1
|
Ding C, Xia M, Wang F, Lei W, Ni Y. The sensitive detection and mechanism of Fe-3,5-dimethyl pyrazole fluorescent sensor to diethylenetriamine pentamethylene phosphonic acid: Experimental study and quantum chemical calculation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 281:121623. [PMID: 35872426 DOI: 10.1016/j.saa.2022.121623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/26/2022] [Accepted: 07/10/2022] [Indexed: 06/15/2023]
Abstract
Diethylenetriamine pentamethylene phosphonic acid (DTPMP) is one of the most commonly used amino organic phosphonates. The existing methods for DTPMP detection are complicated, time-consuming, and cannot detect trace DTPMP in the natural environment. In the present work, the Fe-based 3,5-dimethyl pyrazole fluorescent sensor (Fe-DP) was constructed. The addition of Fe3+ to DP solution can greatly decrease the fluorescent intensity of DP, while the addition of different concentrations of DTPMP will restore the fluorescence intensity of DP to different degrees, to achieve quantitative detection of DTPMP, and the detection limit (LOD) of DTPMP was lower as 0.105 μΜ. The Fe-DP fluorescent sensor exhibited excellent anti-interference ability and good stability. Moreover, the fluorescence quenching mechanism of DP by Fe3+ was revealed by UV absorption spectrum and Multiwfn wavefunction analysis based on density function theory (DFT). The results revealed that the excitation of DP belonged to local excitation, in which the electrons were donated primarily by the N atom with double bond and redistributed within the pyrazole ring.The fluorescence quenching of adding Fe3+ was not caused by resonance energy transfer or charge transfer, which did not belong to dynamic quenching, but due to the ground state complex formed by the coordination of Fe3+ and the double bond N atom on the DP pyrazole ring.
Collapse
Affiliation(s)
- Chao Ding
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Mingzhu Xia
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
| | - Fengyun Wang
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
| | - Wu Lei
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Yue Ni
- School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China
| |
Collapse
|
2
|
Synthesis, characterization, in vitro cytotoxic activity and molecular docking of dinuclear gold(I) complexes with terephthalaldehyde bis(thiosemicarbazones). Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
3
|
Fru PN, Nweke EE, Mthimkhulu N, Mvango S, Nel M, Pilcher LA, Balogun M. Anti-Cancer and Immunomodulatory Activity of a Polyethylene Glycol-Betulinic Acid Conjugate on Pancreatic Cancer Cells. Life (Basel) 2021; 11:462. [PMID: 34063891 PMCID: PMC8223974 DOI: 10.3390/life11060462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 04/28/2021] [Accepted: 05/04/2021] [Indexed: 12/09/2022] Open
Abstract
Drug delivery systems involving polymer therapeutics enhance drug potency by improved solubility and specificity and may assist in circumventing chemoresistance in pancreatic cancer (PC). We compared the effectiveness of the naturally occurring drug, betulinic acid (BA), alone and in a polymer conjugate construct of polyethylene glycol (PEG), (PEG-BA), on PC cells (MIA PaCa-2), a normal cell line (Vero) and on peripheral blood mononuclear cells (PBMCs). PEG-BA, was tested for its effect on cell death, immunomodulation and chemoresistance-linked signalling pathways. The conjugate was significantly more toxic to PC cells (p < 0.001, IC50 of 1.35 ± 0.11 µM) compared to BA (IC50 of 12.70 ± 0.34 µM), with a selectivity index (SI) of 7.28 compared to 1.4 in Vero cells. Cytotoxicity was confirmed by increased apoptotic cell death. PEG-BA inhibited the production of IL-6 by 4-5.5 fold compared to BA-treated cells. Furthermore, PEG-BA treatment of MIA PaCa-2 cells resulted in the dysregulation of crucial chemoresistance genes such as WNT3A, TXNRD1, SLC2A1 and GATA3. The dysregulation of chemoresistance-associated genes and the inhibition of cytokines such as IL-6 by the model polymer construct, PEG-BA, holds promise for further exploration in PC treatment.
Collapse
Affiliation(s)
- Pascaline Nanga Fru
- Department of Surgery, School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg 2193, South Africa; (E.E.N.); (N.M.); (M.N.)
| | - Ekene Emmanuel Nweke
- Department of Surgery, School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg 2193, South Africa; (E.E.N.); (N.M.); (M.N.)
| | - Nompumelelo Mthimkhulu
- Department of Surgery, School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg 2193, South Africa; (E.E.N.); (N.M.); (M.N.)
| | - Sindisiwe Mvango
- Biopolymer Modification and Therapeutics Laboratory, Chemicals Cluster, Council for Scientific and Industrial Research, Meiring Naude Road, Brummeria, Pretoria 0001, South Africa; (S.M.); (M.B.)
- Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa;
| | - Marietha Nel
- Department of Surgery, School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg 2193, South Africa; (E.E.N.); (N.M.); (M.N.)
| | | | - Mohammed Balogun
- Biopolymer Modification and Therapeutics Laboratory, Chemicals Cluster, Council for Scientific and Industrial Research, Meiring Naude Road, Brummeria, Pretoria 0001, South Africa; (S.M.); (M.B.)
| |
Collapse
|
4
|
Ramabulana T, Scheepers LM, Moodley T, Maharaj VJ, Stander A, Gama N, Ferreira D, Sonopo MS, Selepe MA. Bioactive Lignans from Hypoestes aristata. JOURNAL OF NATURAL PRODUCTS 2020; 83:2483-2489. [PMID: 32786879 DOI: 10.1021/acs.jnatprod.0c00443] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Phytochemical investigation of extracts of the stems of Hypoestes aristata led to the isolation of nine lignans that included four known compounds, namely, hinokinin (1), savinin (2), medioresinol (3), and two cubebins (8a,b), three new butyrolactone lignans (4-6), and butyrolactol lignans 7a-c. The structures of the new compounds were established using 1D and 2D NMR and HRESIMS data. The absolute configurations of the new lignans were determined from their ECD data and the Mosher's ester method. This is the first unequivocal assignment of the absolute configuration at C-7 and C-7' of 7- and 7'-hydroxybutyrolactone lignans. The compounds were screened for inhibition of an HIV-1 protease enzyme, and compounds 1 and 6 exhibited moderate activity in this regard.
Collapse
Affiliation(s)
- Tshifhiwa Ramabulana
- Department of Chemistry, University of Pretoria, Lynnwood Road, Hatfield, Pretoria 0002, South Africa
| | - Luki-Marié Scheepers
- Department of Chemistry, University of Pretoria, Lynnwood Road, Hatfield, Pretoria 0002, South Africa
| | - Thirshen Moodley
- Department of Chemistry, University of Pretoria, Lynnwood Road, Hatfield, Pretoria 0002, South Africa
| | - Vinesh J Maharaj
- Department of Chemistry, University of Pretoria, Lynnwood Road, Hatfield, Pretoria 0002, South Africa
| | - André Stander
- Department of Physiology, University of Pretoria, Lynnwood Road, Hatfield, Pretoria 0002, South Africa
| | - Ntombenhle Gama
- Department of Biochemistry, Genetics and Microbiology, University of Pretoria, Lynnwood Road, Hatfield, Pretoria 0002, South Africa
| | - Daneel Ferreira
- Department of Biomolecular Sciences, Division of Pharmacognosy, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, United States
| | - Molahlehi S Sonopo
- Radiochemistry, South African Nuclear Energy Corporation (Necsa), Pelindaba, Brits, South Africa
| | - Mamoalosi A Selepe
- Department of Chemistry, University of Pretoria, Lynnwood Road, Hatfield, Pretoria 0002, South Africa
| |
Collapse
|
5
|
Gallati CM, Goetzfried SK, Ausserer M, Sagasser J, Plangger M, Wurst K, Hermann M, Baecker D, Kircher B, Gust R. Synthesis, characterization and biological activity of bromido[3-ethyl-4-aryl-5-(2-methoxypyridin-5-yl)-1-propyl-1,3-dihydro-2H-imidazol-2-ylidene]gold(i) complexes. Dalton Trans 2020; 49:5471-5481. [PMID: 32255443 DOI: 10.1039/c9dt04824c] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Bromido[3-ethyl-4-aryl-5-(2-methoxypyridin-5-yl)-1-propyl-1,3-dihydro-2H-imidazol-2-ylidene]gold(i) complexes (8a-h) with methoxy, methyl and fluorine substituents at different positions of the 4-aryl ring were synthesized and characterized. The relevance of the 2-methoxypyridin-5-yl residue and the substituents at the 4-aryl ring with regard to the activity against a series of cell lines was determined. Particularly against the Cisplatin-resistant ovarian cancer cell line A2780cis, the most active bromido[3-ethyl-4-(4-methoxyphenyl)-5-(2-methoxypyridin-5-yl)-1-propyl-1,3-dihydro-2H-imidazol-2-ylidene]gold(i) complex 8c was more active than Auranofin. It also inhibited thioredoxin reductase more effectively and induced high amounts of reactive oxygen species in A2780cis cells. Furthermore, its influence on non-cancerous SV 80 lung fibroblasts was lower than that of Auranofin. This fact, together with a high accumulation rate in tumor cells, determined on the example of MCF-7 cells, makes this complex an interesting candidate for further extensive studies.
