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Thi Thu HN, Minh QP, Van CP, Van TN, Van KP, Thanh TN, Le Thi Tu A, Litaudon M, The SN. Cytotoxic and α-Glucosidase Inhibitory Xanthones from Garcinia mckeaniana Leaves and Molecular Docking Study. Chem Biodivers 2021; 18:e2100396. [PMID: 34529335 DOI: 10.1002/cbdv.202100396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 09/16/2021] [Indexed: 11/11/2022]
Abstract
A new racemic xanthone, garmckeanin A (1), and eight known analogs 2-9 were isolated from the ethyl acetate (AcOEt) extract of the Vietnamese Garcinia mckeaniana leaves. Their structures were determined by MS and NMR spectral analyses and compared with the literature. The AcOEt extract showed good cytotoxicity against cancer cell lines KB, Lu, Hep-G2 and MCF7, with IC50 values of 5.40-8.76 μg/mL, and it also possessed α-glucosidase inhibitory activity, with an IC50 value of 9.17 μg/mL. Garmckeanin A (1) exhibited inhibition of all cancer cell lines, with an IC50 value of 7.3-0.9 μM. Allanxanthone C (5) successfully controlled KB growth, with an IC50 value of 0.54 μM, higher than that of the positive control, ellipticine (IC50 1.22 μM). Norathyriol (8) was a promising α-glucosidase inhibitor, with an IC50 value of 0.07 μM, much higher than that of the positive control, acarbose (IC50 161.0 μM). The interactions of the potential α-glucosidase inhibitors with the C- and N-terminal domains of human intestinal α-glucosidase were also investigated by molecular docking study. The results indicated that bannaxanthone D (2), garcinone E (4), bannaxanthone E (6), and norathyriol (8) exhibit higher binding affinity to the C-terminal than to the N-terminal domain through essential residues in the active sites. In particular, compound 8 could be assumed to be the most potent mixed inhibitor.
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Affiliation(s)
- Ha Nguyen Thi Thu
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, 100000, Vietnam.,Graduate University of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, 100000, Vietnam
| | - Quan Pham Minh
- Graduate University of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, 100000, Vietnam.,Institute of Natural Products Chemistry (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, 100000, Vietnam
| | - Cuong Pham Van
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, 100000, Vietnam
| | - Tuyen Nguyen Van
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, 100000, Vietnam
| | - Kiem Phan Van
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, 100000, Vietnam
| | - Tra Nguyen Thanh
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, 100000, Vietnam.,Graduate University of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, 100000, Vietnam
| | - Anh Le Thi Tu
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, 100000, Vietnam
| | - Marc Litaudon
- Institute of Chemistry of Natural Substances, CNRS-ICSN, UPR 2301, Université Paris-Sud, 91198, Gif-sur-Yvette, France
| | - Son Ninh The
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Caugiay, Hanoi, 100000, Vietnam
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Nguyen TTH, Nguyen VT, Van Cuong P, Nguyen Thanh T, Le Thi TA, Mai Huong DT, Truong BN, Litaudon M, Ninh The S. A new flavonoid from the leaves of Garcinia mckeaniana Craib and α-glucosidase and acetylcholinesterase inhibitory activities. Nat Prod Res 2021; 36:5074-5080. [PMID: 33939580 DOI: 10.1080/14786419.2021.1916019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 01/18/2023]
Abstract
From the ethyl acetate extract (EtOAc) of the Vietnamese Garcinia mckeaniana leaves, a new flavone 8-C-glycoside 2'',6''-di-O-acetylvitexin (1), together with six known analogs 2-7 were isolated. Their structures were determined by spectral methods and compared with literature data. In α-glucosidase inhibitory assay, the EtOAc extract and its flavone and biflavone derivatives possessed the significant IC50 range of 9.17-97.53 µM, as compared with that of the positive control acarbose (249 µM). Flavones and biflavones showed are better than flavone glycosides in both α-glucosidase and acetylcholinesterase inhibitory activities.
