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Fitoterapia

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https://www.readbyqxmd.com/read/27908800/sauruchinenols-a-and-b-unprecedented-monocyclic-diterpenes-with-new-carbon-skeleton-from-the-aerial-parts-of-saururus-chinensis
#1
Xiu Gao, Juan He, Xing-De Wu, Li-Yan Peng, Li-Dong Shao, Yan Li, Xiao Cheng, Qin-Shi Zhao
Sauruchinenols A (1) and B (2), two novel monocyclic diterpenes with unique carbon skeleton, as well as two new structurally related diterpenes, sauruchinenols C (3) and D (4), were isolated from the aerial part of Saururus chinensis. Their structures were elucidated based on the analysis of spectroscopic data. A hypothetical biogenetic pathway for sauruchinenols A and B was proposed.
November 28, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27908799/isolation-of-novel-stilbenoids-from-the-roots-of-cyrtopodium-paniculatum-orchidaceae
#2
Florence Auberon, Opeyemi Joshua Olatunji, Diamondra Raminoson, Christian D Muller, Beatriz Soengas, Frédéric Bonté, Annelise Lobstein
Four new stilbenoids, named cyrtopodinone (1), cyrtopodinol (2), and coeludols A and B (3-4) were isolated from the roots of Cyrtopodium paniculatum, together with 21 known stilbenoids derivatives (5-25). Their structures were elucidated by comprehensive spectroscopic analysis including extensive 1D and 2D-NMR techniques. The cytotoxic activities of the isolated compounds were tested on human glioblastoma U-87MG cell line with fluorescence-based image cytometry. Only four compounds (18, 19, 22 and 25) displayed moderate cytotoxicity with IC50 values of 45...
November 28, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27894905/racemic-alkaloids-from-the-fungus-ganoderma-cochlear
#3
Xin-Long Wang, Man Dou, Qi Luo, Li-Zhi Cheng, Yong-Ming Yan, Rong-Tao Li, Yong-Xian Cheng
Seven pairs of new alkaloid enantiomers, ganocochlearines C-I (1, 3-8), and three pairs of known alkaloids were isolated from the fruiting bodies of Ganoderma cochlear. The chemical structures of new compounds were elucidated on the basis of 1D and 2D NMR data. The absolute configurations of compounds 1, 3-10 were assigned by ECD calculations. Biological activities of these isolates against renal fibrosis were accessed in rat normal or diseased renal interstitial fibroblast cells. Importantly, the plausible biosynthetic pathway for this class of alkaloids was originally proposed...
November 25, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27890794/target-regulation-of-pi3k-akt-mtor-pathway-by-cannabidiol-in-treatment-of-experimental-multiple-sclerosis
#4
Sabrina Giacoppo, Federica Pollastro, Gianpaolo Grassi, Placido Bramanti, Emanuela Mazzon
This study was aimed to investigate whether treatment with purified cannabidiol (CBD) may counteract the development of experimental multiple sclerosis (MS), by targeting the PI3K/Akt/mTOR pathway. Although the PI3K/Akt/mTOR pathway was found to be activated by cannabinoids in several immune and non-immune cells, currently, there is no data about the effects of CBD in the PI3K/Akt/mTOR activity in MS. Experimental Autoimmune Encephalomyelitis (EAE), the most common model of MS, was induced in C57BL/6 mice by immunization with myelin oligodendroglial glycoprotein peptide (MOG)35-55...
November 25, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27889541/new-monoterpenoid-oxindole-alkaloid-derivatives-from-the-stems-of-uncaria-hirsuta-havil-and-their-cytotoxicity-and-tandem-mass-spectrometric-fragmentation
#5
Hui-Qin Pan, Wen-Zhi Yang, Dan Zhao, Cheng Luo, Chang-Liang Yao, Xiao-Jian Shi, Yi-Bei Zhang, Shi-You Li, Ying Bi, Zhen Wang, Shuai Yao, Wan-Ying Wu, De-An Guo
Four new alkaloids, comprising three 3-oxo-3,7-seco-oxindole alkaloids (hirsutanine D-F, 1-3) and one oxindole alkaloid N-oxide (uncarine B N-oxide, 4), together with four known heteroyohimbine-type oxindole alkaloids, were isolated from the stems of Uncaria hirsuta Havil. Structures of 1-4 were elucidated by extensive NMR and HR-ESIMS data analyses. Compound 3 is the first 3-oxo-3,7-seco-oxindole alkaloid with ring B opened and degraded isolated from the Uncaria genus. Compounds 1-3 exhibited slight inhibition effect on the proliferation of the breast cancer cell MDA-MB-231...
