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Dang PH, Tran TH, Le TH, Do TNV, Nguyen HX, Nguyen MTT, Nguyen NT. A new β-carboline-type alkaloid from the flowers of Calotropis gigantea (L.) W.T.Aiton. Nat Prod Res 2023:1-9. [PMID: 37129020 DOI: 10.1080/14786419.2023.2208259] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
In our antioxidant screening of some Vietnamese plant extracts, the CHCl3-soluble fraction from Calotropis gigantea (L.) W.T.Aiton flowers showed moderate DPPH free radical scavenging activity with an IC50 value of 55.8 μg/mL. Thus, a further phytochemical study was carried out to obtain five alkaloids, including a new β-carboline-type alkaloid, caloside H (1). These known compounds were identified as 5-hydroxy-(2-methoxymethyl)pyridine (2), nicotinic acid (3), p-(acetylamino)phenol (4), and thymine (5). These structures were determined based on the NMR spectroscopic analysis. In antioxidant assay, caloside H at concentration of 100 μM showed DPPH radical scavenging capacity with a percentage of inhibition of 40.2%. In addition, a plausible biosynthetic pathway for the formation of caloside H was proposed based on the Schiff base formation and Mannich-like reaction.
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Affiliation(s)
- Phu H Dang
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
- Research Lab for Drug Discovery and Development, University of Science, Ho Chi Minh City, Vietnam
| | - Tu H Tran
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
- Research Lab for Drug Discovery and Development, University of Science, Ho Chi Minh City, Vietnam
| | - Tho H Le
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
- Research Lab for Drug Discovery and Development, University of Science, Ho Chi Minh City, Vietnam
| | - Truong N V Do
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
- Research Lab for Drug Discovery and Development, University of Science, Ho Chi Minh City, Vietnam
| | - Hai X Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
- Research Lab for Drug Discovery and Development, University of Science, Ho Chi Minh City, Vietnam
| | - Mai T T Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
- Research Lab for Drug Discovery and Development, University of Science, Ho Chi Minh City, Vietnam
| | - Nhan T Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
- Research Lab for Drug Discovery and Development, University of Science, Ho Chi Minh City, Vietnam
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2
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Abstract
Bioactivity-guided isolation of the CHCl3-soluble fraction of the stems of Salacia chinensis L. (Celastraceae) was carried out to obtain a new 7',9-epoxylignan (1) and three 7,9':7',9-diepoxylignans (2-4). The absolute configuration of 1 was elucidated based on NMR and ECD spectroscopic data interpretation. All isolated lignans showed intermediate α-glucosidase inhibitory activity with the IC50 values ranging from 28.5 to 85.6 µM.
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Affiliation(s)
- Nhan T Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam.,Cancer Research Laboratory, University of Science, Ho Chi Minh City, Vietnam
| | - Truc T T Duong
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Phu H Dang
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Hai X Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Tho H Le
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Truong N V Do
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Thinh D Le
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Tu H Tran
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Mai T T Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam.,Cancer Research Laboratory, University of Science, Ho Chi Minh City, Vietnam
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3
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Nguyen MTT, Nguyen HX, Dang PH, Le TH, Do TNV, Omar AM, Awale S, Nguyen NT. Panduratins Q-Y, dimeric metabolites from Boesenbergia rotunda and their antiausterity activities against the PANC-1 human pancreatic cancer cell line. Phytochemistry 2021; 183:112646. [PMID: 33421887 DOI: 10.1016/j.phytochem.2020.112646] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 12/18/2020] [Accepted: 12/22/2020] [Indexed: 06/12/2023]
Abstract
A methanolic extract of the rhizomes of Boesenbergia rotunda showed potent preferential cytotoxicity against PANC-1 human pancreatic cancer cells under nutrient deficiency conditions with a PC50 value of 6.6 μg/mL. Bioactivity-guided phytochemical investigation of the rhizomes of B. rotunda led to the isolation of nine undescribed dimeric metabolites, panduratins Q-Y. Their structures were elucidated based on NMR, MS, and ECD spectroscopic data interpretation. Panduratins Q-S and U-W exhibited potent cytotoxicity towards PANC-1 cell line with the PC50 values ranging from 0.8 to 6.3 μM. Panduratin W, which possessed a cyclohexenylchalcone-linked flavanone skeleton, showed the most cytotoxicity with a PC50 value of 0.8 μM under nutrient-deprived medium.
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Affiliation(s)
- Mai T T Nguyen
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam; Cancer Research Laboratory, University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam; Vietnam National University, Quarter 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam
| | - Hai X Nguyen
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam; Vietnam National University, Quarter 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam
| | - Phu H Dang
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam; Vietnam National University, Quarter 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam
| | - Tho H Le
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam; Vietnam National University, Quarter 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam
| | - Truong N V Do
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam; Vietnam National University, Quarter 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam
| | - Ashraf M Omar
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Suresh Awale
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Nhan T Nguyen
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam; Cancer Research Laboratory, University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam; Vietnam National University, Quarter 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam.
