, Desai NB, Heath EI, Liauw S, Spratt DE, Hung AY, Antonarakis ES, Tran PT. A phase II randomized placebo-controlled double-blind study of salvage radiation therapy plus placebo versus SRT plus enzalutamide with high-risk PSA-recurrent prostate cancer after radical prostatectomy (SALV-ENZA). BMC Cancer 2019; 19:572. [PMID: 31196032 PMCID: PMC6567492 DOI: 10.1186/s12885-019-5805-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 06/06/2019] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND In men with a rising PSA following radical prostatectomy, salvage radiation therapy (SRT) offers a second chance for cure. Hormonal therapy can be combined with SRT in order to increase prostate tumor control, albeit with associated higher rates of treatment side effects. This trial studies the effectiveness of SRT combined with hormonal therapy using a more potent anti-androgen with a favorable side effect profile. Enzalutamide, a next generation selective androgen receptor antagonist, is approved by the Food and Drug Administration for the treatment of metastatic castrate-resistant prostate cancer (CRPC) where it has been shown to improve overall survival in combination with androgen deprivation therapy. The primary objective of this study is to evaluate the efficacy of combination SRT and enzalutamide for freedom-from-PSA-progression. Secondary objectives include time to local recurrence within the radiation field, metastasis-free survival and safety as determined by frequency and severity of adverse events. METHODS/DESIGN This is a randomized, double-blind, phase II, prospective, multicenter study in adult males with biochemically recurrent prostate cancer following radical prostatectomy. Following registration, enzalutamide 160 mg or placebo by mouth (PO) once daily will be administered for 6 months. Following two months of study drug, external beam radiotherapy to 66.6-70.2 Gray (Gy) will be administered to the prostate bed over 7-8 weeks while continuing daily placebo/enzalutamide. This is followed by two additional months of placebo/enzalutamide. DISCUSSION The SALV-ENZA trial is the first phase II placebo-controlled double-blinded randomized study to test SRT in combination with a next generation androgen receptor antagonist in men with high-risk recurrent prostate cancer after radical prostatectomy. The primary hypothesis of this study is that clinical outcomes will be improved by the addition of enzalutamide compared to standard-of-care SRT alone and pave the path for phase III evaluation of this combination. TRIAL REGISTRATIONS ClinicaltTrials.gov Identifier: NCT02203695 Date of Registration: 06/16/2014. Date of First Participant Enrollment: 04/16/2015.
Collapse
Affiliation(s)
- Roche Kapoor
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1550 Orleans Street, CRB2 Rm 406, Baltimore, MD 21231 USA
| | - Matthew P. Deek
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1550 Orleans Street, CRB2 Rm 406, Baltimore, MD 21231 USA
| | - Riley McIntyre
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1550 Orleans Street, CRB2 Rm 406, Baltimore, MD 21231 USA
| | - Natasha Raman
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1550 Orleans Street, CRB2 Rm 406, Baltimore, MD 21231 USA
| | - Megan Kummerlowe
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1550 Orleans Street, CRB2 Rm 406, Baltimore, MD 21231 USA
| | - Iyah Chen
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1550 Orleans Street, CRB2 Rm 406, Baltimore, MD 21231 USA
| | - Matt Gaver
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1550 Orleans Street, CRB2 Rm 406, Baltimore, MD 21231 USA
| | - Hao Wang
- Department of Medical Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1650 Orleans Street, CRB1 Rm 1M45, Baltimore, MD 21231 USA
| | - Sam Denmeade
- Department of Medical Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1650 Orleans Street, CRB1 Rm 1M45, Baltimore, MD 21231 USA
- The James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, MD USA
| | - Tamara Lotan
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD USA
| | - Channing Paller
- Department of Medical Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1650 Orleans Street, CRB1 Rm 1M45, Baltimore, MD 21231 USA
- The James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, MD USA
| | - Mark Markowski
- Department of Medical Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1650 Orleans Street, CRB1 Rm 1M45, Baltimore, MD 21231 USA
| | - Michael Carducci
- Department of Medical Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1650 Orleans Street, CRB1 Rm 1M45, Baltimore, MD 21231 USA
- The James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, MD USA
| | - Mario Eisenberger
- Department of Medical Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1650 Orleans Street, CRB1 Rm 1M45, Baltimore, MD 21231 USA
- The James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, MD USA
| | - Tomasz M. Beer
- OHSU Knight Cancer Institute, Oregon Health & Science University, Portland, OR USA
| | - Daniel Y. Song
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1550 Orleans Street, CRB2 Rm 406, Baltimore, MD 21231 USA
- Department of Medical Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1650 Orleans Street, CRB1 Rm 1M45, Baltimore, MD 21231 USA
- The James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, MD USA
| | - Theodore L. DeWeese
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1550 Orleans Street, CRB2 Rm 406, Baltimore, MD 21231 USA
- Department of Medical Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1650 Orleans Street, CRB1 Rm 1M45, Baltimore, MD 21231 USA
- The James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, MD USA
| | - Jason W. Hearn
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI USA
| | - Stephen Greco
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1550 Orleans Street, CRB2 Rm 406, Baltimore, MD 21231 USA
| | - Curtiland DeVille
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1550 Orleans Street, CRB2 Rm 406, Baltimore, MD 21231 USA
| | - Neil B. Desai
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX USA
| | - Elisabeth I. Heath
- Karmanos Cancer Institute, Department of Oncology, Wayne State University School of Medicine, Detroit, MI USA
| | - Stanley Liauw
- Department of Radiation Oncology and Cellular Oncology, University of Chicago, Chicago, IL USA
| | - Daniel E. Spratt
- Department of Radiation Oncology, University of Michigan, Ann Arbor, MI USA
| | - Arthur Y. Hung
- Department of Radiation Medicine, OHSU Knight Cancer Institute, Oregon Health & Science University, Portland, OR USA
| | - Emmanuel S. Antonarakis
- Department of Medical Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1650 Orleans Street, CRB1 Rm 1M45, Baltimore, MD 21231 USA
| | - Phuoc T. Tran
- Department of Radiation Oncology and Molecular Radiation Sciences, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1550 Orleans Street, CRB2 Rm 406, Baltimore, MD 21231 USA
- Department of Medical Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Hospital, 1650 Orleans Street, CRB1 Rm 1M45, Baltimore, MD 21231 USA
- The James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins University School of Medicine, Baltimore, MD USA
| |
Collapse
|
7
|
Affiliation(s)
- K. Natarajan
- Centre of Advanced Study in Botany, University of Madras, Madras-600 005, India
| | - N. Raman
- Centre of Advanced Study in Botany, University of Madras, Madras-600 005, India
| |
Collapse
|
8
|
Natarajan K, Raman N. South Indian Agaricales XIX—A New Species of Ripartites. Mycologia 2018. [DOI: 10.1080/00275514.1982.12021626] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- K. Natarajan
- Centre of Advanced Study in Botany, University of Madras, Madras—600 005, India
| | - N. Raman
- Centre of Advanced Study in Botany, University of Madras, Madras—600 005, India
| |
Collapse
|
9
|
Swarnavalli GCJ, Dinakaran S, Raman N, Jegadeesh R, Pereira C. Bio inspired synthesis of monodispersed silver nano particles using Sapindus emarginatus pericarp extract – Study of antibacterial efficacy. Journal of Saudi Chemical Society 2017. [DOI: 10.1016/j.jscs.2015.03.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
10
|
Arun T, Subramanian R, Raman N. Novel bio-essential metal based complexes linked by heterocyclic ligand: Synthesis, structural elucidation, biological investigation and docking analysis. J Photochem Photobiol B 2015; 154:67-76. [PMID: 26690017 DOI: 10.1016/j.jphotobiol.2015.11.011] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 11/06/2015] [Accepted: 11/10/2015] [Indexed: 11/30/2022]
Abstract
New series of bio-essential metal based complexes linked by Schiff base ligand (L) and 2,2'-bipyridine (bpy) have been synthesized and characterized by diverse spectral techniques such as elemental analysis, magnetic susceptibility, molar conductivity measurements, FT-IR, UV-Vis., (1)H NMR, (13)C NMR, EPR and Mass. The spectral data suggest that the metal complexes espouse octahedral geometry around the metal ions. Interactions of the complexes with CT DNA have been explored by electronic absorption, ethidium bromide displacement assay, viscosity measurements, cyclic voltammetry and differential pulse voltammetry in order to evaluate the possible DNA-binding mode and to calculate the corresponding DNA-binding constants. The DNA interaction studies propose that the intercalative mode of interaction and the complexes exhibit oxidative cleavage of pUC19 DNA in the presence of hydrogen peroxide as activator. The synthesized Schiff base ligand and its metal complexes have been screened for anti-microbial activity by micro dilution method against two Gram-positive bacteria (Staphylococcus aureus and Bacillus subtilis), two Gram-negative bacteria (Escherichia coli and Salmonella typhi) and three fungi strains (Fusarium solani, Aspergillus niger and Candida albicans) revealing that the complexes are good anti-pathogenic agents than the ligand. Moreover, molecular docking analysis has been performed to confirm the nature of binding of the complexes with DNA.