Collapse
Affiliation(s)
- Caroline M Gallati
- Department of Pharmaceutical Chemistry, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Malinowska K, Lorenz IP, Sadowska B, Mucha P. Metal Ion Complexes with Pyrazoles, Aziridines and Diaziridines – Synthesis and Biological Activity. Curr Med Chem 2019; 26:648-663. [DOI: 10.2174/0929867325666180221124447] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 11/15/2017] [Accepted: 01/25/2018] [Indexed: 12/18/2022]
Abstract
Heterocyclic compounds containing nitrogen ions, like pyrazoles, aziridines, diaziridines and their metal ion complexes with Cu(II), Zn(II) and Ru(III) and others exhibit a wide range of biological activity, including mainly anti-inflammatory, antioxidant, anticancer, and antimicrobial properties. Biological significance of these molecules and thus their potential use in medicine has driven growing interest into their coordination chemistry. A knowledge of the relationship between the structure of chemical compounds and their activity is needed for the synthesis of the preparations possessing the most beneficial features. The choice of interposed substituents may improve biocidal and antitumor action, reduce the toxicity of the initial substance, or even completely eliminate its adverse effects for healthy tissues. The main aim of this review paper is to present the current state of knowledge concerning the synthesis and biological activity of complexes with small heterocyclic ligands containing transition metal ions.
Collapse
Affiliation(s)
- Katarzyna Malinowska
- Department of Allergology and Respiratory Rehabilitation, 2nd Chair of Otolaryngology, Medical University of Lodz, Lodz, Poland
| | - Ingo-Peter Lorenz
- Department of Chemistry, Ludwig-Maximilians-University, Munich, Germany
| | - Beata Sadowska
- Department of Immunology and Infectious Biology, Faculty of Biology and Environmental Protection, University of Lodz, Lodz, Poland
| | - Paulina Mucha
- Department of Cosmetic Raw Materials Chemistry, Faculty of Pharmacy, Medical University of Lodz, Lodz, Poland
| |
Collapse
|
7
|
Arnal L, Fuertes S, Martín A, Sicilia V. The Use of Cyclometalated NHCs and Pyrazoles for the Development of Fully Efficient Blue PtII
Emitters and Pt/Ag Clusters. Chemistry 2018; 24:9377-9384. [DOI: 10.1002/chem.201800646] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 05/01/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Lorenzo Arnal
- Departamento de Química Inorgánica, Facultad de Ciencias; Universidad de Zaragoza, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); Pedro Cerbuna 12 50009 Zaragoza Spain
| | - Sara Fuertes
- Departamento de Química Inorgánica, Facultad de Ciencias; Universidad de Zaragoza, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); Pedro Cerbuna 12 50009 Zaragoza Spain
| | - Antonio Martín
- Departamento de Química Inorgánica, Facultad de Ciencias; Universidad de Zaragoza, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); Pedro Cerbuna 12 50009 Zaragoza Spain
| | - Violeta Sicilia
- Departamento de Química Inorgánica, Escuela de Ingeniería y Arquitectura de Zaragoza; Universidad de Zaragoza, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH); Campus Río Ebro, Edificio Torres Quevedo 50018 Zaragoza Spain
| |
Collapse
|
8
|
Atmaca H, Özkan AN, Zora M. Novel ferrocenyl pyrazoles inhibit breast cancer cell viability via induction of apoptosis and inhibition of PI3K/Akt and ERK1/2 signaling. Chem Biol Interact 2017; 263:28-35. [DOI: 10.1016/j.cbi.2016.12.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 11/10/2016] [Accepted: 12/14/2016] [Indexed: 11/25/2022]
|
9
|
Activity of phosphino palladium(II) and platinum(II) complexes against HIV-1 and Mycobacterium tuberculosis. Biometals 2016; 29:637-50. [DOI: 10.1007/s10534-016-9940-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 05/24/2016] [Indexed: 10/21/2022]
|
10
|
Anion-/cation-directed reaction routes to polymorphic forms of a pyrazole-type ligand and its coordination compounds with zinc. Key structural differences between polymorphs’. Struct Chem 2016. [DOI: 10.1007/s11224-015-0734-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
11
|
Piyasaengthong A, Boonyalai N, Suramitr S, Songsasen A. Synthesis, characterization, and pepsin inhibition study of Au(III)–3-(2′-thiazolylazo)-2,6-diaminopyridine complex. INORG CHEM COMMUN 2015. [DOI: 10.1016/j.inoche.2015.06.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
12
|
Liu H, Li FX, Pi Y, Wang DJ, Hu YJ, Zheng J. Fluorescence quenching study of 2,6-bis(5-(4-methylphenyl)-1-H-pyrazol-3-yl)pyridine with metal ions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 145:588-593. [PMID: 25818306 DOI: 10.1016/j.saa.2015.03.049] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2014] [Revised: 01/27/2015] [Accepted: 03/02/2015] [Indexed: 06/04/2023]
Abstract
A novel bispyrazole derivative 2,6-bis(5-(4-methylphenyl)-1-H-pyrazol-3-yl)pyridine was synthesized and its structure was confirmed by (1)H NMR, FTIR, MS techniques and elemental analysis. The binding interactions of BMPP with Cd(2+), Co(2+), Pb(2+) and Cu(2+) ions were investigated in MeOH-H2O solution by fluorescence quenching technique at two temperatures (25 and 35°C). Their quenching constants KSV, binding constants K, binding sites n and thermodynamic parameters (ΔH, ΔG and ΔS) were determined. The results indicated that the metal ions quenched the intrinsic fluorescence of the bispyrazole by forming the bispyrazole-metal complexes and their quenching process was a static quenching mechanism. In addition, the process of interaction was spontaneous and mainly ΔS-driven.