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Affiliation(s)
- Thi Thu Ha Nguyen
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam.,Faculty of Chemistry, Graduate University of Science and Technology, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Van Tuyen Nguyen
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam.,Faculty of Chemistry, Graduate University of Science and Technology, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Pham Van Cuong
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Tra Nguyen Thanh
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam.,Faculty of Chemistry, Graduate University of Science and Technology, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Tu Anh Le Thi
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Doan Thi Mai Huong
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Bich Ngan Truong
- Institute of Marine Biochemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
| | - Marc Litaudon
- French National Centre for Scientific Research, Paris, France
| | - Son Ninh The
- Institute of Chemistry, Vietnam Academy of Science and Technology (VAST), Hanoi, Vietnam
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Nguyen Thi Thu H, Pham Van C, Nguyen Thanh T, Le Thi Tu A, Ba Thi C, Ninh The S. chemical constituents from methanolic extract of Garcinia mackeaniana leaves and their antioxidant activity. ACTA ACUST UNITED AC 2020. [DOI: 10.15625/2525-2518/58/4/14680] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A phytochemical investigation of the methanolic extract of Garcinia mackeaniana leaves led to the isolation, and determination of five secondary metabolites, including one benzophenone 4,3',4'-trihydroxy-2,6-dimethoxybenzophenone (1), two flavone C-glucosides vitexin (2) and its 2''-O-acetyl derivative (3), one biflavone amentoflavone (4), and one mono-phenol methyl protocatechuate (5). The chemical structures of these compounds were characterized by the NMR-spectroscopic method. These isolated compounds were isolated from G. mackeaniana species for the first time. Benzophenone derivative 1 has shown to be associated with a significant IC50 value of 14.97±0.8 µg/mL in the DPPH-antioxidant assay.
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Khusnutdinova EF, Petrova AV, Thu HNT, Tu ALT, Thanh TN, Thi CB, Babkov DA, Kazakova OB. Structural modifications of 2,3-indolobetulinic acid: Design and synthesis of highly potent α-glucosidase inhibitors. Bioorg Chem 2019; 88:102957. [DOI: 10.1016/j.bioorg.2019.102957] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 04/17/2019] [Accepted: 04/28/2019] [Indexed: 12/14/2022]
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Thi TP, Decuyper L, Quang TL, The CP, Dang Thi TA, Nguyen HT, Le Nhat TG, Thanh TN, Thi PH, D’hooghe M, Van Nguyen T. Synthesis and cytotoxic evaluation of novel indenoisoquinoline-propan-2-ol hybrids. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2015.12.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ping Wang Y, Letoublon A, Nguyen Thanh T, Bahri M, Largeau L, Patriarche G, Cornet C, Bertru N, Le Corre A, Durand O. Quantitative evaluation of microtwins and antiphase defects in GaP/Si nanolayers for a III-V photonics platform on silicon using a laboratory X-ray diffraction setup. J Appl Crystallogr 2015; 48:702-710. [PMID: 26089763 PMCID: PMC4453976 DOI: 10.1107/s1600576715009954] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [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: 11/14/2014] [Accepted: 05/22/2015] [Indexed: 12/02/2022] Open
Abstract
A laboratory X-ray diffraction setup is reported, which allows quantitative characterization of the microtwin and antiphase domain densities in epitaxial GaP/Si thin layers. This study is carried out in the context of III–V semiconductor monolithic integration on silicon for optoelectronic device applications. X-ray diffraction is combined with atomic force microscopy and scanning transmission electron microscopy for structural characterization of GaP nanolayers grown on Si. GaP has been chosen as the interfacial layer, owing to its low lattice mismatch with Si. But, microtwins and antiphase boundaries are still difficult to avoid in this system. Absolute quantification of the microtwin volume fraction is used for optimization of the growth procedure in order to eliminate these defects. Lateral correlation lengths associated with mean antiphase boundary distances are then evaluated. Finally, optimized growth conditions lead to the annihilation of antiphase domains within the first 10 nm.
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Affiliation(s)
- Yan Ping Wang
- UMR FOTON, CNRS, INSA Rennes, Rennes, F35708, France
| | | | - Tra Nguyen Thanh
- Universite Grenoble Alpes, Institu NEEL, Grenoble, F-38000, France ; CNRS, Institut NEEL, Grenoble, F-38042, France
| | - Mounib Bahri
- Laboratoire de Photonique et Nanostructures, CNRS UPR 20, Route de Nozay, Marcoussis, 91460, France
| | - Ludovic Largeau
- Laboratoire de Photonique et Nanostructures, CNRS UPR 20, Route de Nozay, Marcoussis, 91460, France
| | - Gilles Patriarche
- Laboratoire de Photonique et Nanostructures, CNRS UPR 20, Route de Nozay, Marcoussis, 91460, France
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Robert C, Thanh TN, Cornet C, Turban P, Perrin M, Balocchi A, Folliot H, Bertru N, Pedesseau L, Nestoklon MO, Even J, Jancu JM, Tricot S, Durand O, Marie X, Le Corre A. Theoretical and experimental studies of (In,Ga)As/GaP quantum dots. Nanoscale Res Lett 2012; 7:643. [PMID: 23176537 PMCID: PMC3511258 DOI: 10.1186/1556-276x-7-643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Accepted: 10/24/2012] [Indexed: 06/01/2023]
Abstract
(In,Ga)As/GaP(001) quantum dots (QDs) are grown by molecular beam epitaxy and studied both theoretically and experimentally. The electronic band structure is simulated using a combination of k·p and tight-binding models. These calculations predict an indirect to direct crossover with the In content and the size of the QDs. The optical properties are then studied in a low-In-content range through photoluminescence and time-resolved photoluminescence experiments. It suggests the proximity of two optical transitions of indirect and direct types.