Collapse
Affiliation(s)
- T Arun
- Research Department of Chemistry, VHNSN College, Virudhunagar 626 001, Tamilnadu, India
| | - R Subramanian
- Centre for Scientific and Applied Research, PSN College of Engineering and Technology, Tirunelveli 627152, Tamilnadu, India
| | - N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar 626 001, Tamilnadu, India.
| |
Collapse
|
11
|
Packianathan S, Arun T, Raman N. DNA interaction and efficient antimicrobial activities of 4N chelating metal complexes. Journal of Photochemistry and Photobiology B: Biology 2015; 148:160-167. [DOI: 10.1016/j.jphotobiol.2015.04.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 03/30/2015] [Accepted: 04/12/2015] [Indexed: 01/22/2023]
|
12
|
Arun T, Packianathan S, Malarvizhi M, Antony R, Raman N. Bio-relevant complexes of novel N2O2 type heterocyclic ligand: Synthesis, structural elucidation, biological evaluation and docking studies. J Photochem Photobiol B 2015; 149:93-102. [PMID: 26057019 DOI: 10.1016/j.jphotobiol.2015.05.022] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Revised: 05/27/2015] [Accepted: 05/28/2015] [Indexed: 01/20/2023]
Abstract
Organic and inorganic entities [Cu(II), Co(II), Ni(II) and Zn(II)] have been bridged by N2O2 type heterocyclic imine (CN) ligand for the synthesis of novel organic-inorganic bridged complexes of the type [M(H2L)]. The synthesized complexes were characterized by spectral techniques such as FT-IR, UV-visible, (1)H NMR, (13)C NMR, EPR, ESI-Mass, elemental analysis, magnetic susceptibility and molar conductivity measurements. The metal complexes adopt square planar geometrical arrangement around the metal ions. DNA binding ability of these complexes has been explored by different techniques viz. electronic absorption, fluorescence, cyclic voltammetry, differential pulse voltammetry and viscosity measurements. These studies prove that CT DNA interaction of the complexes follows intercalation mode. The oxidative cleavage of the complexes with pUC19 DNA has been investigated by gel electrophoresis. Molecular docking calculations have been performed to understand the nature of binding of the complexes with DNA. Moreover, the anti-pathogenic actions of the complexes were tested in vitro against few bacteria and fungi by disk diffusion method. The data reveal that the complexes have higher anti-pathogenic activity than the ligand.
Collapse
Affiliation(s)
- T Arun
- Research Department of Chemistry, VHNSN College, Virudhunagar 626 001, Tamil Nadu, India
| | - S Packianathan
- Research Department of Chemistry, VHNSN College, Virudhunagar 626 001, Tamil Nadu, India
| | - M Malarvizhi
- Research Department of Chemistry, VHNSN College, Virudhunagar 626 001, Tamil Nadu, India
| | - R Antony
- Organometallics and Materials Chemistry Lab, IIT-Bombay, Powai, Mumbai 400076, India
| | - N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar 626 001, Tamil Nadu, India.
| |
Collapse
|
13
|
Subbaraj P, Ramu A, Raman N, Dharmaraja J. Synthesis, characterization, DNA interaction and pharmacological studies of substituted benzophenone derived Schiff base metal(II) complexes. Journal of Saudi Chemical Society 2015. [DOI: 10.1016/j.jscs.2014.05.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
14
|
Subbaraj P, Ramu A, Raman N, Dharmaraja J. Synthesis, characterization, and pharmacological aspects of metal(II) complexes incorporating 4-[phenyl(phenylimino)methyl]benzene-1,3-diol. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.950256] [Citation(s) in RCA: 9] [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: 01/18/2023]
Affiliation(s)
- P. Subbaraj
- Department of Chemistry, Devanga Arts College, Aruppukottai, India
| | - A. Ramu
- Department of Inorganic Chemistry, School of Chemistry, Madurai Kamaraj University, Madurai, India
| | - N. Raman
- Research Department of Chemistry, V.H.N.S.N. College, Virudhunagar, India
| | - J. Dharmaraja
- Department of Science and Humanities, Sree Sowdambika College of Engineering, Aruppukottai, India
| |
Collapse
|
15
|
Raman N, Sakthivel A, Pravin N. Exploring DNA binding and nucleolytic activity of few 4-aminoantipyrine based amino acid Schiff base complexes: a comparative approach. Spectrochim Acta A Mol Biomol Spectrosc 2014; 125:404-413. [PMID: 24566120 DOI: 10.1016/j.saa.2014.01.108] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [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: 10/28/2013] [Revised: 01/20/2014] [Accepted: 01/22/2014] [Indexed: 06/03/2023]
Abstract
A series of novel Co(II), Cu(II), Ni(II) and Zn(II) complexes were synthesized from Schiff base(s), obtained by the condensation of 4-aminoantipyrine with furfural and amino acid (glycine(L1)/alanine(L2)/valine(L3)) and respective metal(II) chloride. Their structural features and other properties were explored from the analytical and spectral methods. The binding behaviors of the complexes to calf thymus DNA were investigated by absorption spectra, viscosity measurements and cyclic voltammetry. The intrinsic binding constants for the above synthesized complexes are found to be in the order of 10(2) to 10(5) indicating that most of the synthesized complexes are good intercalators. The binding constant values (Kb) clearly indicate that valine Schiff-base complexes have more intercalating ability than alanine and glycine Schiff-base complexes. The results indicate that the complexes bind to DNA through intercalation and act as efficient cleaving agents. The in vitro antibacterial and antifungal assay indicates that these complexes are good antimicrobial agents against various pathogens. The IC50 values of [Ni(L1)2] and [Zn(L1)2] complexes imply that these complexes have preferable ability to scavenge hydroxyl radical.