November 24, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27889540/seladoeflavones-a-f-six-novel-flavonoids-from-selaginella-doederleinii
#6
ZhenXing Zou, KangPing Xu, PingSheng Xu, XiaoMin Li, Fei Cheng, Jing Li, Xia Yu, DongSheng Cao, Dan Li, Wei Zeng, GuoGang Zhang, GuiShan Tan
Six new flavonoids, seladoeflavones A-F (1-6), were isolated from the whole herbs of Selaginella doederleinii, together with one known flavonoid (7). Their structures including absolute configuration were characterized on the basis of extensive spectroscopic methods including NMR, HRMS, and electronic circular dichroism (ECD). All compounds consist of an aryl substituent at the C-3' position of naringenin or apigenin skeletons, and compounds 1 and 6 were identified as R configurations, which are uncommonly encountered in nature...
November 24, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27889542/a-glucosidase-inhibitors-extracted-from-the-roots-of-polygonum-multiflorum-thunb
#7
Jian-Bo Yang, Jin-Ying Tian, Zhong Dai, Fei Ye, Shuang-Cheng Ma, Ai-Guo Wang
A novel stilbene glucoside, polygonumnolide D (1), and a novel dianthrone glycoside, polygonumnolide E (2), were isolated from a 70% EtOH extract of the dried roots of Polygonum multiflorum Thunb., together with six known compounds (3-8). Their structures were elucidated by 1D and 2D NMR as well as mass spectroscopy data. The isolated compounds were evaluated for their a-glucosidase inhibitory activities in vitro. Compounds 1, 2 and 5 showed the inhibitory activity against a-glucosidase with the IC50 values of 2...
November 23, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27884571/inhibition-of-listeriolysin-o-oligomerization-by-lutein-prevents-listeria-monocytogenes-infection
#8
Bowen Liu, Zihao Teng, Jianfeng Wang, Gejin Lu, Xuming Deng, Li Li
The foodborne pathogenic bacterial species Listeria monocytogenes (L. monocytogenes) has caused incalculable damages to public health, and its successful infection requires various virulence factors, including Listeriolysin O (LLO). By forming pores in phagosomal membranes and even in some organelles, LLO plays an indispensable role in the ability of L. monocytogenes to escape from host immune attacks. Because of its critical role, LLO offers an appropriate therapeutic target against L. monocytogenes infection...
November 22, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27876600/antimicrobial-metabolites-from-the-plant-endophytic-fungus-penicillium-sp
#9
Ming-Hua Yang, Tian-Xiao Li, Ying Wang, Rui-Huan Liu, Jun Luo, Ling-Yi Kong
Five rare dichloro aromatic polyketides (1-5) were obtained from an endophytic fungus Penicillium sp., along with five known metabolites (6-10). Their structures were elucidated by extensive spectroscopic analysis, Mosher methods, as well as [Rh2(OCOCF3)4]-induced electronic circular dichroism (ECD) experiments. Compounds 2-4 and 6 structurally involved acyclic 1.3-diols, the uneasy configuration determinations of which were well carried out by double-derivation NMR methods. Compounds 1-10 were evaluated for their antibacterial and antifungal activities against five strains of human pathogenic microorganisms...
November 19, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27871974/anti-inflammatory-sesquiterpene-lactones-from-onopordum-illyricum-l-asteraceae-an-italian-medicinal-plant
#10
Carmen Formisano, Cinzia Sanna, Mauro Ballero, Giuseppina Chianese, Carmina Sirignano, Daniela Rigano, Estrella Millán, Eduardo Muñoz, Orazio Taglialatela-Scafati
Onopordum illyricum L. is a medicinal plant used in the Mediterranean area as antipyretic for the treatment of respiratory and urinary inflammations and to treat skin ulcers. Repeated chromatographic purification of O. illyricum aerial parts led to the isolation of six known sesquiterpenes, which were evaluated for the inhibition of the pro-inflammatory transcription factors NF-κB and STAT3 and for the activation of the transcription factor Nrf2, which regulates the cellular antioxidant response. Structure-activity relationships were interpreted by the NMR-based cysteamine assay...
