1
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Quang De T, Nguyen CQ, Le Dang Q, Nguyen Thi NY, Trong Tuan N, Hoon Suh D, Chu J, Bepary S, Lee GH, Kang NS, Cho H, Park WK, Lim HJ. Rational design of novel diaryl ether-linked benzimidazole derivatives as potent and selective BACE1 inhibitors. Biochem Biophys Res Commun 2024; 698:149538. [PMID: 38271836 DOI: 10.1016/j.bbrc.2024.149538] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 01/14/2024] [Indexed: 01/27/2024]
Abstract
Due to the large size and high flexibility of the catalytic active site of BACE1 enzyme, the development of nonpeptide inhibitors with optimal pharmacological properties is still highly demanding. In this work, we have discovered 2-aminobenzimidazole-containg ether scaffolds having potent and selective inhibitory potentials against BACE1 enzyme. We have synthesized novel 29 compounds and optimization of aryl linker region resulted in highly potent BACE1 inhibitory activities with EC50 values of 0.05-2.71 μM. The aryloxy-phenyl analogs 20j showed the EC50 value as low as 0.07 μM in the enzyme assay, whereas, the benzyloxyphenyl dervative 24b was comparatively less effective in the enzyme assay. But interestingly the latter was more effective in the cell assay (EC50 value 1.2 μM). While comparing synthesized derivatives in the cell assay using PC12-APPSW cell, compound 27f appeared as the most potent BACE1 inhibitor having EC50 value 0.7 μM. This scaffold also showed high selectivity over BACE2 enzyme and cathepsin D. Furthermore, the research findings were bolstered through the incorporation of molecular docking, molecular dynamics, and DFT studies. We firmly believe that these discoveries will pave the way for the development of a novel class of small-molecule selective BACE1 inhibitors.
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Affiliation(s)
- Tran Quang De
- Department of Medicinal and Pharmaceutical Chemistry, University of Science and Technology, 217 Gajeong-ro Yuseong-gu, Daejeon, 305-333, South Korea
| | - Cuong Quoc Nguyen
- Department of Chemistry, College of Natural Sciences, Can Tho University, Can Tho, 94000, Viet Nam; Analytical Techniques Lab (1.16-ATL), CTU High-tech Building, Can Tho University, Can Tho, 94000, Viet Nam.
| | - Quang Le Dang
- Institute for Tropical Technology, Vietnam Academy of Science and Technology, Hanoi, 10072, Viet Nam; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, 10072, Viet Nam
| | | | - Nguyen Trong Tuan
- Department of Chemistry, College of Natural Sciences, Can Tho University, Can Tho, 94000, Viet Nam
| | - Dong Hoon Suh
- Division of Drug Discovery Research, Korea Research Institute of Chemical Technology, P.O.Box 107, Yuseong-Gu, Daejeon, 305-600, South Korea
| | - Jeonghyun Chu
- Division of Drug Discovery Research, Korea Research Institute of Chemical Technology, P.O.Box 107, Yuseong-Gu, Daejeon, 305-600, South Korea
| | - Sukumar Bepary
- Division of Drug Discovery Research, Korea Research Institute of Chemical Technology, P.O.Box 107, Yuseong-Gu, Daejeon, 305-600, South Korea
| | - Ge Hyeong Lee
- Division of Drug Discovery Research, Korea Research Institute of Chemical Technology, P.O.Box 107, Yuseong-Gu, Daejeon, 305-600, South Korea
| | - Nam Sook Kang
- Division of Drug Discovery Research, Korea Research Institute of Chemical Technology, P.O.Box 107, Yuseong-Gu, Daejeon, 305-600, South Korea
| | - Heeyeong Cho
- Division of Drug Discovery Research, Korea Research Institute of Chemical Technology, P.O.Box 107, Yuseong-Gu, Daejeon, 305-600, South Korea
| | - Woo Kyu Park
- Division of Drug Discovery Research, Korea Research Institute of Chemical Technology, P.O.Box 107, Yuseong-Gu, Daejeon, 305-600, South Korea
| | - Hee-Jong Lim
- Division of Drug Discovery Research, Korea Research Institute of Chemical Technology, P.O.Box 107, Yuseong-Gu, Daejeon, 305-600, South Korea.
