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Tran TH, Le TH, Nguyen THT, Vong LB, Nguyen TMT, Nguyen NT, Dang PH. Discovery of Alkyl Triphenylphosphonium Pinostrobin Derivatives as Potent Anti-Breast Cancer Agents. Chem Biodivers 2024:e202400864. [PMID: 38699953 DOI: 10.1002/cbdv.202400864] [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] [Received: 04/03/2024] [Revised: 05/02/2024] [Accepted: 05/03/2024] [Indexed: 05/05/2024]
Abstract
Pinostrobin demonstrated anticancer properties, but its hydrophobic feature led to a reduction in bioavailability. The mitochondria-targeted approach successfully synthesized eight new alkyl triphenylphosphonium pinostrobin derivatives (1-8) with good yield in this study. Seven compounds (1-3, 5-8) showed greater cytotoxic potency against the human MCF-7 breast cancer cell line than pinostrobin. Molecular docking studies were performed with two important targets in hormone-dependent anticancer strategies, estrogen receptor α (ERα) ligand binding domains, 3ERT (antagonist recognition and antiproliferative function), and 1GWR (agonist recognition and pro-proliferative function). In addition, the MD simulation study of the two most potent compounds (2 and 3) complexed with both ERα forms suggested that compounds 2 and 3 could serve as favourable antagonists. Furthermore, the in silico ADMET prediction indicated that compounds 2 and 3 could be potential drug candidates.
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Affiliation(s)
- Tu Hoai Tran
- VNUHCM University of Science, Organic Chemistry, 227 Nguyen Van Cu, Ho Chi Minh, VIET NAM
| | - Tho Huu Le
- VNUHCM University of Science, Medicinal Chemistry, 227 Nguyen Van Cu, Ho Chi Minh, VIET NAM
| | - Thu-Ha Thi Nguyen
- International University VNUHCM, School of Biomedical Engineering, Linh Trung, Ho Chi Minh, VIET NAM
| | - Long Binh Vong
- International University VNUHCM, School of Biomedical Engineering, Linh Trung, Ho Chi Minh, VIET NAM
| | - Thanh Mai Thi Nguyen
- VNUHCM University of Science, Medicinal Chemistry, 227 Nguyen Van Cu, Ho Chi Minh, VIET NAM
| | - Nhan Trung Nguyen
- VNUHCM University of Science, Organic Chemistry, 227 Nguyen Van Cu, Ho Chi Minh, VIET NAM
| | - Phu Hoang Dang
- VNUHCM University of Science, Organic Chemistry, 227 Nguyen Van Cu Str., Dist. 5, Ho Chi Minh City, Vietnam, 70000, HCM, VIET NAM
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2
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Le TH, Nguyen NKT, Nguyen MTT, Nguyen NT. Two new phenylbutenoids from the rhizomes of cassumunar ginger and their α-glucosidase inhibitory activity. Nat Prod Res 2024; 38:1545-1552. [PMID: 36576074 DOI: 10.1080/14786419.2022.2157826] [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: 08/03/2022] [Revised: 11/29/2022] [Accepted: 12/06/2022] [Indexed: 12/29/2022]
Abstract
An extract from the rhizomes of Cassumunar ginger (Zingiber purpureum Roscoe). was found to have significant α-glucosidase inhibitory activity with an IC50 value of 6.3 µg/mL. Two new phenylbutenoids, cassudimin A (1) and cassumunol N (2), and seven known compounds (3-9) were isolated. Their structures and relative configurations of two new compounds were elucidated based on spectra interpretation. Compounds 1-3, 6-9 showed more potent α-glucosidase inhibitory activity than a positive control, acarbose (IC50 = 168.0 µM). Dehydrozingerone (6) exhibited the most potent α-glucosidase inhibition with an IC50 value of 8.3 μM. Compounds 7 and 9 were found in Z. purpureum rhizomes for the first time.
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Affiliation(s)
- Tho Huu 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
| | - Ngan Kim Thi Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Mai Thanh Thi 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
- Cancer Research Laboratory, University of Science, Ho Chi Minh City, Vietnam
| | - Nhan Trung 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
- Cancer Research Laboratory, University of Science, Ho Chi Minh City, Vietnam
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Le TH, Ho DNP, Nguyen HX, Van Do TN, Nguyen MTT, Huynh LK, Nguyen NT. In vitro biological evaluation and in silico studies of linear diarylheptanoids from Curcuma aromatica Salisb. as urease inhibitors. RSC Med Chem 2024; 15:1046-1054. [PMID: 38516598 PMCID: PMC10953472 DOI: 10.1039/d3md00645j] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 01/31/2024] [Indexed: 03/23/2024] Open
Abstract
Plants of the Zingiberaceae family, specifically those belonging to the Curcuma species, are commonly under consideration as potential therapeutic agents for the management of gastrointestinal diseases. In this study, we carried out a phytochemical study on Curcuma aromatica Salisb. (or so-called "Nghe trang" in Vietnamese) grown in Vietnam, which yields three newly discovered 3,5-diacetoxy diarylheptanoids (1-3) and six known 3,5-dihydroxyl diarylheptanoids (4-9). The bioactivity assessment shows that all isolated compounds, except compounds 3, 7, and 8, could inhibit urease. Compounds 4 and 9 significantly inhibit urease, with an IC50 value of 9.6 and 21.4 μM, respectively, more substantial than the positive control, hydroxyurea (IC50 = 77.4 μM). The structure-activity relationship (SAR) of linear diarylheptanoids was also established, suggesting that the hydroxyl groups at any position of skeleton diarylheptanoids are essential for exerting anti-urease action. Through a comparative analysis of the binding sites of hydroxyurea and diarylheptanoid compounds via our constructed in silico model, the mechanism of action of diarylheptanoid compounds is predicted to bind to the dynamic region close to the dinickel active center, resulting in a loss of catalytic activity. Such insights certainly help design and/or find diarylheptanoid-based compounds for treating gastric ulcers through inhibiting urease.
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Affiliation(s)
- Tho Huu Le
- Faculty of Chemistry, University of Science Ho Chi Minh City Vietnam
- Research Lab for Drug Discovery and Development, University of Science Ho Chi Minh City Vietnam
- Vietnam National University of Ho Chi Minh City Ho Chi Minh City Vietnam
| | - Dung Ngoc Phuong Ho
- School of Chemical and Environmental Engineering, International University Ho Chi Minh City Vietnam
- Vietnam National University of Ho Chi Minh City Ho Chi Minh City Vietnam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science Ho Chi Minh City Vietnam
- Research Lab for Drug Discovery and Development, University of Science Ho Chi Minh City Vietnam
- Vietnam National University of Ho Chi Minh City Ho Chi Minh City Vietnam
| | - Truong Nhat Van Do
- Faculty of Chemistry, University of Science Ho Chi Minh City Vietnam
- Research Lab for Drug Discovery and Development, University of Science Ho Chi Minh City Vietnam
- Vietnam National University of Ho Chi Minh City Ho Chi Minh City Vietnam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, University of Science Ho Chi Minh City Vietnam
- Research Lab for Drug Discovery and Development, University of Science Ho Chi Minh City Vietnam
- Vietnam National University of Ho Chi Minh City Ho Chi Minh City Vietnam
| | - Lam K Huynh
- School of Chemical and Environmental Engineering, International University Ho Chi Minh City Vietnam
- Vietnam National University of Ho Chi Minh City Ho Chi Minh City Vietnam
| | - Nhan Trung Nguyen
- Faculty of Chemistry, University of Science Ho Chi Minh City Vietnam
- Research Lab for Drug Discovery and Development, University of Science Ho Chi Minh City Vietnam
- Vietnam National University of Ho Chi Minh City Ho Chi Minh City Vietnam
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Dang PH, Le TH, Van Do TN, Nguyen HX, Nguyen MTT, Nguyen NT. Paratrimerin Z, an undescribed chromene derivative from the roots of Paramignya trimera. Nat Prod Res 2024; 38:327-330. [PMID: 36008765 DOI: 10.1080/14786419.2022.2113996] [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: 02/24/2022] [Revised: 08/08/2022] [Accepted: 08/13/2022] [Indexed: 10/15/2022]
Abstract
From an EtOAc-soluble fraction of the roots of Paramignya trimera, one undescribed chromene derivative, paratrimerin Z (1), was isolated. Its structure was elucidated on the basis of NMR spectroscopic interpretation. The absolute configuration of 1 was determined by the specific rotation analysis of its acid-catalyzed hydrolysis product. Paratrimerin Z (1), at a concentration of 100 μM, did not show cytotoxicity against Hep3B human liver cancer cell line.
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Affiliation(s)
- Phu Hoang Dang
- University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Tho Huu Le
- University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Truong Nhat Van Do
- University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Hai Xuan Nguyen
- University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Mai Thanh Thi Nguyen
- 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
| | - Nhan Trung Nguyen
- 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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Nguyen LC, Nguyen NM, Nguyen TN, Vu HH, Khuc TT, La HD, Nguyen NT, Nguyen KV, Nguyen OT, Luu DTM, Doan HTN. 2-year survival estimation for decompensated cirrhosis patients of prognostic scoring systems. Eur Rev Med Pharmacol Sci 2023; 27:10909-10916. [PMID: 38039020 DOI: 10.26355/eurrev_202311_34458] [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: 12/02/2023]
Abstract
OBJECTIVE Prognostic models proposed for cirrhotic patients' survival have not been satisfactorily investigated in the Vietnam population, especially in the medium-term period. PATIENTS AND METHODS In this prospective study, we enrolled a total of 904 patients admitted to Hepato-Gastroenterology Center, Bach Mai Hospital from December 2019 to November 2021 and calculated their CP, MELD, MELD-Na score, IMELD, Refit MELD, and Refit MELD-Na after 2-year follow-up to compare their survival prognosis. RESULTS The mean age of the patients was 53.8 ±10.8 years, and males constituted 91%. Compared with the surviving group, deceased patients had statistically significant lower albumin, higher INR, serum bilirubin, and creatinine levels with higher means of all prognostic scores. RefitMELD score had the highest AUC (0.768), followed by MELD (0.766), and the lowest belonged to RefitMELDNa (0.669). CONCLUSIONS In conclusion, deceased patients had significantly higher values of Child-Pugh score and all MELD-based scores than survival. RefitMELD is the most reliable scoring system to predict 2-year mortality in patients with decompensated liver cirrhosis.
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Affiliation(s)
- L C Nguyen
- Gastroenterology and Hepatology Center, Bach Mai Hospital, Giai Phong Road, Ha Noi, Vietnam.
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Le TH, Dang PH, Truong HN, Dang TM, Nguyen HX, Do TNV, Nguyen MTT, Nguyen NT. A novel diphenylbutenoid-type compound from the rhizomes of Zingiber montanum (J.Koenig) Link ex A.Dietr. (Zingiberaceae). Nat Prod Res 2023:1-6. [PMID: 37403594 DOI: 10.1080/14786419.2023.2230343] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/06/2023]
Abstract
From the EtOAc-soluble extract of the rhizomes of Zingiber montanum (J.Koenig) Link ex A.Dietr., a novel diphenylbutenoid, montadinin A (1) and a previously unreported phenylbutenoid compound, 1-(3,4-dimethoxyphenyl)but-3-en-2-ol (7), in natural source were isolated. Additionally, seven known phenylbutenoids were also identified. The structures of all compounds were elucidated through NMR spectroscopic interpretation. Compounds cis-3-(3,4-dimethoxyphenyl)-4-[(E)-3,4-dimethoxystyryl]cyclohex-1-ene (2), cis-4-[(E)-3,4-dimethoxystyryl]-3-(2,4,5-trimethoxyphenyl)cyclohex-1-ene (3), trans-3-(3,4,-dimethoxyphenyl)-4-[(E)-2,4,5-trimethoxystyryl]cyclohex-1-ene (5), and cis-3-(3,4-dimethoxyphenyl)-4-[(Z)-2,4,5-trimethoxylstyryl]cyclohex-1-ene (6) showed weak cytotoxicity against HepG2 cells with IC50 values of 122.9, 127.3, 257.5, and 168.5 µM, respectively.
