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Pham HT, Doan TP, Kim HW, Kim TW, Park SY, Kim H, Lee M, Kim KH, Oh WK, Lim YW, Kang KB. Correction to "Cyclohumulanoid Sesquiterpenes Induced by the Noncompetitive Coculture of Phellinus orientoasiaticus and Xylodon flaviporus". J Nat Prod 2023; 86:2079. [PMID: 37582070 DOI: 10.1021/acs.jnatprod.3c00692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
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Lee HJ, Zhang M, Doan TP, Park EJ, Nghiem DT, Pham HTT, Pan CH, Oh WK. Chemical constituents with senolytic activity from the stems of Limacia scandens. Phytochemistry 2023:113740. [PMID: 37236331 DOI: 10.1016/j.phytochem.2023.113740] [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] [Received: 02/03/2023] [Revised: 05/15/2023] [Accepted: 05/22/2023] [Indexed: 05/28/2023]
Abstract
While screening senotherapeutics from natural products, seven undescribed chemicals, two syringylglycerol derivatives, two cyclopeptides, one tigliane analogue, and two chromone derivatives, as well as six known compounds were isolated from the stems of Limacia scandens. The structures of compounds were elucidated through spectroscopic data analysis, including 1D and 2D NMR, HRESIMS, and CD data. All compounds were tested in replicative senescent human dermal fibroblasts (HDFs) to determine their potential as senotherapeutic agents to specifically target senescent cells. One tigliane and two chromones derivatives showed senolytic activity, indicating that senescent cells were selectively removed. Especially, 2-{2-[(3'-O-β-d-glucopyranosyl)phenyl]ethyl}chromone is expected to be a potential senotherapeutics by inducing HDF death, inhibiting the activity of senescence-associated β-galactosidase (SA-β-gal) and expressing senescence-associated secretory phenotype (SASP) factors.
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Affiliation(s)
- Hee Ju Lee
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea; Natural Product Informatics Research Center, Korea Institute of Science and Technology, Gangneung, 25451, Republic of Korea
| | - Mi Zhang
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Thi Phuong Doan
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Eun-Jin Park
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Duc-Trong Nghiem
- Department of Botany, Hanoi University of Pharmacy, 000084, Hanoi, Viet Nam
| | | | - Cheol-Ho Pan
- Natural Product Informatics Research Center, Korea Institute of Science and Technology, Gangneung, 25451, Republic of Korea
| | - Won-Keun Oh
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea.
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Cho HM, Park EJ, Park YJ, Ponce-Zea J, Mai VH, Doan TP, Ryu B, Chin YW, Oh WK. Sesquiterpene lactone and its unique proaporphine hybrids from Magnolia grandiflora L. and their anti-inflammatory activity. Phytochemistry 2022; 200:113211. [PMID: 35490776 DOI: 10.1016/j.phytochem.2022.113211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 11/12/2021] [Revised: 04/13/2022] [Accepted: 04/13/2022] [Indexed: 06/14/2023]
Abstract
Two undescribed sesquiterpene lactone-proaporphine hybrid skeletons, two undescribed sesquiterpenes, and four known compounds were isolated from the aerial part of Magnolia grandiflora L. The structures of isolated compounds were unambiguously determined based on the interpretation of a combination of NMR spectroscopy, HRESIMS, DP4+ probability calculation of carbon data, X-ray crystallographic analyses, and ECD calculation. The isolated compounds were investigated for their anti-inflammatory activity against nitric oxide production and the protein expression of COX-2 in LPS-stimulated RAW 264.7 cells.
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Affiliation(s)
- Hyo Moon Cho
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Eun Jin Park
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Yeon Joo Park
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jorge Ponce-Zea
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Van Hieu Mai
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Thi Phuong Doan
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Byeol Ryu
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Young Won Chin
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea
| | - Won Keun Oh
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 08826, Republic of Korea.
