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Mudi A, Ray S, Bera M, Dolai M, Das M, Kundu P, Laha S, Choudhuri I, Chandra Samanta B, Bhattacharyya N, Maity T. A multi-spectroscopic and molecular docking approach for DNA/protein binding study and cell viability assay of first-time reported pendent azide bearing Cu(II)-quercetin and dicyanamide bearing Zn(II)-quercetin complexes. Heliyon 2023; 9:e22712. [PMID: 38125469 PMCID: PMC10731082 DOI: 10.1016/j.heliyon.2023.e22712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/16/2023] [Accepted: 11/16/2023] [Indexed: 12/23/2023] Open
Abstract
In the current study, one new quercetin-based Zn(II) complex [Zn(Qr)(CNNCN)(H2O)2] (Complex 1) which is developed by condensation of quercetin with ZnCl2 in the presence of NaN(CN)2 and Cu(II) complex [Cu(Qr)N3(CH3OH)(H2O)] (complex 2) which is developed by the condensation reaction of quercetin and CuCl2 in presence of NaN3, are thoroughly examined in relation to their use in biomedicine. The results of several spectroscopic studied confirm the structure of both the complexes and the Density Functional Theory (DFT) study helps to optimize the structure of complex 1 and 2. After completion of the identification process, DNA and Human Serum Albumin (HSA) binding efficacy of both the investigated complexes are performed by implementing a long range of biophysical studies and a thorough analysis of the results unveils that complex 1 has better interaction efficacy with the macromolecules than complex 2. The binding efficacy of complex 1 is comparatively higher towards both macromolecules because of its pure groove binding mode during interaction with DNA and the presence of an extra H-bond during connection with HSA. The experimental host-guest binding results is fully validated by molecular docking study. Interestingly complex 1 shows better antioxidant properties than complex 2, as well as quercetin, and it has strong anticancer property with minimal damage to normal cells, which is proved by the MTT assay study. Better DNA and HSA binding efficacy of 1 may be the reason for the better anticancer property of complex 1.
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Affiliation(s)
- Anupam Mudi
- Department of Botany, Behala College, Behala, India
| | - Shubham Ray
- Department of Chemistry, Prabhat Kumar College, Contai, Contai, Purba Medinipur, 721404, India
| | - Manjushree Bera
- Department of Nutrition, Prabhat Kumar College, Contai, Contai, Purba Medinipur, 721404, India
| | - Malay Dolai
- Department of Chemistry, Prabhat Kumar College, Contai, Contai, Purba Medinipur, 721404, India
| | - Manik Das
- Department of Chemistry, Prabhat Kumar College, Contai, Contai, Purba Medinipur, 721404, India
| | - Pronab Kundu
- Department of Chemistry, Presidency University, Yelahanka, Bengaluru, 560064, India
| | | | | | | | | | - Tithi Maity
- Department of Chemistry, Prabhat Kumar College, Contai, Contai, Purba Medinipur, 721404, India
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Ganguly S, Ghosh D, Narayanaswamy N, Govindaraju T, Basu G. Dual DNA binding mode of a turn-on red fluorescent probe thiazole coumarin. PLoS One 2020; 15:e0239145. [PMID: 32941495 PMCID: PMC7497988 DOI: 10.1371/journal.pone.0239145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 08/31/2020] [Indexed: 11/19/2022] Open
Abstract
Turn-on fluorescent probes show enhanced emission upon DNA binding, advocating their importance in imaging cellular DNA. We have probed the DNA binding mode of thiazole-coumarin (TC) conjugate, a recently reported hemicyanine-based turn-on red fluorescent probe, using a number of biophysical techniques and a series of short oligonucleotides. TC exhibited increased fluorescence anisotropy and decreased absorbance (~50%) at low [DNA]/[TC] ratio. Although the observed hypochromicity and the saturating value of [DNA base pair]:[TC] ratio is consistent with a previous study that suggested intercalation to be the DNA binding mode of TC, a distinctly different and previously unreported binding mode was observed at higher ratios of [DNA]:[TC]. With further addition of DNA, only oligonucleotides containing AnTn or (AT)n stretches showed further change-decreased hypochromicity, red shifted absorption peaks and concomitant fluorescence enhancement, saturating at about 1:1 [DNA]: [TC]. 1H-NMR chemical shift perturbation patterns and H1'-H6/H8 NOE cross-peaks of the 1:1 complex indicated minor groove binding by TC. ITC showed the 1:1 DNA binding event to be endothermic (ΔH° ~ 2 kcal/mol) and entropy driven (ΔS° ~ 32 cal/mol/K). Taken together, the experimental data suggest a dual DNA binding mode by TC. At low [DNA]/[TC] ratio, the dominant mode is intercalation. This switches to minor groove binding at higher [DNA]/[TC], only for sequences containing AnTn or (AT)n stretches. Turn-on fluorescence results only in the previously unreported minor groove bound state. Our results allow a better understanding of DNA-ligand interaction for the newly reported turn-on probe TC.