Collapse
Affiliation(s)
- Hua Liu
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, China
| | - Fang-Xiong Li
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, China
| | - Yan Pi
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, China
| | - Dun-Jia Wang
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, China.
| | - Yan-Jun Hu
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, China
| | - Jing Zheng
- Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, China
| |
Collapse
|
13
|
Fonteh P, Elkhadir A, Omondi B, Guzei I, Darkwa J, Meyer D. Impedance technology reveals correlations between cytotoxicity and lipophilicity of mono and bimetallic phosphine complexes. Biometals 2015; 28:653-67. [DOI: 10.1007/s10534-015-9851-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Accepted: 03/25/2015] [Indexed: 11/25/2022]
|
14
|
Abstract
A number of gold(III) compounds has been designed with the objective of overcoming the disadvantages associated with the platinum-based drugs for cancer treatment. Compounds of a remarkable structural manifold show significant antiproliferative effects in vitro against a number of cancer cells, including cisplatin resistant ones. The target of most of them is, unlike that of cisplatin, not the DNA. Although the mechanisms of action displayed by the gold compounds in biological media are still under investigation, many studies show evidence that the cellular targets are mitochondria-based. Recent advances in gold(III) medicinal chemistry also recommend such compounds for other pharmacological applications such as the treatment of viral or parasitic diseases. The radioactive isotopes 198Au and 199Au present potential in radiotherapy.
Collapse
|
15
|
Kapewangolo P, Hussein AA, Meyer D. Inhibition of HIV-1 enzymes, antioxidant and anti-inflammatory activities of Plectranthus barbatus. JOURNAL OF ETHNOPHARMACOLOGY 2013; 149:184-190. [PMID: 23811046 DOI: 10.1016/j.jep.2013.06.019] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 06/04/2013] [Accepted: 06/13/2013] [Indexed: 06/02/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Plectranthus barbatus is widely used in African countries as an herbal remedy to manage HIV/AIDS and related conditions. AIM OF THE STUDY To investigate the HIV-1 inhibitory, anti-inflammatory and antioxidant properties of P. barbatus and thereby provide empirical evidence for the apparent anecdotal success of the extracts. MATERIALS AND METHODS Ethanolic extract of P. barbatus's leaves was screened against two HIV-1 enzymes: protease (PR) and reverse transcriptase (RT). Cytotoxicity of the extract was determined through measuring tetrazolium dye uptake of peripheral blood mononuclear cells (PBMCs) and the TZM-bl cell line. Confirmatory assays for cytotoxicity were performed using flow cytometry and real-time cell electronic sensing (RT-CES). The free radical scavenging activity of the extract was investigated with 2,2-diphenyl-1-picrylhydrazyl while the anti-inflammatory properties of the plant extract were investigated using a Th1/Th2/Th17 cytometric bead array technique. RESULTS P. barbatus extract inhibited HIV-1PR and the 50% inhibitory concentration (IC50) was 62.0 µg/ml. The extract demonstrated poor inhibition of HIV-1 RT. Cytotoxicity testing presented CC50 values of 83.7 and 50.4 µg/ml in PBMCs and TZM-bl respectively. In addition, the extract stimulated proliferation in HIV negative and positive PBMCs treated. RT-CES also registered substantial TZM-bl proliferation after extract treatment. The extract exhibited strong antioxidant activity with an IC50 of 16 µg/ml and reduced the production of pro-inflammatory cytokines indicating anti-inflammatory potential. CONCLUSION This is the first demonstration of the in vitro anti HIV-1 potential of P. barbatus including direct activity as well as through the stimulation of protective immune and inflammation responses. The low cytotoxicity of the extract is also in agreement with the vast anecdotal use of this plant in treating various ailments with no reported side-effects.