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2
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Xuan NTT, Le DV, Thanh MT, Son LD, Doanh NV, Thu DM, Tuan NT, Duy TK, Thang TD, Nien LV. A comparison between the enzymatic oxidation method and headspace gas chromatography with a flame ionization detector in the determination of postmortem blood ethanol. Forensic Sci Med Pathol 2024:10.1007/s12024-024-00791-x. [PMID: 38376759 DOI: 10.1007/s12024-024-00791-x] [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] [Accepted: 01/30/2024] [Indexed: 02/21/2024]
Abstract
Ethanol is the most commonly encountered substance in forensic toxicology. Determining blood alcohol concentration (BAC) in autopsies accounts for the majority of work in forensic diagnosis. The most common method to assess BAC is the enzymatic oxidation method because of its low cost, easy operation, and high throughput. Still, the elevated lactate and lactate dehydrogenase (LDH) levels in postmortem blood may affect accuracy. This study uses headspace gas chromatography with a flame ionization detector (HS-GC/FID) to assess the interference of lactate and LDH levels on BAC in 110 autopsied blood samples determined by the enzymatic oxidation method. The results showed that lactate and LDH levels in postmortem blood were higher than in normal blood. There was a weak correlation between the lactate levels and BAC difference (r = 0.23, p < 0.05) and a strong correlation between LDH levels and BAC difference (r = 0.67, p < 0.001). The differentiation of BAC between the enzymatic oxidation method and HS-GC/FID was significant (p < 0.001), confirming the interference significantly. All postmortem blood samples with lactate and LDH levels higher than regular lead to a positive error in determining BAC by enzymatic oxidation method. The study results suggest that the HS-GC/FID method should be used to determine BAC in postmortem blood samples instead of the enzymatic oxidation method to avoid mistakes in forensic diagnosis.
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Affiliation(s)
| | - Dinh Vu Le
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City, 700000, Vietnam.
| | - Mai Thi Thanh
- Forensic Medicine Center of Ho Chi Minh City, Ho Chi Minh City, 700000, Vietnam
| | - Le Dinh Son
- Forensic Medicine Center of Ho Chi Minh City, Ho Chi Minh City, 700000, Vietnam
| | - Nguyen Viet Doanh
- Forensic Medicine Center of Ho Chi Minh City, Ho Chi Minh City, 700000, Vietnam
| | - Dang Minh Thu
- Forensic Medicine Center of Ho Chi Minh City, Ho Chi Minh City, 700000, Vietnam
| | - Nguyen Trong Tuan
- Forensic Medicine Center of Ho Chi Minh City, Ho Chi Minh City, 700000, Vietnam
| | - Trang Khanh Duy
- Forensic Medicine Center of Ho Chi Minh City, Ho Chi Minh City, 700000, Vietnam
| | - Tran Dinh Thang
- Institute of Biotechnology and Food Technology, Industrial University of Ho Chi Minh City, Ho Chi Minh, 700000, Vietnam
| | - Lam Vinh Nien
- University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, 700000, Vietnam
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3
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De Tran Q, Nguyen CQ, Dang QL, Minh Nguyen TH, Buu Hue BT, Thi Le MU, Tuan NT, Chau Thanh NQ, Men TT, Quan PM, Tuan ND, Cam TT, Thu Thuy NT, Bich Hau VT, Binh TD, Nguyen HP. ZIKV Inhibitors Based on Pyrazolo[3,4- d]pyridazine-7-one Core: Rational Design, In Vitro Evaluation, and Theoretical Studies. ACS Omega 2023; 8:48994-49008. [PMID: 38162759 PMCID: PMC10753549 DOI: 10.1021/acsomega.3c06612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 11/21/2023] [Accepted: 11/27/2023] [Indexed: 01/03/2024]
Abstract
The Zika virus (ZIKV) is believed to cause birth defects, and no anti-ZIKV drugs have been approved by medical organizations to date. Starting from antimicrobial lead compounds with a pyrazolo[3,4-d]pyridazine-7-one scaffold, we synthesized 16 derivatives and screened their ability to interfere with ZIKV infection utilizing a cell-based phenotypic assay. Of these, five compounds showed significant inhibition of ZIKV with a selective index value greater than 4.6. In particular, compound 9b showed the best anti-ZIKV activity with a selectivity index of 22.4 (half-maximal effective concentration = 25.6 μM and 50% cytotoxic concentration = 572.4 μM). Through the brine shrimp lethality bioassay, 9b, 10b, 12, 17a, and 19a showed median lethal dose values in a range of 87.2-100.3 μg/mL. Compound 9b was also targeted to the NS2B-NS3 protease of ZIKV using molecular docking protocols, in which it acted as a noncompetitive inhibitor and strongly bound to five key amino acids (His51, Asp75, Ser135, Ala132, Tyr161). Utilizing the pharmacophore model of 9b, the top 20 hits were identified as prospective inhibitors of NS2B-NS3 protease, and six of them were confirmed for their stability with the protease via redocking and molecular dynamics simulations.
