搜索范围
89797
应用筛选条件
关键词:'89797'
显示 1-30 #N/A 118 条结果 关于 "89797" 范围 论文
Marcin Broniatowski et al.
Biochimica et biophysica acta, 1838(10), 2530-2538 (2014-06-08)
Pentacyclic triterpene acids (PTAs): betulinic (BAc), oleanolic (Ola) and ursolic (Urs) are potent pharmaceuticals applied in the therapy of cancer and bacterial infections. The mechanism of PTA action is multifactor, but the important step is their interaction with the lipids
Zhongjie Liang et al.
European journal of medicinal chemistry, 46(6), 2011-2021 (2011-03-29)
Naturally occurring pentacyclic triterpenes (PT), a novel class of inhibitors against glycogen phosphorylase (GP), hold promise for the treatment of type-2 diabetes and other diseases with disorders in glycogen metabolism. To identify novel and more potent GP inhibitors, the receptor-based
Burcu Çulhaoğlu et al.
Natural product research, 27(4-5), 438-447 (2012-11-07)
The dichloromethane extract of the aerial parts of Salvia chrysophylla Stapf (Lamiaceae), which is an endemic species to south-western Anatolia, was studied for non-volatile secondary metabolites for the first time in this study. Structures of the isolated compounds were elucidated
Riki Ogasawara et al.
American journal of physiology. Endocrinology and metabolism, 305(6), E760-E765 (2013-08-01)
A recent study identified ursolic acid (UA) as a potent stimulator of muscle protein anabolism via PI3K/Akt signaling, thereby suggesting that UA can increase Akt-independent mTOR complex 1 (mTORC1) activation induced by resistance exercise via Akt signaling. The purpose of
Huang-Yao Tu et al.
Bioorganic & medicinal chemistry, 17(20), 7265-7274 (2009-09-18)
Twenty-three ursolic acid (1) derivatives 2-24 including nine new 1 derivatives 5, 7-11, 20-22 were synthesized and evaluated for cytotoxicities against NTUB1 cells (human bladder cancer cell line). Compounds 5 and 17 with an isopropyl ester moiety at C-17-COOH and
Fang Wang et al.
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 38(9), 1378-1385 (2013-08-16)
Eighteen compounds were isolated by a combination of various chromatographic techniques including column chromatography over macroporous resin, MCI gel, silica gel, and sephadex LH-20 and reversed-phase HPLC. Their structures were elucidated by spectroscopic data analysis as adinoside A (1), stryspinoside
Jing Li et al.
Journal of natural products, 72(6), 983-987 (2009-06-27)
Two new dihydropyranocoumarins, scuteflorins A (1) and B (2), together with the known compounds decursin (3), chrysin (4), oroxylin A (5), wogonin (6), 5,7-dihydroxy-8,2'-dimethoxyflavone, dihydrochrysin, dihydrooroxylin A, lupenol, scutellaric acid, pomolic acid, ursolic acid, beta-sitosterol, daucosterol, and palmitic acid, were
Yumiko Achiwa et al.
Bioscience, biotechnology, and biochemistry, 71(1), 31-37 (2007-01-11)
The phosphatidylinositol 3-kinase-Akt (PI3K-Akt) pathway and the mitogen activated protein kinase (MAPK) pathway are important in the development and proliferation of various human cancers. It has been found recently that ursolic acid treatment affects growth and apoptosis in cancer cells.
Francisco J Prado-Prado et al.
Bioorganic & medicinal chemistry, 18(6), 2225-2231 (2010-02-27)
There are many of pathogen parasite species with different susceptibility profile to antiparasitic drugs. Unfortunately, almost QSAR models predict the biological activity of drugs against only one parasite species. Consequently, predicting the probability with which a drug is active against
Chia-Lin Lee et al.
Bioorganic & medicinal chemistry letters, 20(24), 7354-7357 (2010-11-26)
Two novel derivatized peptides, designated as ixorapeptide I (1) and ixorapeptide II (2), in addition to 28 other known compounds, were isolated from the MeOH extract of Ixora coccinea using bioassay-guided fractionation. The structures of metabolites 1 and 2 were
Nazia Bibi et al.