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4
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Dang PH, Dao THX, Le VT, Nguyen CM, Ly TT, Nguyen HX, Le TH, Do TNV, Nguyen MTT, Sun S, Awale S, Nguyen NT. Synthesis of Alkyl Triphenylphosphonium Ostruthin Derivatives as Potential Cytotoxic Candidates. ChemistrySelect 2020. [DOI: 10.1002/slct.202003152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Phu H. Dang
- Faculty of Chemistry University of Science Ho Chi Minh City 72711 Vietnam
- Vietnam National University Ho Chi Minh City 71300 Vietnam
| | - Thien H. X. Dao
- Faculty of Chemistry University of Science Ho Chi Minh City 72711 Vietnam
- Vietnam National University Ho Chi Minh City 71300 Vietnam
| | - Vien T. Le
- Faculty of Chemistry University of Science Ho Chi Minh City 72711 Vietnam
- Vietnam National University Ho Chi Minh City 71300 Vietnam
| | - Chien M. Nguyen
- Faculty of Chemistry University of Science Ho Chi Minh City 72711 Vietnam
- Vietnam National University Ho Chi Minh City 71300 Vietnam
| | - Tin T. Ly
- Faculty of Chemistry University of Science Ho Chi Minh City 72711 Vietnam
- Vietnam National University Ho Chi Minh City 71300 Vietnam
| | - Hai X. Nguyen
- Faculty of Chemistry University of Science Ho Chi Minh City 72711 Vietnam
- Vietnam National University Ho Chi Minh City 71300 Vietnam
| | - Tho H. Le
- Faculty of Chemistry University of Science Ho Chi Minh City 72711 Vietnam
- Vietnam National University Ho Chi Minh City 71300 Vietnam
| | - Truong N. V. Do
- Faculty of Chemistry University of Science Ho Chi Minh City 72711 Vietnam
- Vietnam National University Ho Chi Minh City 71300 Vietnam
| | - Mai T. T. Nguyen
- Faculty of Chemistry University of Science Ho Chi Minh City 72711 Vietnam
- Vietnam National University Ho Chi Minh City 71300 Vietnam
- Cancer Research Laboratory University of Science Ho Chi Minh City 72711 Vietnam
| | - Sijia Sun
- Division of Natural Drug Discovery Institute of Natural Medicine University of Toyama 2630 Sugitani, Toyama 930–0194 Japan
| | - Suresh Awale
- Division of Natural Drug Discovery Institute of Natural Medicine University of Toyama 2630 Sugitani, Toyama 930–0194 Japan
| | - Nhan T. Nguyen
- Faculty of Chemistry University of Science Ho Chi Minh City 72711 Vietnam
- Vietnam National University Ho Chi Minh City 71300 Vietnam
- Cancer Research Laboratory University of Science Ho Chi Minh City 72711 Vietnam
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Nguyen MTT, Nguyen KDH, Dang PH, Nguyen HX, Awale S, Nguyen NT. A new cytotoxic cardenolide from the roots of Calotropis gigantea. Nat Prod Res 2020; 35:5096-5101. [PMID: 32571094 DOI: 10.1080/14786419.2020.1781114] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Bioactivity-guided isolation of the CHCl3-soluble fraction of the roots of Calotropis gigantea was carried out to obtain a new cardenolide glycoside, caloside G. Its absolute structure was elucidated based on NMR and ECD spectroscopic data interpretation. Caloside G showed noteworthy cytotoxicity against the PANC-1 human pancreatic and HeLa human cervical carcinoma cell lines, with the submicromolar IC50 values of 0.038 and 0.09 µM, respectively.
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Affiliation(s)
- Mai T T Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Cancer Research Laboratory, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Khang D H Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Phu H Dang
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Hai X Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Suresh Awale
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, Toyama, Japan
| | - Nhan T Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Cancer Research Laboratory, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
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Le LT, Nguyen TTT, Nguyen TTT, Nguyen MTT, Ung TTD, Tran PD. Front Cover: Investigation on the Growth Mechanism of Cu
2
MoS
4
Nanotube, Nanoplate and its use as a Catalyst for Hydrogen Evolution in Water (Chem. Asian J. 12/2020). Chem Asian J 2020. [DOI: 10.1002/asia.202000576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ly T. Le
- Graduate University of Science and Technology Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi Vietnam
- University of Science and Technology of Hanoi Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi Vietnam
| | - Thao T. T. Nguyen
- University of Science and Technology of Hanoi Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi Vietnam
| | | | - Mai T. T. Nguyen
- Hanoi University of Science and Technology 01 Dai Co Viet Hanoi Vietnam
| | - Thuy T. D. Ung
- Institue of Materials Science Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi Vietnam
| | - Phong D. Tran
- University of Science and Technology of Hanoi Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi Vietnam
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7
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Le LT, Nguyen TTT, Nguyen TTT, Nguyen MTT, Ung TTD, Tran PD. Investigation on the Growth Mechanism of Cu 2 MoS 4 Nanotube, Nanoplate and its use as a Catalyst for Hydrogen Evolution in Water. Chem Asian J 2020; 15:1873-1880. [PMID: 32374519 DOI: 10.1002/asia.202000344] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 05/05/2020] [Indexed: 11/12/2022]
Abstract
Cu2 MoS4 is a ternary transition-metal sulfide that shows great potential in the field of energy conversion and storage, namely catalytic H2 evolution in water and Li-, Na- or Mg-ion battery. In this work, we report on a growth mechanism of the single-crystalline Cu2 MoS4 nanotube from (NH4 )2 MoS4 salt and Cu2 O nanoparticle. By probing the nature and morphology of solid products generated in function of reaction conditions we find that the crystalline Cu(NH4 )MoS4 nanorod is first generated at ambient conditions. The nanorod is then converted into Cu2 MoS4 nanotube under hydrothermal treatment due to the Kirkendall effect or a selective etching of the Cu2 MoS4 core. Extending the hydrothermal treatment causes a collapse of nanotube generating Cu2 MoS4 nanoplate. The catalytic activities of these sulfides are investigated. The Cu2 MoS4 shows superior catalytic activity to that of Cu(NH4 )MoS4 . Catalytic performance of the former largely depends on its morphology. The nanoplate shows superior catalytic activity to the nanotube, thanks to its higher specific electrochemical surface area.