Collapse
Affiliation(s)
- N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar 626 001, Tamil Nadu, India.
| | - A Sakthivel
- Research Department of Chemistry, VHNSN College, Virudhunagar 626 001, Tamil Nadu, India
| | - N Pravin
- Research Department of Chemistry, VHNSN College, Virudhunagar 626 001, Tamil Nadu, India
| |
Collapse
|
16
|
Raman N, Sakthivel A, Raja JD, Rajasekaran K. Designing, Structural Elucidation and Comparison of the Cleavage Ability of Metal Complexes Containing Tetradentate Schiff Bases 1. RUSS J INORG CHEM+ 2014. [DOI: 10.1134/s0036023608020113] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
17
|
Nataraja Moorthy T, Mostapa AMB, Boominathan R, Raman N. Stature estimation from footprint measurements in Indian Tamils by regression analysis. Egyptian Journal of Forensic Sciences 2014. [DOI: 10.1016/j.ejfs.2013.10.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
|
18
|
Prabhu JS, Korlimarla A, Desai K, Alexander A, Raghavan R, Anupama C, Dendukuri N, Manjunath S, Correa M, Raman N, Kalamdani A, Prasad M, Gopinath KS, Srinath BS, Sridhar TS. A Majority of Low (1-10%) ER Positive Breast Cancers Behave Like Hormone Receptor Negative Tumors. J Cancer 2014; 5:156-65. [PMID: 24563670 PMCID: PMC3930907 DOI: 10.7150/jca.7668] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [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] [Received: 09/14/2013] [Accepted: 12/09/2013] [Indexed: 01/22/2023] Open
Abstract
Background: The 2010 guidelines by ASCO-CAP have mandated that breast cancer specimens with ≥1% positively staining cells by immunohistochemistry should be considered Estrogen Receptor (ER) positive. This has led to a subclass of low-ER positive (1-10%) breast cancers. We have examined the biology and clinical behavior of these low ER staining tumors. Methods: We have developed a probabilistic score of the “ER-positivity” by quantitative estimation of ER related gene transcripts from FFPE specimens. Immunohistochemistry for ER was done on 240 surgically excised tumors of primary breast cancer. Relative transcript abundance of 3 house-keeping genes and 6 ER related genes were determined by q-RT PCR. A logistic regression model using 3 ER associated genes provided the best probability function, and a cut-off value was derived by ROC analysis. 144 high ER (>10%), 75 ER negative and 21 low-ER (1-10%) tumors were evaluated using the probability score and the disease specific survival was compared. Results: Half of the low-ER positive tumors were assigned to the ER negative group based on the probability score; in contrast 95% of ER negative and 92% of the high ER positive tumors were assigned to the appropriate ER group (p<0.0001). The survival of the low-ER group was intermediate between that of the high ER positive and ER negative groups (p<0.05). Conclusion: Our results suggest that the newly lowered ASCO-CAP criteria for ER positivity, leads to the false categorization of biologically ER negative tumors as ER positive ones. This may have particular relevance to India, where we have a much higher proportion of ER negative tumors in general.
Collapse
Affiliation(s)
- Jyothi S Prabhu
- 1. Division of Molecular Medicine, St. John's Research Institute, Bangalore, India
| | - Aruna Korlimarla
- 1. Division of Molecular Medicine, St. John's Research Institute, Bangalore, India
| | - Krisha Desai
- 1. Division of Molecular Medicine, St. John's Research Institute, Bangalore, India
| | - Annie Alexander
- 1. Division of Molecular Medicine, St. John's Research Institute, Bangalore, India
| | - Rohini Raghavan
- 1. Division of Molecular Medicine, St. John's Research Institute, Bangalore, India
| | - Ce Anupama
- 1. Division of Molecular Medicine, St. John's Research Institute, Bangalore, India
| | - Nandini Dendukuri
- 3. Department of Medicine, McGill University, Montreal, Quebec, Canada, Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, Quebec, Canada
| | - Suraj Manjunath
- 2. Department of Surgical Oncology, St. John's Medical College and Hospital, Bangalore, India
| | - Marjorrie Correa
- 4. Department of Pathology, St. John's Medical College and Hospital, Bangalore, India
| | - N Raman
- 5. Rangadore Memorial Hopsital, Bangalore, India
| | | | - Msn Prasad
- 5. Rangadore Memorial Hopsital, Bangalore, India
| | - K S Gopinath
- 5. Rangadore Memorial Hopsital, Bangalore, India
| | - B S Srinath
- 6. Shankara Cancer Hospital and Research Centre, Bangalore, India
| | - T S Sridhar
- 1. Division of Molecular Medicine, St. John's Research Institute, Bangalore, India
| |
Collapse
|
19
|
Subbaraj P, Ramu A, Raman N, Dharmaraja J. Novel mixed ligand complexes of bioactive Schiff base (E)-4-(phenyl (phenylimino) methyl) benzene-1,3-diol and 2-aminophenol/2-aminobenzoic acid: synthesis, spectral characterization, antimicrobial and nuclease studies. Spectrochim Acta A Mol Biomol Spectrosc 2014; 117:65-71. [PMID: 23981416 DOI: 10.1016/j.saa.2013.07.096] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [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: 03/01/2013] [Revised: 07/22/2013] [Accepted: 07/31/2013] [Indexed: 06/02/2023]
Abstract
A novel bidentate Schiff base ligand has been synthesized using 2,4-dihydroxybenzophenone and aniline. Its mixed ligand complexes of MAB type [M=Mn(II), Co(II), Ni(II), Cu(II) and Zn(II); HA=Schiff base and B=2-aminophenol/2-aminobenzoic acid] have been synthesized and characterized on the basis of spectral data UV-Vis, IR, (1)H NMR, FAB-Mass, EPR, SEM and magnetic studies. All the complexes were soluble in DMF and DMSO. Elemental analysis and molar conductance values indicate that the complexes are non-electrolytes. HA binds with M(II) ions through azomethine and deprotonated phenolic group and B binds through the primary amine group and deprotonated phenolic/carboxylic groups. Using FAB-Mass the cleavage pattern of the ligand (HA) has been established. All the complexes adopt octahedral geometry around the metal ions. It has been confirmed with the help of UV-Vis, IR, (1)H NMR and FAB-Mass spectral data. DNA binding activities of the complexes 1d and 2d are studied by UV-Vis spectroscopy and cleavage studies of Schiff base ligand and its complexes 1d and 2d have been by agarose gel electrophoresis method. In vitro biological activities of the free ligand (HA) and their metal complexes (1a-1e and 2a-2e) were screened against few bacteria, Escherichia coli, Staphylococcus saphyphiticus, Staphylococcus aureus, Pseudomonas aeruginosa and fungi Aspergillus niger, Enterobacter species, Candida albicans by well diffusion technique.
Collapse
Affiliation(s)
- P Subbaraj
- Department of Chemistry, Devanga Arts College, Aruppukottai 626 101, Tamil Nadu, India
| | | | | | | |
Collapse
|
20
|
Raghavan R, Alexander A, Prabhu J, Korlimarla A, Correa M, Raman N, Prasad MSN, Manjunath S, Shivananda S, Gopinath KS, Srinath BS, Sridhar TS. Abstract P6-08-12: Gains in women’s education has not led to commensurate gains in seeking health-care early in breast cancer patients in urban India. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p6-08-12] [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: 11/16/2022]
Abstract
Abstract
Introduction:
Breast cancer is the leading cancer diagnosed in urban Indian women. Historically the proportion of women presenting with advanced disease has been in excess of 50% at most regional cancer centres. The past 20 years has witnessed rapid economic growth and urbanization with significant gains in women's education and access to health. However, it is not clear if this has translated to earlier seeking of care in the educated.
The aim of this study was to examine if higher education (College) was a determinant in the time of seeking first medical consultation, and whether there were significant differences between women under the age of 40 versus women over 60 years old at the time of diagnosis.