Bioorganic & medicinal chemistry letters, 20(14), 4173-4176 (2010-06-15)
In vitro antituberculosis activities of fractions and pure compounds (1-20) including seven triterpenes, two alkaloids, two cycloheximide derivatives, two coumarins six sterol derivatives and a long chain alcohol, respectively, isolated from Haloxylon salicornicum were determined against Mycobacterium tuberculosis H37Rv. Actively
Liwei Fu et al.
Journal of natural products, 68(2), 198-206 (2005-02-26)
New ursane-type triterpene 1, oleanane-type triterpene 2, and dammarane-type triterpene 15 were isolated from the leaves of Nerium oleander together with 12 known triterpenes, 3beta-hydroxy-12-ursen-28-oic acid (ursolic acid, 3), 3beta,27-dihydroxy-12-ursen-28-oic acid (4), 3beta,13beta-dihydroxyurs-11-en-28-oic acid (5), 3beta-hydroxyurs-12-en-28-aldehyde (6), 28-norurs-12-en-3beta-ol (7), urs-12-en-3beta-ol
Katerina Naumoska et al.
Journal of chromatography. A, 1381, 229-238 (2015-01-20)
Three TLC methods were used for an initial screening of some common plant triterpenoids and phytosterols in cuticular wax extracts of different vegetables (zucchini, eggplant, tomato, red pepper, mangold, spinach, lettuce, white-colored radicchio di Castelfranco, raddichio Leonardo, white cabbage, red
Uppuluri V Mallavadhania et al.
Natural product communications, 9(12), 1687-1690 (2015-01-30)
Ursolic acid (1), a natural pentacyclic triterpenic acid, afforded a variety of ring-C transformed products (5-11) when treated with N-bromosuccinimide under the influence of a range of protective groups and solvents. The synthesized compounds have been evaluated for cytotoxic activity
Zi-Ming Chen et al.
Steroids, 87, 21-25 (2014-06-01)
Three novel degraded steroids, named albocisterols A-C (1-3), have been isolated from cultures of Antrodiella albocinnamomea. Their structures were defined by comprehensive spectroscopic analysis and single crystal X-ray crystallography. The mixture of compounds 2 and 3 exhibited significant inhibitory activities
Bartłomiej Micota et al.
Acta biochimica Polonica, 61(2), 385-388 (2014-06-12)
The objective was an assessment of the impact of Leonurus cardiaca L. extract (LCE) and ursolic acid (UA) on the adhesive properties of Staphylococus aureus NCTC 8325 strain, expressing virulence factors important in the pathogenesis of infective endocarditis. The adhesion
Renato F Freitas et al.
Bioorganic & medicinal chemistry, 17(6), 2476-2482 (2009-03-04)
Based on its essential role in the life cycle of Trypanosoma cruzi, the glycolytic enzyme glyceraldehyde 3-phosphate dehydrogenase (GAPDH) has been considered a promising target for the development of novel chemotherapeutic agents for the treatment of Chagas' disease. In the
Changon Seo et al.
Bioorganic & medicinal chemistry letters, 19(21), 6095-6097 (2009-09-29)
In the course of bioassay-guided study on the EtOAc extract of a culture broth of the marine-derived fungus Cosmospora sp. SF-5060, aquastatin A (1) was isolated as a protein tyrosine phosphatase 1B (PTP1B) inhibitory component produced by the fungus. The
George R Pettit et al.
Journal of natural products, 71(3), 438-444 (2008-03-11)
Bioassay-guided fractionation of extracts of various plants, marine organisms, and microorganisms has led to the discovery of new natural sources of a number of known compounds that have significant biological activity. The isolation of interesting and valuable cancer cell growth
MinKyun Na et al.
Journal of natural products, 69(11), 1572-1576 (2006-11-28)
Inhibition of protein tyrosine phosphatase-1B (PTP1B) has been proposed as a therapy for treatment of type-2 diabetes and obesity. Bioassay-guided fractionation of an EtOAc-soluble extract of the root bark of Erythrina mildbraedii, using an in vitro PTP1B inhibitory assay, resulted
Yaoyao Jia et al.