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Affiliation(s)
- Ly T Le
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam.,University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam
| | - Thao T T Nguyen
- University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam
| | - Trang T T Nguyen
- Hanoi University of Science and Technology, 01 Dai Co Viet, Hanoi, Vietnam
| | - Mai T T Nguyen
- Hanoi University of Science and Technology, 01 Dai Co Viet, Hanoi, Vietnam
| | - Thuy T D Ung
- Institue of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam
| | - Phong D Tran
- University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam
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8
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Nguyen MTT, Nguyen KDH, Dang PH, Nguyen HX, Awale S, Nguyen NT. Calosides A-F, Cardenolides from Calotropis gigantea and Their Cytotoxic Activity. J Nat Prod 2020; 83:385-391. [PMID: 31967821 DOI: 10.1021/acs.jnatprod.9b00875] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Phytochemical analysis of the roots of Calotropis gigantea led to the isolation of six new cardenolide glycosides, calosides A-F (1-6), and five known cardenolides (7-11). The structures of 1-6 were elucidated based on NMR and ECD spectroscopic data interpretation. Caloside D (4) is the first naturally occurring example of a cardenolide containing a C-8/C-19 oxygen bridge. In turn, calosides E (5) and F (6) represent the first naturally occurring 3-epi-cannogenol diglycosides having potent cytotoxicity against the PANC-1 cell line (IC50, 0.081 and 0.070 μM, respectively) and HeLa (IC50, both 0.17 μM) cells, under normoglycemic conditions.
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Affiliation(s)
| | | | | | | | - Suresh Awale
- Division of Natural Drug Discovery, Institute of Natural Medicine , University of Toyama , 2630 Sugitani , Toyama 930-0194 , Japan
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Dang PH, Nguyen LTT, Nguyen HTT, Le TH, Do TNV, Nguyen HX, Le ND, Nguyen MTT, Nguyen NT. A new dimeric alkylresorcinol from the stem barks of Swintonia floribunda (Anacardiaceae). Nat Prod Res 2018; 33:2883-2889. [PMID: 30295064 DOI: 10.1080/14786419.2018.1509329] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
From an EtOAc-soluble fraction of the stem barks of Swintonia floribunda (Anacardiaceae), one new dimeric alkylresorcinol named integracin E (1), together with 4 known compounds (2-5) were isolated. Their chemical structures were elucidated based on the spectroscopic data interpretation. The absolute configuration of 1 was determined by the specific rotation analysis of its acid-catalyzed hydrolysis product. Compound 1 showed potent tyrosinase inhibitory activity with an IC50 value of 48.2 μM.
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Affiliation(s)
- Phu H Dang
- a Faculty of Chemistry, VNUHCM-University of Science , Ho Chi Minh City , Vietnam
| | - Linh T T Nguyen
- a Faculty of Chemistry, VNUHCM-University of Science , Ho Chi Minh City , Vietnam
| | - Hue T T Nguyen
- a Faculty of Chemistry, VNUHCM-University of Science , Ho Chi Minh City , Vietnam
| | - Tho H Le
- a Faculty of Chemistry, VNUHCM-University of Science , Ho Chi Minh City , Vietnam
| | - Truong N V Do
- a Faculty of Chemistry, VNUHCM-University of Science , Ho Chi Minh City , Vietnam
| | - Hai X Nguyen
- a Faculty of Chemistry, VNUHCM-University of Science , Ho Chi Minh City , Vietnam
| | - Nghia D Le
- a Faculty of Chemistry, VNUHCM-University of Science , Ho Chi Minh City , Vietnam
| | - Mai T T Nguyen
- a Faculty of Chemistry, VNUHCM-University of Science , Ho Chi Minh City , Vietnam.,b Cancer Research Laboratory, Vietnam National University , Ho Chi Minh City , Vietnam
| | - Nhan T Nguyen
- a Faculty of Chemistry, VNUHCM-University of Science , Ho Chi Minh City , Vietnam.,b Cancer Research Laboratory, Vietnam National University , Ho Chi Minh City , Vietnam
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10
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Tran TD, Nguyen MTT, Le HV, Nguyen DN, Truong QD, Tran PD. Gold nanoparticles as an outstanding catalyst for the hydrogen evolution reaction. Chem Commun (Camb) 2018. [DOI: 10.1039/c8cc00038g] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
An electrode made of Au nanoparticles, ca. 13 nm in diameter, displays outstanding catalytic activity for the hydrogen evolution reaction in water.
