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Fitoterapia

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https://www.readbyqxmd.com/read/28408269/chlorajaponols-a-f-sesquiterpenoids-from-chloranthus-japonicus-and-their-in-vitro-anti-inflammatory-and-anti-tumor-activities
#1
Zhi-Guo Zhuo, Guo-Zhen Wu, Xin Fang, Xin-Hui Tian, Hong-Yuan Dong, Xi-Ke Xu, Hui-Liang Li, Ning Xie, Wei-Dong Zhang, Yun-Heng Shen
Two new eudesmane sesquiterpenoids, chlorajaponols A-B (1-2), two new guaiane sesquiterpenoids, chlorajaponols C-D (3-4), a new germacrane sesquiterpenoid, chlorajaponol E (5), and a new lindenane sesquiterpenoid, chlorajaponol F (6), along with 8 known sesquiterpenoids and 6 known disesquiterpenoids, were isolated from the whole plant of Chloranthus japonicus. Their structures were established by extensive analysis of NMR spectroscopic data in combination with mass spectrometry. The structures of compounds 1-4 were confirmed by single crystal X-ray diffraction (CuKα radiation)...
April 10, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28408268/chemical-constituents-from-the-whole-plants-of-pilea-cavaleriei-levl-subsp-cavaleriei
#2
Yong Zhou, Ling-Yu Li, Heng-Chun Ren, Ri-Dong Qin, Qin Li, Peng-Fei Tu, Gui-Fang Dou, Qing-Ying Zhang, Hong Liang
Three new sesquiterpene glycosides (1-3), three new glycerol glycosides (4-6), two new alkaloids (7-8), together with seven known compounds (9-15) all of which were isolated from the genus Pilea for the first time, were isolated from the whole plants of Pilea cavaleriei Levl subsp. cavaleriei. Their structures were determined by extensive spectroscopic techniques and chemical methods. The cytotoxic activity of the isolated compounds was evaluated against four cancer cell lines, and none of the tested compounds caused a significant reduction of the cell number...
April 10, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28400224/new-amides-from-seeds-of-silybum-marianum-with-potential-antioxidant-and-antidiabetic-activities
#3
Ning-Bo Qin, Cui-Cui Jia, Jun Xu, Da-Hong Li, Fan-Xing Xu, Jiao Bai, Zhan-Lin Li, Hui-Ming Hua
Two new amide compounds, mariamides A and B (1-2), were obtained together with fourteen known compounds from the seeds of milk thistle (Silybum marianum). Their structures were established on the basis of extensive 1D and 2D NMR analyses, as well as HR-ESI-MS data. Most of the compounds showed significant antioxidant activities than positive control in ABTS and FRAP assays. However, only amide compounds 1-4 showed moderate DPPH radical scavenging activity and compounds 7 and 16 showed the most potent activity against DPPH...
April 8, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28392270/new-ursane-type-triterpenoids-from-clerodendranthus-spicatus
#4
Yong Luo, Li-Zhi Cheng, Qi Luo, Yong-Ming Yan, Shu-Mei Wang, Qin Sun, Yong-Xian Cheng
Five new ursane-type triterpenoids, spicatusoids A-E (1, 3-6), and three known ones (2, 7, and 8), and a known oleanane-type triterpenoid (9) were isolated from the aerial parts of Clerodendranthus spicatus. Their structures were elucidated by spectroscopic methods. In particular, the structure of 3 including its absolute configuration was confirmed by single-crystal X-ray diffraction analysis. Cell viability of all the compounds against rat kidney fibroblast cells (NRK-49F) with or without TGF-β1 induction and human cancer cells (HL-60, SMMC-7721, A-549, MCF-7, and SW-480) was examined by using MTT or MST assays...
April 7, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28392269/chemotaxonomic-and-biosynthetic-relationships-between-flavonolignans-produced-by-silybum-marianum-populations
#5
Sameh F AbouZid, Hayam S Ahmed, Abeer S Moawad, Asmaa I Owis, Shao-Nong Chen, Amandine Nachtergael, James B McAlpine, J Brent Friesen, Guido F Pauli
Flavonolignans constitute an important class of plant secondary metabolites formed by oxidative coupling of one flavonoid and one phenylpropanoid moiety. The standardized flavonolignan-rich extract prepared from the fruits of Silybum marianum is known as silymarin and has long been used medicinally, prominently as an antihepatotoxic and as a chemopreventive agent. Principal component analysis of the variation in flavonolignan content in S. marianum samples collected from different locations in Egypt revealed biosynthetic relationships between the flavonolignans...
