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Showing 1-30 of 99 results for "B103608" within Papers
W Kehr et al.
Journal of neural transmission, 40(2), 129-147 (1977-01-01)
The interaction of (+)-amphetamine with haloperidol and gamma-butyrolactone on synthesis of monoamines in rat brain regions was investigated using an in vivo method, in which the accumulation of dopa and 5-hydroxytryptophan (5-HTP) was measured after inhibition of the aromatic amino
Charlotte Majerczyk et al.
Journal of bacteriology, 196(7), 1412-1424 (2014-01-28)
Burkholderia thailandensis contains three acyl-homoserine lactone quorum sensing circuits and has two additional LuxR homologs. To identify B. thailandensis quorum sensing-controlled genes, we carried out transcriptome sequencing (RNA-seq) analyses of quorum sensing mutants and their parent. The analyses were grounded
Mingming Zhao et al.
Molecules (Basel, Switzerland), 18(3), 3266-3278 (2013-03-15)
A novel series of N-sulfonyl homoserine lactone derivatives 5a-l has been designed, synthesized and evaluated for quorum sensing inhibitory activities towards violacein production. Of the compounds synthesized, compound 5h was found to possess an excellent level of enantiopurity (99.2% e.e.).
Sang-Ho Chung et al.
Journal of nanoscience and nanotechnology, 13(11), 7701-7706 (2013-11-20)
In this study, a novel, strategic method was developed for the synthesis of a mesoporous silica catalyst embedded with ruthenium nanoparticles (RuNPs/SiO2) by combining the polyol and modified sol-gel methods. By applying this new procedure, uniformly synthesized ruthenium nanoparticles with
David Santos et al.
The Journal of organic chemistry, 78(4), 1519-1524 (2013-01-24)
An enantioselective approach to (-)-isoavenaciolide was achieved starting from 1-undecyn-3-ol. The synthesis relied upon the preparation of a chiral 4-silyloxy-2-alkenylborane by hydroboration of a protected 2,3-allenol and subsequent stereoselective addition to 2-thiophenecarboxaldehyde.
Mérièm Anouti et al.
Physical chemistry chemical physics : PCCP, 15(17), 6539-6548 (2013-03-28)
This study describes the use of the pyrrolidinium nitrate ([Pyrr][NO3]) protic ionic liquid (PIL) in a mixture with gamma butyrolactone (γ-BL) as an electrolyte for carbon-based supercapacitors with an operating voltage of 2.0 V and at very low temperature. Thermal
Crystal structures of two phytohormone signal-transducing α/β hydrolases: karrikin-signaling KAI2 and strigolactone-signaling DWARF14.
Li-Hua Zhao et al.
Cell research, 23(3), 436-439 (2013-02-06)
Hagai Tavori et al.
Bioorganic & medicinal chemistry, 16(15), 7504-7509 (2008-06-24)
Paraoxonase1 (PON1) is a HDL bound enzyme and many of the anti-atherogenic properties of HDL are attributed to PON1. The enzyme precise mechanism of protective action and its endogenous substrate remain elusive. PON1 hydrolyzes organophosphates, arylesters and lactones, whereas the
Petra Seibold et al.
International journal of cancer, 135(4), 923-933 (2014-01-18)
We previously reported that high concentrations of enterolactone, a lignan metabolite, are associated with lower mortality in 1,140 breast cancer patients from Germany. Using an extended set of 2,182 patients aged 50-74 years at diagnosis (2001-2005) and prospectively followed up
Jong-Sik Jin et al.
Molecules (Basel, Switzerland), 18(1), 1122-1127 (2013-01-18)
Phytoestrogens are defined as plant-derived compounds with estrogen-like activities according to their chemical structures and activities. Plant lignans are generally categorized as phytoestrogens. It was reported that (-)-arctigenin, the aglycone of arctiin, was demethylated to (-)-dihydroxyenterolactone (DHENL) by Eubacterium (E.)
Leo J Schep et al.