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Affiliation(s)
- Cedric Robert
- Université Européenne de Bretagne, INSA Rennes, France CNRS, UMR 6082 Foton-Ohm, 20 Avenue des Buttes de Coësmes, Rennes, 35708, France
| | - Tra Nguyen Thanh
- Université Européenne de Bretagne, INSA Rennes, France CNRS, UMR 6082 Foton-Ohm, 20 Avenue des Buttes de Coësmes, Rennes, 35708, France
| | - Charles Cornet
- Université Européenne de Bretagne, INSA Rennes, France CNRS, UMR 6082 Foton-Ohm, 20 Avenue des Buttes de Coësmes, Rennes, 35708, France
| | - Pascal Turban
- Equipe de Physique des Surfaces et Interfaces, Institut de Physique de Rennes UMR UR1-CNRS 6251, Université de Rennes 1, Rennes Cedex, F-35042, France
| | - Mathieu Perrin
- Université Européenne de Bretagne, INSA Rennes, France CNRS, UMR 6082 Foton-Ohm, 20 Avenue des Buttes de Coësmes, Rennes, 35708, France
| | - Andrea Balocchi
- Université de Toulouse, INSA-CNRS-UPS, LPCNO, 135 avenue de Rangueil, Toulouse, 31077, France
| | - Herve Folliot
- Université Européenne de Bretagne, INSA Rennes, France CNRS, UMR 6082 Foton-Ohm, 20 Avenue des Buttes de Coësmes, Rennes, 35708, France
| | - Nicolas Bertru
- Université Européenne de Bretagne, INSA Rennes, France CNRS, UMR 6082 Foton-Ohm, 20 Avenue des Buttes de Coësmes, Rennes, 35708, France
| | - Laurent Pedesseau
- Université Européenne de Bretagne, INSA Rennes, France CNRS, UMR 6082 Foton-Ohm, 20 Avenue des Buttes de Coësmes, Rennes, 35708, France
| | - Mikhail O Nestoklon
- Ioffe Physico-Technical Institute, Russian Academy of Sciences, St. Petersburg, 194021, Russia
| | - Jacky Even
- Université Européenne de Bretagne, INSA Rennes, France CNRS, UMR 6082 Foton-Ohm, 20 Avenue des Buttes de Coësmes, Rennes, 35708, France
| | - Jean-Marc Jancu
- Université Européenne de Bretagne, INSA Rennes, France CNRS, UMR 6082 Foton-Ohm, 20 Avenue des Buttes de Coësmes, Rennes, 35708, France
| | - Sylvain Tricot
- Equipe de Physique des Surfaces et Interfaces, Institut de Physique de Rennes UMR UR1-CNRS 6251, Université de Rennes 1, Rennes Cedex, F-35042, France
| | - Olivier Durand
- Université Européenne de Bretagne, INSA Rennes, France CNRS, UMR 6082 Foton-Ohm, 20 Avenue des Buttes de Coësmes, Rennes, 35708, France
| | - Xavier Marie
- Université de Toulouse, INSA-CNRS-UPS, LPCNO, 135 avenue de Rangueil, Toulouse, 31077, France
| | - Alain Le Corre
- Université Européenne de Bretagne, INSA Rennes, France CNRS, UMR 6082 Foton-Ohm, 20 Avenue des Buttes de Coësmes, Rennes, 35708, France
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Hung LQ, Vries PJD, Giao PT, Nam NV, Binh TQ, Chong MT, Quoc NTTA, Thanh TN, Hung LN, Kager PA. Control of malaria: a successful experience from Viet Nam. Bull World Health Organ 2002; 80:660-6. [PMID: 12219158 PMCID: PMC2567582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/26/2023] Open
Abstract
OBJECTIVE To follow malaria prospectively in an ethnic minority commune in the south of Viet Nam with high malaria transmission and seasonal fluctuation, during malaria control interventions using insecticide-treated bednets (ITBNs) and early diagnosis and treatment (EDT) of symptomatic patients. METHODS From 1994 onwards the following interventions were used: distribution of ITBNs to all households with biannual reimpregnation; construction of a health post and appointment of staff trained in microscopic diagnosis and treatment of malaria; regular supply of materials and drugs; annual cross-sectional malaria surveys with treatment of all parasitaemic subjects, and a programme of community involvement and health education. Surveys were held yearly at the end of the rainy season. During the surveys, demographic data were updated. Diagnosis and treatment of malaria were free of charge. Plasmodium falciparum infection was treated with artesunate and P. vivax infection with chloroquine plus primaquine. FINDINGS The baseline survey in 1994 recorded 716 inhabitants. Of the children under 2 years of age, 37% were parasitaemic; 56% of children