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Showing 1-30 of 42 results for "D9404" within Papers
Cheng-Wei Yang et al.
Biochemical pharmacology, 180, 114122-114122 (2020-06-28)
An unprecedented biological function of natural cardenolides independent of their membrane target Na+/K+-ATPase is disclosed. Previously, we reported that cardenolides impart anti-transmissible gastroenteritis coronavirus (anti-TGEV) activity through the targeting of Na+/K+-ATPase and its associated PI3K_PDK1_RSK2 signaling. Swine testis cells with
The crystal structure of digitoxigenin, C23H34O4
Isabella Karle and J. Karle
Acta Crystallographica Section B, Structural Crystallography and Crystal Chemistry, B25, 434-434 (1969)
Xinchi Feng et al.
Journal of pharmaceutical and biomedical analysis, 138, 378-385 (2017-02-01)
An LC-MS/MS method was developed for the determination of digitoxigenin in mice skin samples. Chromatographic separation was achieved on an Agilent Poroshell 120 EC-C18 column. Mass spectrometric detection was achieved by a triple-quadrupole mass spectrometer equipped with an ESI interface
Machiko Ono et al.
Chemical & pharmaceutical bulletin, 60(8), 1076-1082 (2012-08-07)
The addition of 4 eq of chloral to osmundalactone (4S,5R)-4 gave quantitative formation of the hemiacetal derivative (4S,5R)-8, which was treated with methane sulfonic acid to afford the intramolecular Micheal addition product (+)-(3S,4S,5R)-9 possessing a 3,4-cis-dihydroxy-δ-lactone in 78% overall yield
Maoquan Zhou et al.
Organic letters, 8(19), 4339-4342 (2006-09-08)
A convergent and stereocontrolled route to trisaccharide natural product digitoxin has been developed. The route is amenable to the preparation of both the digitoxigen mono- and bisdigitoxoside. This route featured the iterative application of the palladium-catalyzed glycosylation reaction, reductive 1,3-transposition
John W Hinds et al.
ChemMedChem, 8(1), 63-69 (2012-11-10)
Sweet'n low in stereo: A Wharton reaction was employed along with a diastereoselective palladium-catalyzed glycosylation and other post-glycosylation transformations to synthesize digitoxin analogues. Cytotoxic evaluation against a panel of cancer cell lines uncovered the stereochemical and substitutional limits of the
S Zillikens et al.
Biochimica et biophysica acta, 1509(1-2), 155-166 (2000-12-19)
The current (I(p)) generated by the wild-type or the glutamate (E) 779 alanine (A) mutant of the rat Na(+)/K(+) pump alpha1-subunit expressed in HEK 293 cells was studied at 35 degrees C by means of whole-cell recording in Na(+)-free and
Margarita Ramirez et al.
Biochemical pharmacology, 70(6), 851-857 (2005-08-06)
Compound 14beta,17beta-cycloketoester-3beta-OH androstane (INCICH-D7) is a semisynthetic product of a structural modification of the digitoxigenin molecule. INCICH-D7 has a heterocyclic ketoester type fusion between positions C14 and C17 of the steroid nucleus, which confers this molecule stronger electronegativity than that
A Babes et al.
Biophysical journal, 79(5), 2557-2571 (2000-10-29)
We have used admittance analysis together with the black lipid membrane technique to analyze electrogenic reactions within the Na(+) branch of the reaction cycle of the Na(+)/K(+)-ATPase. ATP release by flash photolysis of caged ATP induced changes in the admittance
M Gobbini et al.
Bioorganic & medicinal chemistry, 6(10), 1889-1894 (1998-12-05)
The four stereoisomers of the 2-hydroxy derivatives of digitoxigenin and 3-epidigitoxigenin have been synthesized, their structures established by NMR, and their binding affinity for the digitalis receptor on Na+, K(+)-ATPase evaluated. These derivatives showed lower affinities than the parent compounds.
T Warashina et al.
Chemical & pharmaceutical bulletin, 48(4), 516-524 (2000-04-27)
Twenty-nine new oxypregnane glycosides were obtained along with two known cardenolides, frugoside and gofruside, and three known 12-O-acylated pregnane glycosides from the roots of Asclepias incarnata L. (Asclepiadaceae). By detailed studies of the 1H- and 13C-NMR spectra, the structures were
Miguel López-Lázaro et al.
Journal of natural products, 68(11), 1642-1645 (2005-11-29)
The cardiac glycosides digitoxin (1) and digoxin (3) have been used in cardiac diseases for many years. During this time several reports have suggested the possible use of digitalis in medical oncology. Several analogues of digitoxin (1) were evaluated for
Y Ikeda et al.
Clinica chimica acta; international journal of clinical chemistry, 314(1-2), 245-247 (2001-11-24)
Digitoxin is used to treat patients with heart failure. A radioimmunoassay procedure for the specific determination for digitoxin in serum was developed using the antiserum (antiserum (A)) raised against digitoxin 3'-hemisuccinate-BSA conjugate. The intra- and interassay variability were <10% in
Raymond W Wong et al.
Scientific reports, 8(1), 850-850 (2018-01-18)
The capacity of HIV-1 to develop resistance to current drugs calls for innovative strategies to control this infection. We aimed at developing novel inhibitors of HIV-1 replication by targeting viral RNA processing-a stage dependent on conserved host processes. We previously
P De Weer et al.
The Journal of general physiology, 117(4), 315-328 (2001-03-30)
The steady-state voltage and [Na(+)](o) dependence of the electrogenic sodium pump was investigated in voltage-clamped internally dialyzed giant axons of the squid, Loligo pealei, under conditions that promote the backward-running mode (K(+)-free seawater; ATP- and Na(+)-free internal solution containing ADP
Gerhard Prinsloo et al.
