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Do LTM, Huynh TTN, Tran QHN, Nguyen HTM, Nguyen TTA, Nguyen TTN, Nguyen PHH, Sichaem J. Placoisoflavones A and B, two new cytotoxic isoflavonoids from Placolobium vietnamense N.D.Khôi & Yakovlev. Nat Prod Res 2024; 38:112-118. [PMID: 35945810 DOI: 10.1080/14786419.2022.2110092] [Citation(s) in RCA: 1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 07/28/2022] [Indexed: 10/15/2022]
Abstract
Two previously unreported isoflavonoids, placoisoflavones A and B (1 and 2), along with five known compounds, calopogonium isoflavone B (3), jamaicin (4), 6-methoxycalopogonium isoflavone A (5), vestitol (6), and caviunin (7) have been isolated from the stems of Placolobium vietnamense N.D.Khôi & Yakovlev. The structures of all isolated compounds were fully characterized using spectroscopic data and comparison with the previous literature. The cytotoxicity of all isolated compounds was evaluated against HepG2 cell line, and compound 1 showed the most potent cytotoxicity with an IC50 value of 8.0 μM.
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Affiliation(s)
- Lien T M Do
- Sai Gon University, Ho Chi Minh City, Vietnam
| | | | | | | | - Tuyet T A Nguyen
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | | | | | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang, Thailand
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2
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Nguyen HTM, Nguyen PKP, Ngo DTT, Sichaem J, Do LTM. Two new dimethylpyranoflavanones from the roots of Melodorum fruticosum. Nat Prod Res 2024; 38:433-439. [PMID: 36129773 DOI: 10.1080/14786419.2022.2126467] [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: 06/07/2022] [Accepted: 09/10/2022] [Indexed: 10/14/2022]
Abstract
Two previously unreported dimethylpyranoflavanones, pyronomelodorones A and B (1 and 2), along with five known compounds, 7-O-methyldihydrowogonin (3), 5,6,7-trimethoxyflavanone (4), 5,6-dihydroxy-7-methoxy-dihydroflavone (5), 5,7,8-trimethoxydihydroflavone (6), and pinostrobin (7), were isolated from the roots of Melodorum fruticosum. The structures of all isolates were fully characterized using spectroscopic data and comparison with the previous literature. All isolates were evaluated for their in vitro α-glucosidase inhibition and their cytotoxicity against KB, HepG2, and MCF7 cell lines. Among the isolates, compound 1 exhibited the most inhibitory activity against α-glucosidase and was superior to the positive control with an IC50 value of 1.32 μM. Compounds 1 and 2 showed weak cytotoxicity against the three human cancer cell lines, with IC50 values in the range of 53.3-79.0 μM.
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Affiliation(s)
- Huong T M Nguyen
- Department of Chemistry, University of Science, HCM National University, Ho Chi Minh City, Vietnam
- Institute of Environment-Energy Technology, Sai Gon University, Ho Chi Minh City, Vietnam
| | - Phung K P Nguyen
- Department of Chemistry, University of Science, HCM National University, Ho Chi Minh City, Vietnam
| | - Duong T T Ngo
- Department of Chemistry, University of Science, HCM National University, Ho Chi Minh City, Vietnam
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang, Thailand
| | - Lien T M Do
- Institute of Environment-Energy Technology, Sai Gon University, Ho Chi Minh City, Vietnam
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Nguyen HTM, Ngo DTT, Nguyen PDN, Pham TNK, Do LTM, Sichaem J. New prenyl flavanone and diarylbutanol from Uvaria siamensis stem bark and their α-glucosidase inhibitory activity. Nat Prod Res 2023:1-7. [PMID: 37865971 DOI: 10.1080/14786419.2023.2272024] [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: 06/21/2023] [Accepted: 10/07/2023] [Indexed: 10/24/2023]
Abstract
One new prenyl flavanone (1), (2S)-8-prenyl-5,6-dihydroxy-7-methoxyflavanone, and one new diarylbutanol (2), (7'S)-3'-hydroxy-linderagatin-A, were isolated from the stem bark of Uvaria siamensis (Annonaceae), along with five known compounds, eriodictyol (3), quercetin (4), paprazine (5), N-trans-caffeoyltyramine (6), and N-trans-feruloyltyramine (7). Their structures were determined through extensive spectroscopic analyses and comparison with the literature. The α-glucosidase inhibitory potential of 1-7 was evaluated. Compound 6 showed the highest inhibitory activity against α-glucosidase and exhibited superior potency compared to the positive control, with an IC50 value of 0.12 μM.