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Affiliation(s)
- Tien D. Tran
- Department of Advanced Materials Science and Nanotechnology
- University of Science and Technology of Hanoi
- Vietnam Academy of Science and Technology
- Ha Noi
- Vietnam
| | - Mai T. T. Nguyen
- School of Chemical Engineering
- Hanoi University of Science and Technology
- Ha Noi
- Vietnam
| | - Hoang V. Le
- Department of Advanced Materials Science and Nanotechnology
- University of Science and Technology of Hanoi
- Vietnam Academy of Science and Technology
- Ha Noi
- Vietnam
| | - Duc N. Nguyen
- Department of Advanced Materials Science and Nanotechnology
- University of Science and Technology of Hanoi
- Vietnam Academy of Science and Technology
- Ha Noi
- Vietnam
| | - Quang Duc Truong
- Institute of Multidisciplinary Research for Advanced Materials
- Tohoku University
- Sendai 980-8577
- Japan
| | - Phong D. Tran
- Department of Advanced Materials Science and Nanotechnology
- University of Science and Technology of Hanoi
- Vietnam Academy of Science and Technology
- Ha Noi
- Vietnam
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Nguyen MTT, Le TH, Nguyen HX, Dang PH, Do TNV, Abe M, Takagi R, Nguyen NT. Artocarmins G-M, Prenylated 4-Chromenones from the Stems of Artocarpus rigida and Their Tyrosinase Inhibitory Activities. J Nat Prod 2017; 80:3172-3178. [PMID: 29227656 DOI: 10.1021/acs.jnatprod.7b00453] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Phytochemical analysis of an EtOAc extract of the stems of Artocarpus rigida led to the identification of seven new prenylated 4-chromenones, artocarmins G-M (1-7), and nine known compounds (8-17). Their structures were identified based on physical data analysis. In the tyrosinase inhibitory activity test, norartocarpetin (8) displayed the strongest effect, with an IC50 value of 0.023 μM.
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Affiliation(s)
| | | | | | | | | | - Manabu Abe
- Department of Chemistry, Graduate School of Science, Hiroshima University , Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Ryukichi Takagi
- Department of Chemistry, Graduate School of Science, Hiroshima University , Higashi-Hiroshima, Hiroshima 739-8526, Japan
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12
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Affiliation(s)
- Phu H. Dang
- Faculty of Chemistry, VNUHCM–University of Science, Ho Chi Minh City, Vietnam
| | - Tinh T. Nguyen
- Faculty of Chemistry, VNUHCM–University of Science, Ho Chi Minh City, Vietnam
| | - Tho H. Le
- Faculty of Chemistry, VNUHCM–University of Science, Ho Chi Minh City, Vietnam
| | - Hai X. Nguyen
- Faculty of Chemistry, VNUHCM–University of Science, Ho Chi Minh City, Vietnam
| | - Mai T. T. Nguyen
- Faculty of Chemistry, VNUHCM–University of Science, Ho Chi Minh City, Vietnam
- Cancer Research Laboratory, Vietnam National University, Ho Chi Minh City, Vietnam
| | - Nhan T. Nguyen
- Faculty of Chemistry, VNUHCM–University of Science, Ho Chi Minh City, Vietnam
- Cancer Research Laboratory, Vietnam National University, Ho Chi Minh City, Vietnam
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13
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Nguyen MTT, Lindegaard H, Hendricks O, Jørgensen CS, Kantsø B, Friis-Møller N. Initial Serological Response after Prime-boost Pneumococcal Vaccination in Rheumatoid Arthritis Patients: Results of a Randomized Controlled Trial. J Rheumatol 2017; 44:1794-1803. [PMID: 28966211 DOI: 10.3899/jrheum.161407] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/10/2017] [Indexed: 01/04/2023]
Abstract
OBJECTIVE To evaluate the initial serological responses to pneumococcal vaccination with the 13-valent protein-conjugated pneumococcal vaccine (PCV13) followed by the 23-valent polysaccharide pneumococcal vaccine (PPV23) among patients with rheumatoid arthritis (RA) treated with biological disease-modifying antirheumatic drugs (bDMARD) according to dosing and intervals between immunizations. METHODS Investigator-initiated clinical trial. Patients with RA receiving bDMARD were randomized (1:1:1) to immunization with single dose PCV13 followed by PPV23 after 16 or 24 weeks, or double dose PCV13 followed by PPV23 after 16 weeks. A comparison group of patients with RA treated with conventional synthetic (cs)DMARD received single dose PCV13 followed by PPV23 16 weeks later. Pneumococcal antibodies were collected before and 4 weeks after each vaccination. The primary endpoint was the proportion of participants responding to ≥ 6/12 pneumococcal serotypes 4 weeks after both vaccinations. RESULTS Sixty-five participants receiving bDMARD and 35 participants receiving csDMARD were included. After PPV23 vaccination, 87% (95% CI 0.76-0.94) and 94% (95% CI 0.77-0.99), respectively, of participants treated with bDMARD and csDMARD had reached the primary endpoint. There was no significant difference in primary endpoint between the 3 randomization arms. The response for rituximab-treated participants was 25% compared to ≥ 89% in participants treated with bDMARD with other mode of action. CONCLUSION The early serological response to prime-boost vaccination with PCV13 followed by PPV23 was very similar among participants receiving bDMARD and csDMARD. However, notable differences in response were observed according to individual bDMARD. It is important to consider the RA treatment when planning pneumococcal vaccination in patients with RA.