Bioorganic & medicinal chemistry letters, 21(19), 5876-5880 (2011-08-23)
In this study, we confirmed that ursolic acid, a plant triterpenoid, activates peroxisome proliferator-activated receptor (PPAR)-α in vitro. Surface plasmon resonance and time-resolved fluorescence resonance energy transfer analyses do not show direct binding of ursolic acid to the ligand-binding domain
Duc Manh Hoang et al.
Bioorganic & medicinal chemistry letters, 19(23), 6759-6761 (2009-10-23)
Bioassay-guided fractionation of the chloroform-soluble fraction of Morus bombycis, using an in vitro PTP1B inhibitory assay led to the identification of three 2-arylbenzofurans, albafuran A (1), mulberrofuran W (2) and mulberrofuran D (6), along with three chalcone-derived Diels-Alder products, kuwanon
Josimar de Oliveira Eloy et al.
AAPS PharmSciTech, 13(4), 1436-1445 (2012-10-17)
Solid dispersions (SDs) are an approach to increasing the water solubility and bioavailability of lipophilic drugs such as ursolic acid (UA), a triterpenoid with trypanocidal activity. In this work, Gelucire 50/13, a surfactant compound with permeability-enhancing properties, and silicon dioxide
Allisson Jhonatan Gomes Castro et al.
Biochimica et biophysica acta, 1850(1), 51-61 (2014-10-15)
The effect of in vivo treatment with ursolic acid (UA) on glycemia in hyperglycemic rats and its mechanism of action on muscle were studied. The UA effects on glycemia, glycogen, LDH, calcium and on insulin levels were evaluated after glucose
Yunbao Liu et al.
Journal of natural products, 73(7), 1193-1195 (2010-06-23)
Antioxidants scavenge free radicals, singlet oxygen, and electrons in cellular redox reactions. The yellow MTT [3-(4,5-dimethylthiazole-2-yl)-2,5-diphenyltetrazolium bromide] is reduced to a purple formazan by mitochondrial enzymes. NADPH is the basis of established in vitro cell viability assays. An antioxidant assay
Kashif Jilani et al.
Journal of natural products, 74(10), 2181-2186 (2011-09-20)
Ursolic acid (1), a triterpenoid with pleotropic effects including inhibition of tumor growth, is well known to trigger apoptosis of nucleated cells. The effect is at least partially due to altered gene expression and mitochondrial dysfunction. Erythrocytes lack nuclei and
Heejung Yang et al.
Journal of natural products, 74(4), 751-756 (2011-02-12)
Bioassay-guided fractionation of an 80% MeOH extract of leaves and twigs of Juglan sinensis has resulted in the isolation of four new triterpenes (1-4) and 17 known triterpenes (5-21). The new compounds were determined to be 1-oxo-3β,23-dihydroxyolean-12-en-28-oic acid 28-O-β-D-glucopyranoside (1)
Zhiguo Liu et al.
Bioorganic & medicinal chemistry letters, 21(12), 3755-3758 (2011-05-11)
A series of bromo-retrochalcones was designed, synthesized and evaluated as PTP1B inhibitors based on licochalcone A and E. Compounds 6, 12, 13, 14, 25, 36, 37, 39, and 41 showed potent inhibitory effects against PTP1B, and compound 37, the most
Shuilong Leng et al.
International journal of cancer, 133(12), 2781-2790 (2013-06-06)
Ursolic acid (UA) has been reported to possess anticancer activities. Although some of the anticancer activities of UA have been explained by its apoptosis-inducing properties, the mechanisms underlying its anticancer actions are largely unknown. We have found that UA-activated autophagy
Augusta Caligiani et al.
Food chemistry, 136(2), 735-741 (2012-11-06)
The occurrence of triterpene pentacyclic acids in plants is extensive, but little is known about their availability in commercial extracts. A simple GC-MS method for the simultaneous determination of betulinic, corosolic, maslinic, oleanolic and ursolic acids was developed and applied
1/4