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Affiliation(s)
- Tho Huu 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
| | - Phu Hoang 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
| | - Hai Nhung Truong
- Faculty of Biology and Biotechnology, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Thanh Minh Dang
- Faculty of Biology and Biotechnology, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
- Laboratory of Stem Cell Research and Application, University of Science, Ho Chi Minh City, Vietnam
| | - Hai Xuan 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
| | - Truong Nhat Van 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
| | - Mai Thanh Thi 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 Trung 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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7
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Velen K, Nguyen TA, Pham CD, Le HT, Nguyen HB, Dao BT, Nguyen TV, Nguyen NT, Nguyen NV, Fox GJ. The effect of medication event reminder monitoring on treatment adherence of TB patients. Int J Tuberc Lung Dis 2023; 27:322-328. [PMID: 37035979 DOI: 10.5588/ijtld.22.0500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2023] Open
Abstract
BACKGROUND: TB control remains a serious public health problem, compounded by poor treatment adherence, which increases the likelihood of onward transmission. We evaluated the effectiveness of medication event reminder monitoring (MERM) upon treatment adherence in a high TB burden setting.METHODS: We conducted an open-label parallel group randomised controlled trial among pulmonary TB adults. Participants were provided with a MERM device to store their medications. In the intervention arm, the devices were set to provide daily medication intake reminders. Primary outcome was the proportion of patient-months in which at least 6/30 doses were missed. Secondary outcomes included 1) the proportion of patient-months in which at least 14/30 doses were missed, and 2) the proportion of doses missed.RESULTS: Of 2,142 patients screened, 798 (37.3%) met the inclusion criteria and 250 participants were enrolled. The mean ratio (MR) for poor adherence between the intervention and control groups was 0.72 (95% CI 0.55-0.86). The intervention was also associated with a reduction in the proportion of patients missing at least 14/30 doses (MR 0.61, 95% CI 0.54-0.68) and the percentage of total doses missed (MR 0.75, 95% CI 0.68-0.80).CONCLUSION: MERM is effective in improving TB treatment adherence in a resource-limited environment.
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Affiliation(s)
- K Velen
- Woolcock Institute of Medical Research, Hanoi, Vietnam, Faculty of Medicine and Health, Central Clinical School, University of Sydney, Sydney, NSW, Australia
| | - T-A Nguyen
- Woolcock Institute of Medical Research, Hanoi, Vietnam, Faculty of Medicine and Health, Central Clinical School, University of Sydney, Sydney, NSW, Australia
| | - C D Pham
- Woolcock Institute of Medical Research, Hanoi, Vietnam
| | - H T Le
- Woolcock Institute of Medical Research, Hanoi, Vietnam
| | | | - B T Dao
- Thanh Hoa Lung Hospital, Thanh Hoa, Vietnam
| | - T V Nguyen
- Thanh Hoa Lung Hospital, Thanh Hoa, Vietnam
| | - N T Nguyen
- Thanh Hoa Lung Hospital, Thanh Hoa, Vietnam
| | | | - G J Fox
- Woolcock Institute of Medical Research, Hanoi, Vietnam, Faculty of Medicine and Health, Central Clinical School, University of Sydney, Sydney, NSW, Australia
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Do TNV, Nguyen HX, Le TH, Dang PH, Nguyen NT, Nguyen MTT. Taxotrophises A and B, two new polyphenols from the stems of Taxotrophis ilicifolius. Nat Prod Res 2023:1-6. [PMID: 36606539 DOI: 10.1080/14786419.2022.2164579] [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] [Received: 10/31/2022] [Revised: 12/19/2022] [Accepted: 12/25/2022] [Indexed: 01/07/2023]
Abstract
From the EtOAc extract of the wood of the stems of Taxotrophis ilicifolius (Moraceae), two new secondary metabolites, named taxotrophises A (1) and B (2), were isolated, together with five known compounds (3-7). Their chemical structures have been elucidated by extensive NMR spectroscopic analysis. All isolated compounds have been evaluated for α-glucosidase inhibitory activity. In the present work, compounds 1 and 4 showed the strongest α-glucosidase inhibitory activity with IC50 values of 6.5 and 1.5 μM, respectively, and stronger than that of a positive control, acarbose (IC50; 214.5 μM).
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Affiliation(s)
- Truong Nhat Van 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 Xuan 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
| | - Tho Huu 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
| | - Phu Hoang 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
| | - Nhan Trung 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
- Cancer Research Laboratory, University of Science, Ho Chi Minh City, Vietnam
| | - Mai Thanh Thi 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
- Cancer Research Laboratory, University of Science, Ho Chi Minh City, Vietnam
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Titze TL, Hamnvik LHD, Hauglum IM, Carlsen AET, Tjeldhorn L, Nguyen NT, Akkök ÇA. Management of Wrong Blood Transfusion to an RhD Negative Woman in Labor. Int J Womens Health 2023; 15:1-6. [PMID: 36628052 PMCID: PMC9826603 DOI: 10.2147/ijwh.s390661] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 12/06/2022] [Indexed: 01/12/2023] Open
Abstract
Blood transfusion is life-saving in massive hemorrhage. Before pre-transfusion tests with ABO and RhD typing results are available, O RhD negative packed red blood cell (PRBC) units are used without cross-matching in emergency. RhD negative girls and women of child-bearing age should always receive RhD negative blood transfusions to prevent RhD-alloimmunization because anti-D-related hemolytic disease of fetus and newborn (HDFN) can result in mild to severe anemia, and in a worst-case scenario death of an RhD positive fetus and/or newborn. However, "wrong blood to wrong patient" happens unintentionally. Here we report an emergency blood transfusion with one unit of RhD positive PRBCs to an RhD negative young woman when estimated blood loss was 2500 mL during delivery and surgical removal of retained placenta. Realizing the mistake, management with high dose anti-D immunoglobulin (Ig) was initiated to remove the RhD positive red blood cells (RBCs) from the patient's circulation. Such mitigation is recommended only for girls and women of child-bearing age. Follow-up was performed by flow cytometry until RhD positive RBCs were no longer detected. Ten months after the delivery, antibody screening was negative. However, we still do not know whether we managed to prevent RhD-alloimmunization.
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Affiliation(s)
- Thomas Larsen Titze
- Department of Laboratory Medicine, Vestre Viken Health Trust, Drammen, Norway
| | | | - Inga Marie Hauglum
- Department of Laboratory Medicine, Vestre Viken Health Trust, Drammen, Norway
| | | | - Lena Tjeldhorn
- Department of Immunology and Transfusion Medicine, Oslo University Hospital, Oslo, Norway
| | - Nhan Trung Nguyen
- Department of Immunology and Transfusion Medicine, Oslo University Hospital, Oslo, Norway
| | - Çiğdem Akalın Akkök
- Department of Immunology and Transfusion Medicine, Oslo University Hospital, Oslo, Norway,Correspondence: Çiğdem Akalın Akkök, Department of Immunology and Transfusion Medicine, Oslo University Hospital, Ullevaal, Kirkeveien 166, Oslo, N-0407, Norway, Tel +47 92 03 47 47, Fax + 47 22 11 88 50, Email
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10
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Le TH, Dang PH, Nguyen HX, Do TNV, Nguyen NT, Nguyen MTT. Strebluses E-H, four new stilbene-like derivatives from the stems of Streblus ilicifolius. RSC Adv 2022; 13:570-574. [PMID: 36605660 PMCID: PMC9773016 DOI: 10.1039/d2ra07294g] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 12/09/2022] [Indexed: 12/24/2022] Open
Abstract
Following bioactivity-guided isolation, four new stilbene-like derivatives, named Strebluses E-H, were isolated from the EtOAc-soluble fraction of the stems of Streblus ilicifolius (Moraceae). Their chemical structures were elucidated based on NMR spectroscopic data interpretation and optical rotation calculation. Streblus E possesses potent tyrosinase inhibitory activity with an IC50 value of 0.1 μM. Oxy-tyrosinase has two bound Cu2+ ions and a peroxide group in the binding site, which has a role in the catalytic oxidation. Thus, a docking study of Streblus E with oxy-tyrosinase was performed to analyze the ligand-protein interactions. With in silico modelling, the S value and the ligand-protein interactions suggested that Streblus E showed lower binding affinity for oxy-tyrosinase than that of Streblus C.
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Affiliation(s)
- Tho Huu Le
- Faculty of Chemistry, University of ScienceHo Chi Minh City72711Vietnam,Vietnam National UniversityHo Chi Minh City71300Vietnam,Research Lab for Drug Discovery and Development, University of ScienceHo Chi Minh City72711Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, University of ScienceHo Chi Minh City72711Vietnam,Vietnam National UniversityHo Chi Minh City71300Vietnam,Research Lab for Drug Discovery and Development, University of ScienceHo Chi Minh City72711Vietnam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of ScienceHo Chi Minh City72711Vietnam,Vietnam National UniversityHo Chi Minh City71300Vietnam,Research Lab for Drug Discovery and Development, University of ScienceHo Chi Minh City72711Vietnam
| | - Truong Nhat Van Do
- Faculty of Chemistry, University of ScienceHo Chi Minh City72711Vietnam,Vietnam National UniversityHo Chi Minh City71300Vietnam,Research Lab for Drug Discovery and Development, University of ScienceHo Chi Minh City72711Vietnam
| | - Nhan Trung Nguyen
- Faculty of Chemistry, University of ScienceHo Chi Minh City72711Vietnam,Vietnam National UniversityHo Chi Minh City71300Vietnam,Research Lab for Drug Discovery and Development, University of ScienceHo Chi Minh City72711Vietnam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, University of ScienceHo Chi Minh City72711Vietnam,Vietnam National UniversityHo Chi Minh City71300Vietnam,Research Lab for Drug Discovery and Development, University of ScienceHo Chi Minh City72711Vietnam
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11
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Dang PH, Nguyen HX, Le TH, Van Do TN, Nguyen MTT, Nguyen NT. A New abeo-Icetexane-Type Diterpenoid from the Stem Barks of Taxus wallichiana. Chem Biodivers 2022; 19:e202200520. [PMID: 36380709 DOI: 10.1002/cbdv.202200520] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 11/15/2022] [Indexed: 11/17/2022]
Abstract
From a CH2 Cl2 -soluble fraction of the stem barks of Taxus wallichiana, one new abeo-icetexane-type diterpenoid, taxamairin I (1), was isolated. Its absolute configuration was elucidated based on spectroscopic interpretation and time-dependent density functional theory (TD-DFT) calculation of optical rotation. In addition, the plausible biosynthesis pathway for the formation of the new abeo-icetexane-type diterpenoid was proposed. Taxamairin I (1), at a concentration of 100 μM, did not show cytotoxicity against Hep3B human liver cancer cell lines.