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Affiliation(s)
- Quang De Tran
- Department
of Chemistry, College of Natural Sciences, Can Tho University, Can Tho 94000, Vietnam
- Analytical
Techniques Lab (1.16-AT Department of Chemistry L), CTU High-tech
Building, Can Tho University, Can Tho 94000, Vietnam
| | - Cuong Quoc Nguyen
- Department
of Chemistry, College of Natural Sciences, Can Tho University, Can Tho 94000, Vietnam
- Analytical
Techniques Lab (1.16-AT Department of Chemistry L), CTU High-tech
Building, Can Tho University, Can Tho 94000, Vietnam
| | - Quang Le Dang
- Institute
for Tropical Technology, Vietnam Academy
of Science and Technology, Hanoi 10072, Vietnam
- Graduate
University of Science and Technology, Vietnam
Academy of Science and Technology, Hanoi 10072, Vietnam
| | - Thi Hong Minh Nguyen
- Department
of Life Science, University of Science and
Technology of Ha Noi, Vietnam Academy of Science and Technology, Ha Noi 10072, Vietnam
| | - Bui Thi Buu Hue
- Department
of Chemistry, College of Natural Sciences, Can Tho University, Can Tho 94000, Vietnam
| | - Minh Uyen Thi Le
- Department
of Surgery, Division of Transplant Surgery, Indiana University School of Medicine, Indianapolis 46202, Indiana, United States
| | - Nguyen Trong Tuan
- Department
of Chemistry, College of Natural Sciences, Can Tho University, Can Tho 94000, Vietnam
| | - Nguyen Quoc Chau Thanh
- Department
of Chemistry, College of Natural Sciences, Can Tho University, Can Tho 94000, Vietnam
| | - Tran Thanh Men
- Department
of Biology, College of Natural Sciences, Can Tho University, Can Tho 94000, Vietnam
| | - Pham Minh Quan
- Graduate
University of Science and Technology, Vietnam
Academy of Science and Technology, Hanoi 10072, Vietnam
- Institute
of Natural Products Chemistry, Vietnam Academy
of Science and Technology, Ha Noi 10072, Vietnam
| | | | | | - Nguyen Thi Thu Thuy
- National Institute of Hygiene and Epidemiology, No 1 Yersin, Hai Ba Trung, Ha Noi 10000, Vietnam
| | - Vu Thi Bich Hau
- National Institute of Hygiene and Epidemiology, No 1 Yersin, Hai Ba Trung, Ha Noi 10000, Vietnam
| | - Tran Duy Binh
- Department
of Biology, College of Natural Sciences, Can Tho University, Can Tho 94000, Vietnam
| | - Hong Phuong Nguyen
- Department
of Pediatrics, Indiana University School
of Medicine, Indianapolis 46202, Indiana, United States
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4
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Tran MT, Quang Trung D, Tri Tuan N, Tuan NT, Tu N, Van Du N, Duy Hung N, Van Quang N, Thi Hao Tam T, Trung Kien ND, Hieu NM, Huy PT. Highly efficient green-emitting ZnO:Cu 2+ phosphors for NUV-pumped white-emitting diodes. Dalton Trans 2023; 52:12704-12716. [PMID: 37609935 DOI: 10.1039/d3dt01663c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Phosphor-converted white light-emitting diodes (WLEDs) have received significant attention; however, the leaked light from their blue InGaN chips has an undesirable effect on human health. Hence, it is necessary to develop red, green, and blue-emitting phosphors, which can be excited by an NUV chip instead of a blue chip. Herein, green-emitting ZnO:Cu2+ phosphors have been successfully synthesized by a simple and facile thermal diffusion method. The obtained powder shows a broad emission band peaking at 525 nm and a strong absorption peak at 377 nm. The ZnO:5%Cu2+ phosphor annealed at 800 °C in 2 hours revealed a lifetime of 0.57 ms, an activation energy of 0.212 eV, and the highest emission intensity with (x, y) CIE colour coordinates (0.3130, 0.5253). A WLED prototype has been fabricated by coating the ZnO:5%Cu2+ phosphor on an NUV 375 nm LED chip, where this coated phosphor shows a high quantum efficiency (QE) of 56.6%. This is, so far, the highest reported QE value for ZnO-based phosphors. These results suggest that the ZnO:Cu2+ phosphor could be an excellent candidate for NUV-pumped phosphor-converted WLED applications.
