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Khalymbadzha IA, Fatykhov RF, Butorin II, Sharapov AD, Potapova AP, Muthipeedika NJ, Zyryanov GV, Melekhin VV, Tokhtueva MD, Deev SL, Kukhanova MK, Mochulskaya NN, Tsurkan MV. Bioinspired Pyrano[2,3- f]chromen-8-ones: Ring C-Opened Analogues of Calanolide A: Synthesis and Anti-HIV-1 Evaluation. Biomimetics (Basel) 2024; 9:44. [PMID: 38248618 PMCID: PMC10813249 DOI: 10.3390/biomimetics9010044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 12/23/2023] [Accepted: 01/09/2024] [Indexed: 01/23/2024] Open
Abstract
We have designed and synthesized a series of bioinspired pyrano[2,3-f]coumarin-based Calanolide A analogs with anti-HIV activity. The design of these new calanolide analogs involved incorporating nitrogen heterocycles or aromatic groups in lieu of ring C, effectively mimicking and preserving their bioactive properties. Three directions for the synthesis were explored: reaction of 5-hydroxy-2,2-dimethyl-10-propyl-2H,8H-pyrano[2,3-f]chromen-8-one with (i) 1,2,4-triazines, (ii) sulfonylation followed by Suzuki cross-coupling with (het)aryl boronic acids, and (iii) aminomethylation by Mannich reaction. Antiviral assay of the synthesized compounds showed that compound 4 has moderate activity against HIV-1 on enzymes and poor activity on the cell model. A molecular docking study demonstrates a good correlation between in silico and in vitro HIV-1 reverse transcriptase (RT) activity of the compounds when docked to the nonnucleoside RT inhibitor binding site, and alternative binding modes of the considered analogs of Calanolide A were established.
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Affiliation(s)
- Igor A. Khalymbadzha
- Department of Organic and Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia; (R.F.F.); (I.I.B.); (A.D.S.); (A.P.P.); (N.J.M.); (G.V.Z.); (V.V.M.); (M.D.T.); (S.L.D.); (N.N.M.)
| | - Ramil F. Fatykhov
- Department of Organic and Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia; (R.F.F.); (I.I.B.); (A.D.S.); (A.P.P.); (N.J.M.); (G.V.Z.); (V.V.M.); (M.D.T.); (S.L.D.); (N.N.M.)
| | - Ilya I. Butorin
- Department of Organic and Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia; (R.F.F.); (I.I.B.); (A.D.S.); (A.P.P.); (N.J.M.); (G.V.Z.); (V.V.M.); (M.D.T.); (S.L.D.); (N.N.M.)
| | - Ainur D. Sharapov
- Department of Organic and Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia; (R.F.F.); (I.I.B.); (A.D.S.); (A.P.P.); (N.J.M.); (G.V.Z.); (V.V.M.); (M.D.T.); (S.L.D.); (N.N.M.)
| | - Anastasia P. Potapova
- Department of Organic and Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia; (R.F.F.); (I.I.B.); (A.D.S.); (A.P.P.); (N.J.M.); (G.V.Z.); (V.V.M.); (M.D.T.); (S.L.D.); (N.N.M.)
| | - Nibin Joy Muthipeedika
- Department of Organic and Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia; (R.F.F.); (I.I.B.); (A.D.S.); (A.P.P.); (N.J.M.); (G.V.Z.); (V.V.M.); (M.D.T.); (S.L.D.); (N.N.M.)
| | - Grigory V. Zyryanov
- Department of Organic and Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia; (R.F.F.); (I.I.B.); (A.D.S.); (A.P.P.); (N.J.M.); (G.V.Z.); (V.V.M.); (M.D.T.); (S.L.D.); (N.N.M.)
| | - Vsevolod V. Melekhin
- Department of Organic and Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia; (R.F.F.); (I.I.B.); (A.D.S.); (A.P.P.); (N.J.M.); (G.V.Z.); (V.V.M.); (M.D.T.); (S.L.D.); (N.N.M.)