Collapse
Affiliation(s)
- Petrina Kapewangolo
- Department of Biochemistry, Faculty of Natural and Agricultural Sciences, University of Pretoria, Hatfield Campus, Pretoria 0002, South Africa
| | | | | |
Collapse
|
16
|
Mphahlele M, Papathanasopoulos M, Cinellu MA, Coyanis M, Mosebi S, Traut T, Modise R, Coates J, Hewer R. Modification of HIV-1 reverse transcriptase and integrase activity by gold(III) complexes in direct biochemical assays. Bioorg Med Chem 2012; 20:401-7. [DOI: 10.1016/j.bmc.2011.10.072] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 10/17/2011] [Accepted: 10/25/2011] [Indexed: 11/30/2022]
|
17
|
Perspective: the potential of pyrazole-based compounds in medicine. Biometals 2011; 25:9-21. [DOI: 10.1007/s10534-011-9496-4] [Citation(s) in RCA: 137] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Accepted: 09/14/2011] [Indexed: 12/20/2022]
|
18
|
Fonteh PN, Keter FK, Meyer D. New bis(thiosemicarbazonate) gold(III) complexes inhibit HIV replication at cytostatic concentrations: potential for incorporation into virostatic cocktails. J Inorg Biochem 2011; 105:1173-80. [PMID: 21708102 DOI: 10.1016/j.jinorgbio.2011.05.011] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2011] [Revised: 05/13/2011] [Accepted: 05/18/2011] [Indexed: 10/18/2022]
Abstract
Four bis(thiosemicarbazonate)gold(III) complexes (1-4) with a general formula [Au(L)]Cl {L=L1, glyoxal-bis(N(4)-methylthiosemicarbazone); L2, glyoxal-bis(N(4)-ethylthiosemicarbazone); L3, diacetyl-bis(N(4)-methylthiosemicarbazone); L4, diacetyl-bis(N(4)-ethylthiosemicarbazone)} were synthesised and screened for activity against the human immunodeficiency virus (HIV). Complexes 1-4 were characterised using (1)H-NMR and IR spectroscopy; and their purity established by micronanalysis. Complex 3 inhibited viral infection of TZM-bl cells by 98% (IC(50)=6.8±0.6μM) at a non toxic concentration of 12.5μM while complex 4 inhibited infection of these cells by 72 and 98% (IC(50)=5.3±0.4μM) at concentrations of 6.25 and 12.5μM respectively. The mechanism of inhibition of infection in TZM-bl cells is presumably as a result of the cytostatic or anti-proliferative activity that was observed for complex 4 in real time cell electronic sensing (RT-CES) and carboxyflourescein succinimidyl ester (CFSE) analysis. Treatment of T lymphocytes from HIV infected individuals with 4 decreased CD4+ T cell expression (p=0.0049) as demonstrated by multi-parametric flow cytometry without suppressing cytokine production. None of the ligands (L1-L4) demonstrated anti-viral activity, supporting the importance of metal (gold) complexation in these potential drugs. Complexes 3 and 4 were shown to have ideal lipophilicity values that were similar when shake flask (0.97±0.5 and 2.42±0.6) and in silico prediction (0.8 and 1.5) methods were compared. The activity and drug-like properties of complexes 3 and 4 suggests that these novel metal-based compounds could be combined with virus inhibitory drugs to work as cytostatic agents in the emerging class of anti-HIV drugs known as virostatics.
Collapse
Affiliation(s)
- Pascaline N Fonteh
- Department of Biochemistry, University of Pretoria, Hatfield Campus, Pretoria 0002, South Africa
| | | | | |
Collapse
|
19
|
Berners-Price SJ, Filipovska A. Gold compounds as therapeutic agents for human diseases. Metallomics 2011; 3:863-73. [DOI: 10.1039/c1mt00062d] [Citation(s) in RCA: 375] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
20
|
HIV therapeutic possibilities of gold compounds. Biometals 2010; 23:185-96. [DOI: 10.1007/s10534-010-9293-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2009] [Accepted: 01/16/2010] [Indexed: 10/19/2022]
|
21
|
Fonteh P, Meyer D. Novel gold(i) phosphine compounds inhibit HIV-1 enzymes. Metallomics 2009; 1:427-33. [DOI: 10.1039/b909036c] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|