Natural product research, 24(18), 1743-1746 (2010-10-29)
Human immunodeficiency virus (HIV) affects more than 40 million people worldwide and more than 5 million in South Africa alone. There is no cure for the disease yet, and novel effective drugs need to be discovered to make any progress
Rodrigo M Pádua et al.
Steroids, 73(4), 458-465 (2008-02-06)
A simple and versatile method for the chemical synthesis of 21-hydroxypregnane 21-O-malonyl hemiesters which may be important intermediates of cardenolide biosynthesis is described. Starting from commercial beta-methyldigitoxin, acid hydrolysis followed by 3beta-O-acetylation and ozonolysis with reductive cleavage of the ozonides
M Tamura et al.
Clinical and experimental hypertension (New York, N.Y. : 1993), 20(5-6), 543-550 (1998-07-31)
To identify the origins and structures of mammalian tissue-derived Na+,K+-ATPase inhibitors, we investigated the tissue distribution of inhibitors in rats. Among many tissues tested, urine was found to contain high levels of many inhibitors. The structures of the two major
Sunanda Panda et al.
Cardiovascular therapeutics, 27(2), 108-116 (2009-05-12)
Doxorubicin is a common chemotherapeutic anticancer drug. Its use is associated with adverse effects including cardiotoxicity. Several therapeutics interventions have been attempted to reduce the toxicity and to improve the efficacy of the drug. However, on phytochemicals very few investigations
F Calderón et al.
Brain research, 854(1-2), 1-5 (2000-04-28)
Spermine has been shown to influence NMDA receptor function through an interaction at the coagonist site for glycine in the central nervous system (CNS) and the retina. In order to support a role for spermine as neurotransmitter or neuromodulator in
János Ujszegi et al.
Journal of chemical ecology, 46(5-6), 534-543 (2020-05-30)
Many organisms synthesize secondary metabolites against natural enemies. However, to which environmental factors the production of these metabolites is adjusted to is poorly investigated in animals, especially so in vertebrates. Bufadienolides are steroidal compounds that are present in a wide
Xiuhai Gan et al.
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 34(24), 3225-3228 (2010-04-01)
To study the constituents of the stems of Periploca forrestii. The compounds were separated and purified by silica gel column chromatography, recrystallization and high-performance liquid chromatography. The structures were identified by various spectroscopic methods. Nine compounds were isolated and identified
Daniel W Young et al.
Nature chemical biology, 4(1), 59-68 (2007-12-11)
High-content screening is transforming drug discovery by enabling simultaneous measurement of multiple features of cellular phenotype that are relevant to therapeutic and toxic activities of compounds. High-content screening studies typically generate immense datasets of image-based phenotypic information, and how best
Marie Jensen et al.
Bioorganic & medicinal chemistry, 19(7), 2407-2417 (2011-03-23)
The cardiac glycoside digitoxin, consisting of a steroid core linked to a labile trisaccharide, has been used for centuries for the treatment of congestive heart failure. The well known pharmacological effect is a result of the ability of cardiac glycosides
S Panda et al.
Hormone and metabolic research = Hormon- und Stoffwechselforschung = Hormones et metabolisme, 43(3), 188-193 (2011-02-03)
The importance of glycoside in the regulation of thyroid dysfunction is not well understood. In the present investigation, effects of periplogenin-3- O-D-glucopyranosyl (1→6)(1→4)-D-cymaropyranoside, isolated from the vegetable, LAGENARIA SICERARIA, in L-thyroxine (L-T₄)-induced hyperthyroidism and in related cardiovascular abnormalities have been
Na Han et al.
Planta medica, 76(6), 561-565 (2009-11-18)
In the present study, a 75% ethanol extract of Streptocaulon juventas (SJ), which had a strong inhibitory effect on the proliferation of human lung A549 adenocarcinoma cells, was subjected to bioassay-guided fractionation. The most active fraction (SJF) was obtained using
Michael C Roy et al.
Journal of natural products, 68(10), 1494-1499 (2005-10-29)
A series of cardenolides and related compounds have been isolated from the aerial parts and roots of the ornamental milkweed, Asclepias curassavica. Their structures were determined by spectroscopic and chemical methods. Among them, three derivatives of calactinic acid methyl ester
M Adamczyk et al.
Bioorganic & medicinal chemistry letters, 9(5), 771-774 (1999-04-14)
Oxidation of digoxigenin and digitoxigenin to the 3-ketones followed by reductive amination produced a mixture of amine epimers. The inability to separate the epimeric mixtures of chemiluminescent digoxigenin probes derived by conjugation to the acridinium label prompted us to develop
F Paganelli et al.
Cellular and molecular biology (Noisy-le-Grand, France), 47(2), 255-260 (2001-05-17)
The Na,K-ATPase function appears impaired in human heart failure with dilation; however little is known in animal model with idiopathic dilated cardiomyopathy. We studied Na,K-ATPase isoform composition and activity from cardiomyopathic hamsters of the MS 200 strain with pure dilated
B Kögel et al.
Arzneimittel-Forschung, 49(8), 679-684 (1999-09-14)
The inotropic efficacy, arrhythmogenicity and cardiohaemodynamic properties of AL 107 (3-alpha-methyl-digitoxigenin glucoside, CAS 62190-59-4), a novel cardiac glycoside, were studied in anaesthetized dogs with pentobarbital-induced acute cardiac insufficiency. Three groups of dogs received AL 107, ouabain or verhicle. The cardiac
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