- Department of Medical Biology and Genetics, Ural State Medical University, 620028 Yekaterinburg, Russia
| | - Maria D. Tokhtueva
- Department of Organic and Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia; (R.F.F.); (I.I.B.); (A.D.S.); (A.P.P.); (N.J.M.); (G.V.Z.); (V.V.M.); (M.D.T.); (S.L.D.); (N.N.M.)
| | - Sergey L. Deev
- Department of Organic and Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia; (R.F.F.); (I.I.B.); (A.D.S.); (A.P.P.); (N.J.M.); (G.V.Z.); (V.V.M.); (M.D.T.); (S.L.D.); (N.N.M.)
| | | | - Nataliya N. Mochulskaya
- Department of Organic and Biomolecular Chemistry, Ural Federal University, 620002 Yekaterinburg, Russia; (R.F.F.); (I.I.B.); (A.D.S.); (A.P.P.); (N.J.M.); (G.V.Z.); (V.V.M.); (M.D.T.); (S.L.D.); (N.N.M.)
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Anjali Jha, Sen A, Malla RR. Chemistry of Oxadiazole Analogues: Current Status and Applications. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2021. [DOI: 10.1134/s1068162021030092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Synthesis of 2-(4-hydroxyphenyl)ethyl 3,4,5-Trihydroxybenzoate and Its Inhibitory Effect on Sucrase and Maltase. Processes (Basel) 2020. [DOI: 10.3390/pr8121603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We report on the synthesis of an active component, 2-(4-hydroxyphenyl)ethyl 3,4,5-trihydroxybenzoate (HETB), from Rhodiola crenulata. Subsequent analysis revealed that HETB exhibits α-glucosidase inhibitory activities on maltase and sucrase, with potency exceeding that of the known α-glucosidase inhibitors (voglibose and acarbose). An inhibition kinetics study revealed that HETB, acarbose, and voglibose bind to maltase and sucrase, and HETB was shown to be a strong competitive inhibitor of maltase and sucrase. In a molecular docking study based on the crystal structure of α-glucosidase from Saccharomyces cerevisiae, we revealed the HETB binding in the active site of maltase via hydrogen-bond interactions with five amino acid residues: Ser 240, Asp 242, Glu 277, Arg 315, and Asn 350. For HETB docked to the sucrase active site, seven hydrogen bonds (with Asn 114, Glu 148, Gln 201, Asn 228, Gln 381, Ile 383, and Ser 412) were shown.
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Liu WY, Chen LY, Huang YY, Fu L, Song LY, Wang YY, Bai Z, Meng FF, Bi YF. Antioxidation and active constituents analysis of flower residue of Rosa damascena. CHINESE HERBAL MEDICINES 2020; 12:336-341. [PMID: 36119007 PMCID: PMC9476380 DOI: 10.1016/j.chmed.2020.05.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 05/20/2020] [Accepted: 05/28/2020] [Indexed: 02/06/2023] Open
Abstract
Objective To make full usage of resource and turn waste into treasure, the chemical constituents and bioactivity were firstly investigated on Damask rose (Rosa damascena) flower residue (DRFR). Methods DPPH and ABTS experiments were applied to assess the antioxidant activity of DRFR. Then, column chromatography was used to purify compounds from an antioxidation extract (DRFR-A), and the chemical structure was identified using NMR. The total phenolic acid content was measured by Folin-Ciocalteu colorimetric method, and the content of gallic acid of the indicator ingredient was detected by HPLC. Results DRFR-A was found to show a high activity both on DPPH (IC50: 2.760 µg/mL) and ABTS (IC50: 2.258 µg/mL) compared to positive control VC. Ten compounds were isolated and identified as quercetin (1), kaempferol (2), gallic acid (3), protocatechuic acid (4), pyrogallic acid (5), 2-phenylethyl 3,4,5-trihydroxybenzoate (6), methyl gallate (7), p-hydroxybenzoic acid (8), p-hydroxyphenethyl alcohol (9) and astragalin (10) from DRFR-A. Among them, pyrogallic acid, 2-phenylethyl-3, 4, 5-trihydroxybenzoate, p-hydroxybenzoic acid and p-hydroxyphenethyl alcohol are obtained from the plant for the first time. The content of total phenolic acids and gallic acid, main ingredient in DRFR-A was determined as 63.73% and 24.67%, respectively. Conclusion This study provides a reliable data and lays the foundation for the development and utilization of rose residue, and hence for the full utilization of rose resources.