Methods:
The data for analysis were obtained from a prospective longitudinal observational study conducted between 2008-2013 at a medical teaching hospital and a tertiary specialized cancer care centre. A total of 460 patients have been enrolled so far. All patients provided informed consent and the study has been reviewed and approved by the institutional ethics committees at these institutions. We have collected from the patients and their medical records information about their age at diagnosis, educational level, stage of disease, histopathology reports and clinical details.
Results:
Data from 194 patients have been used for the analysis. Patients were divided into one group of < = 40Y of age (Group I, N = 58) and the second of > = 60 years of age (Group II, N = 136). Mean age at presentation for the groups was 35 and 68 years respectively. As expected almost 1.5 times as many women under the age of 40 (36%) were college educated compared to the women over 60 (22%) (p = 0.05). The proportion of LABC in the two groups was not different with group I having 27% and group II 25%. The proportion of older women with LABC and a college degree was 20%. However, rather than the expected decrease in proportion of women with high education and LABC, 31% of young women with LABC had a college degree. LABC in the college educated was not different in the group I when compared to group II. (p = 0.39).
Conclusion:
The determinants of seeking health care are complex and influenced by a variety of factors including socio-economic status, access to health care, education, cultural beliefs, and personal preferences. While urban India's steady economic growth has been highlighted by the scholarly as well as the lay press, the data presented here suggest that there is not an automatic and linear transfer between education, economics and healthcare seeking behaviours. We suggest that while a lot of attention has been paid to awareness and screening, we may need to focus on local cultural factors, and perhaps provide support from female counsellors and care providers as critical components of attempting to bring our women to the hospital at the earliest.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P6-08-12.
Collapse
Affiliation(s)
- R Raghavan
- St. John's Research Institution, Bangalore, Karnataka, India; St. John's Medical College & Hospital, Bangalore, Karnataka, India; St. John's Medical College, Bangalore, Karnataka, India; Sri Shankara Cancer Hospital & Research Centre, Bangalore, Karnataka, India; Sri Rangadore Memorial Hospital, Bangalore, Karnataka, India
| | - A Alexander
- St. John's Research Institution, Bangalore, Karnataka, India; St. John's Medical College & Hospital, Bangalore, Karnataka, India; St. John's Medical College, Bangalore, Karnataka, India; Sri Shankara Cancer Hospital & Research Centre, Bangalore, Karnataka, India; Sri Rangadore Memorial Hospital, Bangalore, Karnataka, India
| | - J Prabhu
- St. John's Research Institution, Bangalore, Karnataka, India; St. John's Medical College & Hospital, Bangalore, Karnataka, India; St. John's Medical College, Bangalore, Karnataka, India; Sri Shankara Cancer Hospital & Research Centre, Bangalore, Karnataka, India; Sri Rangadore Memorial Hospital, Bangalore, Karnataka, India
| | - A Korlimarla
- St. John's Research Institution, Bangalore, Karnataka, India; St. John's Medical College & Hospital, Bangalore, Karnataka, India; St. John's Medical College, Bangalore, Karnataka, India; Sri Shankara Cancer Hospital & Research Centre, Bangalore, Karnataka, India; Sri Rangadore Memorial Hospital, Bangalore, Karnataka, India
| | - M Correa
- St. John's Research Institution, Bangalore, Karnataka, India; St. John's Medical College & Hospital, Bangalore, Karnataka, India; St. John's Medical College, Bangalore, Karnataka, India; Sri Shankara Cancer Hospital & Research Centre, Bangalore, Karnataka, India; Sri Rangadore Memorial Hospital, Bangalore, Karnataka, India
| | - N Raman
- St. John's Research Institution, Bangalore, Karnataka, India; St. John's Medical College & Hospital, Bangalore, Karnataka, India; St. John's Medical College, Bangalore, Karnataka, India; Sri Shankara Cancer Hospital & Research Centre, Bangalore, Karnataka, India; Sri Rangadore Memorial Hospital, Bangalore, Karnataka, India
| | - MSN Prasad
- St. John's Research Institution, Bangalore, Karnataka, India; St. John's Medical College & Hospital, Bangalore, Karnataka, India; St. John's Medical College, Bangalore, Karnataka, India; Sri Shankara Cancer Hospital & Research Centre, Bangalore, Karnataka, India; Sri Rangadore Memorial Hospital, Bangalore, Karnataka, India
| | - S Manjunath
- St. John's Research Institution, Bangalore, Karnataka, India; St. John's Medical College & Hospital, Bangalore, Karnataka, India; St. John's Medical College, Bangalore, Karnataka, India; Sri Shankara Cancer Hospital & Research Centre, Bangalore, Karnataka, India; Sri Rangadore Memorial Hospital, Bangalore, Karnataka, India
| | - S Shivananda
- St. John's Research Institution, Bangalore, Karnataka, India; St. John's Medical College & Hospital, Bangalore, Karnataka, India; St. John's Medical College, Bangalore, Karnataka, India; Sri Shankara Cancer Hospital & Research Centre, Bangalore, Karnataka, India; Sri Rangadore Memorial Hospital, Bangalore, Karnataka, India
| | - KS Gopinath
- St. John's Research Institution, Bangalore, Karnataka, India; St. John's Medical College & Hospital, Bangalore, Karnataka, India; St. John's Medical College, Bangalore, Karnataka, India; Sri Shankara Cancer Hospital & Research Centre, Bangalore, Karnataka, India; Sri Rangadore Memorial Hospital, Bangalore, Karnataka, India
| | - BS Srinath
- St. John's Research Institution, Bangalore, Karnataka, India; St. John's Medical College & Hospital, Bangalore, Karnataka, India; St. John's Medical College, Bangalore, Karnataka, India; Sri Shankara Cancer Hospital & Research Centre, Bangalore, Karnataka, India; Sri Rangadore Memorial Hospital, Bangalore, Karnataka, India
| | - TS Sridhar
- St. John's Research Institution, Bangalore, Karnataka, India; St. John's Medical College & Hospital, Bangalore, Karnataka, India; St. John's Medical College, Bangalore, Karnataka, India; Sri Shankara Cancer Hospital & Research Centre, Bangalore, Karnataka, India; Sri Rangadore Memorial Hospital, Bangalore, Karnataka, India
| |
Collapse
|
21
|
Raman N, Janse van Rensburg AB. Clinical and psycho-social profile of child and adolescent mental health care users and services at an urban child mental health clinic in South Africa. Afr J Psychiatry (Johannesbg) 2013; 16:356-63. [PMID: 24051669 DOI: 10.4314/ajpsy.v16i5.48] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Accepted: 09/28/2012] [Indexed: 11/17/2022]
Abstract
OBJECTIVE National and international child and adolescent mental healthcare policy and action advocate that the health and well being of children should be increasingly given greater attention. The purpose of this study was to describe the demographic, socio economic and clinical profile of the users at the child and adolescent mental health clinic of the Rahima Moosa Mother and Child Hospital (RMMCH). METHOD A descriptive, retrospective clinical audit from users' clinical files was performed over a one-year period from January to December 2007. Descriptive statistical analyses of demographic and socio-economic variables were made and these variables were compared with the presenting clinical problems. Odds ratios were calculated for variables that showed a statistically significant association (p-value less than 0.05). RESULTS A total of 303 users attended this clinic. Statistical comparisons between demographic data and disorders revealed that being male increased the likelihood of presenting with AHDH and disruptive behaviour disorders; being female increased the likelihood of being sexually abused. Race showed a significant association with parent-child relationship difficulties. Regarding socio-economic variables, the identity of the caregiver of the child influenced the risk of disruptive behaviour disorders, sexual abuse, neglect and academic problems. Where the child was placed was a risk factor for disruptive behaviour disorders, sexual abuse, neglect and academic problems. Whether the mother of a user was alive or deceased, was found to be related to ADHD and disruptive behaviour and whether the father of a user was alive or deceased, was found to be related to sexual abuse and academic problems. The education level of the caregiver showed a significant association with sexual abuse, neglect and academic problems; the marital status of the parent (widowed mother) showed a significant association with bereavement. Household income was associated with sexual abuse, neglect and academic problems. CONCLUSION This study demonstrated the impact that socio-economic circumstances have on the prevalence of childhood disorders; hence the urgent need for government and social welfare departments to improve the socio-economic status of communities. There is a need to improve psychiatric services for the population served by this hospital, including more clinics in its catchment area, as well as child psychiatry training posts and extended social work services.