April 6, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28392268/antibacterial-secondary-metabolites-from-an-endophytic-fungus-fusarium-solani-jk10
#6
James Oppong Kyekyeku, Souvik Kusari, Reimmel Kwame Adosraku, Anke Bullach, Christopher Golz, Carsten Strohmann, Michael Spiteller
Extensive chemical investigation of the endophytic fungus, Fusarium solani JK10, harbored in the root of the Ghanaian medicinal plant Chlorophora regia, using the OSMAC (One Strain Many Compounds) approach resulted in the isolation of seven new 7-desmethyl fusarin C derivatives (1-7), together with five known compounds (8-12). The structures of the new compounds were elucidated by analysis of their spectroscopic data including 1D, 2D NMR, HRESI-MS(n) and IR data. The relative configuration of compounds 1/2 was deduced by comparison of their experimental electronic circular dichroism (ECD) and optical rotation data with those reported in literature...
April 6, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28390975/natural-isothiocyanates-express-antimicrobial-activity-against-developing-and-mature-biofilms-of-pseudomonas-aeruginosa
#7
Stefan J Kaiser, Nico T Mutters, Brigitte Blessing, Frank Günther
BACKGROUND: The antimicrobial properties of natural isothiocyanates (ITCs) found in plants such as nasturtium (Tropaeolum majus) and horseradish (Armoracia rusticana), and the need of new chemotherapeutic options for treatment of infections caused by multidrug-resistant and biofilm-forming Gram-negative bacteria such as Pseudomonas aeruginosa (Pa), led us to evaluate the effects of three major ITCs, allylisothiocyanate (AITC), benzylisothiocyanate (BITC), and phenylethyl-isothiocyanate (PEITC), and a mixture (ITCM) adapted to the ITC composition after release of active components out of natural sources...
April 5, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28390974/six-new-sesquiterpenoids-from-nardostachys-chinensis-batal
#8
Xiu-Yu Shen, Yang Yu, Guo-Dong Chen, Hua Zhou, Jin-Fang Luo, Yi-Han Zuo, Xin-Sheng Yao, Yi Dai
Six new sesquiterpenoids, namely nardosinanones J-N and nardoaristolone C, were isolated from the rhizomes and roots of Nardostachys chinensis Batal. Their structures were determined by interpretation of spectroscopic data (HR-ESI-MS, 1D and 2D NMR). A combination of X-ray crystal diffraction, ECD calculation, and Mosher ester methods was employed to determine the absolute configuration of the isolated compounds. Compounds 1-2, 4-6 were evaluated anti-inflammatory activities in LPS-stimulated RAW264.7 macrophages...
April 5, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28390973/neolignans-and-serratane-triterpenoids-with-inhibitory-effects-on-xanthine-oxidase-from-palhinhaea-cernua
#9
Jing Li, Ping-Sheng Xu, Lei-Hong Tan, Zhen-Xing Zou, Yi-Kun Wang, Hong-Ping Long, Gan Zhou, Guang Li, Kang-Ping Xu, Gui-Shan Tan
Three new neolignans, lycocernuasides B-D (1-3), three new serratane triterpenoids, lycernuic ketones D (8) and E (9), and lycernuic A (10), together with six known compounds, were isolated from the 75% aqueous EtOH extract of Palhinhaea cernua. Their structures and absolute configurations were established primarily by NMR, HRESIMS and circular dichroism (CD). All compounds were evaluated the inhibitory activities of xanthine oxidase. Compounds 1-3 displayed moderate inhibitory effects on xanthine oxidase with IC50 values of 30...
April 5, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28389278/prenylated-flavonoids-from-the-stems-and-roots-of-tripterygium-wilfordii
#10
Yang Chen, Jianping Zhao, Yixing Qiu, Hanwen Yuan, Shabana I Khan, Nusrat Hussain, M Iqbal Choudhary, Feng Zeng, De-An Guo, Ikhlas A Khan, Wei Wang
Phytochemical investigation on the stems and roots of Tripterygium wilfordii led to the isolation and characterization of three new prenylated flavanones, tripteryols A-C (1-3), along with (±)-5,4'-dihydroxy-2'-methoxy-6',6″-dimethypyraro-(2″,3″:7,8)-6-methyflavanone (4), and ((2S)-5,7,4'-trihydroxy-2'-methoxy-8,5'-di(3-methyl-2-butenyl)-6-methylflavanone (5). Structures of the compounds 1-5 were elucidated using spectroscopic techniques, such as UV, IR, NMR (1D and 2D), and HRESI-MS. Tripteryols B (2) was found active in the antimicrobial assay against Cryptococcus neoformans, Pseudomonas aeruginosa, vancomycin-resistant Enterococcus faecalis (VRE) and methicillin-resistant Staphylococcus aureus (MRSA) with IC50 values in the range of 2...