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Affiliation(s)
- Mai T T Nguyen
- From the Department of Infectious Diseases, and Department of Rheumatology, and Odense Patient data Explorative Network (OPEN), Odense University Hospital; Institute of Clinical Research, University of Southern Denmark; Institute of Regional Research, University of Southern Denmark, Odense; Department of Rheumatology, King Christian Xth Hospital for Rheumatic Disease, Graasten; Department of Microbiology and Virology, Statens Serum Institut, Copenhagen; Unit of Infectious Diseases, Department of Internal Medicine, Zealand University Hospital, Roskilde, Denmark. .,M.T. Nguyen, MD, Department of Infectious Diseases, Odense University Hospital, and Institute of Clinical Research, University of Southern Denmark, and OPEN, Odense University Hospital; H. Lindegaard, MD, PhD, Institute of Clinical Research, University of Southern Denmark, and Department of Rheumatology, Odense University Hospital; O. Hendricks, MD, PhD, Department of Rheumatology, King Christian Xth Hospital for Rheumatic Disease, and Institute of Regional Research, University of Southern Denmark; C.S. Jørgensen, MSc, PhD, Department of Microbiology and Virology, Statens Serum Institut; B. Kantsø, MSc, PhD, Department of Microbiology and Virology, Statens Serum Institut; N. Friis-Møller, MD, DMSc, Department of Infectious Diseases, Odense University Hospital, and Institute of Clinical Research, University of Southern Denmark, and Unit of Infectious Diseases, Department of Internal Medicine, Zealand University Hospital.
| | - Hanne Lindegaard
- From the Department of Infectious Diseases, and Department of Rheumatology, and Odense Patient data Explorative Network (OPEN), Odense University Hospital; Institute of Clinical Research, University of Southern Denmark; Institute of Regional Research, University of Southern Denmark, Odense; Department of Rheumatology, King Christian Xth Hospital for Rheumatic Disease, Graasten; Department of Microbiology and Virology, Statens Serum Institut, Copenhagen; Unit of Infectious Diseases, Department of Internal Medicine, Zealand University Hospital, Roskilde, Denmark.,M.T. Nguyen, MD, Department of Infectious Diseases, Odense University Hospital, and Institute of Clinical Research, University of Southern Denmark, and OPEN, Odense University Hospital; H. Lindegaard, MD, PhD, Institute of Clinical Research, University of Southern Denmark, and Department of Rheumatology, Odense University Hospital; O. Hendricks, MD, PhD, Department of Rheumatology, King Christian Xth Hospital for Rheumatic Disease, and Institute of Regional Research, University of Southern Denmark; C.S. Jørgensen, MSc, PhD, Department of Microbiology and Virology, Statens Serum Institut; B. Kantsø, MSc, PhD, Department of Microbiology and Virology, Statens Serum Institut; N. Friis-Møller, MD, DMSc, Department of Infectious Diseases, Odense University Hospital, and Institute of Clinical Research, University of Southern Denmark, and Unit of Infectious Diseases, Department of Internal Medicine, Zealand University Hospital
| | - Oliver Hendricks
- From the Department of Infectious Diseases, and Department of Rheumatology, and Odense Patient data Explorative Network (OPEN), Odense University Hospital; Institute of Clinical Research, University of Southern Denmark; Institute of Regional Research, University of Southern Denmark, Odense; Department of Rheumatology, King Christian Xth Hospital for Rheumatic Disease, Graasten; Department of Microbiology and Virology, Statens Serum Institut, Copenhagen; Unit of Infectious Diseases, Department of Internal Medicine, Zealand University Hospital, Roskilde, Denmark.,M.T. Nguyen, MD, Department of Infectious Diseases, Odense University Hospital, and Institute of Clinical Research, University of Southern Denmark, and OPEN, Odense University Hospital; H. Lindegaard, MD, PhD, Institute of Clinical Research, University of Southern Denmark, and Department of Rheumatology, Odense University Hospital; O. Hendricks, MD, PhD, Department of Rheumatology, King Christian Xth Hospital for Rheumatic Disease, and Institute of Regional Research, University of Southern Denmark; C.S. Jørgensen, MSc, PhD, Department of Microbiology and Virology, Statens Serum Institut; B. Kantsø, MSc, PhD, Department of Microbiology and Virology, Statens Serum Institut; N. Friis-Møller, MD, DMSc, Department of Infectious Diseases, Odense University Hospital, and Institute of Clinical Research, University of Southern Denmark, and Unit of Infectious Diseases, Department of Internal Medicine, Zealand University Hospital
| | - Charlotte Sværke Jørgensen