Clinical toxicology (Philadelphia, Pa.), 50(6), 458-470 (2012-07-04)
Gamma-hydroxybutyrate (GHB) and its precursors, gamma-butyrolactone (GBL) and 1,4-butanediol (1,4-BD), are drugs of abuse which act primarily as central nervous system (CNS) depressants. In recent years, the rising recreational use of these drugs has led to an increasing burden upon
Yifat Glucksam-Galnoy et al.
Journal of immunology (Baltimore, Md. : 1950), 191(1), 337-344 (2013-05-31)
The bacterial molecule N-3-oxo-dodecanoyl-l-homoserine lactone (C12) has critical roles in both interbacterial communication and interkingdom signaling. The ability of C12 to downregulate production of the key proinflammatory cytokine TNF-α in stimulated macrophages was suggested to contribute to the establishment of
Marta Ferraroni et al.
Journal of structural biology, 182(1), 44-50 (2013-02-05)
5-Chloromuconolactone dehalogenase (5-CMLD) is a unique enzyme that catalyzes the conversion of 5-chloromuconolactone into cis-dienelactone in the new modified ortho-pathway of the 3-chlorocatechol degradation by Rhodococcus opacus 1CP. In all other known chlorocatechol pathways the dehalogenation is a spontaneous secondary
Marina Kolomytseva et al.
Biochimica et biophysica acta, 1844(9), 1541-1549 (2014-04-29)
2-Chloromuconate cycloisomerase from the Gram-positive bacterium Rhodococcus opacus 1CP (Rho-2-CMCI) is an enzyme of a modified ortho-pathway, in which 2-chlorophenol is degraded using 3-chlorocatechol as the central intermediate. In general, the chloromuconate cycloisomerases catalyze not only the cycloisomerization, but also
Christian Schwarzer et al.
American journal of physiology. Cell physiology, 306(9), C844-C855 (2014-03-07)
Pseudomonas aeruginosa secretes N-(3-oxododecanoyl)-homoserine lactone (C12) as a quorum-sensing molecule to regulate gene expression. Micromolar concentrations are found in the airway surface liquid of infected lungs. Exposure of the airway surface to C12 caused a loss of transepithelial resistance within
Axel Bidon-Chanal et al.
European journal of medicinal chemistry, 60, 479-489 (2013-01-29)
Glycogen synthase kinase 3β (GSK-3β) is widely recognised as a relevant player in the pathogenesis of several highly prevalent disorders such as Alzheimer's disease, mood disorders, diabetes and cancer. Therefore, this enzyme constitutes a highly attractive therapeutic target for the
Amanda L Garner et al.
Chemical communications (Cambridge, England), 49(15), 1515-1517 (2013-01-19)
As a guide for chemical probe design, focused analogue synthetic studies were undertaken upon the lactone ring of 3-oxo-C(12)-homoserine lactone. We have concluded that hydrolytic instability of the heterocyclic ring is pivotal for its ability to modulate immune signaling and
Ryoko Taguchi et al.
American journal of physiology. Cell physiology, 307(2), C162-C168 (2014-05-23)
N-acyl-homoserine lactones (AHL) are quorum-sensing molecules in bacteria that play important roles in regulating virulence gene expression in pathogens such as Pseudomonas aeruginosa. The present study compared responses between undifferentiated and differentiated Caco-2 cells to N-(3-oxododecanoyl)-L-homoserine lactone (3-oxo-C12-HSL). A low
Marius Henkel et al.
Applied microbiology and biotechnology, 97(17), 7607-7616 (2013-06-20)
Quorum sensing affects the regulation of more than 300 genes in Pseudomonas aeruginosa, influencing growth, biofilm formation, and the biosynthesis of several products. The quorum sensing regulation mechanisms are mostly described in a qualitative character. Particularly, in this study, the
Belén Vaz et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 19(39), 13065-13074 (2013-08-14)
A new stereocontrolled total synthesis of the configurationally labile C37 -norcarotenoid pyrrhoxanthin in enantiopure form has been completed. A highly stereoselective Horner-Wadsworth-Emmons (HWE) condensation of a C17-allylphosphonate and a C20-aldehyde was used as the last conjunctive step. Both a Sonogashira
Xi Li et al.