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Tu Z, Gong W, Zhang Y, Feng Y, Liu Y, Tu C. Inhibition of Rabies Virus by 1,2,3,4,6-Penta- O-galloyl-β-d-Glucose Involves mTOR-Dependent Autophagy. Viruses 2018; 10:v10040201. [PMID: 29673174 PMCID: PMC5923495 DOI: 10.3390/v10040201] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 04/04/2018] [Accepted: 04/14/2018] [Indexed: 12/25/2022] Open
Abstract
The compound 1,2,3,4,6-penta-O-galloyl-β-d-glucose (PGG), a gallotannin present in various plants such as Rhus chinensis Mill and Paeonia suffruticosa, has a broad spectrum of antiviral effects. The present study investigated its potency against infection of mice with rabies virus (RABV). Results demonstrated that PGG strongly inhibited virus titers (50-fold), viral mRNA expression (up to 90%), and protein synthesis in vitro. Importantly, we found that PGG not only suppressed viral adsorption and entry, but also directly inactivated RABV through suppression of autophagy by mediating activation of the mTOR-dependent autophagy signaling pathway. In vivo, PGG (10 mg/kg) alleviated the clinical symptoms and reduced the mortality of infected mice by 27.3%. Collectively, our results indicate that PGG has potent anti-RABV effect, and merits further investigation as an anti-RABV drug.
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Affiliation(s)
- Zhongzhong Tu
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Jilin 130122, China.
| | - Wenjie Gong
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Jilin 130122, China.
| | - Yan Zhang
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Jilin 130122, China.
| | - Ye Feng
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Jilin 130122, China.
| | - Yan Liu
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Jilin 130122, China.
| | - Changchun Tu
- Key Laboratory of Jilin Province for Zoonosis Prevention and Control, Institute of Military Veterinary Medicine, Academy of Military Medical Sciences, Jilin 130122, China.
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Immunoregulatory and anti-HIV-1 enzyme activities of antioxidant components from lotus (Nelumbo nucifera Gaertn.) rhizome. Biosci Rep 2015; 31:381-90. [PMID: 21114474 DOI: 10.1042/bsr20100062] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In the present study, two antioxidant micromolecular components (L2f-2 and L2f-3) and an antioxidant macromolecular component LB2 were extracted from lotus (Nelumbo nucifera Gaertn.) rhizomes. MS, FTIR (Fourier-transform IR) spectroscopy and NMR were used to identify these compounds. L2f-2 was (+/-)-gallocatechin, L2f-3 was (-)-catechin and LB2 was a polysaccharide-protein complex with a molecular mass of 18.8 kDa. LB2 was identified as a polysaccharide sulfate containing α/β-pyranose and α-furanose according to its FTIR spectrogram. It was composed of mannose, rhamnose, glucose, galactose and xylose with a molar ratio 2:8:7:8:1. The antioxidant components L2f-2, L2f-3 and LB2 strongly inhibited HIV-1 RT (reverse transcriptase) and IN (integrase). LB2 inhibited RT with an IC50 value of 33.7 μM. It also exhibited the highest HIV-1 3'-processing inhibitory activity with an IC50 value of 5.28 μM. Both L2f-2 and L2f-3 up-regulated the expression of IL-2 (interleukin-2) and down-regulated IL-10, while LB2 exhibited positive regulation on IL-2, IL-4 and IL-10. Moreover, L2f-3 and LB2 might inhibit HIV-1 directly by down-regulating TNFα (tumour necrosis factor α). These natural antioxidant components with antiviral and immunoregulatory activities could be potentially important for anti HIV-1 drug development and application to HIV-1 therapy.