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Affiliation(s)
- Phu Hoang 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
| | - Hai Xuan 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
| | - Tho Huu 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 Nhat Van 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
| | - Mai Thanh Thi 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
- Cancer Research Laboratory, University of Science, Ho Chi Minh City, Vietnam
| | - Nhan Trung 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
- Cancer Research Laboratory, University of Science, Ho Chi Minh City, Vietnam
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12
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Hetland G, Fagerhol MK, Dimova-Svetoslavova VP, Mirlashari MR, Nguyen NT, Lind A, Kolset SO, Søraas AVL, Nissen-Meyer LSH. Inflammatory markers calprotectin, NETs, syndecan-1 and neopterin in COVID-19 convalescent blood donors. Scand J Clin Lab Invest 2022; 82:481-485. [PMID: 36151851 DOI: 10.1080/00365513.2022.2123387] [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] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Persisting inflammation has been discovered in lungs and other parenchymatous organs of some COVID-19 convalescents. Calprotectin, neutrophil extracellular traps (NETs), syndecan-1 and neopterin are general key inflammatory markers, and systemically enhanced levels of them may remain after the COVID-19 infection. These inflammatory markers were therefore measured in serum samples of 129 COVID-19 convalescent and 27 healthy blood donors or employees at Oslo Blood bank, Norway. Also antibodies against SARS-CoV-2 nucleocapsid antigen were measured, and timing of sampling and severity of infection noted. Whereas neopterin and NETs values remained low and those for syndecan-1 were not raised to statistically significant level, concentrations for calprotectin, as measured by a novel mixed monoclonal assay, were significantly increased in the convalescents. Antibodies against SARS-CoV-2 nucleocapsid antigen were elevated, but did not correlate with levels of inflammatory markers. Difference between the groups in only one biomarker makes evaluation of ongoing or residual inflammation in the convalescents difficult. If there is a low-grade inflammation, it would in that case involve neutrophils.
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Affiliation(s)
- Geir Hetland
- Department of Immunology and Transfusion Medicine, Oslo University Hospital, Oslo, Norway.,Department of Immunology, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | | | | | | | - Nhan Trung Nguyen
- Department of Immunology and Transfusion Medicine, Oslo University Hospital, Oslo, Norway
| | - Andreas Lind
- Department of Microbiology, Oslo University Hospital, Oslo, Norway
| | - Svein Olav Kolset
- Department of Nutrician, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
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13
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Kondolf GM, Schmitt RJP, Carling PA, Goichot M, Keskinen M, Arias ME, Bizzi S, Castelletti A, Cochrane TA, Darby SE, Kummu M, Minderhoud PSJ, Nguyen D, Nguyen HT, Nguyen NT, Oeurng C, Opperman J, Rubin Z, San DC, Schmeier S, Wild T. Save the Mekong Delta from drowning. Science 2022; 376:583-585. [PMID: 35536906 DOI: 10.1126/science.abm5176] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Policy must address drivers, not just symptoms, of subsidence.
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Affiliation(s)
- G M Kondolf
- Riverlab, Department of Landscape Architecture and Environmental Planning, University of California, Berkeley, CA, USA
| | - R J P Schmitt
- Riverlab, Department of Landscape Architecture and Environmental Planning, University of California, Berkeley, CA, USA
- The Natural Capital Project, Stanford University, Stanford, CA, USA
| | - P A Carling
- School of Geography and Environmental Science, University of Southampton, Southampton, UK
| | - M Goichot
- World Wide Fund for Nature Asia Pacific, Ho Chi Minh City, Vietnam
| | - M Keskinen
- Water and Development Research Group, Aalto University, Espoo, Finland
| | - M E Arias
- Department of Civil and Environmental Engineering, University of South Florida, Tampa, FL, USA
| | - S Bizzi
- Department of Geosciences, University of Padova, Padua, Italy
| | - A Castelletti
- Department of Electronics, Information, and Bioengineering, Politecnico di Milano, Piazza Leonardo da Vinci, Milano, Italy
| | - T A Cochrane
- Department of Civil and Natural Resources Engineering, University of Canterbury, Christchurch, New Zealand
| | - S E Darby
- School of Geography and Environmental Science, University of Southampton, Southampton, UK
| | - M Kummu
- Water and Development Research Group, Aalto University, Espoo, Finland
| | - P S J Minderhoud
- Soil Geography and Landscape group, Wageningen University, Netherlands
- Department of Civil, Environmental and Architectural Engineering, University of Padova, Padova, Italy
- Subsurface and Groundwater Systems Unit, Deltares Research Institute, Utrecht, Netherlands
| | - D Nguyen
- Laboratory for Hydraulics Saint-Venant, Université PARIS-EST, Chatou, France
| | | | - N T Nguyen
- University of Science, Vietnam National University, Ho Chi Minh City, Vietnam
| | - C Oeurng
- Riverlab, Department of Landscape Architecture and Environmental Planning, University of California, Berkeley, CA, USA
- Institute of Technology of Cambodia, Phnom Penh, Cambodia
| | - J Opperman
- Global Science, World Wildlife Fund, Washington, DC, USA
| | - Z Rubin
- Riverlab, Department of Landscape Architecture and Environmental Planning, University of California, Berkeley, CA, USA
- Balance Hydrologics, Berkeley, CA, USA
| | - D C San
- Southern Institute of Water Resources Research, Ho Chi Minh City, Vietnam
| | - S Schmeier
- Water Governance Department, IHE Delft Institute for Water Education, Delft, Netherlands
| | - T Wild
- University of Maryland, College Park, MD, USA
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14
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Van Do TN, Le TH, Nguyen HX, Vo TNT, Dang PH, Nguyen NT, Nguyen MTT. δ-Tocopherol derivatives from the leaves of Muntingia calabura L. Nat Prod Res 2021; 36:5524-5529. [PMID: 34933616 DOI: 10.1080/14786419.2021.2018589] [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: 10/19/2022]
Abstract
From an ethyl acetate-soluble fraction of the leaves of Muntingia calabura, one new trimeric δ-tocopherol derivative named as tocomuntin A (1), together with three known δ-tocopherol derivatives (2-4) were isolated. Their structures were elucidated based on the interpretation of NMR and MS spectroscopic data. In this work, δ-tocopherol (3) was found to have α-glucosidase inhibitory activity for the first time (IC50, 47.3 μM).
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Affiliation(s)
- Truong Nhat Van Do
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Tho Huu Le
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Trang Ngoc Tran Vo
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Nhan Trung 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
| | - Mai Thanh Thi 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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15
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Van Do TN, Nguyen HX, Le TH, Dang PH, Nguyen MT, Thi Nguyen MT, Nguyen NT. A new diphenylheptanoid from the rhizomes of Curcuma zedoaria. Z NATURFORSCH C 2021; 77:219-223. [PMID: 34787385 DOI: 10.1515/znc-2021-0096] [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] [Received: 04/03/2021] [Accepted: 11/01/2021] [Indexed: 11/15/2022]
Abstract
A phytochemical investigation of the rhizomes of Curcuma zedoaria was carried out, leading to the isolation of a new diphenylheptanoid, zedoaroxane A (1), together with four known compounds (2-5). Their structures were elucidated based on NMR spectroscopic data. All isolated compounds possessed α-glucosidase inhibitory activity, with the IC50 values ranging from 35.2 to 89.0 µM, more potent than that of the positive control acarbose (IC50, 214.5 µM).
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Affiliation(s)
- Truong Nhat Van Do
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Tho Huu Le
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Mai Thanh Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Mai Thanh Thi 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
| | - Nhan Trung 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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16
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Shelley D, Cleland CM, Nguyen T, Van Devanter N, Siman N, Van M H, Nguyen NT. Effectiveness of a multicomponent strategy for implementing guidelines for treating tobacco use in Vietnam Commune Health Centers. Nicotine Tob Res 2021; 24:196-203. [PMID: 34543422 DOI: 10.1093/ntr/ntab189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 09/15/2021] [Indexed: 11/13/2022]
Abstract
INTRODUCTION Strategies are needed to increase implementation of evidence-based tobacco dependence treatment (TDT) in health care systems in low-and middle-income countries (LMICs). METHODS We conducted a two-arm cluster randomized controlled trial to compare the effectiveness of two strategies for implementing TDT guidelines in community health centers (n=26) in Vietnam. Arm 1 included training and a tool kit (e.g., reminder system) to promote and support delivery of the 4As (Ask about tobacco use, Advise to quit, Assess readiness, Assist with brief counseling) (Arm 1). Arm 2 included Arm 1 components plus a system to refer smokers to a community health worker (CHW) for more intensive counseling (4As+R). Provider surveys were conducted at baseline, six- and 12-months to assess the hypothesized effect of the strategies on provider and organizational-level factors. The primary outcome was provider adoption of the 4As. RESULTS Adoption of the 4As increased significantly across both study arms (all p<.001). Perceived organizational priority for TDT, compatibility with current workflow, and provider attitudes, norms and self-efficacy related to TDT also improved significantly across both arms. In Arm 2 sites, 41% of smokers were referred to a CHW for additional counseling. CONCLUSION The study demonstrated the effectiveness of a multicomponent and multilevel strategy (i.e., provider and system) for implementing evidence-based TDT in the Vietnam public health system. Combining provider-delivered brief counseling with opportunities for more in-depth counseling offered by a trained CHW may optimize outcomes and offers a potentially scalable model for increasing access to TDT in health care systems like Vietnam. IMPLICATIONS Improving implementation of evidence-based tobacco dependence treatment (TDT) guidelines is a necessary step towards reducing the growing burden of non-communicable disease (NCDs) and premature death in LMICs. The findings provide new evidence on the effectiveness of multilevel strategies for adapting and implementing TDT into routine care in Vietnam, and offers a potentially scalable model for meeting FCTC Article 14 goals in other LMICs with comparable public health systems. The study also demonstrates that combining provider-delivered brief counseling with referral to a community health worker for more in-depth counseling and support can optimize access to evidence-based treatment for tobacco use.
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Affiliation(s)
- D Shelley
- New York University School of Global Public Health, New York, NY
| | - C M Cleland
- New York University Grossman School of Medicine, Department of Population Health, NY
| | - T Nguyen
- Institute of Social and Medical Studies, My Dinh Ward, South Tu Liem District, Ha Noi, Vietnam
| | - N Van Devanter
- Rory Myers College of Nursing, New York University, New York, NY
| | - N Siman
- New York University Grossman School of Medicine, Department of Population Health, NY
| | - Hoang Van M
- Minh Hoang Van, MD, Hanoi University of Public Health, Duc Thang Ward, North Tu Liem district, Hanoi, Vietnam
| | - N T Nguyen
- Institute of Social and Medical Studies, My Dinh Ward, South Tu Liem District, Ha Noi, Vietnam
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17
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Abstract
The phytochemical investigation of the EtOAc-soluble fraction of the aerial parts of Solanum procumbens Lour. has been carried out to obtain seven compounds, including a new 8,3'-neolignan named solacanin A (1). Their chemical structures were elucidated based on the spectroscopic data interpretation. All isolated compounds were tested for their α-glucosidase inhibitory activity. Compounds 1 and 3-6 showed inhibitory activity with IC50 values of 221.5, 18.9, 6.0, 104.1, and 219.7 µM, respectively.
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Affiliation(s)
- Nhan Trung 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
| | - Thuy Thanh Thi Tran
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Tho Huu Le
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Truong Nhat Van Do
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Mai Thanh Thi 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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18
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Nguyen NT, Nguyen HX, Le TH, Nguyen DH, Do TNV, Dang PH, Nguyen MTT. Two new derivatives of 8-prenyl-5,7-dihydroxycoumarin from the stems of Streblus ilicifolius (S.Vidal) Corn. Nat Prod Res 2021; 36:4967-4972. [PMID: 33939585 DOI: 10.1080/14786419.2021.1914611] [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] [Indexed: 01/05/2023]
Abstract
From the EtOAc-soluble extract of the stems of Streblus ilicifolius (Moraceae), two new secondary metabolites named strebluses A (1) and B (2) were isolated. Their chemical structures have been concluded based on the chemical derivatisation and the spectroscopic interpretation. All compounds have been tested for their tyrosinase inhibitory activity. They showed weaker inhibitory activity than that of kojic acid (IC50, 44.6 µM).