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Affiliation(s)
| | - Debasis Ghosh
- Bioorganic Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India
| | - Nagarjun Narayanaswamy
- Bioorganic Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India
| | - T. Govindaraju
- Bioorganic Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru, India
| | - Gautam Basu
- Department of Biophysics, Bose Institute, Kolkata, India
- * E-mail: ,
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Górecki M, Zinna F, Biver T, Di Bari L. Induced circularly polarized luminescence for revealing DNA binding with fluorescent dyes. J Pharm Biomed Anal 2017; 144:6-11. [DOI: 10.1016/j.jpba.2017.02.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 01/13/2017] [Accepted: 02/04/2017] [Indexed: 11/28/2022]
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Oliveira AA, Franco LL, dos Santos RG, Perdigão GMC, da Silva JG, Souza-Fagundes EM, Beraldo H. Neutron activation of In(iii) complexes with thiosemicarbazones leads to the production of potential radiopharmaceuticals for the treatment of breast cancer. NEW J CHEM 2017. [DOI: 10.1039/c7nj01547j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
114mIn(iii) complexes with 2-acetylpyridine-derived thiosemicarbazones show potent cytotoxic activity.
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Affiliation(s)
- Alexandre A. Oliveira
- Departamento de Química
- Universidade Federal de Minas Gerais
- 31270-901 Belo Horizonte
- Brazil
| | - Lucas L. Franco
- Departamento de Química
- Universidade Federal de Minas Gerais
- 31270-901 Belo Horizonte
- Brazil
| | - Raquel G. dos Santos
- Centro de Desenvolvimento da Tecnologia Nuclear
- CDTN
- 31270-901 Belo Horizonte
- Brazil
| | - Gabriele M. C. Perdigão
- Departamento de Fisiologia e Biofísica
- Universidade Federal de Minas Gerais
- 31270-901 Belo Horizonte
- Brazil
| | - Jeferson G. da Silva
- Departamento de Farmácia
- Universidade Federal de Juiz de Fora
- Campus Governador Valadares
- 35010-177 Governador Valadares
- Brazil
| | - Elaine M. Souza-Fagundes
- Departamento de Fisiologia e Biofísica
- Universidade Federal de Minas Gerais
- 31270-901 Belo Horizonte
- Brazil
| | - Heloisa Beraldo
- Departamento de Química
- Universidade Federal de Minas Gerais
- 31270-901 Belo Horizonte
- Brazil
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Dömötör O, de Almeida RFM, Côrte-Real L, Matos CP, Marques F, Matos A, Real C, Kiss T, Enyedy ÉA, Helena Garcia M, Tomaz AI. Studies on the mechanism of action of antitumor bis(aminophenolate) ruthenium(III) complexes. J Inorg Biochem 2016; 168:27-37. [PMID: 28006663 DOI: 10.1016/j.jinorgbio.2016.12.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 12/06/2016] [Accepted: 12/09/2016] [Indexed: 01/13/2023]
Abstract