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Pham HT, Doan TP, Kim HW, Kim TW, Park SY, Kim H, Lee M, Kim KH, Oh WK, Lim YW, Kang KB. Cyclohumulanoid Sesquiterpenes Induced by the Noncompetitive Coculture of Phellinus orientoasiaticus and Xylodon flaviporus. J Nat Prod 2022; 85:511-518. [PMID: 35073082 DOI: 10.1021/acs.jnatprod.1c01022] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Microbial cocultivation has been applied as a strategy to induce the biosynthesis of specialized metabolites. However, most previous studies have focused on competitive interactions between test strains. During our LC-MS-based chemical screening of randomized cocultures of Basidiomycetous fungi, we discovered that the coculture of Phellinus orientoasiaticus (Hymenochaetaceae) and Xylodon flaviporus (Schizoporaceae) induces multiple metabolites, although they did not show any competitive morphology. Targeted isolation yielded three new sesquiterpenes (1-3) along with five known analogues (4-8). The structures of the isolates were determined by MS and NMR experiments as well as electronic circular dichroism analysis. LC-MS analysis suggested that cyclohumulanoids of illudane-, sterpurane-, and tremulane-type scaffolds (1-7) were produced by P. orientoasiaticus, whereas a drimane-type sesquiterpene (8) was produced by X. flaviporus. None of the isolates exhibited antifungal activity or cytotoxicity, and compounds 1-7 exhibited NO production of LPS-treated RAW276.4 cells in a range of 15.9% to 38.0% at 100 μM.
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Affiliation(s)
- Huong T Pham
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Sookmyung Women's University, Seoul 04310, Korea
| | - Thi Phuong Doan
- College of Pharmacy, Seoul National University, Seoul 08826, Korea
| | - Hyun Woo Kim
- College of Pharmacy, Seoul National University, Seoul 08826, Korea
| | - Tae Wan Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea
| | - So-Yeon Park
- College of Pharmacy, Sunchon National University, Suncheon 57922, Korea
| | - Hangun Kim
- College of Pharmacy, Sunchon National University, Suncheon 57922, Korea
| | - Mina Lee
- College of Pharmacy, Sunchon National University, Suncheon 57922, Korea
| | - Ki Hyun Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Korea
| | - Won Keun Oh
- College of Pharmacy, Seoul National University, Seoul 08826, Korea
| | - Young Woon Lim
- School of Biological Sciences and Institute of Microbiology, Seoul National University, Seoul 08826, Korea
| | - Kyo Bin Kang
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Sookmyung Women's University, Seoul 04310, Korea
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Ryu B, Cho HM, Zhang M, Lee BW, Doan TP, Park EJ, Lee HJ, Oh WK. Meroterpenoids from the leaves of Psidium guajava (guava) cultivated in Korea using MS/MS-based molecular networking. Phytochemistry 2021; 186:112723. [PMID: 33799192 DOI: 10.1016/j.phytochem.2021.112723] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [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: 09/29/2020] [Revised: 02/05/2021] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
MS/MS-based molecular networking showed differences in the chemical profiles, especially the terpenoid-coupled-phloroglucinol clusters, of Psidium guajava grown in Jeju Island of South Korea ("Jejuguava"), Vietnam and China. A chemical investigation of the 95% EtOH extract of Jejuguava leaves revealed meroterpenoids characterized by a dihydropyran ring junction between an acylphloroglucinol structure and terpenoid, and named jejuguajavones A-J (1-10). Compounds (±)-8-(±)-10 are racemic mixtures that were separated using a chiral HPLC column. The chemical structures of all the isolated compounds (1-10) were determined by analyzing the spectroscopic data and performing electronic circular dichroism calculations. Among the isolates, compounds 1-4 exhibit inhibitory activity against the protein tyrosine phosphatase 1B (PTP1B) enzyme, and this result was confirmed by molecular docking simulations.