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Affiliation(s)
- Nhan Trung 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
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Tho Huu Le
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Du Huy Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Truong Nhat Van Do
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Mai Thanh Thi 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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19
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Dang PH, Le TH, Van Do TN, Nguyen HX, Nguyen MTT, Nguyen NT. Decumbic anhydride from the stem barks of Swintonia floribunda (Anacardiaceae). ACTA ACUST UNITED AC 2021; 76:49-53. [PMID: 32673284 DOI: 10.1515/znc-2020-0136] [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] [Received: 06/14/2020] [Accepted: 06/26/2020] [Indexed: 11/15/2022]
Abstract
From an EtOAc-soluble fraction of the stem barks of Swintonia floribunda (Anacardiaceae), decumbic anhydride (1) and four known compounds 2-5 were isolated. Their chemical structures were elucidated based on the spectroscopic data interpretation. The GIAO-DFT calculation of 13C NMR chemical shifts was carried out to clarify the structure of 1. The absolute configuration of 1 was assigned based on the Cotton effects in its ECD spectrum. Compound 1 showed potent tyrosinase inhibitory activity with an IC50 value of 52.2 μM.
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Affiliation(s)
- Phu Hoang Dang
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Tho Huu Le
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Truong Nhat Van Do
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Mai Thanh Thi 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
| | - Nhan Trung 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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20
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Abstract
From the EtOAc-soluble extract of the stems of Buchanania lucida, one new lignan, (+)-(8S,8'S)-5'-methoxy-4,4'-di-O-methylsecoisolariciresinol (1), together with five known compounds (2-6) were isolated. Their structures were elucidated on the basis of NMR spectroscopic interpretation. The absolute configuration of 1 was determined based on the Cotton effects in the ECD spectrum. In the tyrosinase inhibitory activity test, p-hydroxybenzoic acid (6) showed the strong effect, with an IC50 value of 9.35 µM.
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Affiliation(s)
- Nhan Trung 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
| | - Phu Hoang Dang
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Tho Huu Le
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Truong Nhat Van Do
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.,Vietnam National University, Ho Chi Minh City, Vietnam
| | - Mai Thanh Thi 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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21
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Nguyen NT, Liu M, Katayama H, Takemura T, Kasuga I. Association of the colistin resistance gene mcr-1 with faecal pollution in water environments in Hanoi, Vietnam. Lett Appl Microbiol 2020; 72:275-282. [PMID: 33099779 DOI: 10.1111/lam.13421] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 09/30/2020] [Accepted: 10/20/2020] [Indexed: 11/29/2022]
Abstract
Colistin is one of the antibiotics of last resort for human health. However, the dissemination of the plasmid-mediated colistin resistance gene mcr-1 is of great concern globally. In the One Health framework, the environment is an important component for managing antimicrobial resistance. However, little information is available concerning the prevalence of mcr-1 in water environments. We aimed to reveal the prevalence of mcr-1 in different water environments in Hanoi, Vietnam. Quantitative PCR was applied to detect mcr-1 in four urban drainages receiving untreated domestic wastewater, three rivers, five lakes and two groundwater samples. Urban drainages contained higher concentrations of mcr-1, suggesting that urban residents carry the gene. The class 1 integron-integrase gene was identified as a good surrogate of antibiotic resistance genes including mcr-1. A significant correlation was found between the levels of mcr-1 and the human-specific cross-assembly phage, which is an indicator of human faecal pollution. These results indicated that the primary source of mcr-1 in urban water environments is human faeces, which is consistent with the fact that most domestic wastewater is untreated in Hanoi. The control of untreated wastewater is critical for alleviating the spread of mcr-1 in water environments in Vietnam.
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Affiliation(s)
- N T Nguyen
- Vietnam Research Station, Center for Infectious Disease Research in Asia and Africa, Institute of Tropical Medicine, Nagasaki University, Hanoi, Vietnam.,Master's Program in Environmental Engineering, VNU Vietnam Japan University, Hanoi, Vietnam
| | - M Liu
- Department of Urban Engineering, School of Engineering, The University of Tokyo, Tokyo, Japan
| | - H Katayama
- Department of Urban Engineering, School of Engineering, The University of Tokyo, Tokyo, Japan
| | - T Takemura
- Vietnam Research Station, Center for Infectious Disease Research in Asia and Africa, Institute of Tropical Medicine, Nagasaki University, Hanoi, Vietnam
| | - I Kasuga
- Master's Program in Environmental Engineering, VNU Vietnam Japan University, Hanoi, Vietnam.,Department of Urban Engineering, School of Engineering, The University of Tokyo, Tokyo, Japan
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22
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Nguyen MTT, Nguyen HX, Le TH, Do TNV, Dang PH, Pham TV, Giang TTM, Sun S, Kim MJ, Tawila AM, Omar AM, Awale S, Nguyen NT. A new flavanone derivative from the rhizomes of Boesenbergia pandurata. Nat Prod Res 2020; 36:1959-1965. [DOI: 10.1080/14786419.2020.1837822] [Citation(s) in RCA: 2] [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: 01/22/2023]
Affiliation(s)
- Mai Thanh Thi 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
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Tho Huu Le
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Truong Nhat Van Do
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Tung Van Pham
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Truc Thanh Minh Giang
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Sijia Sun
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, Toyama, Japan
| | - Min Jo Kim
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, Toyama, Japan
| | - Ahmed M. Tawila
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, Toyama, Japan
| | - Ashraf M. Omar
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, Toyama, Japan
| | - Suresh Awale
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, Toyama, Japan
| | - Nhan Trung 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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23
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Vo NT, Sasaki S, Miyake Y, Nguyen NT, Dang PH, Thi Nguyen MT, Kataoka T. α-Conidendrin inhibits the expression of intercellular adhesion molecule-1 induced by tumor necrosis factor-α in human lung adenocarcinoma A549 cells. Eur J Pharmacol 2020; 890:173651. [PMID: 33049301 DOI: 10.1016/j.ejphar.2020.173651] [Citation(s) in RCA: 3] [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] [Received: 06/04/2020] [Revised: 09/29/2020] [Accepted: 10/09/2020] [Indexed: 12/30/2022]
Abstract
α-Conidendrin is a lignan isolated from Taxus wallichiana and other species. In the present study, we demonstrated that α-conidendrin inhibited the cell-surface expression of intercellular adhesion molecule-1 (ICAM-1) induced by tumor necrosis factor-α (TNF-α) at an IC50 value of 40-60 μM in human lung adenocarcinoma A549 cells. α-Conidendrin decreased ICAM-1 protein and mRNA expression levels at concentrations of 40-100 μM in TNF-α-stimulated A549 cells. The TNF-α-induced mRNA expression of vascular cell adhesion molecule-1, E-selectin, and cyclooxygenase-2 was also reduced by α-conidendrin. In the TNF-α-induced nuclear factor κB (NF-κB) signaling pathway, α-conidendrin did not influence the translocation of the NF-κB subunit RelA from the cytoplasm to the nucleus at concentrations up to 100 μM. A chromatin immunoprecipitation assay revealed that α-conidendrin at 100 μM reduced the binding of RelA to the ICAM-1 promoter in response to a stimulation with TNF-α. Collectively, these results indicated that α-conidendrin interfered with the DNA binding of RelA to the ICAM-1 promoter, thereby reducing ICAM-1 transcription.
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Affiliation(s)
- Nghia Trong Vo
- Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
| | - Saki Sasaki
- Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
| | - Yasunobu Miyake
- Division of Molecular and Cellular Immunoscience, Department of Biomolecular Sciences, Faculty of Medicine, Saga University, Saga, 849-8501, Japan
| | - Nhan Trung 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, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam
| | - Phu Hoang Dang
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Viet Nam; Vietnam National University, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam
| | - Mai Thanh Thi 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, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam
| | - Takao Kataoka
- Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan; The Center for Advanced Insect Research Promotion (CAIRP), Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan.
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Nguyen MTT, Dang PH, Nguyen HX, Le TH, Van Do TN, Pham PV, Nguyen ST, Nguyen NT. Paratrimerin I, cytotoxic acridone alkaloid from the roots of Paramignya trimera. Nat Prod Res 2020; 35:5042-5047. [DOI: 10.1080/14786419.2020.1774760] [Citation(s) in RCA: 2] [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: 01/02/2023]
Affiliation(s)
- Mai Thanh Thi Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Viet Nam
- Cancer Research Laboratory, University of Science, Ho Chi Minh City, Viet Nam
- Vietnam National University, Ho Chi Minh City, Viet Nam
| | - Phu Hoang Dang
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Viet Nam
- Vietnam National University, Ho Chi Minh City, Viet Nam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Viet Nam
- Vietnam National University, Ho Chi Minh City, Viet Nam
| | - Tho Huu Le
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Viet Nam
- Vietnam National University, Ho Chi Minh City, Viet Nam
| | - Truong Nhat Van Do
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Viet Nam
- Vietnam National University, Ho Chi Minh City, Viet Nam
| | - Phuc Van Pham
- Stem Cell Institute, University of Science, Ho Chi Minh City, Viet Nam
- Vietnam National University, Ho Chi Minh City, Viet Nam
| | - Sinh Truong Nguyen
- Stem Cell Institute, University of Science, Ho Chi Minh City, Viet Nam
- Vietnam National University, Ho Chi Minh City, Viet Nam
| | - Nhan Trung Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Viet Nam
- Cancer Research Laboratory, University of Science, Ho Chi Minh City, Viet Nam
- Vietnam National University, Ho Chi Minh City, Viet Nam
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25
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Affiliation(s)
- Tho Huu Le
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Truong Nhat Van Do
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam
- Vietnam National University, Ho Chi Minh City, Vietnam
| | - Nhan Trung 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
| | - Mai Thanh Thi 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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26
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Nguyen NT, Hirata M, Tanihara F, Sato Y, Namula Z, Le QA, Wittayarat M, Fahrudin M, Otti T. In vitro Development of Zona Pellucida-free Porcine Zygotes Cultured Individually after Vitrification. Cryo Letters 2020; 41:86-91. [PMID: 33988658] [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: 06/12/2023]
Abstract
BACKGROUND Cryopreservation of zona pellucida (ZP)-free embryos provides more options for somatic cell nuclear transfer, particularly during handmade cloning. OBJECTIVE This study investigated whether the removal of the ZP affects the development of porcine zygotes after vitrification and warming. MATERIALS AND METHODS We determined the appropriate volume of the corresponding medium for the individual culture of ZP-intact and -free embryos and evaluated the protection effect of ZP during cryopreservation on the resulting development of the vitrified-warmed zygotes. RESULTS The volume of culture medium influenced the development of ZP-intact zygotes, and a volume of 15 µL was most suitable for their development. However, the volume of culture medium did not modify the development of ZP-free zygotes. The removal of the ZP before vitrification did not adversely affect embryonic development or quality of the resulting blastocysts. CONCLUSION Our results suggest that the removal of the ZP does not cause detrimental effects to the development of vitrified-warmed zygotes.
