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Cheng MJ, Wu MD, Hsieh SY, Chan HY, Chang HS, Chen JJ, Kuo YH. A Further Study of the Substrate Constituents of the Fungus Annulohypoxylon boveri var. microspora. Chem Nat Compd 2019. [DOI: 10.1007/s10600-019-02846-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Wu YH, Tseng CK, Wu HC, Wei CK, Lin CK, Chen IS, Chang HS, Lee JC. Avocado (Persea americana) fruit extract (2R,4R)-1,2,4-trihydroxyheptadec-16-yne inhibits dengue virus replication via upregulation of NF-κB-dependent induction of antiviral interferon responses. Sci Rep 2019; 9:423. [PMID: 30674997 PMCID: PMC6344542 DOI: 10.1038/s41598-018-36714-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 09/28/2018] [Indexed: 01/26/2023] Open
Abstract
Dengue virus (DENV) caused millions of infections around the world annually. Co-infection with different serotypes of DENV is associated with dengue hemorrhagic shock syndrome, leading to an estimate of 50% death rate. No approved therapies are currently available for the treatment of DENV infection. Hence, novel anti-DENV agents are urgently needed for medical therapy. Here we demonstrated that a natural product (2 R,4 R)-1,2,4-trihydroxyheptadec-16-yne (THHY), extracted from avocado (Persea americana) fruit, can inhibit DENV-2 replication in a concentration-dependent manner and efficiently suppresses replication of all DENV serotypes (1–4). We further reveal that the NF-κB-mediated interferon antiviral response contributes to the inhibitory effect of THHY on DENV replication. Using a DENV-infected ICR suckling mouse model, we found that THHY treatment caused an increased survival rate among mice infected with DENV. Collectively, these findings support THHY as a potential agent to control DENV infection.
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Wu HC, Cheng MJ, Wu MD, Chen JJ, Chen YL, Chang HS, Chen KP. Secondary metabolites from the fermented rice of the fungus Monascus purpureus and their bioactivities. Nat Prod Res 2018; 33:3541-3550. [DOI: 10.1080/14786419.2018.1488698] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Chang HS, Peng CJ, Cheng MJ, Wu HC, Chan HY, Hsieh SY, Yuan GF, Chen IS. Chemical Constituents of the Endophytic Fungus Phomopsis asparagi Isolated from the Plant Peperomia sui. Chem Nat Compd 2018. [DOI: 10.1007/s10600-018-2390-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Yang SS, Huang YH, Lai HC, Hsu LC, Guh JH, Cheng MJ, Chen IS, Chang HS. Anti-hyperglycemic constituents from the leaves of Cinnamomum macrostemon. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Chang CI, Chen CC, Chao CY, Ko HH, Chang HS, Wang SY, Chen JJ, Chen CC, Kuo YH. Two New Abietane-type Diterpenes from the Bark of Cryptomeria japonica. Nat Prod Commun 2017. [DOI: 10.1177/1934578x1701201007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Phytochemical investigation of the methanol extract of the bark of Cryptomeria japonica has led to the isolation of two new abietane-type diterpenoids, 7a-(2’-butoxyethoxy)deoxocryptojaponol (1) and 7p-(2’-butoxyethoxy)deoxocryptojaponol (2). Their structures were established by means of 1D and 2D NMR spectra and HR-EI-MS, as well as on comparison with the reported data.