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Affiliation(s)
- Manh Trung Tran
- Faculty of Materials Science and Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam.
| | - Do Quang Trung
- Faculty of Materials Science and Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam.
- Faculty of Fundamental Sciences, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
| | - Nguyen Tri Tuan
- College of Natural Science, Can Tho University, Ninh-Kieu District, Can Tho 94000, Vietnam
| | - Nguyen Trong Tuan
- College of Natural Science, Can Tho University, Ninh-Kieu District, Can Tho 94000, Vietnam
| | - Nguyen Tu
- Faculty of Materials Science and Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam.
- Faculty of Fundamental Sciences, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
| | - Nguyen Van Du
- Faculty of Materials Science and Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam.
- Faculty of Fundamental Sciences, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
| | - Nguyen Duy Hung
- International Training Institute for Materials Science (ITIMS), Hanoi University of Science and Technology, 01 Dai Co Viet Street, Hanoi 10000, Vietnam
| | - Nguyen Van Quang
- Department of Chemistry, Hanoi Pedagogical University 2, Phuc Yen, Vinh Phuc, Vietnam
| | - Tong Thi Hao Tam
- School of Information Technology and Digital Economics, National Economic University, 207 Giai Phong Street, Hanoi 10000, Vietnam
| | - Nguyen Duc Trung Kien
- Faculty of Electrical and Electronic Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
| | - Nguyen Minh Hieu
- Faculty of Materials Science and Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam.
| | - Pham Thanh Huy
- Faculty of Materials Science and Engineering, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam.
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5
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Khang DT, Quy TN, Dam NP, Tuan NT, Men TT, Van Ay N, Thuy NP. Isolation and purification of potential weed inhibitors from Mimosa pigra L. Heliyon 2023; 9:e18205. [PMID: 37519759 PMCID: PMC10375793 DOI: 10.1016/j.heliyon.2023.e18205] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 07/08/2023] [Accepted: 07/11/2023] [Indexed: 08/01/2023] Open
Abstract
The diversity in structure and herbicidal properties detected in natural phytotoxic compounds could bring about advantages for development bio-herbicides. The present study was carried out search for potential weed inhibitors from the parts of Mimosa pigra L. The ethyl acetate (EtOAc) extract of leaf of M. pigra showed inhibitory activity during the time that Echinochloa crus-galli (barnyardgrass) germinates and grows, which is greater than that of other extracts. From this active extract, potent growth inhibitors were isolated and identified by column chromatography (CC), gas chromatography-mass spectrometry (GC-MS) and nuclear magnetic resonance (1H and 13C NMR). The six compounds were purified in this study namely: lupeol (C1, 13.2 mg), stigmastane-3,6-dione (C2, 14.7 mg), quercetin (C3, 20.2 mg), chrysoeriol (C4, 28 mg), methyl gallate (C5, 21.5 mg) and daucosterol (C6, 16.0 mg). The C2 (quercetin) compound completely inhibited the emergency, shoot height and root length of E. crus-galli at 1 mg/mL concentration (IC50 shoot height = 0.56 mg/mL). This was also the first study to report the isolation and allelopathic activity of lupeol, chrysoeriol and daucosterol from M. pigra leaf. Findings of this study highlighted that quercetin from M. pigra may become bio-herbicide to control barnyard grass and other grass weeds for the development of safe agriculture.