- From the Department of Infectious Diseases, and Department of Rheumatology, and Odense Patient data Explorative Network (OPEN), Odense University Hospital; Institute of Clinical Research, University of Southern Denmark; Institute of Regional Research, University of Southern Denmark, Odense; Department of Rheumatology, King Christian Xth Hospital for Rheumatic Disease, Graasten; Department of Microbiology and Virology, Statens Serum Institut, Copenhagen; Unit of Infectious Diseases, Department of Internal Medicine, Zealand University Hospital, Roskilde, Denmark.,M.T. Nguyen, MD, Department of Infectious Diseases, Odense University Hospital, and Institute of Clinical Research, University of Southern Denmark, and OPEN, Odense University Hospital; H. Lindegaard, MD, PhD, Institute of Clinical Research, University of Southern Denmark, and Department of Rheumatology, Odense University Hospital; O. Hendricks, MD, PhD, Department of Rheumatology, King Christian Xth Hospital for Rheumatic Disease, and Institute of Regional Research, University of Southern Denmark; C.S. Jørgensen, MSc, PhD, Department of Microbiology and Virology, Statens Serum Institut; B. Kantsø, MSc, PhD, Department of Microbiology and Virology, Statens Serum Institut; N. Friis-Møller, MD, DMSc, Department of Infectious Diseases, Odense University Hospital, and Institute of Clinical Research, University of Southern Denmark, and Unit of Infectious Diseases, Department of Internal Medicine, Zealand University Hospital
| | - Bjørn Kantsø
- From the Department of Infectious Diseases, and Department of Rheumatology, and Odense Patient data Explorative Network (OPEN), Odense University Hospital; Institute of Clinical Research, University of Southern Denmark; Institute of Regional Research, University of Southern Denmark, Odense; Department of Rheumatology, King Christian Xth Hospital for Rheumatic Disease, Graasten; Department of Microbiology and Virology, Statens Serum Institut, Copenhagen; Unit of Infectious Diseases, Department of Internal Medicine, Zealand University Hospital, Roskilde, Denmark.,M.T. Nguyen, MD, Department of Infectious Diseases, Odense University Hospital, and Institute of Clinical Research, University of Southern Denmark, and OPEN, Odense University Hospital; H. Lindegaard, MD, PhD, Institute of Clinical Research, University of Southern Denmark, and Department of Rheumatology, Odense University Hospital; O. Hendricks, MD, PhD, Department of Rheumatology, King Christian Xth Hospital for Rheumatic Disease, and Institute of Regional Research, University of Southern Denmark; C.S. Jørgensen, MSc, PhD, Department of Microbiology and Virology, Statens Serum Institut; B. Kantsø, MSc, PhD, Department of Microbiology and Virology, Statens Serum Institut; N. Friis-Møller, MD, DMSc, Department of Infectious Diseases, Odense University Hospital, and Institute of Clinical Research, University of Southern Denmark, and Unit of Infectious Diseases, Department of Internal Medicine, Zealand University Hospital
| | - Nina Friis-Møller
- From the Department of Infectious Diseases, and Department of Rheumatology, and Odense Patient data Explorative Network (OPEN), Odense University Hospital; Institute of Clinical Research, University of Southern Denmark; Institute of Regional Research, University of Southern Denmark, Odense; Department of Rheumatology, King Christian Xth Hospital for Rheumatic Disease, Graasten; Department of Microbiology and Virology, Statens Serum Institut, Copenhagen; Unit of Infectious Diseases, Department of Internal Medicine, Zealand University Hospital, Roskilde, Denmark.,M.T. Nguyen, MD, Department of Infectious Diseases, Odense University Hospital, and Institute of Clinical Research, University of Southern Denmark, and OPEN, Odense University Hospital; H. Lindegaard, MD, PhD, Institute of Clinical Research, University of Southern Denmark, and Department of Rheumatology, Odense University Hospital; O. Hendricks, MD, PhD, Department of Rheumatology, King Christian Xth Hospital for Rheumatic Disease, and Institute of Regional Research, University of Southern Denmark; C.S. Jørgensen, MSc, PhD, Department of Microbiology and Virology, Statens Serum Institut; B. Kantsø, MSc, PhD, Department of Microbiology and Virology, Statens Serum Institut; N. Friis-Møller, MD, DMSc, Department of Infectious Diseases, Odense University Hospital, and Institute of Clinical Research, University of Southern Denmark, and Unit of Infectious Diseases, Department of Internal Medicine, Zealand University Hospital
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Nguyen HX, Nguyen MTT, Nguyen NT, Awale S. Chemical Constituents of Propolis from Vietnamese Trigona minor and Their Antiausterity Activity against the PANC-1 Human Pancreatic Cancer Cell Line. J Nat Prod 2017; 80:2345-2352. [PMID: 28783356 DOI: 10.1021/acs.jnatprod.7b00375] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The ethanol extract of propolis from the Vietnamese stingless bee Trigona minor possessed potent preferential cytotoxicity against PANC-1 human pancreatic cancer cells in nutrient-deprived medium, with a PC50 value of 14.0 μg/mL. Chemical investigation of this extract led to the isolation of 15 cycloartane-type triterpenoids, including five new compounds (1-5), and a lanostane-type triterpenoid. The structures of the new compounds were elucidated on the basis of NMR spectroscopic analysis. Among the isolated compounds, 23-hydroxyisomangiferolic acid B (5) and 27-hydroxyisomangiferolic acid (13) exhibited the most potent preferential cytotoxicity against PANC-1 human pancreatic cancer cells under nutrition-deprived conditions, with PC50 values of 4.3 and 3.7 μM, respectively.