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Wang CR, Zhou R, Ng TB, Wong JH, Qiao WT, Liu F. First report on isolation of methyl gallate with antioxidant, anti-HIV-1 and HIV-1 enzyme inhibitory activities from a mushroom (Pholiota adiposa). ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2014; 37:626-637. [PMID: 24572641 DOI: 10.1016/j.etap.2014.01.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 01/13/2014] [Accepted: 01/24/2014] [Indexed: 06/03/2023]
Abstract
In this study, a compound with antioxidant and anti-HIV activities designated as HEB was first isolated from the edible mushroom Pholiota adiposa by extraction with ethanol and ethyl acetate. HEB was then purified by high performance liquid chromatography (HPLC) and identified to be methyl gallate (C8H8O5, 184.1 Da) based on data from its mass spectrum (MS) and nuclear magnetic resonance (NMR) spectrum. HEB displayed strong antioxidant potency in inhibiting, at 1.36 mM concentration, erythrocyte hemolysis and scavenging DPPH radicals and superoxide anion (O2(-)) by 82.4%, 85.6% and 71.4%, respectively. Besides exhibiting a low cytotoxicity, compound HEB demonstrated significant anti-HIV activity in that it inhibited HIV-1 replication in TZM-BL cells infected by pseudovirus with an IC50 value of 11.9 μM. Further study disclosed that HEB inhibited the viral entry process and activities of key enzymes essential for the HIV-1 life cycle. HEB inhibited HIV-1 reverse transcriptase and integrase activities with an IC50 value of 80.1 μM and 228.5 μM, respectively, and at 10 mM concentration inhibited HIV-1 protease activity by 17.1% which was higher than that achieved by the positive control pepstatin A. Interestingly, this study first revealed that H2O2 stimulation not only activated cell oxidative stress responses, but also accelerated HIV-1 long terminal repeat (LTR) promotion in TZM-BL cells, which was significantly reduced by HEB from 18.2% to about 2%. It implied a direct relationship between the antioxidant and anti-HIV activities of the natural active constituent HEB. Nuclear transcription factor kappa B (NF-κB) signal pathways plays an important role in oxidative stress responses. Meanwhile, there is κB target sequence in HIV promoter LTR which is significant for virus replication and gene expression. In this study, Western Blot assay showed that HEB could inhibit the activation of NF-κB signal pathway stimulated by H2O2 in mouse spleen cells through suppressing NF-κB (p65) translocation into nucleus and NF-kappa-B inhibitor (IκB) degradation in cytoplasm. In summary, the antioxidant HEB from P. adiposa could inhibit HIV-1 replication through multiple target sites. The data suggest that natural antioxidant compounds might have a potential for treatment of AIDS.
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Affiliation(s)
- Chang Rong Wang
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China
| | - Rong Zhou
- Department of Microbiology, College of Life Science, Nankai University, Tianjin 300071, China
| | - Tzi Bun Ng
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.
| | - Jack Ho Wong
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Wen Tao Qiao
- Department of Microbiology, College of Life Science, Nankai University, Tianjin 300071, China
| | - Fang Liu
- Department of Microbiology, College of Life Science, Nankai University, Tianjin 300071, China.
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Discovery of 1,3,4-oxidiazole scaffold compounds as inhibitors of superoxide dismutase expression. Bioorg Med Chem Lett 2014; 24:1532-7. [DOI: 10.1016/j.bmcl.2014.01.078] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 01/25/2014] [Accepted: 01/28/2014] [Indexed: 12/12/2022]
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Khandelwal A, Hall JA, Blagg BSJ. Synthesis and structure-activity relationships of EGCG analogues, a recently identified Hsp90 inhibitor. J Org Chem 2013; 78:7859-84. [PMID: 23834230 DOI: 10.1021/jo401027r] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Epigallocatechin-3-gallate (EGCG), the principal polyphenol isolated from green tea, was recently shown to inhibit Hsp90; however, structure-activity relationships for this natural product have not yet been produced. Herein, we report the synthesis and biological evaluation of EGCG analogues to establish structure-activity relationships between EGCG and Hsp90. All four rings as well as the linker connecting the C- and the D-rings were systematically investigated, which led to the discovery of compounds that inhibit Hs90 and display improvement in efficacy over EGCG. Antiproliferative activity of all the analogues was determined against MCF-7 and SKBr3 cell lines and Hsp90 inhibitory activity of the four most potent analogues was further evaluated by Western blot analyses and degradation of Hsp90-dependent client proteins. The prenyl-substituted aryl ester of 3,5-dihydroxychroman-3-ol ring system was identified as a novel scaffold that exhibits Hsp90 inhibitory activity.