Two recently published Ru(III) complexes bearing (N2O2) tetradentate bis(aminophenolate) ligands, formulated as [Ru(III)(salan)(PPh3)Cl] (salan is the tetradentate ligand 6,6'-(1S,2S)-cyclohexane-1,2-diylbis(azanediyl)bis(methylene)bis(3-methoxyphenol) in complex 1, or 2,2'-(1S,2S)-cyclohexane-1,2-diylbis(azanediyl)bis(methylene)bis(4-methoxyphenol) in complex 2; PPh3 is triphenylphosphane) and found very active against ovarian and breast adenocarcinoma human cells were studied to outline their antitumor mode of action. The human cisplatin-sensitive ovarian adenocarcinoma line A2780 was used herein as the cell model. At a 24h challenge (similarly as found before for 72h) both complexes are active, their cytotoxicity being comparable to that of cisplatin in the same conditions. As a possible target in the cell for their action, the interaction of 1 and 2 with DNA was assessed through displacement of well-established DNA fluorescent probes (ethidium bromide, EB, and 4',6-diamidino-2-phenylindole, DAPI) through steady-state and time-resolved fluorescence spectroscopy. The whole emission spectra were analyzed globally for the binary DNA-probe and ternary DNA-probe-Ru(III) complex systems. Both Ru(III) complexes can displace EB and bind to DNA with similar and moderate strong affinity with conditional stability constants of logK'=(5.05±0.01) for 1 and logK'=(4.79±0.01) for 2. The analysis of time-domain fluorescence intensity decays confirmed both qualitatively and quantitatively the model used to describe the binding and competition processes. Cell studies indicated that apoptosis is the major mechanism of cell death for both complexes, with 2 (the more active complex) promoting that process more efficiently than 1. Transmission electron micrographs revealed clear alterations on intracellular organization consistent with the induction of programmed cell death processes.
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Affiliation(s)
- Orsolya Dömötör
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary; MTA-SZTE Bioinorganic Chemistry Research Group, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Rodrigo F M de Almeida
- Centro de Química e Bioquímica (CQB), Faculdade de Ciências, ULisboa, Campo Grande, Lisbon, Portugal
| | - Leonor Côrte-Real
- Centro de Química Estrutural (CQE), Faculdade de Ciências, ULisboa, Campo Grande, Lisbon, Portugal
| | - Cristina P Matos
- Centro de Química Estrutural (CQE), Faculdade de Ciências, ULisboa, Campo Grande, Lisbon, Portugal; Centro de Química Estrutural (CQE), Instituto Superior Técnico, ULisboa, Av. Rovisco Pais, 1, Lisbon, Portugal
| | - Fernanda Marques
- Centro de Ciências e Tecnologias Nucleares (C2TN), Instituto Superior Técnico, ULisboa, Estrada Nacional 10, Bobadela, Loures, Portugal
| | - António Matos
- Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Quinta da Granja, Monte da Caparica, Portugal
| | - Carla Real
- Centro de Química e Bioquímica (CQB), Faculdade de Ciências, ULisboa, Campo Grande, Lisbon, Portugal
| | - Tamás Kiss
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary; MTA-SZTE Bioinorganic Chemistry Research Group, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Éva Anna Enyedy
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - M Helena Garcia
- Centro de Química Estrutural (CQE), Faculdade de Ciências, ULisboa, Campo Grande, Lisbon, Portugal
| | - Ana Isabel Tomaz
- Centro de Química Estrutural (CQE), Faculdade de Ciências, ULisboa, Campo Grande, Lisbon, Portugal.