November 19, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27876216/corrigendum-to-structural-elucidation-and-evaluation-of-multidrug-resistance-modulatory-capability-of-amarissinins-a-c-diterpenes-derived-from-salvia-amarissima-fitoterapia-114-2016-1-6
#11
Elihú Bautista, Mabel Fragoso-Serrano, Naytzé Ortiz-Pastrana, Rubén A Toscano, Alfredo Ortega
No abstract text is available yet for this article.
November 18, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27864138/sarniensine-a-mesembrine-type-alkaloid-isolated-from-nerine-sarniensis-an-indigenous-south-african-amaryllidaceae-with-larvicidal-and-adulticidal-activities-against-aedes-aegypti
#12
Marco Masi, Alet E van der Westhuyzen, Nurhayat Tabanca, Marco Evidente, Alessio Cimmino, Ivan R Green, Ulrich R Bernier, James J Becnel, Jeffrey R Bloomquist, Willem A L van Otterlo, Antonio Evidente
A new mesembrine-type alkaloid, named sarniensine, was isolated together with tazettine, lycorine, the main alkaloid, and 3-epimacronine from Nerine sarniensis, with the last two produced for the first time by this plant. This Amaryllidaceae, which is indigenous of South Africa, was investigated for its alkaloid content, because the organic extract of its bulbs showed strong larvicidal activity with an LC50 value of 0.008μgμL(-1) against first instar Aedes aegypti larvae and with an LD50 value 4.6μg/mosquito against adult female Ae...
November 15, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27847306/new-phenylpropanoid-substituted-flavan-3-ols-and-flavonols-from-the-leaves-of-uncaria-rhynchophylla
#13
Ruxin Li, Jintang Cheng, Mengjiao Jiao, Li Li, Cong Guo, Sha Chen, An Liu
Uncariols A (1) and B (2), two new phenylpropanoid-substituted flavan-3-ols, and (±)-uncariols C (3a/3b) and D (4a/4b), two pairs of new phenylpropanoid-substituted flavonol enantiomers, together with nine known compounds (5-13), were isolated from the leaves of Uncaria rhynchophylla. The structures of 1-4 were established primarily by NMR and HRESIMS experiments. The absolute configurations of the new ones were deduced via the circular dichroism (CD) and quantum chemical calculations of the electronic circular dichroic (ECD) spectra...
November 12, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27840284/triterpenoids-and-lignans-from-the-fruit-of-schisandra-sphenanthera
#14
Ye Liu, Yan-Mei Wang, Wen-Ming Wu, Jian Song, Han-Li Ruan
Three new (1-3) and seven known (4-10) triterpenoids, together with one new (11) and fifteen known (12-26) dibenzocyclooctadiene lignans, were isolated from the fruit of Schisandra sphenanthera Rehd. et Wils. Their structures were elucidated by extensive analysis of spectroscopic methods, including HRESIMS, 1D and 2D NMR spectra and CD experiments. All of the isolated triterpenoids (1-10) were evaluated for their in vitro cytotoxicities against HepG2 human hepatocellular carcinoma cell line, and compounds 1, 3-7 and 10 exhibited moderate antiproliferative effects against HepG2 cell line with IC50 ranging from 18...
November 10, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27838499/sasanquasaponin-induced-cardioprotection-involves-inhibition-of-mptp-opening-via-attenuating-intracellular-chloride-accumulation
#15
Yuan-Yuan Li, Lin Xiao, Ling-Yu Qiu, Yu-Feng Yan, Huan Wang, Guang-Ling Duan, Zhang-Ping Liao, He-Ping Chen
Sasanquasaponin (SQS) has been reported to elicit cardioprotection by suppressing hypoxia/reoxygenation (H/R)-induced elevation of intracellular chloride ion concentration ([Cl(-)]i). Given that the increased [Cl(-)]i is involved to modulate the mitochondrial permeability transition pore (mPTP), we herein sought to further investigate the role of mPTP in the cardioprotective effect of SQS on H/R injury. H9c2 cells were incubated for 24h with or without 10μM SQS followed by H/R. The involvement of mPTP was determined with a specific mPTP agonist atractyloside (ATR)...