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Ko HH, Chang CC, Lin CH, Kuo YH, Chen IS, Chang HS. Bioactive chemical constituents isolated from the root of Neolitsea acuminatissima. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Chang HS, Wang CS, Lin CH, Chen IS, Chen YF. Chemical constituents and cytotoxic activities from the root of Cryptocarya concinna. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Wu HC, Chen JT, Fan YH, Yen CH, Chen YM, Chang HS. Secondary metabolites from Excoecaria formosana and their anti-hepatocellular carcinoma activity. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Huang HK, Cheng TL, Lin CH, Wu HC, Chen IS, Gan KH, Chang HS. Anti-Escherichia coli β-glucuronidase activity constituents from the root of Neolitsea konishii. Am J Transl Res 2017. [DOI: 10.1055/s-0037-1608150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Yang CW, Chang HY, Hsu HY, Lee YZ, Chang HS, Chen IS, Lee SJ. Identification of anti-viral activity of the cardenolides, Na +/K +-ATPase inhibitors, against porcine transmissible gastroenteritis virus. Toxicol Appl Pharmacol 2017; 332:129-137. [PMID: 28438630 PMCID: PMC7103123 DOI: 10.1016/j.taap.2017.04.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 03/17/2017] [Accepted: 04/17/2017] [Indexed: 01/06/2023]
Abstract
A series of naturally occurring cardenolides that exhibit potent anti-transmissible gastroenteritis virus (TGEV) activity in swine testicular (ST) cells has been identified. In an immunofluorescence assay, these cardenolides were found to diminish the expressions of TGEV nucleocapsid and spike protein, which was used as an indication for viral replication; block TGEV infection induced apoptosis and cytopathic effects; and impart the same trend of inhibitory activity against Na+/K+-ATPase as for anti-TGEV activity. The viral titer inhibition was found to take place in a dose-dependent manner. Knocking down expression of Na+/K+-ATPase, the cellular receptor of cardenolides, in ST cells was found to significantly impair the susceptibility of ST cells to TGEV infectivity. Thus, we have identified Na+/K+-ATPase as an anti-viral drug target and its antagonists, cardenolides, a novel class of anti- TGEV agents.
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Chang HS, Lin CH, Hsiao PY, Peng HT, Lee SJ, Cheng MJ, Chen IS. Bioactive composition of Reevesia formosana root and stem with cytotoxic activity potential. RSC Adv 2017. [DOI: 10.1039/c7ra04255h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Three lignanoids and three terpenoids, along with 40 known compounds were isolated from Reevesia formosana.
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Cheng YH, Chen IS, Lin YC, Tung CW, Chang HS, Wang CC. Attenuation of antigen-specific T helper 1 immunity by Neolitsea hiiranensis and its derived terpenoids. PeerJ 2016; 4:e2758. [PMID: 28344896 PMCID: PMC5363408 DOI: 10.7717/peerj.2758] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 11/04/2016] [Indexed: 01/10/2023] Open
Abstract
Background T cells play a pivotal role in the adaptive immunity that participates in a wide range of immune responses through a complicated cytokine network. Imbalance of T-cell responses is involved in several immune disorders. Neolitsea species, one of the biggest genera in the family Lauraceae, have been employed widely as folk medicines for a long time in Asia. Previous phytochemical investigations revealed the abundance of terpenes in the leaves of N. hiiranensis, an endemic Neolitsea in Taiwan, and demonstrated anti-inflammatory activities. However, the effect of N. hiiranensis on the functionality of immune cells, especially T cells, is still unclear. In this study, we utilize in vitro and in vivo approaches to characterize the effects of leaves of N. hiiranensis and its terpenoids on adaptive immune responses. Methods Dried leaves of N. hiiranensis were extracted three times with cold methanol to prepare crude extracts and to isolate its secondary metabolites. The ovalbumin (OVA)-sensitized BALB/c mice were administrated with N. hiiranensis extracts (5–20 mg/kg). The serum and splenocytes of treated mice were collected to evaluate the immunomodulatory effects of N. hiiranensis on the production of OVA-specific antibodies and cytokines. To further identify the N. hiiranensis-derived compounds with immunomodulatory potentials, OVA-primed splenocytes were treated with compounds isolated from N. hiiranensis by determining the cell viability, cytokine productions, and mRNA expression in the presence of OVA in vitro. Results Crude extracts of leaves of N. hiiranensis significantly inhibited IL-12, IFN-γ, and IL-2 cytokine productions as well as the serum levels of antigen-specific IgM and IgG2ain vivo. Two of fourteen selected terpenoids and one diterpenoid derived from the leaves of N. hiiranensis suppressed IFN-γ in vitro. In addition, β-caryophyllene oxide attenuated the expression of IFN-γ, T-bet, and IL-12Rβ2 in a dose-dependent manner. N. hiiranensis-derived β-caryophyllene oxide inhibited several aspects of adaptive immune responses, including T-cell differentiation, IFN-γ production, and Th1-assocaited genes. Conclusion As IFN-γ is the key cytokine secreted by T helper-1 cells and plays a pivotal role in Th1 immune responses, our results suggested that the N. hiiranensis and its terpenoids may possess potential therapeutic effects on Th1-mediated immune disorders.