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Affiliation(s)
| | | | | | - Suresh Awale
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama , 2630 Sugitani, Toyama 930-0194, Japan
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15
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Nguyen NT, Dang PH, Vu NXT, Le TH, Nguyen MTT. Quinoliniumolate and 2H-1,2,3-Triazole Derivatives from the Stems of Paramignya trimera and Their α-Glucosidase Inhibitory Activities: In Vitro and in Silico Studies. J Nat Prod 2017; 80:2151-2155. [PMID: 28726400 DOI: 10.1021/acs.jnatprod.7b00289] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
From a CHCl3-soluble extract of the stems of Paramignya trimera, two new alkaloids, (E)-2-(prop-1-enyl)-N-methylquinolinium-4-olate (1) and (R)-2-ethylhexyl 2H-1,2,3-triazole-4-carboxylate (2), were isolated. Their structures were elucidated based on the spectroscopic data interpretation. Compound 2 possesses α-glucosidase inhibitory activity, with an IC50 value of 137.9 μM. Molecular docking studies of 1 and 2 with human maltase-glucoamylase (MGAM) were performed for the first time; thus, the 2,3-diH+-1H-1,2,3-triazolium cation (2i) showed good interactions with both MGAM-N (2QMJ) and -C (3TOP) terminal subunits.
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Affiliation(s)
- Nhan T Nguyen
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
- Cancer Research Laboratory, Vietnam National University, Ho Chi Minh City , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Phu H Dang
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Ngoc X T Vu
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Tho H Le
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Mai T T Nguyen
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
- Cancer Research Laboratory, Vietnam National University, Ho Chi Minh City , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
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Dang PH, Nguyen HX, Nguyen HHT, Vo TD, Le TH, Phan THN, Nguyen MTT, Nguyen NT. Lignans from the Roots of Taxus wallichiana and Their α-Glucosidase Inhibitory Activities. J Nat Prod 2017; 80:1876-1882. [PMID: 28581744 DOI: 10.1021/acs.jnatprod.7b00171] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
From an EtOAc-soluble extract of the roots of Taxus wallichiana, six new (1-6) and 11 known lignans were isolated. The structures of the new compounds were elucidated based on interpretation of spectroscopic data. (+)-7'-epi-Tsugacetal (1) is a rare aryltetralin-type lignan having a cis-orientation of H-7' and H-8'. Compounds 3-6 were identified as the first naturally occurring tetrahydrofuranoid lignans having a cis-orientation of H-7 and H-8. All tested compounds were found to possess α-glucosidase inhibitory activity, with formosanol (9) showing the most potent effect with an IC50 value of 35.3 μM.
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Affiliation(s)
- Phu H Dang
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Hai X Nguyen
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Hanh H T Nguyen
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Thai D Vo
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Tho H Le
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Trong H N Phan
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Mai T T Nguyen
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
- Cancer Research Laboratory, Vietnam National University, Ho Chi Minh City , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Nhan T Nguyen
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
- Cancer Research Laboratory, Vietnam National University, Ho Chi Minh City , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
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Ho-Pham LT, Lai TQ, Nguyen MTT, Nguyen TV. Relationship between Body Mass Index and Percent Body Fat in Vietnamese: Implications for the Diagnosis of Obesity. PLoS One 2015; 10:e0127198. [PMID: 26018910 PMCID: PMC4446298 DOI: 10.1371/journal.pone.0127198] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 04/13/2015] [Indexed: 12/25/2022] Open
Abstract
Background The burden of obesity in Vietnam has not been well defined because there is a lack of reference data for percent body fat (PBF) in Asians. This study sought to define the relationship between PBF and body mass index (BMI) in the Vietnamese population. Methods The study was designed as a comparative cross-sectional investigation that involved 1217 individuals of Vietnamese background (862 women) aged 20 years and older (average age 47 yr) who were randomly selected from the general population in Ho Chi Minh City. Lean mass (LM) and fat mass (FM) were measured by DXA (Hologic QDR 4500). PBF was derived as FM over body weight. Results Based on BMI ≥30, the prevalence of obesity was 1.1% and 1.3% for men and women, respectively. The prevalence of overweight and obesity combined (BMI ≥25) was ~24% and ~19% in men and women, respectively. Based on the quadratic relationship between BMI and PBF, the approximate PBF corresponding to the BMI threshold of 30 (obese) was 30.5 in men and 41 in women. Using the criteria of PBF >30 in men and PBF >40 in women, approximately 15% of men and women were considered obese. Conclusion These data suggest that body mass index underestimates the prevalence of obesity. We suggest that a PBF >30 in men or PBF >40 in women is used as criteria for the diagnosis of obesity in Vietnamese adults. Using these criteria, 15% of Vietnamese adults in Ho Chi Minh City was considered obese.