April 5, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28385670/spatial-profiling-of-maytansine-during-the-germination-process-of-maytenus-senegalensis-seeds
#11
Dennis Eckelmann, Souvik Kusari, Michael Spiteller
The ecological role of maytansine, an important antineoplastic and antimicrobial compound with high cytotoxicity, particularly as a chemical defense compound has remained elusive since its discovery in the 1970s in Maytenus and Putterlickia plants. In the present study, we have used MALDI-imaging-HRMS to visualize the occurrence as well as spatial and temporal distribution of maytansine in a Maytenus senegalensis plant, seeds obtained from the mother plant during seeding stage, through the germination of the seeds, and finally up to the establishment of seedlings (or daughter plants)...
April 3, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28373010/ecdysterones-from-rhaponticum-carthamoides-willd-iljin-reduce-hippocampal-excitotoxic-cell-loss-and-upregulate-mtor-signaling-in-rats
#12
Jiming Wu, Le Gao, Lei Shang, Guihua Wang, Nana Wei, Tiantian Chu, Suping Chen, Yujun Zhang, Jian Huang, Jinhui Wang, Ruichao Lin
Glutamate-induced excitotoxicity is a key pathological mechanism in many neurological disease states. Ecdysterones derived from Rhaponticum carthamoides (Willd.) Iljin (RCI) have been shown to alleviate glutamate-induced neuronal damage; although their mechanism of action is unclear, some data suggest that they enhance signaling in the mechanistic target of rapamycin (mTOR) signaling pathway. This study sought to elucidate the mechanisms underlying ecdysterone-mediated neuroprotection. We used in silico target prediction and simulation methods to identify putative ecdysterone binding targets, and to specifically identify those that represent nodes where several neurodegenerative diseases converge...
March 31, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28363507/a-new-cineol-derivative-polyphenols-and-norterpenoids-from-saharan-myrtle-tea-myrtus-nivellei-isolation-structure-determination-quantitative-determination-and-antioxidant-activity
#13
Amira Mansour, Rita Celano, Teresa Mencherini, Patrizia Picerno, Anna Lisa Piccinelli, Yazid Foudil-Cherif, Dezső Csupor, Ghania Rahili, Nassima Yahi, Seyed Mohammad Nabavi, Rita Patrizia Aquino, Luca Rastrelli
The phytochemical profile of decoction and infusion, obtained from the dried leaves of M. nivellei, consumed as tea in Saharan region, was characterized by UHPLC-PDA-HRMS. Fourteen compounds were characterized and, to confirm the proposed structures a preparative procedure followed by NMR spectroscopy was applied. Compound 3 (2-hydroxy-1,8-cineole disaccharide) was a never reported whereas a bicyclic monoterpenoid glucoside (2), two ionol glucosides (1 and 12), a tri-galloylquinic acid (4), two flavonol glycosides (5 and 9), and a tetra-galloylglucose (7), were reported in Myrtus spp...
March 28, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28363506/three-novel-indole-alkaloids-from-kopsia-officinalis
#14
Zhi-Wei Wang, Xiao-Jian Shi, Yan Mu, Lei Fang, Yue Chen, Yun-Liang Lin
Three new indole alkaloids, named kopsioffines A-C (1-3), possessing relatively novel ten-membered lactam ring, and one known compound (11,12-demethoxy-16-deoxypauciflorine, 4) were isolated from the leaves and stems of Kopsia officinalis. Their structures were elucidated by means of spectroscopic methods. The absolute configuration of 1 was determined by calculated electronic circular dichroism data. The hypothetical biosynthetic pathway of 1 was postulated. All these isolates were evaluated for their inhibitory effects on α-glucosidase...
March 28, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28351723/scubatines-a-f-new-cytotoxic-neo-clerodane-diterpenoids-from-scutellaria-barbata-d-don
#15
Qing-Qing Yuan, Wei-Bin Song, Wen-Qiong Wang, Li-Jiang Xuan
Phytochemical investigation of the 70% acetone extract of the whole plant of Scutellaria barbata D. Don afforded six new neo-clerodane diterpenoids, scubatines A-F (1-6), and four known analogues (7-10). Their structures were elucidated on the basis of extensive spectroscopic analyses. Cytotoxic activity against the HL-60 and A549 cell lines was assessed for all isolated compounds. Compound 9 exhibited moderate activity against HL-60 with an IC50 value of 5.6μM. Compound 6 showed weak cytotoxic activity against A549 and HL-60 with IC50 values of 10...