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Affiliation(s)
- Byeol Ryu
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Hyo Moon Cho
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Mi Zhang
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Ba Wool Lee
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Thi Phuong Doan
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Eun Jin Park
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 151-742, Republic of Korea
| | - Hee Ju Lee
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 151-742, Republic of Korea; Natural Product Informatics Research Center, Korea Institute of Science and Technology, Gangneung, Republic of Korea
| | - Won Keun Oh
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul, 151-742, Republic of Korea.
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Lee BW, Quy Ha TK, Park EJ, Cho HM, Ryu B, Doan TP, Lee HJ, Oh WK. Melicopteline A-E, Unusual Cyclopeptide Alkaloids with Antiviral Activity against Influenza A Virus from Melicope pteleifolia. J Org Chem 2020; 86:1437-1447. [PMID: 33369410 DOI: 10.1021/acs.joc.0c02137] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
In the search for antiviral cyclopeptides against influenza A virus, five unprecedented Caryophyllaceae-type cyclopeptides (1-5) were isolated from the leaves of Melicope pteleifolia. Their chemical structures and absolute configurations were unambiguously determined by means of advanced Marfey's analysis and comprehensive spectroscopic analyses including two-dimensional nuclear magnetic resonance and MS/MS fragmentation. Interestingly, compounds 3-5 contain an unusual heterocycle, a 3a-hydroxypyrroloindole moiety, which was biosynthetically formed by a nucleophilic cyclization from the least abundant amino acid, tryptophan, precursor and has aroused a great interest in the aspect of chemical diversity and biological activity. All isolates (1-5) were evaluated for their protective effects against influenza A viruses H1N1 and H9N2 in MDCK cells. All isolated cyclopeptides exhibited strong anti-influenza activity, especially against H1N1. Compound 3 showed the most potent CPE inhibition effect, which was stronger than that of the positive control ribavirin against H1N1, with an EC50 (μM) of 2.57 ± 0.45 along with higher selectivity.
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Affiliation(s)
- Ba Wool Lee
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Thi Kim Quy Ha
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea.,Cantho University, Campus II, Cantho City 900000, Vietnam
| | - Eun Jin Park
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyo Moon Cho
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Byeol Ryu
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Thi Phuong Doan
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Hee Ju Lee
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea.,Natural Product Informatics Research Center, Korea Institute of Science and Technology, Gangneung 25451, Republic of Korea
| | - Won Keun Oh
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
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Lee YR, Cho HM, Park EJ, Zhang M, Doan TP, Lee BW, Cho KA, Oh WK. Metabolite Profiling of Rambutan ( Nephelium lappaceum L.) Seeds Using UPLC-qTOF-MS/MS and Senomorphic Effects in Aged Human Dermal Fibroblasts. Nutrients 2020; 12:nu12051430. [PMID: 32429147 PMCID: PMC7284571 DOI: 10.3390/nu12051430] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/08/2020] [Accepted: 05/12/2020] [Indexed: 12/12/2022] Open
Abstract
Nephelium lappaceum (rambutan) is an edible tropical fruit that is widely grown in Southeast Asia. In general, the seeds contain high nutrients, but rambutan seeds are thrown out during processing. In this study, the anti-aging activity of rambutan seeds was evaluated with a new approach through the selective inhibition of the senescence-associated secretory phenotype (senomorphics). Luciferase promoter assays using p16INK4A and SA-β-gal promoters for rambutan showed that its seeds possessed strong senomorphic activity. Molecular networking using ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-qTOF-MS) with a tandem database (UPLC-qTOF-MS/MS) was applied to determine the chemical composition of rambutan. Based on the activity results, nine compounds, one new (7) and eight known kaempferol type compounds, were isolated from the seeds. Compounds 2, 4 and 9 significantly reduced the mRNA expression levels of senescence markers, such as p16INK4A, p21CIP1, p53 and SA-β-gal. These compounds also significantly increased the level of SIRT1, a longevity modulator. Compounds 2, 4 and 9 decreased the mRNA expression levels of senescence-associated secretory phenotypes (SASPs) and subsequently decreased the number of SA-β-gal-positive cells. Thus, rambutan seeds and its constituents might be able to protect against age-related problems.