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Rakashanda S, Qazi AK, Majeed R, Andrabi SM, Hamid A, Sharma PR, Amin S. Plant-derived protease inhibitors LC-pi (Lavatera cashmeriana) inhibit human lung cancer cell proliferation in vitro. Nutr Cancer 2014; 67:156-66. [PMID: 25412192 DOI: 10.1080/01635581.2015.967876] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The objective of this study was to check the anticancer activity of purified protease inhibitors of Lavatera cashmeriana viz LC-pi I, II, III, and IV (Lavatera cashmeriana protease inhibitors) on A549 (lung) cell. It was found that LC-pi I and II significantly inhibited the proliferation of A549 cells with IC₅₀ value of 54 μg/ml and 38 μg/ml, respectively, whereas inhibition by LC-pi III and IV was negligible. LC-pi I and II were further found to inhibit formation of colonies in a dose-dependent manner. Also, both inhibitors were found to induce apoptosis causing chromatin condensation and DNA fragmentation, without loss of mitochondrial membrane potential. Cell cycle revealed a significant increase of subG₀/G₁ phase cells that are apoptotic cells. We also demonstrated a dose-dependent decrease in migration of A549 cells on cell migration assay by both inhibitors. Taken together, we demonstrate that LC-pi I and II inhibited proliferation through arresting cells before apoptosis, inducing apoptosis and inhibiting cell migration in human lung cancer cells, but the study warrants further investigation. Our results support the notion that plant protease inhibitors may have the potential to advance as chemopreventive agents.
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Affiliation(s)
- Syed Rakashanda
- a Department of Biochemistry , The University of Kashmir , Srinagar , India
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Biological Evaluation of a New Synthesized Pt(II) Complex by Cytotoxic and Spectroscopic Studies. Cell Biochem Biophys 2014; 71:1415-24. [DOI: 10.1007/s12013-014-0364-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Recio Despaigne AA, Da Silva JG, da Costa PR, Dos Santos RG, Beraldo H. ROS-mediated cytotoxic effect of copper(II) hydrazone complexes against human glioma cells. Molecules 2014; 19:17202-20. [PMID: 25350363 PMCID: PMC6270821 DOI: 10.3390/molecules191117202] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 10/15/2014] [Accepted: 10/15/2014] [Indexed: 01/04/2023] Open
Abstract
2-Acetylpyridine acetylhydrazone (H2AcMe), 2-benzoylpyridine acetylhydrazone (H2BzMe) and complexes [Cu(H2AcMe)Cl2] (1) and [Cu(H2BzMe)Cl2] (2) were assayed for their cytotoxicity against wild type p53 U87 and mutant p53 T98 glioma cells, and against MRC-5 fibroblast cells. Compounds 1 and 2 proved to be more active than the corresponding hydrazones against U87, but not against T98 cells. Compound 1 induced higher levels of ROS than H2AcMe in both glioma cell lines. H2AcMe and 1 induced lower levels of ROS in MRC5 than in U87 cells. Compound 2 induced lower levels of ROS in MRC5 than in T98 cells. The cytotoxic effect of 1 in U87 cells could be related to its ability to provoke the release of ROS, suggesting that the cytotoxicity of 1 might be somehow p53 dependent.
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Affiliation(s)
- Angel A Recio Despaigne
- Departamento de Química, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Brazil.
| | - Jeferson G Da Silva
- Departamento de Química, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Brazil.
| | - Pryscila R da Costa
- Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), 31270-901 Belo Horizonte, Brazil.
| | - Raquel G Dos Santos
- Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), 31270-901 Belo Horizonte, Brazil.
| | - Heloisa Beraldo
- Departamento de Química, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, Brazil.