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Affiliation(s)
- Anuj Khandelwal
- Department of Medicinal Chemistry, The University of Kansas, 1251 Wescoe Hall Drive, Malott 4070, Lawrence, Kansas 66045-7563, USA
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Zhao Y, Jiang F, Liu P, Chen W, Yi K. Catechins containing a galloyl moiety as potential anti-HIV-1 compounds. Drug Discov Today 2012; 17:630-5. [DOI: 10.1016/j.drudis.2012.02.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Revised: 02/16/2012] [Accepted: 02/28/2012] [Indexed: 01/19/2023]
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Mandhane PG, Joshi RS, Khan W, Gill CH. Synthesis and Antibacterial Evaluation of Some Novel 1,3,4-oxadiazol Derivatives Incorporated with Quinoline Moiety. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2011. [DOI: 10.5012/jkcs.2011.55.4.656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Javanbakht H, Ptak R, Chow E, Yan J, Russell J, Mankowski M, Hogan P, Hogg J, Vora H, Hang J, Li Y, Su G, Paul A, Cammack N, Klumpp K, Heilek G. In vitro resistance development for RO-0335, a novel diphenylether nonnucleoside reverse transcriptase inhibitor. Antiviral Res 2010; 86:212-9. [DOI: 10.1016/j.antiviral.2010.02.323] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2009] [Revised: 02/12/2010] [Accepted: 02/23/2010] [Indexed: 10/19/2022]
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The remarkable frequency of human immunodeficiency virus type 1 genetic recombination. Microbiol Mol Biol Rev 2009; 73:451-80, Table of Contents. [PMID: 19721086 DOI: 10.1128/mmbr.00012-09] [Citation(s) in RCA: 125] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The genetic diversity of human immunodeficiency virus type 1 (HIV-1) results from a combination of point mutations and genetic recombination, and rates of both processes are unusually high. This review focuses on the mechanisms and outcomes of HIV-1 genetic recombination and on the parameters that make recombination so remarkably frequent. Experimental work has demonstrated that the process that leads to recombination--a copy choice mechanism involving the migration of reverse transcriptase between viral RNA templates--occurs several times on average during every round of HIV-1 DNA synthesis. Key biological factors that lead to high recombination rates for all retroviruses are the recombination-prone nature of their reverse transcription machinery and their pseudodiploid RNA genomes. However, HIV-1 genes recombine even more frequently than do those of many other retroviruses. This reflects the way in which HIV-1 selects genomic RNAs for coencapsidation as well as cell-to-cell transmission properties that lead to unusually frequent associations between distinct viral genotypes. HIV-1 faces strong and changeable selective conditions during replication within patients. The mode of HIV-1 persistence as integrated proviruses and strong selection for defective proviruses in vivo provide conditions for archiving alleles, which can be resuscitated years after initial provirus establishment. Recombination can facilitate drug resistance and may allow superinfecting HIV-1 strains to evade preexisting immune responses, thus adding to challenges in vaccine development. These properties converge to provide HIV-1 with the means, motive, and opportunity to recombine its genetic material at an unprecedented high rate and to allow genetic recombination to serve as one of the highest barriers to HIV-1 eradication.
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Theo A, Masebe T, Suzuki Y, Kikuchi H, Wada S, Obi CL, Bessong PO, Usuzawa M, Oshima Y, Hattori T. Peltophorum Africanum, a Traditional South African Medicinal Plant, Contains an Anti HIV-1 Constituent, Betulinic Acid. TOHOKU J EXP MED 2009; 217:93-9. [DOI: 10.1620/tjem.217.93] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Andros Theo
- Laboratory of Emerging Infectious Diseases, Internal Medicine, Graduate School of Medicine, Tohoku University
| | - Tracy Masebe
- Department of Microbiology, University of Venda, Thohoyandou, Limpopo Province
| | - Yasuhiro Suzuki
- Laboratory of Emerging Infectious Diseases, Internal Medicine, Graduate School of Medicine, Tohoku University
| | | | - Shoko Wada
- Graduate School of Pharmaceutical Sciences, Tohoku University
| | | | | | - Motoki Usuzawa
- Laboratory of Emerging Infectious Diseases, Internal Medicine, Graduate School of Medicine, Tohoku University
- Japan Foundation for AIDS Prevention
| | | | - Toshio Hattori
- Laboratory of Emerging Infectious Diseases, Internal Medicine, Graduate School of Medicine, Tohoku University