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Affiliation(s)
| | - M Hirata
- Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan.
| | - F Tanihara
- Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan
| | - Y Sato
- School of Biological Science, Tokai University, Sapporo, Japan
| | - Z Namula
- Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan; College of Agricultural Science, Guangdong Ocean University, Guangdong, China
| | - Q A Le
- Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan
| | - M Wittayarat
- Faculty of Veterinary Science, Prince of Songkla University, Songkhla, Thailand
| | - M Fahrudin
- Faculty of Veterinary Science, Bogor Agricultural University, Indonesia
| | - T Otti
- Faculty of Bioscience and Bioindustry, Tokushima University, Tokushima, Japan
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de Wijs LEM, Nguyen NT, Kunkeler ACM, Nijsten T, Damman J, Hijnen DJ. Clinical and histopathological characterization of paradoxical head and neck erythema in patients with atopic dermatitis treated with dupilumab: a case series. Br J Dermatol 2019; 183:745-749. [PMID: 31749159 PMCID: PMC7586932 DOI: 10.1111/bjd.18730] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [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] [Accepted: 11/18/2019] [Indexed: 12/29/2022]
Abstract
Dupilumab is the first biologic registered for the treatment of atopic dermatitis (AD). We report on seven patients with AD presenting with a paradoxical head and neck erythema that appeared 10-39 weeks after the start of dupilumab treatment. The patients presented with a relatively sharply demarcated, patchy erythema in the head and neck area that showed no or less scaling compared with their usual eczema. Only one patient experienced symptoms of itch and burning, although this was notably different from his pre-existent facial AD. Except for a notable 'red face', eczema on other body parts had greatly improved in six of the seven patients, with a mean numerical rating scale for treatment satisfaction of 9 out of 10 at the time of biopsy. Treatment of the erythema with topical and systemic drugs was unsuccessful. Despite the presence of this erythema, none of our patients discontinued dupilumab treatment. Lesional skin biopsies showed an increased number of ectatic capillaries, and a perivascular lymphohistiocytic infiltration in all patients. In addition, epidermal hyperplasia with elongation of the rete ridges was observed in four patients, resembling a psoriasiform dermatitis. Additional immunohistochemical stainings revealed increased numbers of plasma cells, histiocytes and T lymphocytes. Interestingly, spongiosis was largely absent in all biopsies. We report on patients with AD treated with dupilumab developing a paradoxical erythema in a head and neck distribution. Both clinically and histopathologically we found a heterogeneous response, which was most suggestive of a drug-induced skin reaction.
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Affiliation(s)
- L E M de Wijs
- Department of Dermatology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - N T Nguyen
- Department of Dermatology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - A C M Kunkeler
- Department of Dermatology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - T Nijsten
- Department of Dermatology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - J Damman
- Department of Pathology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - D J Hijnen
- Department of Dermatology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
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Abstract
From the methanol extract of the wood of Mangifera gedebe (Anacardiaceae), we had isolated a new secondary metabolite named gedebic acid (1) and six known compounds (2-7). Their chemical structures were determined by spectroscopic methods as well as comparing with data in the literature. All compounds were tested for α-glucosidase inhibitory activity. Compounds 4-7 showed more potent inhibitory activity, with IC50 values ranging from 45.3 to 142.6 μM, than that of a positive control acarbose (IC50, 214.5 μM).
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Affiliation(s)
- Hai Xuan Nguyen
- Faculty of Chemistry, VNUHCM-University of Science, Hochiminh City, Vietnam
| | - Loc Thanh Nguyen
- Faculty of Chemistry, VNUHCM-University of Science, Hochiminh City, Vietnam
| | - Truong Nhat Van Do
- Faculty of Chemistry, VNUHCM-University of Science, Hochiminh City, Vietnam
| | - Tho Huu Le
- Faculty of Chemistry, VNUHCM-University of Science, Hochiminh City, Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, VNUHCM-University of Science, Hochiminh City, Vietnam
| | - Hung Manh Tran
- Faculty of Chemistry, VNUHCM-University of Science, Hochiminh City, Vietnam
| | - Nhan Trung Nguyen
- Faculty of Chemistry, VNUHCM-University of Science, Hochiminh City, Vietnam.,Cancer Research Laboratory, VNUHCM-University of Science, Hochiminh City, Vietnam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, VNUHCM-University of Science, Hochiminh City, Vietnam.,Cancer Research Laboratory, VNUHCM-University of Science, Hochiminh City, Vietnam
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Velazquez AI, Nguyen NT, Rodriguez-Bonilla C, Shao T. Abstract P5-15-03: Imaging is not indicated in staging of asymptomatic patients with early breast cancer – Are we following current recommendations? Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p5-15-03] [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: 11/16/2022]
Abstract
Abstract
Breast cancer is the most common malignancy in women with estimated care costs of $20.50 billion/year by 2020. In 2012, ASCO released the Choosing Wisely Initiative which recommended against the use of routine staging imaging in patients with newly diagnosed early stage breast cancer. We examined physician's adherence rate and factors associated with non-adherence to current guidelines in patients with early stage breast cencer treated within a large urban health care system.
We identified all women with stage I-II breast cancer diagnosed between January 1, 2014 and December 31, 2015 from the Cancer Registry of the Mount Sinai Health System. Patients with history of prior malignancy or symptom-triggered imaging were excluded. Demographic, clinical and treatment related factors were collected. Medical records were reviewed to identify patients who had routine staging scans. Data of initial and follow-up imaging over 1-year period were collected. Odds ratios (ORs) and 95% confidence intervals (CIs) were estimated from logistic regression models.
Among 917 breast cancer patients, the median age at diagnosis was 59 years (range 26-98). One hundred seventy one patients (18.6%) had routine staging imaging with a mean number of initial scans of 1.48. Eighty-two patients (48%) had at least 1 subsequent scan in the 1-year follow up (range 1-4 scans/year). PET/CT was the most frequent modality (49%), followed by CT scan (33%). The medical oncologist was the ordering provider in 50.3% of the cases and surgical oncologist in 43.2%. Routine staging scans identified no cases of metastatic disease. False-positive findings were identified in 49.7% and incidental findings in 9.3% of cases. Total cost of imaging in this group was $3990/patient. Young age (<50 years old), tumor size >2cm, positive lymph nodes, and triple negative disease were associated with presence of routine staging scans on univariate and multivariate analysis (Table 1).
Our study highlights the prevalence of unnecessary staging scans in up to 18.6% of patients with early stage I-II breast cancer. Routine imaging resulted in increased radiation exposure, multiple subsequent imaging, and increased economical burden particularly for those of young age, T2 tumors, positive lymph nodes, and triple negative disease. Further educational efforts are needed to avoid unnecessary scans in patients with early stage breast cancer and improve high-value practices among medical and surgical oncologists.
Factors associated with routine staging scans in early breast cancer OR95% CIp-value Univariate Analysis: Age < 501.691.17-2.420.005T2 tumors4.353.01-6.28<0.0001Positive lymph nodes5.073.43-7.51<0.0001Triple negative disease2.941.86-4.63<0.0001 Multivariate Analysis: Age < 501.571.03-2.390.037T2 tumors3.472.34 -5.17<0.0001Positive lymph nodes4.042.64-6.18<0.0001Triple negative disease2.991.76-5.05<0.0001
Citation Format: Velazquez AI, Nguyen NT, Rodriguez-Bonilla C, Shao T. Imaging is not indicated in staging of asymptomatic patients with early breast cancer – Are we following current recommendations? [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P5-15-03.
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Affiliation(s)
- AI Velazquez
- Icahn School of Medicine at Mount Sinai Beth Israel, New York, NY
| | - NT Nguyen
- Icahn School of Medicine at Mount Sinai Beth Israel, New York, NY
| | | | - T Shao
- Icahn School of Medicine at Mount Sinai Beth Israel, New York, NY
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Tanigaki R, Takahashi R, Nguyen MTT, Nguyen NT, Do TVN, Nguyen HX, Kataoka T. 4-Hydroxypanduratin A and Isopanduratin A Inhibit Tumor Necrosis Factor α-Stimulated Gene Expression and the Nuclear Factor κB-Dependent Signaling Pathway in Human Lung Adenocarcinoma A549 Cells. Biol Pharm Bull 2019; 42:26-33. [DOI: 10.1248/bpb.b18-00457] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Riho Tanigaki
- Department of Applied Biology, Kyoto Institute of Technology
| | - Riku Takahashi
- Department of Applied Biology, Kyoto Institute of Technology
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University, Ho Chi Minh City
- Cancer Research Laboratory, Vietnam National University, Ho Chi Minh City
| | - Nhan Trung Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University, Ho Chi Minh City
| | - Truong Van Nhat Do
- Faculty of Chemistry, University of Science, Vietnam National University, Ho Chi Minh City
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University, Ho Chi Minh City
| | - Takao Kataoka
- Department of Applied Biology, Kyoto Institute of Technology
- Advanced Insect Research Promotion Center, Kyoto Institute of Technology
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Van Do TN, Nguyen HX, Le TH, Ngo TMT, Dang PH, Phung NH, Vo NT, Nguyen DM, Le NHT, Le TT, Nguyen MTT, Awale S, Nguyen NT. A New Compound from the Rhizomes of Boesenbergia pandurata. Nat Prod Commun 2018. [DOI: 10.1177/1934578x1801300622] [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: 11/15/2022] Open
Abstract
Phytochemical investigation of the methanol extract of the rhizomes of Vietnamese Boesenbergia pandurata resulted in the isolation of a new secondary metabolite named panduratin P (1). The structure of this compound was elucidated by NMR spectroscopic analysis. Compound 1 exhibited a mild activity against PANC-1 human pancreatic cancer cell lines in nutrient-deprived medium (NDM) with PC50 value of 55.9 μM.
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Affiliation(s)
- Truong Nhat Van Do
- Faculty of Chemistry, VNUHCM-University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, VNUHCM-University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Tho Huu Le
- Faculty of Chemistry, VNUHCM-University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Trang My Thi Ngo
- Faculty of Chemistry, VNUHCM-University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, VNUHCM-University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Nghia Hieu Phung
- Faculty of Chemistry, VNUHCM-University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Nghia Trong Vo
- Faculty of Chemistry, VNUHCM-University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Duc Minh Nguyen
- Faculty of Chemical Engineering, VNUHCMA-University of Technology, 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
| | - Nhan Hong Thi Le
- Faculty of Chemical Engineering, VNUHCMA-University of Technology, 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Vietnam
| | - Thanh Thanh Le
- Faculty of Natural Sciences, Thu Dau Mot University, 06 Tran Van On, Phu Hoa, Thu Dau Mot City, Binh Duong Province, Vietnam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, VNUHCM-University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
- Cancer Research Laboratory, VNUHCM-University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Suresh Awale
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Nhan Trung Nguyen
- Faculty of Chemistry, VNUHCM-University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
- Cancer Research Laboratory, VNUHCM-University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
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Can MV, Tran AH, Pham DM, Dinh BQ, Le QV, Nguyen BV, Nguyen MTT, Nguyen HX, Nguyen NT, Nishijo H. Willughbeia cochinchinensis prevents scopolamine-induced deficits in memory, spatial learning, and object recognition in rodents. J Ethnopharmacol 2018; 214:99-105. [PMID: 28652013 DOI: 10.1016/j.jep.2017.06.035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 10/11/2016] [Revised: 06/19/2017] [Accepted: 06/20/2017] [Indexed: 06/07/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Willughbeia cochinchinensis (WC) has been used in Vietnamese traditional medicine for the treatment of dementia as well as diarrhea, heartburn, and cutaneous abscess and as a diuretic. AIM Alzheimer's disease (AD) is one of the most prevalent diseases in elderly individuals. Acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitors have been widely used to treat patients with AD. In the present study, we investigated anti-AChE and anti-BChE activities of a natural product, WC, for its potential applications in therapies to prevent/treat dementia. MATERIALS AND METHODS First, compounds extracted from WC were tested for their AChE and BChE inhibitory activities in vitro. Second, in vivo behavioral experiments were performed to investigate the effects of WC at doses of 100, 150, and 200mg/kg on scopolamine (1.5mg/kg)-induced memory and cognitive deficits in mice. The behavior of mice treated with and without WC and/or scopolamine was tested using the Y-maze, Morris water maze, and novel object recognition task. RESULTS The results of the in vitro assay demonstrated anti-AChE and anti-BChE activities of the compounds extracted from WC. The results of behavioral experiments showed that the administration of WC prevented 1) scopolamine-induced decrease in spontaneous alternation (%) behavior in the Y-maze, 2) scopolamine-induced deficits in spatial learning and memory in the Morris water maze, and 3) scopolamine-induced deficits in novel object recognition. These results indicate that WC prevents cognitive and memory deficits induced by scopolamine injection. CONCLUSIONS Our findings suggest that WC may represent a novel candidate for the treatment of memory and cognitive deficits in humans with dementia.