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Hsiao PY, Lee SJ, Chen IS, Hsu HY, Chang HS. Cytotoxic cardenolides and sesquiterpenoids from the fruits of Reevesia formosana. PHYTOCHEMISTRY 2016; 130:282-290. [PMID: 27386738 DOI: 10.1016/j.phytochem.2016.06.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 06/09/2016] [Accepted: 06/23/2016] [Indexed: 06/06/2023]
Abstract
Bioassay-guided fractionation of the fruits of Reevesia formosana led to isolation of three cardenolides (reevesioside J, reevesioside K, and epi-reevesioside K), three sesquiterpenoids (reevesiterpenol C, reevesiterpenol D, and reevesiterpenol E), and two glycosides (reevesianin A and reevesianin B), along with 46 known compounds. Their structures were determined using spectroscopic techniques. In addition to the reported cytotoxic cardenolides, reevesioside J and strophanthidin exhibited moderate cytotoxicity against the cell lines MCF-7, NCI-H460, and HepG2, with IC50 values of 0.39 ± 0.06 μM and 1.06 ± 0.12 μM for MCF-7, 0.12 ± 0.01 μM and 0.29 ± 0.01 μM for NCI-H460, and 1.09 ± 0.02 μM and 1.72 ± 0.02 μM for HepG2, respectively. Reevesiterpenol E also exhibited the best selective cytotoxicity to the NCI-H460 cell line, with an IC50 value of 3.15 ± 0.22 μM.
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Huang CI, Chang HS, Lin CH, Chen IS. Terpene Alkaloid Glucosides and Apocarotenoids from Symplocos anomala. Chem Nat Compd 2016. [DOI: 10.1007/s10600-016-1710-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Chang CI, Chen CC, Chao CY, Wang SY, Chang HS, Sung PJ, Huang GJ, Li YC, Kuo YH. Sesquiterpenoids and Diterpenoids from the Wood of Cunninghamia konishii and Their Inhibitory Activities against NO Production. Molecules 2016; 21:490. [PMID: 27089309 PMCID: PMC6273599 DOI: 10.3390/molecules21040490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Revised: 04/06/2016] [Accepted: 04/07/2016] [Indexed: 11/16/2022] Open
Abstract
Three new sesquiterpenoids, 2α-hydroxy-3,3,6α,9β-tetramethyltricyclo[4,3,2(1,4)]undecane (1), 11-acetoxyeudesman-4β-ol (4), and 2α,3β-dihydroxy-4β-methyl-6,8,10-cadinatriene (6), four known sesquiterpenoids (2, 3, 5, and 7), together with eight known diterpenoids (8-15), were isolated from the wood of Cunninghamia konishii. Their structures were determined by detailed analysis of spectroscopic data and comparison with the data of known analogues. Four sesquiterpenoids (1, 4, 5, and 6) and all the diterpenoids (8-15) were evaluated for inhibition of nitric oxide production in lipopolysaccharides (LPS)-activated RAW 264.7 macrophages and the results showed that compounds 10 and 15 exhibited moderate inhibitory activities against nitric oxide production.
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Chang HS, Chen IS. Chemical constituents and bioactivity of Formosan lauraceous plants. J Food Drug Anal 2016; 24:247-263. [PMID: 28911577 PMCID: PMC9339549 DOI: 10.1016/j.jfda.2015.10.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 09/10/2015] [Accepted: 10/13/2015] [Indexed: 01/12/2023] Open
Abstract
Taiwan is rich in lauraceous plants. A review of 197 references based on the chemical analysis and bioactivity of indigenous lauraceous plants carried out by native scientists from 1963 to 2014 has been compiled. About 303 new compounds and thousands of known compounds comprising alkaloids and non-alkaloids with diverse structures have been isolated or identified from indigenous plants belonging to the 11 lauraceous genera. The volatile components, however, have been excluded from this review. This review provides an overview of the past efforts of Taiwan scientists working on secondary metabolites and their bioactivity in native lauraceous plants. The potential of lauraceous plants worthy of further study is also noted. The contents will be helpful for the chemotaxonomy of Lauraceae and be of value for the development of native Formosan lauraceous plants.