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Hasegawa T, Takano F, Takata T, Niiyama M, Ohta T. Bioactive monoterpene glycosides conjugated with gallic acid from the leaves of Eucalyptus globulus. PHYTOCHEMISTRY 2008; 69:747-753. [PMID: 17936865 DOI: 10.1016/j.phytochem.2007.08.030] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2007] [Revised: 07/23/2007] [Accepted: 08/27/2007] [Indexed: 05/25/2023]
Abstract
Two monoterpene glycosides, conjugated with gallic acid [globulusin A (1) and B (2)], together with four known compounds, cypellocarpin A (3), eucaglobulin (4), cuniloside (5) and (1S, 2S, 4R)-trans-2-hydroxy-1,8-cineole beta-d-glucopyranoside (6), were isolated from hot-water extracts of the leaves of Eucalyptus globulus. The structures of compounds 1 and 2 were determined by 1D, 2D NMR and MS spectroscopic analyses. The absolute stereochemistry of 1 was determined by correlating the spectroscopic data with those of synthetic compound 6 with a known configuration. Globulusin A (1) and B (2), cypellocarpin A (3) and eucaglobulin (4), scavenged DPPH free radicals and globulusin A (1) showed a higher antioxidant activity than the other tested compounds, with an IC50 of 3.8microM. Globulusin A (1) and eucaglobulin (4) concentration-dependently suppressed inflammatory cytokine production, tumor-necrosis factor-alpha and interleukin-1beta in cultured human myeloma THP-1 cells co-stimulated with phorbol myristate acetate. These compounds also inhibited melanogenesis in cultured murine melanoma B16F1 cells, without any significant cytotoxicity. These results suggested that globulusin A (1) and eucaglobulin (4), which were isolated as antioxidants from E. globulus, also had anti-inflammatory as well as anti-melanogenesis activity.
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MESH Headings
- Animals
- Anti-Inflammatory Agents, Non-Steroidal/chemistry
- Anti-Inflammatory Agents, Non-Steroidal/isolation & purification
- Anti-Inflammatory Agents, Non-Steroidal/pharmacology
- Antineoplastic Agents, Phytogenic/chemistry
- Antineoplastic Agents, Phytogenic/isolation & purification
- Antineoplastic Agents, Phytogenic/pharmacology
- Antioxidants/chemistry
- Antioxidants/isolation & purification
- Antioxidants/pharmacology
- Cell Line, Tumor
- Cell Survival/drug effects
- Cyclohexanecarboxylic Acids/chemistry
- Cyclohexanecarboxylic Acids/isolation & purification
- Cyclohexanecarboxylic Acids/pharmacology
- Cytokines/biosynthesis
- Cytokines/drug effects
- Dose-Response Relationship, Drug
- Drug Screening Assays, Antitumor
- Eucalyptus/chemistry
- Gallic Acid/chemistry
- Gallic Acid/isolation & purification
- Gallic Acid/pharmacology
- Glucosides/chemistry
- Glucosides/isolation & purification
- Glucosides/pharmacology
- Glycosides/chemistry
- Glycosides/isolation & purification
- Glycosides/pharmacology
- Humans
- Hydrolyzable Tannins/chemistry
- Hydrolyzable Tannins/isolation & purification
- Hydrolyzable Tannins/pharmacology
- Melanins/antagonists & inhibitors
- Melanins/metabolism
- Melanoma, Experimental/drug therapy
- Melanoma, Experimental/metabolism
- Mice
- Molecular Conformation
- Monoterpenes/chemistry
- Monoterpenes/isolation & purification
- Monoterpenes/pharmacology
- Plant Leaves/chemistry
- Stereoisomerism
- Terpenes/chemistry
- Terpenes/isolation & purification
- Terpenes/pharmacology
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Affiliation(s)
- Tatsuya Hasegawa
- Department of Pharmacognosy and Chemistry of Natural Products, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan
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16
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Lee CW, Son EM, Kim HS, Xu P, Batmunkh T, Lee BJ, Koo KA. Synthetic tyrosyl gallate derivatives as potent melanin formation inhibitors. Bioorg Med Chem Lett 2007; 17:5462-4. [PMID: 17693086 DOI: 10.1016/j.bmcl.2007.07.032] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2007] [Revised: 06/14/2007] [Accepted: 07/09/2007] [Indexed: 11/23/2022]
Abstract
Three tyrosyl gallate derivatives (1-3) with variable hydroxyl substituent at the aromatic ring of tyrosol were synthesized and evaluated as potent inhibitors on tyrosinase activity and melanin formation in melan-a cells. Among three tyrosyl gallate derivatives, 4-hydroxyphenethyl 3,4,5-trihydroxybenote (1) (IC(50)=4.93 microM), 3-hydroxyphenethyl 3,4,5-trihydroxybenote (2) (IC(50)=15.21 microM), and 2-hydroxyphenethyl 3,4,5-trihydroxybenote (3) (IC(50)=14.50 microM) exhibited significant inhibitory effect on tyrosinase activity. Compound 1 was the most active compound, though it did not show the inhibitory effect on melanin formation in melan-a cells. However, compounds 2 (IC(50)=8.94 microM) and 3 (IC(50)=13.67 microM) significantly suppressed the cellular melanin formation without cytotoxicity. This study shows that the position of hydroxyl substituent at the aromatic ring of tyrosol plays an important role in the intracellular regulation of melanin formation in cell-based assay system.