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Affiliation(s)
- Mao Van Can
- Department of Physiology, Vietnam Military Medical University, Vietnam.
| | - Anh Hai Tran
- Department of Physiology, Vietnam Military Medical University, Vietnam.
| | - Dam Minh Pham
- Department of Physiology, Vietnam Military Medical University, Vietnam.
| | - Bao Quoc Dinh
- Department of Physiology, Vietnam Military Medical University, Vietnam.
| | - Quan Van Le
- Department of Physiology, Vietnam Military Medical University, Vietnam.
| | - Ba Van Nguyen
- Department of Physiology, Vietnam Military Medical University, Vietnam.
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University Hochiminh City, Vietnam.
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University Hochiminh City, Vietnam.
| | - Nhan Trung Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University Hochiminh City, Vietnam.
| | - Hisao Nishijo
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Japan.
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Nguyen HX, Van Do TN, Nguyen MTT, Dang PH, Tho LH, Awale S, Nguyen NT. A New Alkenylphenol from the Propolis of Stingless Bee Trigona minor. Nat Prod Commun 2018. [DOI: 10.1177/1934578x1801300121] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A new alkenylphenol, 2-hydroxyl-6-(14' Z -nonadecenyl)benzoic acid (1), was isolated from the ethanolic extract of Vietnamese stingless bee propolis Trigona minor (Meliponini, Apidae), together with two known compounds (2 and 3). Their chemical structures were determined by extensive NMR spectroscopic analysis. All compounds were tested for preferential cytotoxicity against the PANC-1 human pancreatic cell line under nutrition-deprived conditions (NDM). Compound 1 exhibited the strongest preferential cytotoxicity, with a PC50 value of 2.4 μM.
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Affiliation(s)
- Hai Xuan Nguyen
- Faculty of Chemistry, VNUHCM–University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City Vietnam
| | - Truong Nhat Van Do
- Faculty of Chemistry, VNUHCM–University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City Vietnam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, VNUHCM–University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City Vietnam
- Cancer Research Laboratory, VNUHCM–University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, VNUHCM–University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City Vietnam
| | - Le Huu Tho
- Faculty of Chemistry, VNUHCM–University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City Vietnam
| | - Suresh Awale
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Nhan Trung Nguyen
- Faculty of Chemistry, VNUHCM–University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City Vietnam
- Cancer Research Laboratory, VNUHCM–University of Science, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
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Van Nguyen D, Vidal C, Chi HC, NTQ D, Nguyen NN, HTT N, Nguyen NT, TTL T, Fulton R, Li J, Fernando SL. P72: GENE PROFILING STUDIES DEMONSTRATE THE ROLE OF INNATE IMMUNE RESPONSES IN ALLOPURINOL-INDUCED SEVERE CUTANEOUS ADVERSE REACTIONS. Intern Med J 2017. [DOI: 10.1111/imj.72_13578] [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: 11/28/2022]
Affiliation(s)
- D Van Nguyen
- Sydney Medical School-Northern; University of Sydney; Sydney Australia
- ImmunoRheumatology Laboratory; New South Wales Sydney Australia
- Department of Allergy and Clinical Immunology; Hanoi Medical University; Hanoi Vietnam
| | - C Vidal
- ImmunoRheumatology Laboratory; New South Wales Sydney Australia
| | - HC Chi
- Centre of Allergology and Clinical Immunology, Bach Mai Hospital; Hanoi Vietnam
| | - Do NTQ
- Department of Immunology and Molecular Biology, National Institute of Hygiene and Epidemiology; Hanoi Vietnam
| | - NN Nguyen
- Centre of Allergology and Clinical Immunology, Bach Mai Hospital; Hanoi Vietnam
| | - Nguyen HTT
- Department of Allergy and Clinical Immunology; Hanoi Medical University; Hanoi Vietnam
| | | | - Tran TTL
- Hanoi Heart Hospital; Hanoi Vietnam
| | - R Fulton
- ImmunoRheumatology Laboratory; New South Wales Sydney Australia
| | - J Li
- ImmunoRheumatology Laboratory; New South Wales Sydney Australia
| | - SL Fernando
- Sydney Medical School-Northern; University of Sydney; Sydney Australia
- ImmunoRheumatology Laboratory; New South Wales Sydney Australia
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Le TH, Nguyen HX, Do TVN, Dang PH, Nguyen NT, Nguyen MTT. Moracin VN, A New Tyrosinase and Xanthine Oxidase Inhibitor from the Woods of Artocarpus heterophyllus. Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701200623] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Bioactivity-guided fractionation of the woods extract of Artocarpus heterophyllus collected in Vietnam revealed that a new 2-arylbenzofuran, moracin VN (1) together with two known compounds were isolated. Compound 1 possessed the inhibitory activity on tyrosinase with IC50 value of 0.82 μM, more potent than the positive control kojic acid (IC50, 44.6 μM). Compound 1 also showed moderate inhibitory activity on xanthine oxidase with IC50 value of 22.8 μM. The kinetic study of tyrosinase was performed on moracin VN (1) showed non-competitive inhibition with Ki value of 2.40 μM.
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Affiliation(s)
- Tho Huu Le
- Faculty of Chemistry, VNUHCM–University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, VNUHCM–University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Truong Van Nhat Do
- Faculty of Chemistry, VNUHCM–University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, VNUHCM–University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Nhan Trung Nguyen
- Faculty of Chemistry, VNUHCM–University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
- Cancer Research Laboratory, VNUHCM–University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, VNUHCM–University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
- Cancer Research Laboratory, VNUHCM–University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
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Dang PH, Nguyen HX, Duong TTT, Tran TKT, Nguyen PT, Vu TKT, Vuong HC, Phan NHT, Nguyen MTT, Nguyen NT, Awale S. α-Glucosidase Inhibitory and Cytotoxic Taxane Diterpenoids from the Stem Bark of Taxus wallichiana. J Nat Prod 2017; 80:1087-1095. [PMID: 28240909 DOI: 10.1021/acs.jnatprod.7b00006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
From a CH2Cl2 extract of the bark of Taxus wallichiana, six new taxoids, wallitaxanes A-F (1-6), were isolated, together with 29 known compounds. The structures of the new compounds were elucidated on the basis of spectroscopic data interpretation. Wallitaxane D (4) was identified as an opened oxetane-type taxoid having the first naturally occurring C(H)-20 acetal group, while wallitaxanes E (5) and F (6) are representative of the rare abeo-taxoid class. The isolated compounds were evaluated for their α-glucosidase inhibitory activity and for cytotoxicity against the HeLa human cervical cancer cell line. In the present work, taxanes were found to exhibit α-glucosidase inhibitory activity for the first time, and wallitaxane A (1) showed the most potent effect, with an IC50 value of 3.6 μM. In turn, 7-epi-taxol (16) and 7-epi-10-deacetyltaxol (17) showed IC50 values of 0.05 and 0.085 nM, respectively, against HeLa cells.
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Affiliation(s)
- Phu Hoang Dang
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Truc Thanh Thi Duong
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Thao Kim Thi Tran
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Phuc Thi Nguyen
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Trang Kieu Thi Vu
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Hung Chi Vuong
- Tay Nguyen Herbals JSC , Tu Tra Ward, Don Duong District, Lam Dong Province Vietnam
| | - Nguyen Huu Trong Phan
- Faculty of Chemistry, VNUHCM-University of Science , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Mai Thanh Thi 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 Trung 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
| | - Suresh Awale
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama , 2630 Sugitani, Toyama 930-0194, Japan
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Nguyen NT, Nguyen MTT, Nguyen HX, Dang PH, Dibwe DF, Esumi H, Awale S. Constituents of the Rhizomes of Boesenbergia pandurata and Their Antiausterity Activities against the PANC-1 Human Pancreatic Cancer Line. J Nat Prod 2017; 80:141-148. [PMID: 28099006 DOI: 10.1021/acs.jnatprod.6b00784] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Human pancreatic cancer cell lines have a remarkable tolerance to nutrition starvation, which enables them to survive under a tumor microenvironment. The search for agents that preferentially inhibit the survival of cancer cells under low nutrient conditions represents a novel antiausterity strategy in anticancer drug discovery. In this investigation, a methanol extract of the rhizomes of Boesenbergia pandurata showed potent preferential cytotoxicity against PANC-1 human pancreatic cancer cells under nutrient-deprived conditions, with a PC50 value of 6.6 μg/mL. Phytochemical investigation of this extract led to the isolation of 15 compounds, including eight new cyclohexene chalcones (1-8). The structures of the new compounds were elucidated by NMR spectroscopic data analysis. Among the isolated compounds obtained, isopanduratin A1 (14) and nicolaioidesin C (15) exhibited potent preferential cytotoxicity against PANC-1 human pancreatic cancer cells under nutrition-deprived conditions, with PC50 values of 1.0 and 0.84 μM, respectively.
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Affiliation(s)
- Nhan Trung Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University, Ho Chi Minh City , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University, Ho Chi Minh City , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University, Ho Chi Minh City , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, University of Science, Vietnam National University, Ho Chi Minh City , 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Dya Fita Dibwe
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama , 2630 Sugitani, Toyama 930-0194, Japan
| | - Hiroyasu Esumi
- Research Institute for Biomedical Sciences, Tokyo University of Science , Chiba 278-8510, Japan
| | - Suresh Awale
- Division of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama , 2630 Sugitani, Toyama 930-0194, Japan
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Bui TH, Nguyen NT, Dang PH, Nguyen HX, Nguyen MTT. Design and synthesis of chalcone derivatives as potential non-purine xanthine oxidase inhibitors. Springerplus 2016; 5:1789. [PMID: 27795931 PMCID: PMC5063830 DOI: 10.1186/s40064-016-3485-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 10/06/2016] [Indexed: 11/16/2022]
Abstract
Background Based on some previous research, the chalcone derivatives exhibited potent xanthine oxidase inhibitory activity, e.g. sappanchalcone (7), with IC50 value of 3.9 μM, was isolated from Caesalpinia sappan. Therefore, objectives of this research are design and synthesis of 7 and other chalcone derivatives by Claisen–Schmidt condensation and then evaluate their XO inhibitory activity. Results Fifteen chalcone derivatives were synthesized by Claisen–Schmidt condensation, and were evaluated for XO inhibitory activity. Nine out of 15 synthetic chalcones showed inhibitory activity (3; 5–8; 10–13). Sappanchalcone derivatives (11) (IC50, 2.5 μM) and a novel chalcone (13) (IC50, 2.4 μM) displayed strong xanthine oxidase inhibitory activity that is comparable to allopurinol (IC50, 2.5 μM). The structure–activity relationship of these chalcone derivatives was also presented. Conclusions It is the first research on synthesis sappanchalcone (7) by Claisen–Schmidt condensation. The overall yield of this procedure was 6.6 %, higher than that of reported procedure (4 %). Design, synthesis, and evaluation of chalcone derivatives were carried out. This result suggests that the chalcone derivative can be used as potential non-purine XO inhibitors.The chalcone derivatives as potential non-purine xanthine oxidase inhibitors ![]() Electronic supplementary material The online version of this article (doi:10.1186/s40064-016-3485-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Trung Huu Bui
- Faculty of Chemistry, University of Science, Vietnam National University, 227 Nguyen Van Cu, District 5, Ho Chi Minh City, Vietnam
| | - Nhan Trung Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University, 227 Nguyen Van Cu, District 5, Ho Chi Minh City, Vietnam ; Cancer Research Laboratory, Vietnam National University, 227 Nguyen Van Cu, District 5, Ho Chi Minh City, Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, University of Science, Vietnam National University, 227 Nguyen Van Cu, District 5, Ho Chi Minh City, Vietnam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University, 227 Nguyen Van Cu, District 5, Ho Chi Minh City, Vietnam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University, 227 Nguyen Van Cu, District 5, Ho Chi Minh City, Vietnam ; Cancer Research Laboratory, Vietnam National University, 227 Nguyen Van Cu, District 5, Ho Chi Minh City, Vietnam
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Nguyen HX, Do TNV, Le TH, Nguyen MTT, Nguyen NT, Esumi H, Awale S. Chemical Constituents of Mangifera indica and Their Antiausterity Activity against the PANC-1 Human Pancreatic Cancer Cell Line. J Nat Prod 2016; 79:2053-2059. [PMID: 27466882 DOI: 10.1021/acs.jnatprod.6b00381] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Human pancreatic cancer cell lines such as PANC-1 have an altered metabolism, enabiling them to tolerate and survive under extreme conditions of nutrient starvation. The search for candidates that inhibit their viability during nutrition starvation represents a novel antiausterity strategy in anticancer drug discovery. A methanol extract of the bark of Mangifera indica was found to inhibit the survival of PANC-1 human pancreatic cancer cells preferentially under nutrient-deprived conditions with a PC50 value of 15.5 μg/mL, without apparent toxicity, in normal nutrient-rich conditions. Chemical investigation on this bioactive extract led to the isolation of 19 compounds (1-19), including two new cycloartane-type triterpenes, mangiferolate A (1) and mangiferolate B (2). The structures of 1 and 2 were determined by NMR spectroscopic analysis. Among the isolated compounds, mangiferolate B (2) and isoambolic acid (12) exhibited potent preferential cytotoxicity against PANC-1 human pancreatic cancer cells under the nutrition-deprived condition with PC50 values of 11.0 and 4.8 μM, respectively.