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Affiliation(s)
- Lan T. Ho-Pham
- Bone and Muscle Research Division, Faculty of Applied Sciences, Ton DucThang University, Ho Chi Minh City, Vietnam
- Department of Internal Medicine, Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Vietnam
- Department of Rheumatology, People’s Hospital 115, Ho Chi Minh City, Vietnam
- * E-mail:
| | - Thai Q. Lai
- Department of Rheumatology, People’s Hospital 115, Ho Chi Minh City, Vietnam
| | - Mai T. T. Nguyen
- Department of Medical Ethic—Behavioral Science, Pham Ngoc Thach University of Medicine, Ho Chi Minh City, Vietnam
| | - Tuan V. Nguyen
- Bone and Muscle Research Division, Faculty of Applied Sciences, Ton DucThang University, Ho Chi Minh City, Vietnam
- Osteoporosis and Bone Biology, Garvan Institute of Medical Research, Sydney, Australia
- School of Public Health and Community Medicine, UNSW Australia, Sydney, Australia
- Centre for Health Technologies, University of Technology, Sydney, Australia
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18
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Nguyen MTT, Pødenphant J, Ravn P. Three cases of severely disseminated Staphylococcus aureus infection in patients treated with tocilizumab. BMJ Case Rep 2013; 2013:bcr-2012-007413. [PMID: 23283607 DOI: 10.1136/bcr-2012-007413] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
We report three cases of severe disseminated Staphylococcus aureus infection in patients with rheumatoid arthritis (RA) treated with tocilizumab. Tocilizumab is a new drug, unknown to most internists, and injections given weeks before admission may not be considered by the patient as part of their 'current medical treatment', and the physician may not be aware that the patient is severely immunosuppressed. Severe infections in RA patients treated with tocilizumab may present with mild symptoms despite severe and disseminated infection and, as these patients are severely immunodeficient-intensive diagnostic work-up and early treatment should be performed. Systematic postmarketing studies are needed to clarify if there is a true increased risk of disseminated S aureus infections. We suggest caution when prescribing tocilizumab to patients with prosthetic joints and/or prior invasive S aureus infections and that patients are taught to inform health staff about their medication history and their increased risk of infection.
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Affiliation(s)
- Mai T T Nguyen
- Department of Infectious Diseases, University Hospital, Odense, Denmark
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van Reeuwijk J, Boldt K, Mans DA, Texier Y, van Beersum SE, Letteboer SJ, Nguyen MTT, Ueffing M, Roepman R. Scrutinizing ciliopathies by unravelling the ciliary interactome. Cilia 2012. [PMCID: PMC3555906 DOI: 10.1186/2046-2530-1-s1-p58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Niemi ME, Falkenberg T, Nguyen MTT, Nguyen MTN, Patel V, Faxelid E. The social contexts of depression during motherhood: a study of Explanatory Models in Vietnam. J Affect Disord 2010; 124:29-37. [PMID: 19854515 DOI: 10.1016/j.jad.2009.09.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2009] [Revised: 09/28/2009] [Accepted: 09/28/2009] [Indexed: 11/19/2022]
Abstract
BACKGROUND Major depression is increasing world-wide, and is the fourth leading cause of the global disease burden. Depression is rarely diagnosed in primary care settings in Vietnam, and those afflicted usually only seek professional care when the illness has become very severe. Depressive disorders affecting mothers are an important cause of low birth-weight, childhood stunting, under nutrition and adverse mental development, and a study has shown a 33% prevalence of postnatal depression symptoms in Ho Chi Minh City. METHODS The aim of this study was to elicit Illness Explanatory Models (EMs) of depression and postnatal depression from nine mothers and nine health workers. The study was conducted in a semi-rural area in Vietnam, and the EMs were elicited through semi-structured interviews where a case vignette of depression was used as the basis of questioning. RESULTS The EMs elicited were predominantly somatosocial in nature and the mothers assigned a strong personal responsibility for care. Psychiatric treatment and care was seldom recommended. Lack of communication was described as an important factor concealing depression, and together with the lack of care-seeking can be expected to impede effective treatment. LIMITATIONS The results of this study cannot be generalised beyond the group studied, or the context of Ba Vi, though we believe that analytical generalisation to other contexts can be made. CONCLUSION (CLINICAL RELEVANCE): The results of this study highlight the importance of depression and postnatal depression being diagnosed in primary care, and of a cross-sectoral approach for the prevention of depression in Vietnam, which takes into account the social causation of depression in women.
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Affiliation(s)
- Maria E Niemi
- Karolinska Institutet, Department of Neurobiology, Care Sciences and Society, Division of Nursing, Unit for Studies of Integrative Care, Alfred Nobels Allee 23, Huddinge, Sweden.
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