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Affiliation(s)
- Chan Woo Lee
- R&D Center, AmorePacific Corporation, Kyounggi-do 449-729, Republic of Korea
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17
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Chávez JH, Leal PC, Yunes RA, Nunes RJ, Barardi CRM, Pinto AR, Simões CMO, Zanetti CR. Evaluation of antiviral activity of phenolic compounds and derivatives against rabies virus. Vet Microbiol 2006; 116:53-9. [PMID: 16697126 DOI: 10.1016/j.vetmic.2006.03.019] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2005] [Revised: 03/07/2006] [Accepted: 03/27/2006] [Indexed: 11/18/2022]
Abstract
Human rabies is a viral disease with a great impact on public health, mainly on account of its fatal course in the majority of cases. Despite the well-established prophylaxis by immunization, rabies is believed to be responsible for 40,000-70,000 human deaths per year, mostly in endemic areas. Palliative support and experimental protocols to avoid death have been employed with no expressive results, with the exception of a recent human case of recovery from rabies. No antiviral drugs are currently available to fight against this infection. In combination with the prophylaxis, an antiviral drug would be useful for human rabies treatment, providing enhanced protection against the encephalitis caused by the virus. Phenolic compounds are derived from the secondary plant metabolism, although they can also be obtained by synthetic processes. Many studies have shown a great range of pharmacological effects for these substances, including vasodilatation, antiallergenic, antiinflammatory and antiviral properties, among others. In this study, the potential in-vitro anti-rabies activity of 24 synthetic phenolic compounds was evaluated using McCoy cells and PV rabies strain. The cytotoxicity (CC50) was assayed by the MTT method and the antiviral activity (IC50) was estimated by the inhibition of viral cytopathic effects. Isoprinosine and ketamine were used as positive controls. The tested compounds showed selectivity indices (SI=CC50/IC50) ranging from 1.0 to 3.9. Six phenolic compounds failed to inhibit the cytopathic effect to any degree, and four showed SI > or = 3.0. According to these results, some probable structure-activity relationships are suggested. It was observed that the presence of free hydroxyl and ether groups influenced the anti-rabies activity. However, additional studies are required to establish these relationships.