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Affiliation(s)
- Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University-Hochiminh City , 227 Nguyen Van Cu Street, District 5, Vietnam
| | - Truong Nhat Van Do
- Faculty of Chemistry, University of Science, Vietnam National University-Hochiminh City , 227 Nguyen Van Cu Street, District 5, Vietnam
| | - Tho Huu Le
- Faculty of Chemistry, University of Science, Vietnam National University-Hochiminh City , 227 Nguyen Van Cu Street, District 5, Vietnam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University-Hochiminh City , 227 Nguyen Van Cu Street, District 5, Vietnam
| | - Nhan Trung Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University-Hochiminh City , 227 Nguyen Van Cu Street, District 5, Vietnam
| | - Hiroyasu Esumi
- Research Institute for Biomedical Sciences, Tokyo University of Science , Chiba 278-8510, Japan
| | - Suresh Awale
- Division of Natural Drug Discovery, Department of Translational Research, Institute of Natural Medicine, University of Toyama , 2630 Sugitani, Toyama 930-0194, Japan
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Lam LMT, Nguyen MTT, Nguyen HX, Dang PH, Nguyen NT, Tran HM, Nguyen HT, Nguyen NM, Min BS, Kim JA, Choi JS, Van Can M. Anti-cholinesterases and memory improving effects of Vietnamese Xylia xylocarpa. Chem Cent J 2016; 10:48. [PMID: 27493681 PMCID: PMC4973094 DOI: 10.1186/s13065-016-0197-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 07/28/2016] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Alzheimer's disease (AD) is the most common cause of dementia among the elderly and is characterized by loss of memory and other cognitive functions. An increase in AChE (a key enzyme in the cholinergic nervous system) levels around β-amyloid plaques and neurofibrillary tangles is a common feature of AD neuropathology. Amnesic effects of scopolamine (acetylcholine receptor antagonist) can be investigated in various behavioral tests such as Morris water maze, object recognition, Y-maze, and passive avoidance. In the scope of this paper, we report the anti-AChE, anti-BChE properties of the isolated compound and the in vivo effects of the methanolic extract of Xylia xylocarpa (MEXX) on scopolamine-induced memory deficit. RESULTS In further phytochemistry study, a new hopan-type triterpenoid, (3β)-hopan-3-ol-28,22-olide (1), together with twenty known compounds were isolated (2-21). Compound 1, 2, 4, 5, 7-9, and 11-13 exhibited potent acetylcholinesterase (AChE) inhibitory activity in a concentration-dependent manner with IC50 values ranging from 54.4 to 94.6 μM. Compound 13 was also shown anti-butyrylcholinesterase (BChE) activity with an IC50 value of 42.7 μM. The Morris water Y-maze, Y-maze, and object recognition test were also carried out. CONCLUSIONS It is noteworthy that MEXX is effective when administered orally to mice, experimental results are consistent with the traditional use of this medicinal plant species.
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Affiliation(s)
- Linh My Thi Lam
- Faculty of Chemistry, University of Science, Vietnam National University-Hochiminh City, 227 Nguyen Van Cu, District 5, Hochiminh City, Vietnam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University-Hochiminh City, 227 Nguyen Van Cu, District 5, Hochiminh City, Vietnam
- Cancer Research Laboratory, Vietnam National University-Hochiminh City, Hochiminh City, Vietnam
| | - Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University-Hochiminh City, 227 Nguyen Van Cu, District 5, Hochiminh City, Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, University of Science, Vietnam National University-Hochiminh City, 227 Nguyen Van Cu, District 5, Hochiminh City, Vietnam
| | - Nhan Trung Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University-Hochiminh City, 227 Nguyen Van Cu, District 5, Hochiminh City, Vietnam
| | - Hung Manh Tran
- Faculty of Chemistry, University of Science, Vietnam National University-Hochiminh City, 227 Nguyen Van Cu, District 5, Hochiminh City, Vietnam
| | - Hoa Thi Nguyen
- Vietnam Military Medical University, Hadong District, Hanoi, Vietnam
| | - Nui Minh Nguyen
- Vietnam Military Medical University, Hadong District, Hanoi, Vietnam
| | - Byung Sun Min
- College of Pharmacy, Catholic University of Daegu, Gyeongsan, Gyeongsangbuk 712-702 Republic of Korea
| | - Jeong Ah Kim
- College of Pharmacy, Research Institute of Pharmaceutical Sciences, Kyungpook National University, Daegu, 702-701 Republic of Korea
| | - Jae Sue Choi
- Department of Food Science and Nutrition, Pukyong National University, Busan, 608-737 Republic of Korea
| | - Mao Van Can
- Vietnam Military Medical University, Hadong District, Hanoi, Vietnam
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Nguyen HX, Le TC, Do TNV, Le TH, Nguyen NT, Nguyen MTT. α-Glucosidase inhibitors from the bark of Mangifera mekongensis. Chem Cent J 2016; 10:45. [PMID: 27446235 PMCID: PMC4955201 DOI: 10.1186/s13065-016-0193-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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: 04/19/2016] [Accepted: 07/14/2016] [Indexed: 11/25/2022] Open
Abstract
Background Mangifera mekongensis (Anacardiaceae) is cultivated for its edible fruit and has been used in traditional Vietnamese medicine for its anti-aging properties and for treating diabetes, vermifuge, and dysentery. As part of a search for biologically active compounds with reduction of the rate of glucose absorption, a screening has been initiated to evaluate natural product extracts for the inhibition of enzyme α-glucosidase. A n-hexane extract of the bark of M. mekongensis showed strong α-glucosidase inhibitory activity with IC50 value of 1.71 µg/mL. Thus, the constituents of this plant were examined. Results Two new steroids named mekongsterol A (1) and mekongsterol B (2), were isolated from the n-hexane extract of the bark of M. mekongensis (Anacardiaceae), together with seven known compounds (3–9). Their chemical structures were elucidated on the basis of spectroscopic data. All compounds possessed significant α-glucosidase inhibitory activity in a concentration-dependent manner, except for 3 and 4. Compounds 1, 2, 5–9 showed more potent inhibitory activity, with IC50 values ranging from 1.2 to 112.0 µM, than that of a positive control acarbose (IC50, 214.5 µM). Conclusions These results suggested that the traditional use of the bark of M. mekongensis for the treatment of diabetes diseases in Vietnam may be attributable to the α-glucosidase inhibitory activity of its steroid and cycloartane constituents. Electronic supplementary material The online version of this article (doi:10.1186/s13065-016-0193-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University Hochiminh City, 227 Nguyen Van Cu, District 5, Hochiminh City, Vietnam ; Cancer Research Laboratory, Vietnam National University Hochiminh City, 227 Nguyen Van Cu, District 5, Hochiminh City, Vietnam
| | - Tri Cong Le
- Faculty of Chemistry, University of Science, Vietnam National University Hochiminh City, 227 Nguyen Van Cu, District 5, Hochiminh City, Vietnam
| | - Truong Nhat Van Do
- Faculty of Chemistry, University of Science, Vietnam National University Hochiminh City, 227 Nguyen Van Cu, District 5, Hochiminh City, Vietnam
| | - Tho Huu Le
- Faculty of Chemistry, University of Science, Vietnam National University Hochiminh City, 227 Nguyen Van Cu, District 5, Hochiminh City, Vietnam
| | - Nhan Trung Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University Hochiminh City, 227 Nguyen Van Cu, District 5, Hochiminh City, Vietnam ; Cancer Research Laboratory, Vietnam National University Hochiminh City, 227 Nguyen Van Cu, District 5, Hochiminh City, Vietnam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University Hochiminh City, 227 Nguyen Van Cu, District 5, Hochiminh City, Vietnam ; Cancer Research Laboratory, Vietnam National University Hochiminh City, 227 Nguyen Van Cu, District 5, Hochiminh City, Vietnam
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Nguyen HV, Caruso D, Lebrun M, Nguyen NT, Trinh TT, Meile JC, Chu-Ky S, Sarter S. Antibacterial activity of Litsea cubeba (Lauraceae, May Chang) and its effects on the biological response of common carp Cyprinus carpio challenged with Aeromonas hydrophila. J Appl Microbiol 2016; 121:341-51. [PMID: 27124660 DOI: 10.1111/jam.13160] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 02/17/2016] [Accepted: 04/21/2016] [Indexed: 12/17/2022]
Abstract
AIMS The aims of this study were to characterize the antibacterial activity and the chemotype of Litsea cubeba leaf essential oil (EO) harvested in North Vietnam and to investigate the biological effects induced by the leaf powder on growth, nonspecific immunity and survival of common carp (Cyprinus carpio) challenged with Aeromonas hydrophila. METHODS AND RESULTS The EO showed the prevalence of linalool (95%, n = 5). It was bactericidal against the majority of tested strains, with minimum inhibitory concentrations ranging from 0·72 to 2·89 mg ml(-1) (Aer. hydrophila, Edwarsiella tarda, Vibrio furnissii, Vibrio parahaemolyticus, Streptococcus garvieae, Escherichia coli, Salmonella Typhimurium). The fish was fed with 0 (control), 2, 4 and 8% leaf powder supplementation diets for 21 days. Nonspecific immunity parameters (lysozyme, haemolytic and bactericidal activities of plasma) were assessed 21 days after feeding period and before the experimental infection. Weight gain, specific growth rate and feed conversion ratio were improved by supplementation of L. cubeba in a dose-related manner, and a significant difference appeared at the highest dose (8%) when compared to the control. The increase in plasma lysozyme was significant for all the treated groups. Haemolysis activity was higher for the groups fed with 4 and 8% plant powder. Antibacterial activity increased significantly for the 8% dose only. CONCLUSIONS Litsea cubeba leaf powder increased nonspecific immunity of carps in dose-related manner. After infection with Aer. hydrophila, survivals of fish fed with 4 and 8% L. cubeba doses were significantly higher than those fed with 2% dose and the control. SIGNIFICANCE AND IMPACT OF THE STUDY A range of 4-8% L. cubeba leaf powder supplementation diet (from specific linalool-rich chemotype) can be used in aquaculture to reduce antibiotic burden and impacts of diseases caused by Aer. hydrophila.
