- Interstaple dithiol cross-linking in Au25(SR)18 nanomolecules: A combined mass spectrometric and computational study
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A systematic study of cross-linking chemistry of the Au25(SR) 18 nanomolecule by dithiols of varying chain length, HS-(CH 2)n-SH where n = 2, 3, 4, 5, and 6, is presented here. Monothiolated Au25 has six [RSAuSRAuSR] staple motifs on its surface, and MALDI mass spectrometry data of the ligand exchanged clusters show that propane (C3) and butane (C4) dithiols have ideal chain lengths for interstaple cross-linking and that up to six C3 or C4 dithiols can be facilely exchanged onto the cluster surface. Propanedithiol predominately exchanges with two monothiols at a time, making cross-linking bridges, while butanedithiol can exchange with either one or two monothiols at a time. The extent of cross-linking can be controlled by the Au25(SR)18 to dithiol ratio, the reaction time of ligand exchange, or the addition of a hydrophobic tail to the dithiol. MALDI MS suggests that during ethane (C2) dithiol exchange, two ethanedithiols become connected by a disulfide bond; this result is supported by density functional theory (DFT) prediction of the optimal chain length for the intrastaple coupling. Both optical absorption spectroscopy and DFT computations show that the electronic structure of the Au25 nanomolecule retains its main features after exchange of up to eight monothiol ligands.
- Jupally, Vijay Reddy,Kota, Rajesh,Dornshuld, Eric Van,Mattern, Daniell L.,Tschumper, Gregory S.,Jiang, De-En,Dass, Amala
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- A novel class of cationic and non-peptidic small molecules as hits for the development of antimicrobial agents
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Cationic and non-peptide small molecules containing a total of six positive charges arranged on one side and a long aliphatic tail on the other have been synthesized and tested against Gram-positive and Gram-negative bacteria. The positive charges have be
- Jiménez, Aranza,García, Pablo,De La Puente, Sofia,Madrona, Andrés,Camarasa, María José,Pérez-Pérez, María-Jesús,Quintela, José-Carlos,García-del Portillo, Francisco,San-Félix, Ana
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- COMPOSITIONS AND METHODS FOR THE MODULATION OF SPECIFIC AMIDASES FOR N-ACYLETHANOLAMINES FOR USE IN THE THERAPY OF INFLAMMATORY DISEASES
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The present invention regards compositions and methods for the modulation of amidases capable of hydrolysing N-acylethanolamines useable in the therapy of inflammatory diseases. In particular, the present invention regards a compound of general formula (I): enantiomers, diastereoisomers, racemes and mixtures, polymorphs, salts, solvates thereof, wherein: (a) R is a linear alkyl radical having 13 to 19 carbon atoms or alkenyl radical having 13 to 19 carbon atoms carrying a double bond; (b) X is 0 or S; (c) Y is a 2 or 3 carbon atom alkylene residue, optionally substituted with one or two groups equal or different from each other and selected from among the group consisting of: —CH3, —CH2OH, —COOCH3, —COOH. Y may preferably be: —CH2—CH2—, —CH2—CH2—CH2—, CH(CH3)—CH2—, —CH2—CH(CH3)—, —CH2—C(CH3)2—, —CH2—CH(CH2OH)—, —CH2—C((CH2OH)2)—, —CH═CH—, —CH2—CH(COOCH3)—, —CH2—CH(COOH)—, for use as a medicine.
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Paragraph 0053
(2015/03/04)
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- COMPOSITIONS AND METHODS FOR THE MODULATION OF SPECIFIC AMIDASES FOR N-ACYLETHANOLAMINES FOR USE IN THE THERAPY OF INFLAMMATORY DISEASES
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The present invention regards compositions and methods for the modulation of amidases capable of hydrolysing N-acylethanolamines useable in the therapy of inflammatory diseases. In particular, the present invention regards a compound of general formula (I): enantiomers, diastereoisomers, racemes and mixtures, polymorphs, salts, solvates thereof, wherein: (a) R is a linear alkyl radical having 13 to 19 carbon atoms or alkenyl radical having 13 to 19 carbon atoms carrying a double bond; (b) X is 0 or S; (c) Y is a 2 or 3 carbon atom alkylene residue, optionally substituted with one or two groups equal or different from each other and selected from among the group consisting of: -CH3, -CH2OH, -COOCH3, -COOH. Y may preferably be: -CH2-CH2-, -CH2-CH2-CH2-, CH (CH3) -CH2-, -CH2-CH (CH3) -, -CH2-C (CH3) 2-, -CH2-CH (CH2OH) -, -CH2-C ( (CH2OH) 2) -, -CH=CH-, -CH2-CH (COOCH3) -, -CH2-CH (COOH) -, for use as a medicine.
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Page/Page column 25-27
(2013/08/28)
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- NOVEL SYNTHETIC ANALOGS OF SPHINGOLIPIDS
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The present invention provides new ceramide analogs indicated as the compounds of formula (II). These novel analogs exhibit a significant anti cancerous effect and are therefore provided as a pharmaceutical composition for treating cell proliferative diseases, neurodegenerative disorders, metabolism-associated conditions, infectious diseases, and immune-related disorders. The invention further provides combined compositions and kits combining the novel ceramide analogs of formula (II) with an additional therapeutic agent.
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Page/Page column 43-44
(2009/06/27)
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- Compositions and methods for enrichment of neural stem cells using ceramide analogs
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The present invention provides compositions and methods for human neural cell production. More particularly, the present invention provides cellular differentiation methods employing amphiphilic lipid compounds, preferably ceramide analogs of the β-hydroxyalkylamine type and optionally employing an essentially serum free MEDII conditioned medium for the generation of human neural cells from pluripotent human cells. The methods alternatively comprise modulating apoptosis by modifying the levels of PAR-4, with or without the presence of amphiphilic lipid compounds and optionally employing MEDII conditioned medium. The methods alternatively encompass modulating apoptosis by modulating the intracellular concentration of endogenous lipid second messengers, such as ceramide.
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Page/Page column 23-24
(2008/12/04)
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- Therapeutic use of mono and bicarboxylic acid amides active at the peripheral cannabinoid receptor
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The following description concerns a therapeutic method for the treatment of diseases connected with the modulation of the cannabinoid peripheral receptor, comprising administering amidic derivatives of mono and bicarboxylic acids with aminoalcohols or arninoethers selectively active on said receptor.
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