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Affiliation(s)
- Do Tan Khang
- Institute of Food and Biotechnology, Can Tho University, 94000, Can Tho City, Viet Nam
| | - Tran Ngoc Quy
- Institute of Food and Biotechnology, Can Tho University, 94000, Can Tho City, Viet Nam
| | - Nguyen Phuc Dam
- College of Education, Can Tho University, 94000, Can Tho City, Viet Nam
| | - Nguyen Trong Tuan
- College of Natural Sciences, Can Tho University, 94000, Can Tho City, Viet Nam
| | - Tran Thanh Men
- College of Natural Sciences, Can Tho University, 94000, Can Tho City, Viet Nam
| | - Nguyen Van Ay
- College of Agriculture, Can Tho University, 94000, Can Tho City, Viet Nam
| | - Nguyen Phuong Thuy
- School of Agriculture and Aquaculture, Tra Vinh University, Tra Vinh province, 87000, Viet Nam
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6
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Nguyen HP, Tran QD, Nguyen CQ, Hoa TP, Duy Binh T, Nhu Thao H, Hue BTB, Tuan NT, Le Dang Q, Quoc Chau Thanh N, Van Ky N, Pham MQ, Yang SG. Anti-multiple myeloma potential of resynthesized belinostat derivatives: an experimental study on cytotoxic activity, drug combination, and docking studies. RSC Adv 2022; 12:22108-22118. [PMID: 36043105 PMCID: PMC9364358 DOI: 10.1039/d2ra01969h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 07/18/2022] [Indexed: 11/21/2022] Open
Abstract
Multiple myeloma is a deadly cancer that is a complex and multifactorial disease. In the present study, 12 belinostat derivatives (four resynthesized and eight new), HDAC inhibitors, were resynthesized via either Knoevenagel condensation, or Wittig reaction, or Heck reaction. Then an evaluation of the antiproliferative activities against myeloma cells MOPC-315 was carried out. Amongst them, compound 7f was the most bioactive compound with an IC50 of 0.090 ± 0.016 μM, being 3.5-fold more potent than the reference belinostat (IC50 = 0.318 ± 0.049 μM). Furthermore, we also confirmed the inhibitory activity of 7f in a cellular model. Additionally, we found that the inhibitory activity of 7f against histone deacetylase 6 catalytic activity (HDAC6) is more potent than that of belinostat. Finally, we observed the strong synergistic interaction between the derivative 7f and the proteasome bortezomib inhibitor (CI = 0.26), while belinostat and bortezomib showed synergism with a CI value of 0.36. Taken together, the above results suggest that 7f is a promising HDAC inhibitor deserving further investigation.