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Affiliation(s)
- Yae Rin Lee
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (Y.R.L.); (H.M.C.); (E.J.P.); (M.Z.); (T.P.D.); (B.W.L.)
| | - Hyo Moon Cho
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (Y.R.L.); (H.M.C.); (E.J.P.); (M.Z.); (T.P.D.); (B.W.L.)
| | - Eun Jin Park
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (Y.R.L.); (H.M.C.); (E.J.P.); (M.Z.); (T.P.D.); (B.W.L.)
| | - Mi Zhang
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (Y.R.L.); (H.M.C.); (E.J.P.); (M.Z.); (T.P.D.); (B.W.L.)
| | - Thi Phuong Doan
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (Y.R.L.); (H.M.C.); (E.J.P.); (M.Z.); (T.P.D.); (B.W.L.)
| | - Ba Wool Lee
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (Y.R.L.); (H.M.C.); (E.J.P.); (M.Z.); (T.P.D.); (B.W.L.)
| | - Kyung A Cho
- Department of Biochemistry, Chonnam National University Medical School, Gwangju 51828, Korea;
| | - Won Keun Oh
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (Y.R.L.); (H.M.C.); (E.J.P.); (M.Z.); (T.P.D.); (B.W.L.)
- Correspondence: ; Tel.: +82-2-880-7872
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An JP, Park EJ, Ryu B, Lee BW, Cho HM, Doan TP, Pham HTT, Oh WK. Oleanane Triterpenoids from the Leaves of Gymnema inodorum and Their Insulin Mimetic Activities. J Nat Prod 2020; 83:1265-1274. [PMID: 32237726 DOI: 10.1021/acs.jnatprod.0c00051] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
During an effort to find insulin mimetic compounds, the leaves of Gymnema inodorum were shown to have a stimulatory effect on glucose uptake in 3T3-L1 adipocyte cells. Bioassay-guided fractionation on a 70% ethanol extract of G. inodorum was applied to yield two new (1 and 2) and two known (8 and 9) oleanane triterpenoids with a methyl anthranilate moiety together with five further new oleanane triterpenoids (3-7). The chemical structures of all isolates were determined based on their spectroscopic data, including IR, UV, NMR, and mass spectrometric analysis. The isolated compounds (1-9) were determined for their stimulatory activities on glucose uptake in differentiated 3T3-L1 adipocyte cells using 2-deoxy-2-[(7-nitro-2,1,3-benzoxadiazol-4-yl)amino]-d-glucose (2-NBDG) as a fluorescent-tagged glucose probe. Three compounds (3, 5, and 9) showed stimulatory effects on the uptake of 2-NBDG in 3T3-L1 adipocyte cells. Chemicals with a methyl anthranilate moiety have been considered as crucial contributors of flavor odor in foods, and quantitative analysis showed the content of compound 8 to be 0.90 ± 0.01 mg/g of the total extract. These results suggest that the leaves of G. inodorum have the potential to be used as an antidiabetic functional food or tea.
