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Pablo de la Iglesia et al.
Rapid communications in mass spectrometry : RCM, 28(23), 2605-2616 (2014-11-05)
Esterification is one of the most important metabolic routes of lipophilic marine toxins in shellfish. In this work we assessed several chemical acylation reactions aimed at obtaining acyl ester analogues via partial synthesis from the free toxins. The procedures developed
Michał Brokl et al.
Journal of chromatography. A, 1370, 216-229 (2014-12-03)
A method involving headspace solid-phase microextraction (HS-SPME) and comprehensive two-dimensional gas chromatography (GC×GC) coupled to time-of-flight mass spectrometry (TOFMS) was developed and applied to evaluate profiles of volatile compounds present in mainstream tobacco smoke particulate matter trapped on glass fiber
Alberto Sánchez-Guijo et al.
Journal of lipid research, 56(2), 403-412 (2014-12-17)
Steroid sulfatase (STS) deficiency is the underlying cause of the skin condition known as recessive X-linked ichthyosis (RXLI). RXLI patients show scales on their skin caused by high concentrations of cholesterol sulfate (CS), as they are not capable of releasing
Zoran Rankovic
Journal of medicinal chemistry, 58(6), 2584-2608 (2014-12-17)
The human brain is a uniquely complex organ, which has evolved a sophisticated protection system to prevent injury from external insults and toxins. Designing molecules that can overcome this protection system and achieve optimal concentration at the desired therapeutic target
David G Belair et al.
Biomacromolecules, 15(6), 2038-2048 (2014-04-30)
Vascular endothelial growth factor (VEGF) activity is highly regulated via sequestering within the ECM and cell-demanded proteolysis to release the sequestered VEGF. Numerous studies have demonstrated that VEGF activity mediates cellular events leading to angiogenesis and capillary formation in vivo.
A H Wu et al.
Clinical chemistry, 45(7), 1051-1057 (1999-07-01)
In vitro adulterants are used to invalidate assays for urine drugs of abuse. The present study examined the effect of pyridinium chlorochromate (PCC) found in the product "Urine Luck". PCC was prepared and added to positive urine controls at concentrations
Vaibhav Khare et al.
International journal of pharmaceutics, 470(1-2), 51-62 (2014-05-09)
Gemcitabine, a nucleoside analogue, is used in the treatment of various solid tumors, however, its efficacy is limited by rapid metabolism by cytidine deaminase and fast kidney excretion. In this study, a polymeric conjugate of gemcitabine was prepared by covalent
Peng Bai et al.
Nature communications, 6, 5912-5912 (2015-01-22)
Zeolites play numerous important roles in modern petroleum refineries and have the potential to advance the production of fuels and chemical feedstocks from renewable resources. The performance of a zeolite as separation medium and catalyst depends on its framework structure.
Robert T Burns et al.
PloS one, 9(11), e109535-e109535 (2014-11-13)
Marine sediments can contain B vitamins, presumably incorporated from settled, decaying phytoplankton and microorganisms associated with decomposition. Because B vitamins may be advantageous for the energetically intensive processes of metamorphosis, post-metamorphic growth, and reproduction, we tested several B vitamins to
Giorgio Ottaviani et al.
Journal of medicinal chemistry, 50(4), 742-748 (2007-02-16)
The development of in silico and in vitro tools to estimate or predict the passive human skin permeation and distribution of new chemical entities, useful in dermal drug delivery, in absorption studies of toxic compounds, and in the cosmetics industry
JeenJoo S Kang et al.
Quarterly reviews of biophysics, 48(4), 453-464 (2015-11-06)
Means to cause an immunogenic cell death could lead to significant insight into how cancer escapes immune control. In this study, we screened a library of five pyrrole-imidazole polyamides coding for different DNA sequences in a model of B-cell lymphoma
Ngoc-Duc Doan et al.
Biopolymers, 104(5), 629-635 (2015-03-20)
The conformation of the N-amino-imidazolidin-2-one (Aid) peptidomimetic was investigated using NMR spectroscopy and X-ray crystallography. In solution, the tetrapeptide model p-bromobenzoyl-Aid-l-Phe-N'-iso-propylamide (1) exhibited shielded and solvent exposed amide protons indicative of a turn conformation. In the crystal lattice of 1
Evgeni Eltzov et al.
Analytical chemistry, 87(7), 3655-3661 (2015-03-17)
Indoor air pollution became a recent concern found to be oftentimes worse than outdoor air quality. We developed a tool that is cheap and simple and enables continuous monitoring of air toxicity. It is a biosensor with both a nondisposable
Hani Nasser Abdelhamid et al.
Analytica chimica acta, 767, 104-111 (2013-03-05)
Application of two new series of ionic liquid matrices (ILMs) based on the two most predominantly used conventional organic matrices (Sinapinic acid and 2,5-DHB) in conjugation with various bases (aniline (ANI), dimethyl aniline (DMANI), diethylamine (DEA), dicyclohexylamine (DCHA), pyridine (Pyr)
Andrés Castellanos-Martín et al.