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Affiliation(s)
- Hong Phuong Nguyen
- Department of Biomedical Science, BK21 FOUR Program in Biomedical Science and Engineering, Inha University College of Medicine Incheon 22212 South Korea +82-32-890-1199 +82-32-890-2832
| | - Quang De Tran
- Department of Chemistry, College of Natural Sciences, Can Tho University Can Tho 90000 Vietnam +84934527817
| | - Cuong Quoc Nguyen
- Department of Chemistry, College of Natural Sciences, Can Tho University Can Tho 90000 Vietnam +84934527817
| | - Tran Phuong Hoa
- Department of Biomedical Science, BK21 FOUR Program in Biomedical Science and Engineering, Inha University College of Medicine Incheon 22212 South Korea +82-32-890-1199 +82-32-890-2832
| | - Tran Duy Binh
- Department of Biomedical Science, BK21 FOUR Program in Biomedical Science and Engineering, Inha University College of Medicine Incheon 22212 South Korea +82-32-890-1199 +82-32-890-2832
| | - Huynh Nhu Thao
- Department of Chemistry, College of Natural Sciences, Can Tho University Can Tho 90000 Vietnam +84934527817
| | - Bui Thi Buu Hue
- Department of Chemistry, College of Natural Sciences, Can Tho University Can Tho 90000 Vietnam +84934527817
| | - Nguyen Trong Tuan
- Department of Chemistry, College of Natural Sciences, Can Tho University Can Tho 90000 Vietnam +84934527817
| | - Quang Le Dang
- Institute for Tropical Technology, Vietnam Academy of Science and Technology Hanoi 10000 Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology Hanoi 100000 Vietnam
| | - Nguyen Quoc Chau Thanh
- Department of Chemistry, College of Natural Sciences, Can Tho University Can Tho 90000 Vietnam +84934527817
| | - Nguyen Van Ky
- Department of Chemistry, College of Natural Sciences, Can Tho University Can Tho 90000 Vietnam +84934527817
| | - Minh Quan Pham
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology Hanoi 100000 Vietnam.,Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology Hanoi 100000 Vietnam
| | - Su-Geun Yang
- Department of Biomedical Science, BK21 FOUR Program in Biomedical Science and Engineering, Inha University College of Medicine Incheon 22212 South Korea +82-32-890-1199 +82-32-890-2832
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7
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Tuan NT, Dam NP, Van Hieu M, Trang DTX, Danh LT, Men TT, De TQ, Bach LT, Kanaori K. Chemical Constituents of the Lichen Parmotrema Tinctorum and their Antifungal Activity. Chem Nat Compd 2020. [DOI: 10.1007/s10600-020-03017-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Affiliation(s)
- Nguyen Thi Thu Tram
- Department of Chemistry, Faculty of Science, Can Tho University of Medicine and Pharmacy; 179, Nguyen Van Cu street, Ninh Kieu district, Can Tho City 94000 Viet Nam
| | - Dinh Hoang Anh
- Department of Chemical Engineering, Faculty of Engineering Technology, Can Tho University; Campus II, 3/2 street, Ninh Kieu district, Can Tho City 94000 Viet Nam
| | - Huynh Hoang Thuc
- Department of Chemistry, Faculty of Pharmacy, Hong Bang International University; 215 Dien Bien Phu street, Binh Thanh district Ho Chi Minh City 70000 Viet Nam
| | - Nguyen Trong Tuan
- Department of Chemistry, College of Natural Sciences, Can Tho University; Campus II, 3/2 street, Ninh Kieu district, Can Tho City 94000 Viet Nam
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9
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Trinh PTN, Giang BL, Tuan NT, Hang HTT, Thuy NTL, Tuan NN, Dung LT. Alfa glucosidase inhibitory, anti inflammatory activities and a new furanocoumarin derivative of Ruellia tuberosa. Nat Prod Res 2019; 35:4248-4255. [PMID: 31782667 DOI: 10.1080/14786419.2019.1696790] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 10/25/2022]
Abstract
Rullia tuberosa L. is used for treatment of diabetes mellitus, anti-inflammation, etc. However, its hypoglycaemic and anti inflammatory activities has not been investigated so far. In the present study, the α-glucosidase inhibitory, anti inflammatory activities of the extract of this plant were investigated. Our results showed that the crude extract as well as ethyl acetate and methanol fractions showed α-glucosidase inhibitory activity with IC50 of 15.84, 4.73 and 8.27 µg/ml, respectively. In addition, the hexane and ethyl acetate fractions are capable of inhibiting LPS-induced NO production with IC50 of 17.41 and 23.95 µg/mL, respectively. From the ethyl acetate and methanol fractions, eight compounds, including isobargaptol 5-O-β-D-glucopyranoside (1), syringaresinol (2), catechin (3), pulmatin (4), stigmast-4-en-3-on (4), verbascoside (5), hydroxymethylfurfural (6), rutin (7), and homoplantaginin (8) were extracted and isolated. Their chemical structures were elucidated by spectroscopic method including MS, 1 D and 2 D- NMR and comparison with the literature values.