Collapse
Affiliation(s)
- N Raman
- Division of Psychiatry, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | | |
Collapse
|
22
|
Raman N, Sobha S, Mitu L. Design, synthesis, DNA binding ability, chemical nuclease activity and antimicrobial evaluation of Cu(II), Co(II), Ni(II) and Zn(II) metal complexes containing tridentate Schiff base. Journal of Saudi Chemical Society 2013. [DOI: 10.1016/j.jscs.2011.03.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
23
|
Raman N, Jeyamurugan R, Sudharsan S, Karuppasamy K, Mitu L. Metal based pharmacologically active agents: Synthesis, structural elucidation, DNA interaction, in vitro antimicrobial and in vitro cytotoxic screening of copper(II) and zinc(II) complexes derived from amino acid based pyrazolone derivatives. ARAB J CHEM 2013. [DOI: 10.1016/j.arabjc.2012.04.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
|
24
|
Sudharsan S, Raman N, Senthilkumar R. In vitro antitumor assessments of peptide nanocomplexes on Dalton's lymphoma ascites tumor model. Mater Sci Eng C Mater Biol Appl 2013; 33:884-91. [PMID: 25427502 DOI: 10.1016/j.msec.2012.11.016] [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] [Received: 09/28/2011] [Revised: 09/02/2012] [Accepted: 11/11/2012] [Indexed: 11/15/2022]
Abstract
This research work reports the in vitro antitumor personality of few novel peptide nanocomplexes synthesized via a phase-assisted, modified Brust-Schiffrin methodology. Here, a series of metallo(copper, cobalt, nickel and zinc) nanocomplexes engineered with a pre-prepared peptide [N,N'-(1,2-ethylene)-bis-hippuricamide] have been synthesized for damaging the Dalton's lymphoma ascites tumor model. All the peptide nanocomplexes are spectrally, thermally and morphologically examined. The peptide bound zinc and cobalt nanocomplexes deliver excellent antitumor behavior against both the animal and human cancer cell lines, which has been pre-documented by their efficient DNA damaging skills under physiological conditions. Additionally, all the nanocomplexes are evaluated for the inhibition of microbial augmentation against few fungal and bacterial strains. The above results demonstrate that, a consecutive development of these kinds of peptide nanocomplexes may exemplify their uniqueness in biomedical applications as useful molecular-level devices.
Collapse
Affiliation(s)
- S Sudharsan
- Research Department of Chemistry, VHNSN College, Virudhunagar, 626 001, India
| | - N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar, 626 001, India.
| | - R Senthilkumar
- Department of Pharmaceutical Chemistry, Swami Vivekanandha College of Pharmacy, Elayampalayam, Tiruchengodu, 637 205, India
| |
Collapse
|
25
|
Raman N, Sudharsan S, Veerakumar V, Pravin N, Vithiya K. Pithecellobium dulce mediated extra-cellular green synthesis of larvicidal silver nanoparticles. Spectrochim Acta A Mol Biomol Spectrosc 2012; 96:1031-1037. [PMID: 22947646 DOI: 10.1016/j.saa.2012.08.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Revised: 06/30/2012] [Accepted: 08/08/2012] [Indexed: 06/01/2023]
Abstract
Present study reports a green chemistry approach for the biological synthesis of silver nanoparticles using the aqueous leaf extract of Pithecellobium dulce, which acts as a reducing and capping agent. It is observed that use of P. dulce leaf extract makes a fast, environmentally benign and convenient method for the synthesis of silver nanoparticles and can reduce silver ions into silver nanoparticles. Silver nanoparticles so prepared have been characterized by UV-Vis, FT-IR, X-ray diffraction, atomic force microscopy and scanning electron microscope studies. Furthermore, these nanoparticles show effective larvicidal activity against Culex quinquefasciatus (LC(50)=21.56 mg/L and r(2)=0.995) due to high surface to volume ratio.
Collapse
Affiliation(s)
- N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar 626 001, India.
| | | | | | | | | |
Collapse
|
26
|
Raman N, Sudharsan S, Pothiraj K. Synthesis and structural reactivity of inorganic–organic hybrid nanocomposites – A review. Journal of Saudi Chemical Society 2012. [DOI: 10.1016/j.jscs.2011.01.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
27
|
Raman N, Sobha S, Selvaganapathy M, Mahalakshmi R. DNA binding mode of novel tetradentate amino acid based 2-hydroxybenzylidene-4-aminoantipyrine complexes. Spectrochim Acta A Mol Biomol Spectrosc 2012; 96:698-708. [PMID: 22885083 DOI: 10.1016/j.saa.2012.07.051] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Revised: 06/29/2012] [Accepted: 07/11/2012] [Indexed: 06/01/2023]
Abstract
Few transition metal complexes of tetradentate N(2)O(2) donor Schiff base ligands containing 2-hydroxybenzylidene-4-aminoantipyrine and amino acids (alanine/valine) abbreviated to KHL(1)/KHL(2) have been synthesized. All the metal complexes have been fully characterized with the help of elemental analyses, molecular weights, molar conductance values, magnetic moments and spectroscopic data. The Schiff bases KHL(1)/KHL(2) are found to act as tetradentate ligands using N(2)O(2) donor set of atoms leading to a square-planar geometry for the complexes around the metal ions. The binding behaviors of the complexes to calf thymus DNA have been investigated by absorption spectra, viscosity measurements and cyclic voltammetry. The DNA binding constants reveal that all these complexes interact with DNA through minor groove binding mode. The studies on mechanism of photocleavage reveal that singlet oxygen ((1)O(2)) and superoxide anion radical (O(2)(-)) may play an important role in the photocleavage. The Schiff bases and their metal complexes have been screened for their in vitro antibacterial activities against Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, Staphylococcus epidermidis, Klebsiella pneumoniae and antifungal activities against Aspergillus niger, Fusarium solani, Culvularia lunata, Rhizoctonia bataicola and Candida albicans by MIC method.