March 27, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28351722/a-novel-method-for-synthesis-of-%C3%AE-spinasterol-and-its-antibacterial-activities-in-combination-with-ceftiofur
#16
Xiaomin Yang, Jianyu Zhou, Tao Wang, Ling Zhao, Gang Ye, Fei Shi, Yinglun Li, Huaqiao Tang, Qi Dong, Xuerong Zhou, Min Xu, Qian Rong, Helin Chen, Xiaoyu Yang, Yu Cai
In this study, we designed a novel method of the synthesis of α-spinasterol from commercially available stigmasterol and explored the combinational effect of the α-spinasterol with ceftiofur in vitro against S. pullorum cvcc533, S. pneumoniae CAU0070, E. coli, and S. aureus. α-Spinasterol was obtained by a key reaction of Bamford-Stevens reaction with a desirable yield for five steps. The combination of α-spinasterol and ceftiofur showed stronger synergetic effect against the four pathogenic strains compared with that of stigmasterol and ceftiofur alone...
March 25, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28344076/inhibition-of-human-cyp3a4-and-cyp3a5-enzymes-by-gomisin-c-and-gomisin-g-two-lignan-analogs-derived-from-schisandra-chinensis
#17
Jin Zhao, Tao Sun, Jing-Jing Wu, Yun-Feng Cao, Zhong-Ze Fang, Hong-Zhi Sun, Zhi-Tu Zhu, Kun Yang, Yong-Zhe Liu, Frank J Gonzalez, Jun Yin
Gomisin C (GC) and gomisin G (GG) are two lignan analogs isolated from the Traditional Chinese Medicine Schisandra chinensis which possesses multiple pharmacological activities. However, the potential herb-drug interactions (HDI) between these lignans and other drugs through inhibiting human cytochrome P450 3A4 (CYP3A4) and CYP3A5 remains unclear. In the present study, the inhibitory action of GC and GG on CYP3A4 and CYP3A5 were investigated. The results demonstrated that both GC and GG strongly inhibited CYP3A-mediated midazolam 1'-hydroxylation, nifedipine oxidation and testosterone 6β-hydroxylation...
March 24, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28300703/highly-oxygenated-lanostane-type-triterpenoids-and-their-bioactivity-from-the-fruiting-body-of-ganoderma-gibbosum
#18
De-Bing Pu, Xi Zheng, Jun-Bo Gao, Xing-Jie Zhang, Yan Qi, Xiao-Si Li, Yong-Mei Wang, Xiao-Nian Li, Xiao-Li Li, Chun-Ping Wan, Wei-Lie Xiao
Eight new highly oxygenated lanostane triterpenes, gibbosic acids A-H (1-8), along with three known ones (9-11), were isolated from the fruiting body of Ganoderma gibbosum. The structures of new isolates were assigned by NMR and HRESIMS experiments. The absolute configurations of 1 were further confirmed by single crystal X-ray diffraction data and computational ECD methods. Immunoregulatory effect and anti-inflammatory activities of these compounds were screened in murine lymphocyte proliferation assay and in lipopolysaccharide (LPS)-stimulated RAW-264...
March 11, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28300702/four-new-bi-2-2-phenylethyl-chromone-derivatives-of-agarwood-from-aquilaria-crassna
#19
Yang Yang, Wen-Li Mei, Fan-Dong Kong, Hui-Qin Chen, Wei Li, Zhi-Bao Chen, Hao-Fu Dai
Four new bi-2-(2-phenylethyl)chromone derivatives, crassins A-D (1-4), were isolated from the EtOAc extract of agarwood originating from Aquilaria crassna. The structures including the absolute configurations of compounds were unambiguously elucidated by extensive spectroscopic methods (1D and 2D NMR, UV, ECD, IR, MS), and by comparison with the literature. The isolated compounds were tested for their acetylcholinesterase (AChE) and α-glucosidase inhibitory activities, as well as cytotoxic activities. All the compounds showed weak inhibitory activity against AChE, while compounds 3 and 4 also displayed weak cytotoxicity against human myeloid leukemia cell line (K562)...
March 11, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28322990/xanthones-from-the-twigs-of-garcinia-oblongifolia-and-their-antidiabetic-activity
#20
Binh T D Trinh, Tam T T Quach, Dung N Bui, Dan Staerk, Lien-Hoa D Nguyen, Anna K Jäger
Three new xanthones, oblongixanthone F-H (1-3), along with eight known xanthones (4-11), were isolated from an EtOAc extract of the twigs of Garcinia oblongifolia. Their structures were elucidated by spectroscopic analysis including 1D- and 2D-NMR spectroscopy and mass spectrometry. The antidiabetic effects of all isolated compounds were evaluated by in vitro α-glucosidase and PTP1B inhibition assays. Compound 11 was the most active compound, and inhibited α-glucosidase and PTP1B with IC50 values of 1.7±0...
April 2017: Fitoterapia
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