November 10, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27838500/novel-anti-tumour-barringenol-like-triterpenoids-from-the-husks-of-xanthocerassorbifolia-bunge-and-their-three-dimensional-quantitative-structure-activity-relationships-analysis
#16
Da Wang, Dan Su, Bin Yu, Chuming Chen, Li Cheng, Xianzhe Li, Ronggang Xi, Huiyuan Gao, Xiaobo Wang
The high edible oil content of Xanthocerassorbifolia Bunge seeds contributes to its economic value. In this study, we analysed the barrigenol-like triterpenoids derived from X. sorbifolia husks. We also identified anti-tumour agents that could enhance the health benefits and medicinal value of X. sorbifolia. We isolated 10 barrigenol triterpenoids, including six new compounds (1-6) and four known compounds (7-10). New compounds 3 and 5 showed significant inhibitory activity against the proliferation of three human tumour cell lines, namely, HepG2, HCT-116 and U87-MG...
November 9, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27818319/chiral-separation-and-absolute-configurations-of-two-pairs-of-racemic-polyprenylated-benzophenones-from-hypericum-sampsonii
#17
Wen-Jing Tian, Yu-Qin Qiu, Hai-Feng Chen, Xiao-Jie Jin, Xiao-Jun Yao, Yi Dai, Xin-Sheng Yao
(±) Sampsonins A-B (1-2), two pairs of racemic polyprenylated benzophenones, were isolated from the aerial parts of Hypericum sampsonii and successfully separated by chiral HPLC column. Their structures were elucidated by spectroscopic analyses, X-ray diffraction analysis, and quantum chemical calculation of ECD method. Besides, the plausible biogenetic pathways of 1-2 were proposed, and all of them were evaluated for RXRα transcriptional-inhibitory activities and cytotoxicity against HeLa cells.
November 4, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27810398/highly-oxidized-sesquiterpenes-from-artemisia-austro-yunnanensis
#18
Jun Chi, Bao-Cai Li, Wei-Feng Dai, Lan Liu, Mi Zhang
Eight new sesquiterpenes, including four guaianolides (1-4), one guaian sesquiterpene (5), one norguaianolide (6), one 1, 10-secoguaianolides (7), and one eudesmane sesquiterpene (8), along with fourteen known sesquiterpenes (9-22) were isolated from the whole plants of Artemisia austro-yunnanensis. Their structures were elucidated on the basis of spectroscopic date and HRESIMS analysis. All isolated sesquiterpenes (1-22) were evaluated their activities by the assay of LPS-induced NO production on RAW264.7, of which compounds 2-4, 9, 10 and 17 produced significant inhibition of NO production with IC50 values ranging from 2...
November 1, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27810397/pharmacokinetics-of-dietary-kaempferol-and-its-metabolite-4-hydroxyphenylacetic-acid-in-rats
#19
Volha Zabela, Chethan Sampath, Mouhssin Oufir, Fahimeh Moradi-Afrapoli, Veronika Butterweck, Matthias Hamburger
SCOPE: Kaempferol is a major flavonoid in the human diet and in medicinal plants. The compound exerts anxiolytic activity when administered orally in mice, while no behavioural changes were observed upon intraperitoneal administration, or upon oral administration in gut sterilized animals. 4-Hydroxyphenylacetic acid (4-HPAA), which possesses anxiolytic effects when administered intraperitoneally, is a major intestinal metabolite of kaempferol. Pharmacokinetic properties of the compounds are currently not clear...
November 1, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27777133/callviminols-a-e-new-terpenoid-conjugated-phloroglucinols-from-the-leaves-of-callistemon-viminalis
#20
Hong-Xin Liu, Kai Chen, Yuan Liu, Can Li, Jie-Wei Wu, Zhi-Fang Xu, Hai-Bo Tan, Sheng-Xiang Qiu
Callviminols A-E (1-5), five rare phloroglucinols bearing a framework embodying a hexahydrodibenzo[b,d]furan or 2-phenylcyclohexanol nucleus derived from a phloroglucinol-monoterpene adduct, were isolated from the leaves of Callistemon viminalis. Their structures were established via extensive spectroscopic measurements, with the absolute configuration of 5 determined by electronic circular dichroism (ECD) calculations. The plausible biogenetic pathway suggested that a unique oxidative radical addition and classic cationic cyclization were key biosynthetic steps...
October 25, 2016: Fitoterapia
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