Collapse
Affiliation(s)
- N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar 626 001, India.
| | | | | | | |
Collapse
|
28
|
Sobha S, Mahalakshmi R, Raman N. Studies on DNA binding behaviour of biologically active transition metal complexes of new tetradentate N2O2 donor Schiff bases: inhibitory activity against bacteria. Spectrochim Acta A Mol Biomol Spectrosc 2012; 92:175-183. [PMID: 22446764 DOI: 10.1016/j.saa.2012.02.063] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Revised: 02/09/2012] [Accepted: 02/17/2012] [Indexed: 05/31/2023]
Abstract
A series of Cu(II), Ni(II) and Zn(II) complexes of the type ML have been synthesized with Schiff bases derived from o-acetoacetotoluidide, 2-hydroxybenzaldehyde and o-phenylenediamine/1,4-diaminobutane. The complexes are insoluble in common organic solvents but soluble in DMF and DMSO. The measured molar conductance values in DMSO indicate that the complexes are non-electrolytic in nature. All the six metal complexes have been fully characterized with the help of elemental analyses, molecular weights, molar conductance values, magnetic moments and spectroscopic data. The analytical data helped to elucidate the structure of the metal complexes. The Schiff bases are found to act as tetradentate ligands using N(2)O(2) donor set of atoms leading to a square-planar geometry for the complexes around all the metal ions. The binding properties of metal complexes with DNA were investigated by absorption spectra, viscosity measurements and cyclic voltammetry. Detailed analysis reveals that the metal complexes intercalate into the DNA base stack as intercalators. All the metal complexes cleave the pUC19 DNA in presence of H(2)O(2.) The Schiff bases and their complexes have been screened for their antibacterial activity against five bacterial strains (Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, Staphylococcus epidermidis, Klebsiella pneumoniae) by disk diffusion method. All the metal complexes have potent biocidal activity than the free ligands.
Collapse
Affiliation(s)
- S Sobha
- Research Department of Chemistry, VHNSN College, Virudhunagar, India
| | | | | |
Collapse
|
29
|
Raman N, Ravichandran S. Synthesis and Characterization of a New Schiff Base and its Metal Complexes Derived from the Mannich Base, N-(1-piperidinobenzyl)acetamide. ACTA ACUST UNITED AC 2012. [DOI: 10.1081/sim-200066974] [Citation(s) in RCA: 7] [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: 11/03/2022]
Affiliation(s)
- N. Raman
- a Department of Chemistry , Virudhunagar Hindu Nadars' Senthi Kumar Nadar College , Virudhunagar , India
| | - S. Ravichandran
- a Department of Chemistry , Virudhunagar Hindu Nadars' Senthi Kumar Nadar College , Virudhunagar , India
| |
Collapse
|
30
|
Raman N, Sobha S. Exploring the DNA binding mode of transition metal based biologically active compounds. Spectrochim Acta A Mol Biomol Spectrosc 2012; 85:223-234. [PMID: 22020164 DOI: 10.1016/j.saa.2011.09.065] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Revised: 09/06/2011] [Accepted: 09/30/2011] [Indexed: 05/31/2023]
Abstract
Few novel 4-aminoantipyrine derived Schiff bases and their metal complexes were synthesized and characterized. Their structural features and other properties were deduced from the elemental analysis, magnetic susceptibility and molar conductivity as well as from mass, IR, UV-vis, (1)H NMR and EPR spectral studies. The binding of the complexes with CT-DNA was analyzed by electronic absorption spectroscopy, viscosity measurement, and cyclic voltammetry. The interaction of the metal complexes with DNA was also studied by molecular modeling with special reference to docking. The experimental and docking results revealed that the complexes have the ability of interaction with DNA of minor groove binding mode. The intrinsic binding constants (K(b)) of the complexes with CT-DNA were found out which show that they are minor groove binders. Gel electrophoresis assay demonstrated the ability of the complexes to cleave the pUC19 DNA in the presence of AH(2) (ascorbic acid). Moreover, the oxidative cleavage studies using distamycin revealed the minor groove binding for the newly synthesized 4-aminoantipyrine derived Schiff bases and their metal complexes. Evaluation of antibacterial activity of the complexes against Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, Staphylococcus epidermidis, and Klebsiella pneumoniae exhibited that the complexes have potent biocidal activity than the free ligands.
Collapse
Affiliation(s)
- N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar 626 001, India.
| | | |
Collapse
|
31
|
Raman N, Sudharsan S. Phase-assisted synthesis and DNA unpacking evaluation of biologically inspired metallo nanocomplexes using peptide as unique building block. J Colloid Interface Sci 2011; 364:140-7. [DOI: 10.1016/j.jcis.2011.08.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Revised: 08/12/2011] [Accepted: 08/13/2011] [Indexed: 11/24/2022]
|
32
|
Raman N, Pothiraj K, Baskaran T. Synthesis, characterization, and DNA damaging of bivalent metal complexes incorporating tetradentate dinitrogen–dioxygen ligand as potential biocidal agents. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.638979] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- N. Raman
- a Research Department of Chemistry , VHNSN College , Virudhunagar 626 001 , Tamil Nadu , India
| | - K. Pothiraj
- a Research Department of Chemistry , VHNSN College , Virudhunagar 626 001 , Tamil Nadu , India
| | - T. Baskaran
- a Research Department of Chemistry , VHNSN College , Virudhunagar 626 001 , Tamil Nadu , India
| |
Collapse
|
33
|
Raman N, Pothiraj K, Baskaran T. DNA-binding, oxidative DNA cleavage, and coordination mode of later 3d transition metal complexes of a Schiff base derived from isatin as antimicrobial agents. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.634005] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- N. Raman
- a Research Department of Chemistry , VHNSN College , Virudhunagar – 626001, India
| | - K. Pothiraj
- a Research Department of Chemistry , VHNSN College , Virudhunagar – 626001, India
| | - T. Baskaran
- a Research Department of Chemistry , VHNSN College , Virudhunagar – 626001, India
| |
Collapse
|
34
|
Raman N, Selvan A, Sudharsan S. Metallation of ethylenediamine based Schiff base with biologically active Cu(II), Ni(II) and Zn(II) ions: synthesis, spectroscopic characterization, electrochemical behaviour, DNA binding, photonuclease activity and in vitro antimicrobial efficacy. Spectrochim Acta A Mol Biomol Spectrosc 2011; 79:873-883. [PMID: 21550840 DOI: 10.1016/j.saa.2011.03.017] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 02/17/2011] [Accepted: 03/09/2011] [Indexed: 05/30/2023]
Abstract
A new ligand [C28H20N6O8] (L2) has been synthesized by the condensation reaction of 3-hydroxy-4-nitrobenzaldehydenephenylhydrazine (L1) with diethyloxalate. This ligand L2 is allowed to react with bis(ethylenediamine)Cu(II)/Ni(II)/Zn(II) complexes. It affords [(L2)Cu(en)2]Cl2(1)/[(L2)Ni(en)2]Cl2(2)/[(L2)Zn(en)2]Cl2(3) complexes, respectively. These complexes (1-3) have been characterized by the spectral and analytical techniques. The interaction of these complexes with calf thymus (CT) DNA is characterized by the absorption spectra which exhibit a slight red shift with hypochromic effect. Electrochemical analyses and viscosity measurements have also been carried out to determine the mode of binding. The shift in ΔEp, E1/2 and Ipc values explores the interaction of CT DNA with the above metal complexes. The slight increase in the viscosity of CT DNA indicates that these complexes bind to CT DNA through a partial non-classical intercalative mode. Cleavage experiments using pBR322 DNA in presence of H2O2 indicate that these complexes behave as efficient artificial chemical nucleases in the order of 1>2>3. Moreover, the antibacterial and antifungal studies reveal that complex 1 is highly active against the bacterial and fungal growth.
Collapse
Affiliation(s)
- N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar, Tamil Nadu 626 001, India.
| | | | | |
Collapse
|
35
|
Monsen K, Melton-Meaux G, Timm J, Westra B, Kerr M, Raman N, Farri O, Hart C, Martin K. An empiric analysis of omaha system targets. Appl Clin Inform 2011; 2:317-30. [PMID: 23616878 PMCID: PMC3631930 DOI: 10.4338/aci-2010-12-ra-0076] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [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: 03/21/2011] [Accepted: 06/15/2011] [Indexed: 11/23/2022] Open
Abstract
Interface terminologies used in electronic health records must be re-evaluated and revised to reflect current health care practice and knowledge. To enable future revisions of the Omaha System Intervention Scheme, investigators evaluated formal semantic structure of target terms and concept duplication of problem and target terms. Using linguistic principles and qualitative analysis, five themes were found. A multidimensional formal semantic structure for the intervention target term was proposed. Concept duplication was examined for 16 problem-target matches. Clinical data enabled assessment of the validity of a proposed formal semantic structure and concept duplication. Recommendations are suggested for future development of the Omaha System Intervention Scheme.
