Farmacologia, Toxicologia i Química Terapèutica: Envíos recientes
Mostrando ítems 321-340 de 675
Reduced Self-Perception of Fatigue after Intake of Panax ginseng Root Extract (G115®) Formulated with Vitamins and Minerals An Open-Label Study
Background: Unexplained fatigue is a common complaint. When underlying disease causes have been eliminated, lifestyle measures and supplementation can be indicated. Elaborating on clinical findings that G115®, a dry extract ...
Enhanced vitamin C skin permeation from supramolecular hydrogels, illustrated using in situ ToF-SIMS 3D chemical profiling
<p>Vitamin C (ascorbic acid) is a naturally occurring, powerful anti-oxidant with the potential to deliver numerous</p><p>benefits to the skin when applied topically. However, topical use of this compound is currently ...
Endothelin-1 promotes vascular smooth muscle cell migration across the artery wall: a mechanism contributing to vascular remodelling and intimal hyperplasia in giant-cell arteritis
Background: Giant-cell arteritis (GCA) is an inflammatory disease of large/medium-sized arteries, frequently involving the temporal arteries (TA). Inflammation-induced vascular remodelling leads to vaso-occlusive events. ...
Cyclocondensation reactions of racemic diastereomers of dimethyl-2-oxocyclohexanepropionic acids with (R)-phenylglycinol: access to both enantiomers of dimethyl cis-decahydroquinolines
Starting from racemic diastereomeric mixtures of dimethyl-2-oxocyclohexanepropionic acids (4-6) the synthesis of enantiopure 7,8-, 6,8-, and 5,8-dimethyl-substituted cis-decahydroquinolines (11, 13, and 15) and their ...
Metal-Catalyzed Hydrogen Atom Transfer (MHAT) Hydroalkylation with Electron-Deficient Alkynes
We present a novel strategy for olefin construction via the reductive coupling of electron-neutral alkenes with electron-deficient alkynes under metal-catalyzed hydrogen atom transfer conditions. This methodology provides ...
Protective Role of a Donepezil-Huprine Hybrid against the β-Amyloid (1-42) Effect on Human Erythrocytes
Aβ(1-42) peptide is a neurotoxic agent strongly associated with the etiology of Alzheimer's disease (AD). Current treatments are still of very low effectiveness, and deaths from AD are increasing worldwide. Huprine-derived ...
YAT2150 is irresistible in <em>Plasmodium falciparum</em> and active against <em>Plasmodium vivax</em> and <em>Leishmania </em>clinical isolates
We recently characterized the potent antiplasmodial activity of the aggregated protein dye YAT2150, whose presumed mode of action is the inhibition of protein aggregation in the malaria parasite. Using single-dose and ...
Exploring the influence of silicon oxide microchips shape on cellular uptake using imaging flow cytometry
Nano- and micro-carriers of therapeutic molecules offer numerous advantages for drug delivery, and the shape of these</p><p>particles plays a vital role in their biodistribution and their interaction with cells. However, ...
Chronic Mild Stress Modified Epigenetic Mechanisms Leading to Accelerated Senescence and Impaired Cognitive Performance in Mice
Cognitive and behavioural disturbances are a growing public healthcare issue for the modern society, as stressful lifestyle is becoming more and more common. Besides, several pieces of evidence state that environment is ...
1,2-Diaryl(3-pyridyl)ethanone Oximes. Intermolecular Hydrogen Bonding Networks Revealed by X-ray Diffraction
The synthesis of a set of 1-aryl-2-aryl(3-pyridyl)ethanones 1-5 and thecorresponding ketoximes 6-9 is reported. Structural studies of oximes 6, 7 and 9 wereperformed in solution using 1H-NMR and in the solid state by X-ray ...
A metabolic perspective of late onset Alzheimer's disease
After decades of research, the molecular neuropathology of Alzheimer's disease (AD) is still one of the hot topics in biomedical sciences. Some studies suggest that soluble amyloid β (Aβ) oligomers act as causative agents ...
An experimental and computational investigation of the elusive anhydrous form of Oxyma-B
We report the crystal structure of the anhydrous form of Oxyma-B, a relevant racemization suppressor for peptide synthesis, solved by direct space methodologies with X-Ray Powder Diffraction data. The structure had remained ...
Chlorpyrifos oxon activates glutamate and lysine for protein cross-linking
Chronic low-dose exposure to organophosphorus (OP) toxicants is correlated with an increase in the risk of impaired cognition and neurodegenerative diseases. A mechanism to explain this relationship is needed. We suggest ...
Role of amino terminal substitutions in the pharmacological, rewarding and psychostimulant profiles of novel synthetic cathinones
The emergence of new synthetic cathinones continues to be a matter of public health concern. In fact, they are quickly replaced by new structurally related alternatives. The main goal of the present study was to characterize ...
Antimicrobial and Photoantimicrobial Activities of Chitosan/CNPPV Nanocomposites
Multidrug-resistant bacteria represent a global health and economic burden that urgently calls for new technologies to combat bacterial antimicrobial resistance. Here, we developed novel nanocomposites (NCPs) based on ...
Intracellular Mechanical Drugs Induce Cell-Cycle Altering and Cell Death
Current advances in materials science have demonstrated that extracellular mechanical cues can define cell function and cell fate. However, a fundamental understanding of the manner in which intracellular mechanical cues ...
Clinical and Pharmacokinetic Profile of Lithium Monotherapy in Exclusive Breastfeeding. A Follow-Up Case Series
Background: Most guidelines advise that women taking lithium should not breastfeed. The variation in transfer is just one reason behind this advice. Objectives: To present clinical and pharmacokinetic data of nine mother-infant ...
Epigenetic alterations in hippocampus of SAMP8 senescent mice and modulation by voluntary physical exercise
The senescence-accelerated SAMP8 mouse model displays features of cognitive decline and Alzheimer's disease. With the purpose of identifying potential epigenetic markers involved in aging and neurodegeneration, here we ...
Toward the Synthesis of Phormidolides
A convergent and stereoselective approach for the synthesis of marine natural product (MNP) phormidolide D (PM D) is proposed. Two main disconnections divided PM D in three molecular fragments: the macrocyclic core 4, the ...
Origin of the selectivity in the ring-closing metathesis step of the synthesis of (−)-callyspongiolide: Formation of fourteen-versus eight-membered rings
In previous work we reported the formal synthesis of the marine macrolide (−)-callyspongiolide through a synthetic approach in which the generation of the key macrocyclic core relies on a ruthenium-catalyzed ring-closing ...