aged 2-10 years, and 35% of the remaining population were parasitaemic. P. falciparum accounted for 73-79% of these infections. The respective splenomegaly rates for the above-mentioned age groups were 20%, 56%, and 32%. In 1999, the proportion of parasitaemic subjects was 4%, 7% and 1%, respectively, of which P.falciparum contributed 56%. The splenomegaly rate was 0%, 5% and 2%, respectively. CONCLUSIONS A combination of ITBNs and EDT, provided free of charge, complemented by annual diagnosis and treatment during malaria surveys and community involvement with health education successfully brought malaria under control. This approach could be applied to other regions in the south of Viet Nam and provides a sound basis for further studies in other areas with different epidemiological patterns of malaria.
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MESH Headings
- Antimalarials/therapeutic use
- Bedding and Linens/statistics & numerical data
- Child
- Child, Preschool
- Communicable Disease Control/organization & administration
- Female
- Health Education
- Health Knowledge, Attitudes, Practice
- Humans
- Insecticides
- Longitudinal Studies
- Malaria, Falciparum/diagnosis
- Malaria, Falciparum/drug therapy
- Malaria, Falciparum/ethnology
- Malaria, Falciparum/prevention & control
- Malaria, Vivax/diagnosis
- Malaria, Vivax/drug therapy
- Malaria, Vivax/ethnology
- Malaria, Vivax/prevention & control
- Male
- Primaquine/therapeutic use
- Pyrethrins
- Vietnam/epidemiology
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Affiliation(s)
- Le Q Hung
- Division of Infectious Diseases, Tropical Medicine AIDS, Academic Medical Centre, Amsterdam, Netherlands
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Thanh TN, Derenne S, Largeau C, Pons D, Broutin J, Mariotti A, Bocherens H. [Lipids from fossil plants and their relation to modern plants. Example s of Cenomanian flora from Anjou and Bohemia]. J Soc Biol 2000; 194:57-64. [PMID: 11098429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/15/2023]
Abstract
Comparative analyses of lipids from fossil plants and from their extant counterparts were undertaken in order to test the taxonomic significance of lipids in palaeobotany. The comparison between lipids from a fossil Ginkgoaceae, Eretmophyllum andegavense, and its extant counterpart, Ginkgo biloba, revealed the presence of original molecules, dimethoxyalkylcoumarins, in lipids from both plants. Such compounds confirm, on chemical grounds the relationship between these extant and fossil Ginkgoaceaes. Moreover, differences in n-alkane distribution between E. andegavense and E. obtusum which are very similar morphologically, confirm that these fossil plants do not belong to the same species. Furthermore, comparative analyses of a fossil Cheirolepidiaceae, Frenelopsis alata, and its extant counterpart, the Cupressaceae Tetraclinis articulata, revealed some similarities between these two species although they do not belong to the same family. Otherwise, comparative analyses of fungi-infected and uninfected samples of F. alata demonstrated that these micro-organisms can significantly affect the chemical composition of fossil plant lipids. In conclusion, even if chemical analyses alone are not sufficient to determine the genus or species of a given fossil plant, they can precise the taxonomy of some specimens that have been previously studied by palaeobotanists.
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Affiliation(s)
- T N Thanh
- Laboratoire de Biogéochimie Isotopique, Université Paris VI, INRA-CNRS-UMR 7618, Paris, France
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Cheymol J, Chabrier P, Thanh TN, Thizy A, Demozay D, Pillon D. [Comparative toxicity (mammals, insects, acarids) of new S-substituted derivatives of S,S-dimethylphosphoric and thiophosphoric acids]. C R Acad Hebd Seances Acad Sci D 1967; 265:291-4. [PMID: 4963493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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