Collapse
Affiliation(s)
- K. Monsen
- University of Minnesota School of Nursing;
| | | | - J. Timm
- Washington County Minnesota Department of Public Health and Environment;
| | | | - M. Kerr
- University of Minnesota School of Nursing;
| | - N. Raman
- University Of Minnesota Institute for Health Informatics;
| | - O. Farri
- University Of Minnesota Institute for Health Informatics;
| | - C. Hart
- University of Minnesota School of Nursing;
| | | |
Collapse
|
36
|
Raman N, Selvan A. Synthesis, spectroscopic, electrochemical, DNA binding and photocleavage studies on coordination compounds of bis(4-aminophenyl)methane based novel Schiff bases. RUSS J INORG CHEM+ 2011. [DOI: 10.1134/s0036023611050202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
37
|
Raman N, Sobha S, Thamaraichelvan A. A novel bioactive tyramine derived Schiff base and its transition metal complexes as selective DNA binding agents. Spectrochim Acta A Mol Biomol Spectrosc 2011; 78:888-898. [PMID: 21215688 DOI: 10.1016/j.saa.2010.12.056] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Revised: 12/06/2010] [Accepted: 12/14/2010] [Indexed: 05/30/2023]
Abstract
A novel tyramine derived Schiff base, 3-4-dimethoxybenzylidene-4-aminoantipyrinyl-4-aminoethylphenol(L) and a series of its transition metal complexes of the type, ML2Cl2 where, M=Cu(II), Ni(II), Co(II) and Zn(II) have been designed and synthesized. Their structural features and other properties were deduced from the elemental analysis, magnetic susceptibility and molar conductivity as well as from mass, IR, UV-vis, 1H NMR and EPR spectral studies. The binding properties of these complexes with calf thymus DNA (CT-DNA) were investigated using electronic absorption spectroscopy, viscosity measurement, cyclic voltammetry and molecular docking analysis. The results reveal that the metal(II) complexes interact with DNA through minor groove binding. The interaction has also been investigated by gel electrophoresis. Interestingly, it was found that all the complexes could cleave the circular plasmid pUC19 super coiled (SC) DNA efficiently in the presence of AH2 (ascorbic acid). The complexes showed enhanced antifungal and antibacterial activities compared to the free ligand.
Collapse
Affiliation(s)
- N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar, Tamil Nadu 626 001, India.
| | | | | |
Collapse
|
38
|
Raman N, Selvan A. Studies on DNA binding, electrochemical activation, DNA photocleavage, and biopotency of N and O donor bidentate ligands with Cu(II), Co(II), and Zn(II). J COORD CHEM 2011. [DOI: 10.1080/00958972.2010.551767] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- N. Raman
- a Research Department of Chemistry , VHNSN College, Madurai Kamaraj University , Virudhunagar 626 001, India
| | - A. Selvan
- a Research Department of Chemistry , VHNSN College, Madurai Kamaraj University , Virudhunagar 626 001, India
| |
Collapse
|
39
|
Raman N, Sakthivel A, Jeyamurugan R. Synthesis, structural characterization, antimicrobial, DNA-binding, and photo-induced DNA cleavage activity of some bio-sensitive Schiff base copper(II) complexes. J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.539212] [Citation(s) in RCA: 12] [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: 10/18/2022]
Affiliation(s)
- N. Raman
- a Research Department of Chemistry , VHNSN College , Virudhunagar – 626001 , Tamilnadu , India
| | - A. Sakthivel
- b Department of Chemistry , Unnamalai Institute of Technology , Kovilpatti – 628 502 , Tamilnadu , India
| | - R. Jeyamurugan
- a Research Department of Chemistry , VHNSN College , Virudhunagar – 626001 , Tamilnadu , India
| |
Collapse
|
40
|
Raman N, Kulandaisamy A, Thangaraja C. Synthesis, Spectral, and Cyclic Voltammetric Studies of Tetraaza Copper(II), Oxovanadium(IV), and Zinc(II) Complexes Derived from 1,2‐(Diimino‐4′‐antipyrinyl)‐1,2‐diphenylethane and para‐Substituted Anilines. ACTA ACUST UNITED AC 2010. [DOI: 10.1081/sim-120039266] [Citation(s) in RCA: 8] [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: 11/03/2022]
Affiliation(s)
- N. Raman
- a Department of Chemistry , Virudhunagar Hindu Nadars' Senthil Kumar Nadar College , Virudhunagar, 626 001, India
| | - A. Kulandaisamy
- b Department of Chemistry , SNS College of Technology , Coimbatore, India
| | - C. Thangaraja
- a Department of Chemistry , Virudhunagar Hindu Nadars' Senthil Kumar Nadar College , Virudhunagar, 626 001, India
| |
Collapse
|
41
|
Raman N, Sakthivel A, Jeyamurugan R. Synthesis, characterization, DNA binding, photo-induced DNA cleavage, and antimicrobial activity of metal complexes of a Schiff base derived from bis(3-aminophenyl)malonamide. J COORD CHEM 2010. [DOI: 10.1080/00958970903288294] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- N. Raman
- a Research Department of Chemistry , VHNSN College , Virudhunagar 626001, India
| | - A. Sakthivel
- a Research Department of Chemistry , VHNSN College , Virudhunagar 626001, India
| | - R. Jeyamurugan
- a Research Department of Chemistry , VHNSN College , Virudhunagar 626001, India
| |
Collapse
|
42
|
Raman N, Jeyamurugan R, Senthilkumar R, Rajkapoor B, Franzblau SG. In vivo and in vitro evaluation of highly specific thiolate carrier group copper(II) and zinc(II) complexes on Ehrlich ascites carcinoma tumor model. Eur J Med Chem 2010; 45:5438-51. [PMID: 20864225 DOI: 10.1016/j.ejmech.2010.09.004] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [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: 06/10/2010] [Revised: 08/30/2010] [Accepted: 09/01/2010] [Indexed: 11/19/2022]
Abstract
A new series of copper(II) and zinc(II) complexes have been designed and synthesized using a new type of Schiff bases derived from the reaction of 3-(3-phenyl-allylidene)-pentane-2,4-dione with para substituted aniline and benzene-1,2-dithiol. Their structures have been established by analytical and spectral data. The higher ɛ and low A(‖) values together with positive reduction potentials for these copper complexes suggest that they can mimic the functional properties of naturally occurring proteins. In vivo and in vitro antitumor functions of the complexes against Ehrlich ascites carcinoma tumor model have been investigated. The minimum inhibitory concentration of the complexes has also been investigated against Mycobacterium tuberculosis strain H37Rv. These complexes exhibit significant antitumor, cytotoxic and antituberculosis activity.