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Affiliation(s)
- Huong T M Nguyen
- Faculty of Chemistry, University of Science, HCM National University, Ho Chi Minh City, Vietnam
- Institute of Environment-Energy Technology, Sai Gon University, Ho Chi Minh City, Vietnam
| | - Duong T T Ngo
- Faculty of Chemistry, University of Science, HCM National University, Ho Chi Minh City, Vietnam
| | - Phung D N Nguyen
- Faculty of Chemistry, University of Science, HCM National University, Ho Chi Minh City, Vietnam
| | - Tuyen N K Pham
- Institute of Environment-Energy Technology, Sai Gon University, Ho Chi Minh City, Vietnam
| | - Lien T M Do
- Institute of Environment-Energy Technology, Sai Gon University, Ho Chi Minh City, Vietnam
| | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang, Thailand
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Nguyen TTA, Nguyen HL, Pham TNK, Nguyen PKP, Huynh TTN, Sichaem J, Do LTM. Bougainvinones NP, three new flavonoids from Bougainvillea spectabilis. Fitoterapia 2021; 149:104832. [PMID: 33460723 DOI: 10.1016/j.fitote.2021.104832] [Citation(s) in RCA: 3] [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: 11/24/2020] [Revised: 01/06/2021] [Accepted: 01/09/2021] [Indexed: 10/22/2022]
Abstract
In an effort to identify natural bioactive compounds, three new flavonoids (1-3) and six known compounds (4-9) were isolated from the stem bark of Bougainvillea spectabilis. The structures of these compounds were accomplished using comprehensive spectroscopic methods, including 1D and 2D NMR spectra with references to the literatures, as well as high-resolution mass spectrometric analysis. Their cytotoxicity against KB and HeLa S-3 cell lines was also evaluated.
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Affiliation(s)
- Tuyet T A Nguyen
- Department of Chemistry, Ho Chi Minh City University of Education, 748355, Viet Nam
| | - Hai L Nguyen
- Department of Chemistry, Ho Chi Minh City University of Education, 748355, Viet Nam
| | | | - Phung K P Nguyen
- University of Science, National University-Ho Chi Minh City, Ho Chi Minh City 748355, Viet Nam
| | | | - Jirapast Sichaem
- Research Unit in Natural Products Chemistry and Bioactivities, Faculty of Science and Technology, Thammasat University Lampang Campus, Lampang 52190, Thailand.
| | - Lien T M Do
- Sai Gon University, Ho Chi Minh City 748355, Viet Nam.
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Tuong TL, Do LTM, Aree T, Wonganan P, Chavasiri W. Tetrahydroxanthone-chromanone heterodimers from lichen Usnea aciculifera and their cytotoxic activity against human cancer cell lines. Fitoterapia 2020; 147:104732. [PMID: 32979465 DOI: 10.1016/j.fitote.2020.104732] [Citation(s) in RCA: 10] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 09/21/2020] [Accepted: 09/21/2020] [Indexed: 10/23/2022]
Abstract
Four new tetrahydroxanthone-chromanone heterodimers, usneaxanthones E-H (1-4) together with eleven known compounds (5-15) were isolated from lichen Usnea aciculifera Vain (Parmeliaceae). Their structures and absolute configurations, particularly the central and axial chiralities, were unambiguously demonstrated by a combination of spectroscopic data (1D, 2D NMR, HRESIMS), electronic circular dichroism (ECD) experiments, and single-crystal X-ray crystallographic analyses. The cytotoxicity of new compounds was evaluated on four human cancer cell lines including HCT116 colorectal cancer, MCF-7 breast cancer, A549 lung cancer, and OVCAR-3 ovarian cancer. Compounds 1-4 exhibited good cytotoxicity against all tested cancer cell lines, except ovarian cancer, with the best IC50 value of 3.37 μM. All compounds showed potent cytotoxicity against HCT116 colon cancer with IC50 value from 3.37 to 4.53 μM.
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Affiliation(s)
- Truong L Tuong
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Lien T M Do
- Institute of Environment-Energy Technology, Sai Gon University, Ho Chi Minh City 748355, Viet Nam
| | - Thammarat Aree
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Piyanuch Wonganan
- Department of Pharmacology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
| | - Warinthorn Chavasiri
- Center of Excellence in Natural Products Chemistry, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; Nanotec-CU Center of Excellence on Food and Agriclture, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
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Abstract
From the ethanol extract of Glinus oppositifolius, collected at Phu Yen province, Viet Nam, one new triterpenoid saponin (1) and four known compounds (2-5) were isolated. By means of NMR and HR-ESI-MS analyses, their structure was elucidated as 3-O-(β-D-xylopyranosyl-(1→3)-β-D-xylopyranosyl)spergulagenin A or glinusopposide V (1), glinusopposide L (2), spergulin B (3), vitexin (4) and astralagin (5). Two compounds (1-2) showed weak inhibitory activity against α-glucosidase.