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Affiliation(s)
- Jin-Pyo An
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Eun Jin Park
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Byeol Ryu
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Ba Wool Lee
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyo Moon Cho
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | - Thi Phuong Doan
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
| | | | - Won Keun Oh
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
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Cho HM, Doan TP, Ha TKQ, Kim HW, Lee BW, Pham HTT, Cho TO, Oh WK. Dereplication by High-Performance Liquid Chromatography (HPLC) with Quadrupole-Time-of-Flight Mass Spectroscopy (qTOF-MS) and Antiviral Activities of Phlorotannins from Ecklonia cava. Mar Drugs 2019; 17:E149. [PMID: 30836593 PMCID: PMC6471242 DOI: 10.3390/md17030149] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 02/22/2019] [Accepted: 02/26/2019] [Indexed: 01/13/2023] Open
Abstract
Ecklonia cava is edible seaweed that is found in Asian countries, such as Japan and Korea; and, its major components include fucoidan and phlorotannins. Phlorotannins that are isolated from E. cava are well-known to have an antioxidant effect and strong antiviral activity against porcine epidemic diarrhea virus (PEDV), which has a high mortality rate in piglets. In this study, the bioactive components were determined based on two different approaches: (i) bio-guided isolation using the antiviral activity against the H1N1 viral strain, which is a representative influenza virus that originates from swine and (ii) high-resolution mass spectrometry-based dereplication, including relative mass defects (RMDs) and HPLC-qTOFMS fragmentation analysis. The EC70 fraction showed the strongest antiviral activity and contained thirteen phlorotannins, which were predicted by dereplication. Ten compounds were directly isolated from E. cava extract and then identified. Moreover, the dereplication method allowed for the discovery of two new phlorotannins. The structures of these two isolated compounds were elucidated using NMR techniques and HPLC-qTOFMS fragmentation analysis. In addition, molecular modelling was applied to determine the absolute configurations of the two new compounds. The antiviral activities of seven major phlorotannins in active fraction were evaluated against two influenza A viral strains (H1N1 and H9N2). Six of the compounds showed moderate to strong effects on both of the viruses and phlorofucofuroeckol A (12), which showed an EC50 value of 13.48 ± 1.93 μM, is a potential active antiviral component of E. cava.
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Affiliation(s)
- Hyo Moon Cho
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Thi Phuong Doan
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Thi Kim Quy Ha
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Hyun Woo Kim
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Ba Wool Lee
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Ha Thanh Tung Pham
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
| | - Tae Oh Cho
- Marine Bio Research Center, Department of Life Science, Chosun University, Gwangju 501-759, Korea.
| | - Won Keun Oh
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 08826, Korea.
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10
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Cao Y, Dave KB, Doan TP, Prescott SM. Fatty acid CoA ligase 4 is up-regulated in colon adenocarcinoma. Cancer Res 2001; 61:8429-34. [PMID: 11731423] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Arachidonic acid metabolism plays an important role in colon carcinogenesis. Cyclooxygenase-2 (COX-2), which catalyzes the rate-limiting step in the synthesis of prostaglandins from arachidonic acids, is known to be up-regulated in colon cancer, and multiple lines of evidence indicate that it is a critical early step in colon carcinogenesis. Recently, 15-lipoxygenase-1, the enzyme that converts arachidonic acid to 15(S)-HETE, was also found to be up-regulated in colon carcinoma. In our previous studies, we cloned a gene that encodes another arachidonic acid-using enzyme, fatty acid CoA ligase 4 (FACL4), and showed that overexpression of this enzyme prevents apoptosis. We have also showed that FACL4 and COX-2 synergistically inhibit apoptosis by reducing the intracellular level of free arachidonic acid. Here, we report that expression of FACL4 is significantly increased in colon adenocarcinoma compared with adjacent normal tissue at both the mRNA and protein levels by quantitative RT-PCR (paired t test, P < 0.015), immunoblot, and immunohistochemical staining. We found that the increase in expression level of FACL4 mRNA relative to control ranged between 2.4- and 54.5-fold; the average fold-increase was 13.4. The increase in FACL4 protein expression is between 2.4- and 65.0-fold. In addition, we found that a higher level of increased FACL4 expression was correlated with well and moderately differentiated adenocarcinoma, whereas no similar correlation was observed with COX-2 expression. The in situ hybridization results indicate that expression of FACL4 is localized predominantly in the colon epithelium but not in the stroma. The onset of FACL4 up-regulation appears to occur during the transformation from adenoma to adenocarcinoma because FACL4 expression was not increased above normal in the three colon adenomas examined. Finally, we observed that a tumor promoter significantly induced FACL4 expression. These findings suggest that the FACL4 pathway may be important in colon carcinogenesis, and that the development of selective inhibitors for FACL4 may be a worthy effort in the prevention and treatment of colon cancer.