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Affiliation(s)
- Pham Thi Nhat Trinh
- Department of Biochemistry, Faculty of Natural Sciences, Tiengiang University, Tiengiang, Vietnam
| | - Bach Long Giang
- NTT Institute of High Technology, Nguyen Tat Thanh University, Ho Chi Minh, Vietnam
| | - Nguyen Trong Tuan
- Department of Chemistry, College of Natural Sciences, Can Tho University, Can Tho, Vietnam
| | | | - Nguyen Thi Le Thuy
- Department of Food Technology, Faculty of Biotechnology, Ho Chi Minh City Open University, Ho Chi Minh, Vietnam
| | - Nguyen Ngoc Tuan
- Institute of Biotechnology and Food Technology, Industrial University of Ho Chi Minh City, Ho Chi Minh, Vietnam
| | - Le Tien Dung
- Department of Pharmaceutical Biochemistry, Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh, Vietnam.,Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha Noi, Vietnam
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10
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Affiliation(s)
- Nguyen Thi Thu Tram
- Department of Chemistry, Faculty of Science; Can Tho University of Medicine and Pharmacy; Viet Nam
| | - Tong Ho Dat
- Department of Chemistry, Faculty of Science; Can Tho University of Medicine and Pharmacy; Viet Nam
| | - Truong Hoai Phong
- Department of Chemistry, Faculty of Science; Can Tho University of Medicine and Pharmacy; Viet Nam
| | - Nguyen Phuc Dam
- Department of Chemistry, Faculty of Education; Can Tho University; Viet Nam
| | - Nguyen Trong Tuan
- Department of Chemistry, Faculty of Natural Science; Can Tho University; Viet Nam
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11
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Bach LT, Dung LT, Tuan NT, Phuong NT, Kestemont P, Quetin-Leclercq J, Hue BTB. Protective effect of pancreatic β
-cells MIN6 by some medicinal plants in the Mekong Delta. VJCH 2018. [DOI: 10.1002/vjch.201800062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Le Thi Bach
- Department of Chemistry, College of Natural Sciences; Can Tho University; Viet Nam
- Graduate University of Science and Technology; Viet Nam
| | - Le Tien Dung
- Institute of Applied Materials Science; Vietnam Academy of Science and Technology; Viet Nam
| | - Nguyen Trong Tuan
- Department of Chemistry, College of Natural Sciences; Can Tho University; Viet Nam
| | | | | | - Joëlle Quetin-Leclercq
- Laboratoire de Pharmacognosie, LDRI; Université catholique de Louvain; UCLouvain Belgium
| | - Bui Thi Buu Hue
- Department of Chemistry, College of Natural Sciences; Can Tho University; Viet Nam
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12
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Trinh PTN, An NH, An PN, Tri MD, Du CV, Minh PN, Thuy NTL, Tuan NT, Thoa VTK, Tuan NN, Dung LT. A new benzofuran derivative from the leaves of Ficus pumila L. Nat Prod Res 2017; 32:1648-1652. [DOI: 10.1080/14786419.2017.1395427] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Pham Thi Nhat Trinh
- Faculty of Natural Sciences, Department of Biochemistry, Tiengiang University, Tiengiang, Vietnam
| | - Nguyen Huu An
- Department of Pharmaceutical Biochemistry, Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Pham Ngoc An
- Department of Pharmaceutical Biochemistry, Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Mai Dinh Tri
- Department of Bioactive Compound, Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Cao Van Du
- Faculty of Pharmacy, Lachong University, Dongnai, Vietnam
| | - Phan Nhat Minh
- Department of Bioactive Compound, Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Nguyen Thi Le Thuy
- Faculty of Biotechnology, Department of Food Technology, Open University Ho Chi Minh City, Vietnam
| | - Nguyen Trong Tuan
- Department of Chemistry, College of Natural Sciences, Can Tho Univesity, Cantho, Vietnam
| | - Vang Thi Kim Thoa
- Faculty of Applied Sciences, Department of Biotechnology, Ton Duc Thang University, Ho Chi Minh City, Vietnam
| | - Nguyen Ngoc Tuan
- Institute of Biotechnology and Food Technology, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Le Tien Dung