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 38(17), 2838-2843 (2014-01-02)
Bioactivity of Danggui is linked to the content of ligustilide, but the relationship between ligustilide with herb shape, cultivating areas and plant species is still unknown. The relationship was investigated by quantifying on the amounts of Z-ligustilide and E-ligustilide by
Nisha Agrawal et al.
Chemistry & biodiversity, 10(3), 394-400 (2013-03-16)
Phytochemical investigations of a MeOH extract obtained from the heartwoods of the Litsea glutinosa (Lauraceae) led to the isolation and characterization of four new butenolides, (3R,4S,5S)-2-hexadecyl-3-hydroxy-4-methylbutanolide 1, litsealactone C (2), and litsealactone D (4), litsealactone G (5), and a new
David M Wood et al.
Drug testing and analysis, 3(7-8), 417-425 (2011-05-07)
Gamma-hydroxybutyrate (GHB) has been used as a recreational drug since the 1990s and over the last few years there has been increasing use of its analogues gamma-butyrolactone (GBL) and to a lesser extent 1,4-butanediol (1,4BD). This review will summarize the
Huquan Gao et al.
Bioorganic & medicinal chemistry letters, 23(6), 1776-1778 (2013-02-16)
A new butenolide isoaspulvinone E (1), together with two known butenolides aspulvinone E (2) and pulvic acid (3) were isolated from the marine-derived fungus, Aspergillus terreus Gwq-48. They showed significant anti-influenza A H1N1 virus activities, with IC50 values of 32.3
Collin H Martin et al.
Nature communications, 4, 1414-1414 (2013-01-31)
The replacement of petroleum feedstocks with biomass to produce platform chemicals requires the development of appropriate conversion technologies. 3-Hydroxy-γ-butyrolactone has been identified as one such chemical; however, there are no naturally occurring biosynthetic pathways for this molecule or its hydrolyzed
Ting-ting Ren et al.
Bioresource technology, 129, 655-658 (2013-01-12)
A laboratory study was conducted to investigate the production of quorum sensing (QS) molecules by aerobic granules in membrane-partitioned bioreactor. Flow-chamber (FC) tests with Escherichia coli K12 demonstrated that granules induced more attached growth of E. coli cells than activated
Kuk-Ki Hong et al.
Journal of industrial microbiology & biotechnology, 41(10), 1517-1524 (2014-08-27)
There has been a significant global interest to produce bulk chemicals from renewable resources using engineered microorganisms. Large research programs have been launched by academia and industry towards this goal. Particularly, C4 chemicals such as succinic acid (SA) and 1,4-butanediol
Michelle Wood et al.
Journal of chromatography. A, 1056(1-2), 83-90 (2004-12-15)
We have developed a rapid method that enables the simultaneous analysis of gamma-hydroxybutyrate (GHB) and its precursors, i.e. gamma-butyrolactone (GBL) and 1,4-butanediol (1,4-BD) in urine. The method comprised a simple dilution of the urine sample, followed by liquid chromatography-tandem mass
Yi Dong et al.
Molecular diversity, 17(1), 1-7 (2013-01-12)
A palladium-catalyzed selective synthesis of cis- or trans-chloro-substituted-α-methylene-γ-butyrolactones from single substrate (propiolic acid) has been realized by controlling cis- or trans-chloropalladation. This method is highly effective for building C-Cl, C-O, and C-C bonds into a one-pot procedure because of its
Xiaocong Xie et al.
Organic letters, 15(7), 1500-1503 (2013-03-22)
Allylic cyclopropenecarboxylates undergo ring expansion reactions to give 2-allyloxyfuran intermediates, which subsequently rearrange to Δ(β,γ) butenolides via a Claisen rearrangement or to the corresponding Δ(α,β) butenolides via further Cope rearrangement. Also described are methods for chirality transfer in the rearrangement
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