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Affiliation(s)
- Thuy Thanh Phan
- Institute of Environment - Energy Technology, SaiGon University, Ho Chi Minh city, Vietnam
| | - Lien T M Do
- Institute of Environment - Energy Technology, SaiGon University, Ho Chi Minh city, Vietnam
| | - Trung Van Phung
- Center for Research and Technology Transfer, Vietnam Academy of Science and Technology (VAST), Ha Noi, Viet Nam
| | - Thu Thi Hoai Nguyen
- University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Vinh N Huynh
- Department of Organic Chemistry, University of Science, National University, Ho Chi Minh City, Vietnam
| | - Duong Thi Thuy Ngo
- Department of Organic Chemistry, University of Science, National University, Ho Chi Minh City, Vietnam
| | - Kim Phi Phung Nguyen
- Department of Organic Chemistry, University of Science, National University, Ho Chi Minh City, Vietnam
| | - Tuyet Thi Anh Nguyen
- Department of Chemistry, HCMC University of Education, Ho Chi Minh City, Vietnam
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Do LTM, Aree T, Siripong P, Vo NT, Nguyen TTA, Nguyen PKP, Tip-Pyang S. Cytotoxic Flavones from the Stem Bark of Bougainvillea spectabilis Willd. Planta Med 2018; 84:129-134. [PMID: 28800661 DOI: 10.1055/s-0043-118102] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Five new flavones possessing a fully substituted A-ring with C-6 and C-8 methyl groups, bougainvinones I - M (1: -5: ), along with three known congeners, 2'-hydroxydemethoxymatteucinol (6: ), 5,7,3',4'-tetrahydroxy-3-methoxy-6,8-dimethylflavone (7: ) and 5,7,4'-trihydroxy-3-methoxy-6,8-dimethylflavone (8: ), were isolated from the EtOAc extract of the stem bark of Bougainvillea spectabilis. Their structures were established by means of spectroscopic data (ultraviolet, infrared, high-resolution electrospray ionization mass spectrometry, and one-dimensional and two-dimensional nuclear magnetic resonance) and single-crystal X-ray crystallographic analysis. The in vitro cytotoxicity of all isolated compounds against five cancer cell lines (KB, HeLa S-3, MCF-7, HT-29, and HepG2) was evaluated. Compound 5: showed promising cytotoxic activity against the KB and HeLa S-3 cell lines, with IC50 values of 7.44 and 6.68 µM. The other compounds exhibited moderate cytotoxicity against the KB cell line.
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Affiliation(s)
- Lien T M Do
- Center of Excellence in Natural Products Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
- Sai Gon University, Ho Chi Minh City, Vietnam
| | - Thammarat Aree
- Center of Excellence in Natural Products Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Pongpun Siripong
- Natural Products Research Section, National Cancer Institute, Bangkok, Thailand
| | - Nga T Vo
- Ho Chi Minh City University of Technology and Education, Ho Chi Minh City, Vietnam
| | - Tuyet T A Nguyen
- Ho Chi Minh City University of Pedagogy, Ho Chi Minh City, Vietnam
| | - Phung K P Nguyen
- University of Science, National University - Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Santi Tip-Pyang
- Center of Excellence in Natural Products Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
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Do LTM, Aree T, Siripong P, Pham TNK, Nguyen PKP, Tip-Pyang S. Bougainvinones A-H, Peltogynoids from the Stem Bark of Purple Bougainvillea spectabilis and Their Cytotoxic Activity. J Nat Prod 2016; 79:939-945. [PMID: 26963142 DOI: 10.1021/acs.jnatprod.5b00996] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Eight new peltogynoids, named bougainvinones A-H (1-8), were obtained from the stem bark of Bougainvillea spectabilis. Their structures were elucidated by means of physical data (1D and 2D NMR, HRESIMS) and single-crystal X-ray crystallographic analyses. The peltogynoids, a rare type of modified flavonoids, are reported for the first time from this species of the genus Bougainvillea. All isolated compounds were evaluated for their cytotoxic effects against five cancer cell lines including KB, Hela S-3, HT-29, MCF-7, and HepG2. Among them, compound 7 showed cytotoxicity against five cancer cell lines with IC50 values in the 7.4-9.7 μM range, and compounds 2 and 3 exhibited cytotoxicity against the KB cell line with IC50 values of 6.6 and 9.0 μM.
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Affiliation(s)
- Lien T M Do
- Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University , Bangkok 10330, Thailand
- Sai Gon University , Ho Chi Minh City 748355, Vietnam
| | - Thammarat Aree
- Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University , Bangkok 10330, Thailand
| | - Pongpun Siripong
- Natural Products Research Section, Research Division, National Cancer Institute, Bangkok 10400, Thailand
| | | | - Phung K P Nguyen
- University of Science, National University - Ho Chi Minh City , Ho Chi Minh City 748355, Vietnam
| | - Santi Tip-Pyang
- Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University , Bangkok 10330, Thailand
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