- Department of Pharmaceutical Biochemistry, Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha Noi, Vietnam
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Thu Tram NT, Tuan NT, Marylène CK, Solenn F, Joël B. Chemical constituents of the lichen Dermatocarpon luridum and pKa value of isolated mycosporine. VJChem 2017. [DOI: 10.15625/2525-2321.2017-004503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Abstract
OBJECTIVE To provide an overview of dynamic shifts in body mass index (BMI) and nutritional status patterns of the Vietnamese population from 1992 to 2002. DESIGN Nationally representative, cross-sectional surveys. SETTING AND SUBJECTS Secondary data obtained from The Living Standard Survey in 1992 (24 068 individuals) and the National Health Survey in 2002 (158 019 individuals). METHODS Nutrition status was defined by comparing measured BMI, grouped for under- and overweight with the Centers for Disease Control and Prevention 2000 BMI growth charts for the 2-17 year-olds and the World Health Organization 1995 cutoff points for the 18-65 year-olds. RESULTS Over the 1992 and 2002 period, minimal changes were observed in the prevalence of overweight (from 1.4% (95% confidence interval (95% CI): 1.0-1.8) to 1.8% (1.6-2.0)) and underweight (from 32.1% (30.4-33.7) to 33.5% (32.8-34.1)) among 2-17 year-olds. In contrast, among 18-65 year-olds, the prevalence of overweight and obesity increased (from 2.0% (1.5-2.4) to 5.2% (5.0-5.4)) and underweight declined (from 32.6% (31.2-33.9) to 24.8% (24.3-25.3)). Urban residents experienced larger reductions in underweight and increases in overweight than rural residents. Analyses of BMI levels for the 15th, 50th and 85th percentiles, by age, revealed a trend of increasing BMI that was higher among adults, females and urban residents. CONCLUSION Although underweight remains the main concern, overweight is an emerging problem in Vietnam. Early prevention is needed to prevent overweight from causing undesirable effects on health and economic in the transitional period.
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Affiliation(s)
- N T Tuan
- Department of Nutrition and Carolina Population Center, University of North Carolina, Chapel Hill, NC 27516-3997, USA
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Trung TN, Davis TM, Hewitt S, Thuan LK, Quang HH, Anh CV, Thuy PT, Thoa NT, Tuan NT, Hang NT, Giang LT. Treatment of falciparum malaria in Vietnamese children: the need for combination therapy and optimized dosage regimens. Ann Trop Paediatr 2001; 21:307-12. [PMID: 11732148 DOI: 10.1080/02724930127007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
To assess the in vivo sensitivity of Plasmodium falciparum to mefloquine and artesunate in a hyperendemic area of southern Viet Nam, we studied 41 children and 21 adults from a remote commune who had uncomplicated falciparum malaria without previous treatment. Patients were randomly allocated to artesunate (4 mg/kg on day 0 and 2 mg/kg on days 1-4) or mefloquine (10 mg/kg followed by 5 mg/kg at 6 h). Serial assessments were performed over 28 days. Of 31 patients allocated artesunate, nine (29%) redeveloped parasitaemia during follow-up compared with 23% (seven of 30) who received mefloquine. Of the 41 children, 15 (37%) had recrudescence/re-infection compared with only one of 20 adults (5%; p < 0.001). Significantly more children than adults failed on mefloquine treatment (37% vs 0%; p = 0.021) and one case showed RIII resistance. There was no significant difference in the case of artesunate. In regression analysis, parasitaemia was an independent predictor of recrudescence/re-infection after mefloquine (p = 0.02). These data support the use of combination therapy such as artesunate plus mefloquine for falciparum malaria in a hyperendemic area of Viet Nam. Primarily because of their greater parasite densities, children should be given higher doses of mefloquine (e.g. 25 mg/kg).
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Affiliation(s)
- T N Trung
- Institute of Malariology, Parasitology and Entomology, Quy Nhon City, Binh Dinh Province, Viet Nam
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