Collapse
Affiliation(s)
- N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar-626 001, Tamil Nadu, India.
| | | | | | | | | |
Collapse
|
43
|
Raman N, Joseph J. Synthesis, spectral characterization and antimicrobial activity of macrocyclic Schiff-base copper(II) complexes containing polycrystalline nanosized grains. J COORD CHEM 2010. [DOI: 10.1080/00958970802389763] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- N. Raman
- a Research Department of Chemistry , VHNSN College , Virudhunagar , India
| | - J. Joseph
- a Research Department of Chemistry , VHNSN College , Virudhunagar , India
| |
Collapse
|
44
|
Raman N, Joseph J. Novel metal-based antimicrobial agents of copper(II) complexes: Synthesis, spectral characterization and DNA interaction study. RUSS J INORG CHEM+ 2010. [DOI: 10.1134/s0036023610070120] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
45
|
Raman N, Selvan A, Manisankar P. Spectral, magnetic, biocidal screening, DNA binding and photocleavage studies of mononuclear Cu(II) and Zn(II) metal complexes of tricoordinate heterocyclic Schiff base ligands of pyrazolone and semicarbazide/thiosemicarbazide based derivatives. Spectrochim Acta A Mol Biomol Spectrosc 2010; 76:161-173. [PMID: 20363662 DOI: 10.1016/j.saa.2010.03.007] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Revised: 02/24/2010] [Accepted: 03/11/2010] [Indexed: 05/29/2023]
Abstract
We depict the synthesis and characterization of copper(II) and zinc(II) coordination compounds of 4-(3',4'-dimethoxybenzaldehydene)2-3-dimethyl-1-phenyl-3-pyrazolin-5-semicarbazone (1a), 4-(3',4'-dimethoxybenzaldehydene)2-3-dimethyl-1-phenyl-3-pyrazolin-5-thiosemicarbazone (1b), 4-(3'-hydroxy-4'-nitrobenzaldehydene)2-3-dimeth yl-1-phenyl-3-pyrazolin-5-semicarbazone (1c) and 4-(3'-hydroxy-4'-nitrobenzal dehydene)2-3-dimethyl-1-phenyl-3-pyrazolin-5-thiosemicarbazone (1d). All the remote compounds have the general composition [ML(2)] (M=Cu(II) and Zn(II)); L=Schiff base (1a-1d). All the complexes were characterized by elemental analysis, molar conductivity, IR, (1)H NMR, UV-vis, ESI-Mass, magnetic susceptibility measurements, cyclic voltammetric measurements, and EPR spectral studies. It has been originated that the Schiff bases with Cu(II) and Zn(II) ions form mononuclear complexes on 1:2 (metal:ligand) stoichiometry. Distorted octahedral environment is suggested for the metal complexes. The conductivity data confirm the non-electrolytic nature of the complexes. The interaction of CuL(2)(1a-1d) complexes with CT DNA was investigated by spectroscopic, electrochemical and viscosity measurements. Results suggest that the copper complexes bind to DNA via an intercalative mode. Moreover, the complexes have been found to promote the photocleavage of plasmid DNA pBR322 under irradiation at 365 nm. The Schiff bases and their metal complexes were screened for their antifungal and antibacterial activities against different species of pathogenic fungi and bacteria and their biopotency has been discussed.
Collapse
Affiliation(s)
- N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar, Tamil Nadu 626001, India. drn
| | | | | |
Collapse
|
46
|
Raman N, Jeyamurugan R, Rani RU, Baskaran T, Mitu L. Synthesis, characterization, DNA binding, oxidative damage of DNA strand scission, and antimicrobial activities of β-diketone condensed Schiff-base transition metal complexes. J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.485643] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- N. Raman
- a Research Department of Chemistry , VHNSN College , Virudhunagar 626001, Tamil Nadu, India
| | - R. Jeyamurugan
- a Research Department of Chemistry , VHNSN College , Virudhunagar 626001, Tamil Nadu, India
| | - R. Usha Rani
- a Research Department of Chemistry , VHNSN College , Virudhunagar 626001, Tamil Nadu, India
| | - T. Baskaran
- a Research Department of Chemistry , VHNSN College , Virudhunagar 626001, Tamil Nadu, India
| | - L. Mitu
- b Department of Physics and Chemistry , University of Pitesti , Pitesti 110040, Romania
| |
Collapse
|
47
|
Raman N, Sakthivel A, Jeyamurugan R. Binuclear copper and zinc complexes possessing bio-potential ligands: synthesis, characterization, antimicrobial, SOD mimetic, DNA binding, and cleavage studies. J COORD CHEM 2010. [DOI: 10.1080/00958971003699745] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- N. Raman
- a Research Department of Chemistry , VHNSN College, Madurai Kamaraj University , Virudhunagar 626001, Tamil Nadu, India
| | - A. Sakthivel
- a Research Department of Chemistry , VHNSN College, Madurai Kamaraj University , Virudhunagar 626001, Tamil Nadu, India
| | - R. Jeyamurugan
- a Research Department of Chemistry , VHNSN College, Madurai Kamaraj University , Virudhunagar 626001, Tamil Nadu, India
| |
Collapse
|
48
|
Raman N, Jeyamurugan R, Sakthivel A, Mitu L. Novel metal-based pharmacologically dynamic agents of transition metal(II) complexes: designing, synthesis, structural elucidation, DNA binding and photo-induced DNA cleavage activity. Spectrochim Acta A Mol Biomol Spectrosc 2010; 75:88-97. [PMID: 19910242 DOI: 10.1016/j.saa.2009.09.047] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Revised: 09/20/2009] [Accepted: 09/25/2009] [Indexed: 05/28/2023]
Abstract
Novel Schiff base Cu(II), Ni(II), Co(II) and Zn(II) complexes have been designed and synthesized using the macrocyclic ligand derived from the condensation of diethylphthalate with Schiff base, obtained from benzene-1,2-diamine and 3-benzylidene-pentane-2,4-dione. The ligand and its complexes have been characterized by analytical and spectral techniques. DNA binding properties of these complexes have been investigated by UV-vis, viscosity measurements, cyclic voltammetric and differential pulse voltammogram studies. The intrinsic binding constants for Co(II), Ni(II), Cu(II) and Zn(II) complexes are 1.6x10(6), 1.8x10(6), 2.0x10(6) and 1.5x10(6) M(-1) respectively which are obtained from electronic absorption experiment. Control DNA cleavage experiments using pUC19 supercoiled (SC) DNA and minor groove binder (distamycin) suggest the major groove binding tendency for the synthesized complexes. In the presence of a reducing agent like 3-mercaptopropionic acid (MPA), the synthesized complexes show chemical nuclease activity under dark reaction condition. The complexes also show efficient photo-induced DNA cleavage activity on irradiation with a monochromatic UV light of 360 nm in the presence of inhibitors. Control experiments show inhibition of cleavage in the presence of singlet oxygen quencher like sodium azide and enhancement of cleavage in D(2)O, suggesting the formation of singlet oxygen as a reactive species in a type-II process.
Collapse
Affiliation(s)
- N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar, India.
| | | | | | | |
Collapse
|
49
|
Raman N, Jeyamurugan R, Rajkapoor B, Magesh V. Metal‐based antitumor, cytotoxic and antimicrobial activity: pharmacological evaluation of Knoevenagel condensate β‐diketone Schiff base thiosemicarbazone Cu(II) and Zn(II) complexes. Appl Organomet Chem 2009. [DOI: 10.1002/aoc.1512] [Citation(s) in RCA: 15] [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: 11/07/2022]
|
50
|
Raman N, Jeyamurugan R. Synthesis, characterization, and DNA interaction of mononuclear copper(II) and zinc(II) complexes having a hard–soft NS donor ligand. J COORD CHEM 2009. [DOI: 10.1080/00958970902825195] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- N. Raman
- a Research Department of Chemistry , VHNSN College , Virudhunagar-626 001, Tamil Nadu, India
| | - R. Jeyamurugan
- a Research Department of Chemistry , VHNSN College , Virudhunagar-626 001, Tamil Nadu, India
| |
Collapse
|