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Affiliation(s)
- H V Nguyen
- Hanoi University of Science and Technology, Hanoi, Vietnam.,UMR Qualisud, CIRAD, Montpellier, France.,UMR Qualisud, CIRAD, Hanoi, Vietnam
| | - D Caruso
- ISEM UMR 226, IRD, Montpellier, France
| | - M Lebrun
- UMR Qualisud, CIRAD, Montpellier, France
| | - N T Nguyen
- Vietnam National University of Agriculture, Hanoi, Vietnam
| | - T T Trinh
- Vietnam National University of Agriculture, Hanoi, Vietnam
| | - J-C Meile
- UMR Qualisud, CIRAD, Montpellier, France
| | - S Chu-Ky
- Hanoi University of Science and Technology, Hanoi, Vietnam
| | - S Sarter
- UMR Qualisud, CIRAD, Montpellier, France.,UMR Qualisud, CIRAD, Hanoi, Vietnam
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Nguyen HX, Nguyen NT, Dang PH, Thi PH, Nguyen MTT, Can MV, Dibwe DF, Ueda JY, Matsumoto K, Awale S. A New Cassane-type Diterpene from the Seed of Caesalpinia sappan. Nat Prod Commun 2016; 11:723-724. [PMID: 27534101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023] Open
Abstract
Phytochemical investigation of the CH2Cl2 extract of the Vietnamese medicinal plant Caesalpinia sappan Linn resulted in the isolation of a new cassane-type diterpene named tomocin I (1). Its chemical structure was determined by NMR spectroscopic and mass spectrometric analysis.
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Nguyen HX, Nguyen NT, Dang PH, Thi PH, Nguyen MTT, Van Can M, Dibwe DF, Ueda JY, Matsumoto K, Awale S. A New Cassane-type Diterpene from the Seed of Caesalpinia Sappan. Nat Prod Commun 2016. [DOI: 10.1177/1934578x1601100606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Phytochemical investigation of the CH2C12 extract of the Vietnamese medicinal plant Caesalpinia sappan Linn resulted in the isolation of a new cassane-type diterpene named tomocin I (1). Its chemical structure was determined by NMR spectroscopic and mass spectrometric analysis.
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Affiliation(s)
- Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University-Ho Chi Minh City, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Nhan Trung Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University-Ho Chi Minh City, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Phu Hoang Dang
- Faculty of Chemistry, University of Science, Vietnam National University-Ho Chi Minh City, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Phuoc Ho Thi
- Faculty of Chemistry, University of Science, Vietnam National University-Ho Chi Minh City, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University-Ho Chi Minh City, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City, Vietnam
| | - Mao Van Can
- Vietnam Military Medical University, 160 Phung Hung Street, Dong Ha, Ha Noi, Vietnam
| | - Dya Fita Dibwe
- Division of Medicinal Pharmacology, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Jun-ya Ueda
- Faculty of Pharmaceutical Sciences, Hiroshima International University, 5-1-1 Hirokoshingai, Kure, Hiroshima 737-0112, Japan
| | - Kinzo Matsumoto
- Division of Medicinal Pharmacology, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Suresh Awale
- ivision of Natural Drug Discovery, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
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Nguyen HX, Nguyen NT, Dang PH, Thi Ho P, Nguyen MTT, Van Can M, Dibwe DF, Ueda JY, Awale S. Cassane diterpenes from the seed kernels of Caesalpinia sappan. Phytochemistry 2016; 122:286-293. [PMID: 26769396 DOI: 10.1016/j.phytochem.2015.12.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [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: 06/23/2015] [Revised: 12/18/2015] [Accepted: 12/31/2015] [Indexed: 06/05/2023]
Abstract
Eight structurally diverse cassane diterpenes named tomocins A-H were isolated from the seed kernels of Vietnamese Caesalpinia sappan Linn. Their structures were determined by extensive NMR and CD spectroscopic analysis. Among the isolated compounds, tomocin A, phanginin A, F, and H exhibited mild preferential cytotoxicity against PANC-1 human pancreatic cancer cells under nutrition-deprived condition without causing toxicity in normal nutrient-rich conditions.
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Affiliation(s)
- Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University-Ho Chi Minh City, Viet Nam
| | - Nhan Trung Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University-Ho Chi Minh City, Viet Nam
| | - Phu Hoang Dang
- Faculty of Chemistry, University of Science, Vietnam National University-Ho Chi Minh City, Viet Nam
| | - Phuoc Thi Ho
- Faculty of Chemistry, University of Science, Vietnam National University-Ho Chi Minh City, Viet Nam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University-Ho Chi Minh City, Viet Nam.
| | - Mao Van Can
- Vietnam Military Medical University, Ha Noi, Viet Nam
| | - Dya Fita Dibwe
- Division of Natural Drug Discovery, Department of Translational Research, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Jun-Ya Ueda
- Division of Natural Drug Discovery, Department of Translational Research, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Suresh Awale
- Division of Natural Drug Discovery, Department of Translational Research, Institute of Natural Medicine, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan.
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Nguyen HX, Nguyen NT, Nguyen MHK, Le TH, Van Do TN, Hung TM, Nguyen MTT. Tyrosinase inhibitory activity of flavonoids from Artocarpus heterophyllous. Chem Cent J 2016; 10:2. [PMID: 26834825 PMCID: PMC4734850 DOI: 10.1186/s13065-016-0150-7] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [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: 10/30/2015] [Accepted: 01/10/2016] [Indexed: 12/28/2022] Open
Abstract
Background
Tyrosinase is an oxidoreductase that is very important in medicine and cosmetics because the excessive production of melanin causes hyperpigmentation. The development of novel, effective tyrosinase inhibitors has long been pursued. In preliminary tests, we found that an extract of the wood of Artocarpus heterophyllous (AH) potently inhibited tyrosinase activity. Results Two new flavonoids, artocaepin E (1) and artocaepin F (2), were isolated from the wood of AH, together with norartocarpetin (3), artocarpanone (4), liquiritigenin (5), steppogenin (6), and dihydromorin (7). Their structures were elucidated using one-dimensional (1D) and two-dimensional (2D) nuclear magnetic resonance (NMR) and mass spectrometry. The absolute configuration of 2 was determined from the circular dichroism (CD) spectrum. Artocarpanone (4) had the most potent tyrosinase inhibitory effect, with an IC50 of 2.0 ± 0.1 μM, followed by artocaepin E (1) and steppogenin (6), with IC50 values of 6.7 ± 0.8 and 7.5 ± 0.5 μM, respectively. A kinetic investigation indicated that 1 showed competitive inhibition, with an inhibition constant (Ki) of 6.23 μM. Conclusions These results demonstrate that extracts of the wood of AH and its phytochemical constituents are potential sources for skin-whitening agents.Artocarmin E (1) and artocarmin F (2) were isolated from the wood of Artocarpus heterophyllous. Their structures were elucidated using nuclear magnetic resonance analysis and mass spectrometric methods ![]() Electronic supplementary material The online version of this article (doi:10.1186/s13065-016-0150-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Hai Xuan Nguyen
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Nhan Trung Nguyen
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam ; Cancer Research Laboratory, Vietnam National University, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Mai Ha Khoa Nguyen
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Tho Huu Le
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Truong Nhat Van Do
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
| | - Tran Manh Hung
- Department of Biomedical Sciences, Institute for Research and Executive Education (VNUK), The University of Danang, 41 Le Duan, Haichau District, Danang, Vietnam
| | - Mai Thanh Thi Nguyen
- Faculty of Chemistry, University of Science, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam ; Cancer Research Laboratory, Vietnam National University, 227 Nguyen Van Cu, District 5, Ho Chi Minh, Vietnam
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Nguyen NT, Vafin RR, Rzhanov IV, Kolpakov AI, Gataullin IG, Tyulkin SV, Sinyagina MN, Grigoryeva TV, Ilinskaya ON. [MOLECULAR-GENETIC ANALYSIS OF MICROORGANISMS WITH INTRAEPITHELIAL INVASION ISOLATED FROM PATIENTS WITH COLORECTAL CANCER]. Mol Gen Mikrobiol Virusol 2016; 34:13-18. [PMID: 27183716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The facultative aerobic bacteria isolated from the mucosa of rectum in patients with colorectal cancer in the zone of malignant tumor and neighboring normal mucosa was studied using molecular-genetic methods. The species attribution of bacteria was implemented using the cultural-morphological analysis and sequencing of the 16S rRNA locus. The microorganisms with the intraepithelial invasion to rectal mucosa isolated were identified as representatives of the adherent-invasive (AIEC) subgroup of Escherichia coli and species Klebsiella pneumonia. The molecular analysis by genetic determinants controlling adhesive, hemolytic, and toxigenic activity revealed that some bacterial isolates were able to produce toxins with potential cancerogenic activity (e.g., colibactin and cytotoxic necrotic factor I). Certain bacterial species isolated from malignant and normal rectum epithelium of the same patient demonstrated no difference between analyzed factors of toxigenicity.
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Yuan D, Zhang J, Yan S, Pan C, Alici G, Nguyen NT, Li WH. Dean-flow-coupled elasto-inertial three-dimensional particle focusing under viscoelastic flow in a straight channel with asymmetrical expansion-contraction cavity arrays. Biomicrofluidics 2015; 9:044108. [PMID: 26339309 PMCID: PMC4522007 DOI: 10.1063/1.4927494] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2015] [Accepted: 07/14/2015] [Indexed: 05/08/2023]
Abstract
In this paper, 3D particle focusing in a straight channel with asymmetrical expansion-contraction cavity arrays (ECCA channel) is achieved by exploiting the dean-flow-coupled elasto-inertial effects. First, the mechanism of particle focusing in both Newtonian and non-Newtonian fluids was introduced. Then particle focusing was demonstrated experimentally in this channel with Newtonian and non-Newtonian fluids using three different sized particles (3.2 μm, 4.8 μm, and 13 μm), respectively. Also, the effects of dean flow (or secondary flow) induced by expansion-contraction cavity arrays were highlighted by comparing the particle distributions in a single straight rectangular channel with that in the ECCA channel. Finally, the influences of flow rates and distances from the inlet on focusing performance in the ECCA channel were studied. The results show that in the ECCA channel particles are focused on the cavity side in Newtonian fluid due to the synthesis effects of inertial and dean-drag force, whereas the particles are focused on the opposite cavity side in non-Newtonian fluid due to the addition of viscoelastic force. Compared with the focusing performance in Newtonian fluid, the particles are more easily and better focused in non-Newtonian fluid. Besides, the Dean flow in visco-elastic fluid in the ECCA channel improves the particle focusing performance compared with that in a straight channel. A further advantage is three-dimensional (3D) particle focusing that in non-Newtonian fluid is realized according to the lateral side view of the channel while only two-dimensional (2D) particle focusing can be achieved in Newtonian fluid. Conclusively, this novel Dean-flow-coupled elasto-inertial microfluidic device could offer a continuous, sheathless, and high throughput (>10 000 s(-1)) 3D focusing performance, which may be valuable in various applications from high speed flow cytometry to cell counting, sorting, and analysis.
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Affiliation(s)
- D Yuan
- School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong , Wollongong, New South Wales 2522, Australia
| | - J Zhang
- School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong , Wollongong, New South Wales 2522, Australia
| | - S Yan
- School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong , Wollongong, New South Wales 2522, Australia
| | - C Pan
- School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong , Wollongong, New South Wales 2522, Australia
| | - G Alici
- School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong , Wollongong, New South Wales 2522, Australia
| | - N T Nguyen
- Queensland Micro and Nanotechnology Centre, Griffith University , Brisbane, Queensland 4111, Australia
| | - W H Li
- School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong , Wollongong, New South Wales 2522, Australia
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