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Affiliation(s)
- Y Cao
- Huntsman Cancer Institute, University of Utah, Salt Lake City, Utah 84112, USA.
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Hsu LC, Doan TP, White RL. Identification of a gamma-tubulin-binding domain in BRCA1. Cancer Res 2001; 61:7713-8. [PMID: 11691781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
We previously reported (L-C. Hsu and R. L. White, Proc. Natl. Acad. Sci. USA, 95: 12983-12988, 1998) that hypophosphorylated BRCA1 is associated with mitotic centrosomes in vivo, perhaps through its interaction with gamma-tubulin. In vitro evidence presented here indicates that full-length BRCA1 protein generated by in vitro translation interacts with gamma-tubulin. A specific domain of BRCA1 protein, BRCA1 fragment no. 3 (BF3; amino acids 504-803), is both necessary and sufficient to bind gamma-tubulin. BF3 and gamma-tubulin coimmunoprecipitated when coexpressed in cells. In addition, expression of BF3 interfered with the interaction between BRCA1 and gamma-tubulin. Stable transformants of COS-7 cells that overexpressed BF3 showed a reduced growth rate partly because of increased apoptosis. Furthermore, overexpression of BF3 in COS-7 cells results in the accumulation of mitotic cells with multiple centrosomes and abnormal spindles. Okadaic acid, an inhibitor of protein phosphatases types 1 and 2A, induces hyperphosphorylation of BRCA1, a reduction of both BRCA1 and gamma-tubulin associated with mitotic centrosomes, and an accumulation of abnormal spindle formation. Thus, attenuating the interaction between BRCA1 and gamma-tubulin, and their association with mitotic centrosomes, may induce an increase of aneuploid cell population and contribute to tumorigenesis.
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Affiliation(s)
- L C Hsu
- Department of Oncological Sciences, University of Utah, Salt Lake City, Utah 84112, USA.
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Olson TM, Doan TP, Kishimoto NY, Whitby FG, Ackerman MJ, Fananapazir L. Inherited and de novo mutations in the cardiac actin gene cause hypertrophic cardiomyopathy. J Mol Cell Cardiol 2000; 32:1687-94. [PMID: 10966831 DOI: 10.1006/jmcc.2000.1204] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mutations in genes encoding sarcomeric proteins cause hypertrophic cardiomyopathy (HCM). The sarcomeric protein actin plays a central, dual role in cardiac myocytes, generating contractile force by interacting with myosin and also transmitting force within and between cells. Two missense mutations in the cardiac actin gene (ACTC), postulated to impair force transmission, have been associated with familial dilated cardiomyopathy (DCM). Recently, a missense mutation in ACTC was found to cosegregate with familial HCM. To further test the hypothesis that mutations within functionally distinct domains of ACTC cause either DCM or HCM, we performed mutational analyses in 368 unrelated patients with familial or sporadic HCM. Single strand conformation polymorphism and sequence analyses of genomic DNA were performed. De novo mutations in ACTC were identified in two patients with sporadic HCM who presented with syncope in early childhood. Patients were heterozygous for missense mutations resulting in Pro164Ala and Ala331Pro amino acid substitutions, adjacent to regions of actin-actin and actin-myosin interaction, respectively. A mutation that cosegregated with familial HCM was also found, causing a Glu99Lys substitution in a weak actomyosin binding domain. The cardiac phenotype in many affected patients was characterized by an apical form of HCM. These findings support the hypothesis that a single amino acid substitution in actin causes either congestive heart failure or maladaptive cardiac hypertrophy, depending on its effect on actin structure and function.
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Affiliation(s)
- T M Olson
- Department of Pediatrics, Division of Pediatric Cardiology, Salt Lake City, UT 84113, USA.
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