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Chang HS, Tang JY, Yen CY, Huang HW, Wu CY, Chung YA, Wang HR, Chen IS, Huang MY, Chang HW. Antiproliferation of Cryptocarya concinna-derived cryptocaryone against oral cancer cells involving apoptosis, oxidative stress, and DNA damage. Altern Ther Health Med 2016; 16:94. [PMID: 26955958 PMCID: PMC4784356 DOI: 10.1186/s12906-016-1073-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 03/02/2016] [Indexed: 12/20/2022]
Abstract
Background Cryptocarya-derived crude extracts and their compounds have been reported to have an antiproliferation effect on several types of cancers but their impact on oral cancer is less well understood. Methods We examined the cell proliferation effect and mechanism of C. concinna-derived cryptocaryone (CPC) on oral cancer cells in terms of cell viability, apoptosis, reactive oxygen species (ROS), mitochondrial depolarization, and DNA damage. Results We found that CPC dose-responsively reduced cell viability of two types of oral cancer cells (Ca9-22 and CAL 27) in MTS assay. The CPC-induced dose-responsive apoptosis effects on Ca9-22 cells were confirmed by flow cytometry-based sub-G1 accumulation, annexin V staining, and pancaspase analyses. For oral cancer Ca9-22 cells, CPC also induced oxidative stress responses in terms of ROS generation and mitochondrial depolarization. Moreover, γH2AX flow cytometry showed DNA damage in CPC-treated Ca9-22 cells. CPC-induced cell responses in terms of cell viability, apoptosis, oxidative stress, and DNA damage were rescued by N-acetylcysteine pretreatment, suggesting that oxidative stress plays an important role in CPC-induced death of oral cancer cells. Conclusions CPC is a potential ROS-mediated natural product for anti-oral cancer therapy. Electronic supplementary material The online version of this article (doi:10.1186/s12906-016-1073-5) contains supplementary material, which is available to authorized users.
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Chang HW, Tang JY, Yen CY, Chang HS, Huang HW, Chung YA, Chen IS, Huang MY. Synergistic anti-oral cancer effects of UVC and methanolic extracts of Cryptocarya concinna roots via apoptosis, oxidative stress and DNA damage. Int J Radiat Biol 2016; 92:263-72. [PMID: 26887975 DOI: 10.3109/09553002.2016.1145753] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Purpose Radiation combined with natural products may improve the radiosensitivity of cancer cells. This study investigated the potential of a combined modality treatment with Ultraviolet C (UVC; wavelength range 200-280 nm) and our previously identified anti-oral cancer agent (methanolic extracts of Cryptocarya concinna roots; MECCrt) in oral cancer cells. Materials and methods The mechanism of the possible synergy of UVC and MECCrt was explored in terms of cell viability, cell cycle, apoptosis, reactive oxygen species (ROS), mitochondrial membrane potential (MitoMP), and DNA damage analyses. Results In cell viability (%) at 24 h treatment, the low doses of UVC (14 J/m(2)) and MECCrt (10 μg/ml) resulted in slight damage to human oral cancer Ca9-22 cells (83.2 and 80.4) but was less harmful to human oral normal HGF-1 cells (93.4 and 91.8, respectively). The combined treatment of UVC and MECCrt (UVC/MECCrt) had a lower viability (54.5%) than UVC or MECCrt alone in Ca9-22 cells but no showed significant change in HGF-1 cells. In Ca9-22 cells, the expression of flow cytometry-based apoptosis (sub-G1 phase, annexin V, and pancaspase assays) was significantly higher in UVC/MECCrt than in UVC or MECCrt alone (p < 0.0001). Using flow cytometry, intracellular ROS levels of UVC/MECCrt and MECCrt alone were higher than for UVC alone. MitoMP change and H2A histone family member X (γH2AX; H2AFX)-based DNA damage were synergistically inhibited and induced by MECCrt/UVC compared to its single treatment in Ca9-22 cells, respectively. Conclusion UVC plus MECCrt treatment had selective killing and synergistic anti-proliferative effects against oral cancer cells involving apoptosis, oxidative stress, and DNA damage. This combination therapy appears to have a great clinical potential against oral cancer cells.