Genome biology, 16, 40-40 (2015-04-09)
An essential question in cancer is why individuals with the same disease have different clinical outcomes. Progress toward a more personalized medicine in cancer patients requires taking into account the underlying heterogeneity at different molecular levels. Here, we present a
Md Mujahid et al.
Journal of proteome research, 14(2), 711-727 (2014-11-13)
Aromatic amines are widely distributed in the environment and are major environmental pollutants. Although degradation of aromatic amines is well studied in bacteria, physiological adaptations and stress response to these toxic compounds is not yet fully understood. In the present
Sylvie Mavel et al.
Bioorganic & medicinal chemistry, 20(4), 1388-1395 (2012-02-04)
The dopamine transporter (DAT) plays a pivotal role in the regulation of dopamine neurotransmission, and is involved in a number of physiological functions and brain disorders. Furthermore the DAT analysis by molecular imaging techniques is a useful tool for the
Si Chen et al.
Molecular bioSystems, 10(12), 3310-3321 (2014-10-16)
As a classical formula, Sini decoction (SND) has been fully proved to be clinically effective in treating doxorubicin (DOX)-induced cardiomyopathy. Current chemomics and pharmacology proved that the total alkaloids (TA), total gingerols (TG), total flavones and total saponins (TFS) are
Jin Wang et al.
Journal of nanoscience and nanotechnology, 13(1), 523-528 (2013-05-08)
The low bandgap 3-hexylthiophene/pyridine copolymers (P3HT/PY) were synthesized and the composites of P3HT/PY and CdSe QDs were prepared. The characterization are performed with 1H NMR, UV-vis, PL, TEM, XPS and cyclic voltammetry (CV). The results show that the P3HT/PY copolymers
Greg M Kowalski et al.
Biochimica et biophysica acta, 1851(2), 210-219 (2014-12-10)
Hepatic insulin resistance is a major risk factor for the development of type 2 diabetes and is associated with the accumulation of lipids, including diacylglycerol (DAG), triacylglycerols (TAG) and ceramide. There is evidence that enzymes involved in ceramide or sphingolipid
Akito Nishizawa et al.
The Biochemical journal, 462(2), 257-265 (2014-06-07)
The coenzyme specificity of enzymes is one of the critical parameters for the engineered production of biological compounds using bacteria. Since NADPH is produced abundantly in photosynthetic organisms, conversion of an NADH-specific enzyme into an NADPH-specific one is a useful
Harry Adams et al.
Journal of the American Chemical Society, 135(5), 1853-1863 (2013-01-31)
The association constants for a family of 96 closely related zinc porphyrin-pyridine ligand complexes have been measured in two different solvents, toluene and 1,1,2,2-tetrachloroethane (TCE). The zinc porphyrin receptors are equipped with phenol side arms, which can form intramolecular H-bonds
Hye-Youn Kim et al.
Molecules (Basel, Switzerland), 20(10), 18066-18082 (2015-10-09)
Chamaecyparis obtusa (CO) belongs to the Cupressaceae family, and it is found widely distributed in Japan and Korea. In this study, the anti-proliferative activities of the methanol and water extracts of CO leaves against a human colorectal cancer cell line
K F Ho et al.
Environmental pollution (Barking, Essex : 1987), 197, 316-324 (2014-12-01)
A sampling campaign was carried out at nine Chinese cities in 2010/2011. Fifteen monocarbonyls (C# = 1-9) were quantified. Temperature is the rate-determining factor of the summertime carbonyl levels. The carbonyl emissions in winter are mainly driven by the primary
Total syntheses of complanadines A and B.
Le Zhao et al.
Angewandte Chemie (International ed. in English), 52(6), 1722-1725 (2013-01-03)
Gregori Casals et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 960, 8-13 (2014-05-02)
Gas chromatography-mass spectrometry (GC-MS) remains as the gold-standard technique for the study of the steroid metabolome. A main limitation is the need of performing a derivatization step since incubation with strong silylations agents for long periods of time (usually 16
R S Sternal et al.
Investigative radiology, 27(12), 1040-1043 (1992-12-01)
Methyl tert-butyl ether (MTBE) is the solvent most commonly used for in vivo dissolution of cholesterol gallstones. Its limitations, however, include high volatility and flammability along with potential toxicologic concerns. Therapy may take several hours. This study was initiated to
Haoyu Liu et al.
Carbohydrate polymers, 113, 480-489 (2014-09-27)
Polymer design and selection are crucial to the development of amorphous solid dispersions (ASD) for solubilization of otherwise poorly water-soluble drugs. The matrix polymer is required to interact strongly at the molecular level with the drug to prevent recrystallization, but
Cyclostellettamines AF, pyridine alkaloids which inhibit binding of methyl quinuclidinyl benzilate (QNB) to muscarinic acetylcholine receptors, from the marine sponge, Stelletta maxima.
Fusetani N, et al.
Tetrahedron Letters, 35(23), 3967-3970 (1994)
Mohammed J Farooqi et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 153, 124-131 (2015-08-25)
Perylene diimide derivatives have attracted initial interest as industrial dyes. Recently, much attention has been focused on their strong π-π stacks resulting from the large PDI aromatic core. These PDI stacks have distinct optical properties, and provide informative models that
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