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Cytotoxic and spectroscopic studies on binding of a new synthesized bipyridine ethyl dithiocarbamate Pt(II) nitrate complex to the milk carrier protein of BLG. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2013. [DOI: 10.1007/s13738-013-0232-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Hepel M, Stobiecka M, Peachey J, Miller J. Intervention of glutathione in pre-mutagenic catechol-mediated DNA damage in the presence of copper(II) ions. Mutat Res 2012; 735:1-11. [PMID: 22683503 DOI: 10.1016/j.mrfmmm.2012.05.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 05/25/2012] [Accepted: 05/29/2012] [Indexed: 11/28/2022]
Abstract
The catechol-mediated DNA damage in the presence of Cu(II) ions involves oxidation of guanine to 8-oxoguanine (8-oxoG) and DNA strand scission. It proceeds through the reactive oxygen species (ROS) generation. The mutagenicity of 8-oxoG lesions is due to its miscoding propensity reflected in GC→TA transversion taking place during the DNA repair process. To gain new insights into the nature of catechol-mediated DNA damage and its prevention, we have investigated the changes in DNA melting characteristics and 8-oxoG formation as the indicators of DNA damage in a model calf-thymus DNA system. A novel fluorescence method for DNA melting temperature determination, based on DAPI fluorescent-probe staining, has been proposed. The DNA melting-onset temperature has been found to be more sensitive to DNA damage than the standard melting temperature due to the increased width of the melting transition observed in oxidatively damaged DNA. We have found that the efficiency of Fenton cascade in generating DNA-damaging ROS is higher for catechol than for GSH, two strong antioxidants, mainly due to the much longer distance between ROS-generating radical group in GS to nucleobases than that of semiquinone radical group to nucleobases (2.1nm vs. 0.27nm), making the ROS transport from GSH an order of magnitude less likely to damage DNA because of short lifetime of HO radicals. The antioxidant and DNA-protecting behaviors of GSH have been elucidated. We have found that the redox potential of GSH/GSSG couple is lower than that of catechol/semiquinone couple. Hence, GSH keeps catechol in the reduced state, thereby shutting down the initial step of the catechol-mediated Fenton cascade. The catechol-induced DNA damage in the presence of Cu(II) ions has also been confirmed in studies of ON-OFF hairpin-oligonucleotide beacons.
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Affiliation(s)
- Maria Hepel
- Department of Chemistry, State University of New York at Potsdam, Potsdam, NY 13676, United States.
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Divsalar A, Saboury AA, Ahadi L, Zemanatiyar E, Mansouri-Torshizi H, Ajloo D, Sarma RH. Biological evaluation and interaction of a newly designed anti-cancer Pd(II) complex and human serum albumin. J Biomol Struct Dyn 2012; 29:283-96. [PMID: 21875149 DOI: 10.1080/07391102.2011.10507385] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
The pharmacokinetics and pharmacodynamics of any drug will depend, largely, on the interaction that has with human serum albumin (HSA), the most abundant plasma protein. The interaction between newly synthesized Pd(II) complexe, 2,2'-bipyridin Butylglycinato Pd(II) nitrate, an anti-tumor component, with HSA was studied at different temperatures by fluorescence, far UV circular dichroism (CD), UV-visible spectrophotometry and theoretical approaches. The Pd(II) complex has a strong ability to quench the intrinsic fluorescence of HSA through a dynamic quenching procedure. The binding parameters and thermodynamic parameters, including δH°, δS° and δG° were calculated by fluorescence quenching method, indicated that hydrophobic forces play a major role in the interaction of Pd(II) complex with HSA. Based on Autodock, FRET (fluorescence resonance energy transfer) and fluorescence quenching data, it may be concluded that one of the binding sites in the complex of HSA is near the only one Trp of HSA (Trp214) in sub domain IIA of the protein. Far-UV-CD results indicated that Pd(II)-complex induced increase in the α-helical content of the protein. The anti-tumor property of the synthesized Pd(II) complex was studied by testing it on human tumor cell line K562. The 50% cytotoxic concentration (Cc₅₀) of complex was determined using MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide) assay. Also, fluorescence staining with DAPI (4,6-diamidino-2-phenylindole) revealed some typical nuclear changes that are characteristic of apoptosis which is induced at Cc₅₀ concentration of Pd(II) complex in K562 cell line after 24 h incubation. Our results suggest that Pd(II) complex is a promising anti-proliferative agent and should execute its biological effects by inducing apoptosis.
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Affiliation(s)
- Adeleh Divsalar
- Institute of Biochemistry and Biophysics, University of Tehran. Tehran, Iran.
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Gabriel LM, Sanchez EF, Silva SG, Santos RG. Tumor cytotoxicity of leucurolysin-B, a P-III snake venom metalloproteinase from Bothrops leucurus. J Venom Anim Toxins Incl Trop Dis 2012. [DOI: 10.1590/s1678-91992012000100004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- LM Gabriel
- Center for Development of Nuclear Technology, Brazil
| | | | - SG Silva
- Ezequiel Dias Foundation, Brazil
| | - RG Santos
- Center for Development of Nuclear Technology, Brazil; Brazil National Institute, Brazil
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