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Lee YZ, Yang CW, Chang HY, Hsu HY, Chen IS, Chang HS, Lee CH, Lee JC, Kumar CR, Qiu YQ, Chao YS, Lee SJ. Discovery of selective inhibitors of Glutaminase-2, which inhibit mTORC1, activate autophagy and inhibit proliferation in cancer cells. Oncotarget 2015; 5:6087-101. [PMID: 25026281 PMCID: PMC4171615 DOI: 10.18632/oncotarget.2173] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Glutaminase, which converts glutamine to glutamate, is involved in Warburg effect in cancer cells. Two human glutaminase genes have been identified, GLS (GLS1) and GLS2. Two alternative transcripts arise from each glutaminase gene: first, the kidney isoform (KGA) and glutaminase C (GAC) for GLS; and, second, the liver isoform (LGA) and glutaminase B (GAB) for GLS2. While GLS1 is considered as a cancer therapeutic target, the potential role of GLS2 in cancer remains unclear. Here, we discovered a series of alkyl benzoquinones that preferentially inhibit glutaminase B isoform (GAB, GLS2) rather than the kidney isoform of glutaminase (KGA, GLS1). We identified amino acid residues in an allosteric binding pocket responsible for the selectivity. Treatment with the alkyl benzoquinones decreased intracellular glutaminase activity and glutamate levels. GLS2 inhibition by either alkyl benzoquinones or GLS2 siRNA reduced carcinoma cell proliferation and anchorage-independent colony formation, and induced autophagy via AMPK mediated mTORC1 inhibition. Our findings demonstrate amino acid sequences for selective inhibition of glutaminase isozymes and validate GLS2 as a potential anti-cancer target.
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Chen YS, Cheng MJ, Hsiao Y, Chan HY, Hsieh SY, Chang CW, Liu TW, Chang HS, Chen IS. Chemical Constituents of the Endophytic FungusHypoxylonsp. 12F0687 Isolated from TaiwaneseIlex formosana. Helv Chim Acta 2015. [DOI: 10.1002/hlca.201500048] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Hsiao Y, Cheng MJ, Chang HS, Wu MD, Hsieh SY, Liu TW, Lin CH, Yuan GF, Chen IS. Six new metabolites produced byColletotrichum aotearoa09F0161, an endophytic fungus isolated fromBredia oldhamii. Nat Prod Res 2015; 30:251-8. [DOI: 10.1080/14786419.2015.1054285] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Lin SY, Ko HH, Lee SJ, Chang HS, Lin CH, Chen IS. Biological evaluation of secondary metabolites from the root of Machilus obovatifolia. Chem Biodivers 2015; 12:1057-67. [PMID: 26172326 DOI: 10.1002/cbdv.201400196] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Indexed: 01/01/2023]
Abstract
Bioassay-guided fractionation of the root of Machilus obovatifolia led to the isolation of four new lignans, epihenricine B (1), threo-(7'R,8'R) and threo-(7'S,8'S)-methylmachilusol D (2 and 3), and isofragransol A (4), along with 23 known compounds. The compounds were obtained as isomeric mixtures (i.e., 2/3 and 4/20, resp.). The structures were elucidated by spectral analyses. Among the isolates, 1, licarin A (12), guaiacin (14), (±)-syringaresinol (21), and (-)-epicatechin (23) showed ABTS (=2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) cation radical-scavenging activity, with SC50 values of 11.7±0.5, 12.3±1.1, 11.0±0.1, 10.6±0.3, and 9.5±0.2 μM in 20 min, respectively. In addition, kachirachirol B (17) showed cytotoxicity against the NCI-H460 cell line with an IC50 value of 3.1 μg/ml.
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Lee TH, Lee MS, Ko HH, Chen JJ, Chang HS, Tseng MH, Wang SY, Chen CC, Kuo YH. New Furanone and Sesquiterpene from the Pericarp of Calocedrus formosana. Nat Prod Commun 2015. [DOI: 10.1177/1934578x1501000611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
One new γ-lactone, namely calolactone (1), together with one new drimane-type sesquiterpene, namely caloterpene (2), were isolated from the pericarp of Calocedrus formosana Florin. Their structures were elucidated by spectroscopic and mass spectrometric analysis.
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Takami H, Burbelo PD, Fukuda K, Chang HS, Phillips SL, Yamada Y. Molecular organization and gene regulation of type IV collagen. CONTRIBUTIONS TO NEPHROLOGY 2015; 107:36-46. [PMID: 8004973 DOI: 10.1159/000422959] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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