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Affiliation(s)
- Juliana H Chávez
- Laboratório de Imunologia Aplicada, Departamento de Microbiologia e Parasitologia, CCB, Universidade Federal de Santa Catarina, Florianópolis 88040-900, SC, Brazil
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18
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Asres K, Seyoum A, Veeresham C, Bucar F, Gibbons S. Naturally derived anti-HIV agents. Phytother Res 2005; 19:557-81. [PMID: 16161055 DOI: 10.1002/ptr.1629] [Citation(s) in RCA: 111] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The urgent need for new anti-HIV/AIDS drugs is a global concern. In addition to obvious economical and commercial hurdles, HIV/AIDS patients are faced with multifarious difficulties associated with the currently approved anti-HIV drugs. Adverse effects, the emergence of drug resistance and the narrow spectrum of activity have limited the therapeutic usefulness of the various reverse transcriptase and protease inhibitors that are currently available on the market. This has driven many scientists to look for new anti-retrovirals with better efficacy, safety and affordability. As has always been the case in the search for cures, natural sources offer great promise. Several natural products, mostly of plant origin have been shown to possess promising activities that could assist in the prevention and/or amelioration of the disease. Many of these anti-HIV agents have other medicinal values as well, which afford them further prospective as novel leads for the development of new drugs that can deal with both the virus and the various disorders that characterize HIV/AIDS. The aim of this review is to report new discoveries and updates pertaining to anti-HIV natural products. In the review anti-HIV agents have been classified according to their chemical classes rather than their target in the HIV replicative cycle, which is the most frequently encountered approach. Perusal of the literature revealed that most of these promising naturally derived anti-HIV compounds are flavonoids, coumarins, terpenoids, alkaloids, polyphenols, polysaccharides or proteins. It is our strong conviction that the results and experiences with many of the anti-HIV natural products will inspire and motivate even more researchers to look for new leads from plants and other natural sources.
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Affiliation(s)
- Kaleab Asres
- Department of Pharmacognosy, School of Pharmacy, Addis Ababa University, P.O. Box 1176, Addis Ababa, Ethiopia
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19
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Bessong PO, Obi CL, Andréola ML, Rojas LB, Pouységu L, Igumbor E, Meyer JJM, Quideau S, Litvak S. Evaluation of selected South African medicinal plants for inhibitory properties against human immunodeficiency virus type 1 reverse transcriptase and integrase. JOURNAL OF ETHNOPHARMACOLOGY 2005; 99:83-91. [PMID: 15848024 DOI: 10.1016/j.jep.2005.01.056] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2004] [Revised: 01/05/2005] [Accepted: 01/28/2005] [Indexed: 05/24/2023]
Abstract
Seventeen aqueous and methanol extracts from nine South African medicinal plants, ethnobotanically selected, were screened for inhibitory properties against HIV-1 reverse transcriptase (RT). Isolated compounds were additionally evaluated on HIV-1 integrase (IN). The strongest inhibition against the RNA-dependent-DNA polymerase (RDDP) activity of RT was observed with the methanol extract of the stem-bark of Peltophorum africanum Sond. (Fabaceae) (IC(50) 3.5 microg/ml), while the methanol extract of the roots of Combretum molle R.Br. ex G. Don (Combretaceae) was the most inhibitory on the ribonuclease H (RNase H) activity (IC(50) 9.7 microg/ml). The known compounds bergenin and catechin, and a red coloured gallotannin composed of meta-depside chains of gallic and protocatechuic acids esterified to a 1-O-isobutyroly-beta-D-glucopyranose core, were isolated from the methanol extract of the roots and stem-bark of Peltophorum africanum. The gallotannin inhibited the RDDP and RNase H functions of RT with IC(50) values of 6.0 and 5.0 microM, respectively, and abolished the 3'-end processing activity of IN at 100 microM. Catechin showed no effect on RT but had a moderate activity on HIV-1 IN. Bergenin was inactive on both enzymes. The aqueous and methanol extracts were non-toxic in a HeLaP4 cell line at a concentration of 400 microg/ml.
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Affiliation(s)
- Pascal Obong Bessong
- Department of Microbiology, University of Venda for Science and Technology, PMB X5050, Thohoyandou 0950, South Africa.
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20
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Negi AS, Darokar MP, Chattopadhyay SK, Garg A, Bhattacharya AK, Srivastava V, Khanuja SPS. Synthesis of a novel plant growth promoter from gallic acid. Bioorg Med Chem Lett 2005; 15:1243-7. [PMID: 15686951 DOI: 10.1016/j.bmcl.2004.11.079] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2004] [Accepted: 11/24/2004] [Indexed: 11/19/2022]
Abstract
Gallic acid has been modified to naphthophenone derivatives with esterified fatty acid side chain. Compound 12, an ethyl crotonate ester of naphthophenone derivative has shown potent auxin like growth promoter activity. This is the first example of naphthophenone derivatives with plant growth promoting activity.
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Affiliation(s)
- Arvind Singh Negi
- Central Institute of Medicinal and Aromatic Plants (CIMAP), PO CIMAP, Kukrail Road, Lucknow 226015, India.
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