The properties of the liposome membrane as a reaction field were investigated by focusing on the Horner-Wadsworth-Emmons reaction as a case study. Use of the liposomes existing in the gel phase resulted in the enhanced activity of the substrates and furnished the products with same E/Z stereoselectivity as in the liposome-free system. The membrane environment in the gel phase most likely assisted the formation of adducts that induced selective generation of the E-isomer. The possible role of liposomes is to assist the proton removal from the reactant, rather than providing the basic interfacial environment.
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http://dx.doi.org/10.1016/j.jbiosc.2019.01.015 | DOI Listing |
Int J Pharm
December 2024
School of Pharmacy, Jiangsu University, Zhenjiang, Jiangsu 212013, PR China. Electronic address:
Alzheimer's disease (AD) is a neurodegenerative disease that is significantly characterized by cognitive and memory impairments, which worsen significantly with age. In the late stages of AD, metal ion disorders and an imbalance of reactive oxygen species (ROS) levels occur in the brain microenvironment, which causes abnormal aggregation of β-amyloid (Aβ), leading to a significant worsening of the AD symptoms. Therefore, we designed a composite nanomaterial of macrophage membranes-encapsulated Prussian blue nanoparticles (PB NPs/MM).
View Article and Find Full Text PDFEur J Pharm Sci
December 2024
Institute of Pharmaceutical Sciences, University of Freiburg, 79104 Freiburg im Breisgau, Germany; Andreas Hettich GmbH & Co. KG, 78532 Tuttlingen, Germany.
Thermosensitive liposomes (TSLs) have great potential for the selective delivery of cytostatic drugs to the tumor site with greatly reduced side effects. Here we report the discovery and characterization of new thermosensitive small multilamellar lipid nanoparticles (tSMLPs) with unusually high temperature selectivity. Furthermore, the temperature-dependent release of the fluorescent marker calcein from tSMLPs is enhanced by human serum albumin.
View Article and Find Full Text PDFMembranes (Basel)
December 2024
Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland.
This article investigates the influence of dopant molecules on the structural and dynamic properties of lipid bilayers in liposomes, with a focus on the effects of dopant concentration, size, and introduced electric charge. Experimental studies were performed using electron paramagnetic resonance (EPR) spectroscopy with spin probes, complemented by Monte Carlo simulations. Liposomes, formed via lecithin sonication, were doped with compounds of varying concentrations and analyzed using EPR spectroscopy to assess changes in membrane rigidity.
View Article and Find Full Text PDF3 Biotech
January 2025
Department of Botony, P.S.R College of Education, Sivakasi, Tamilnadu India.
This study aims to assess the neuroprotective effects of the methanolic extract of against oxidative stress and cell death induced by neurotoxins MPP in SH-SY5Y cells. Briefly, the methanolic extract of decreased the cytotoxicity of MPP in SH-SY5Y cells. Treatment with extract at a concentration of 400 µg/ml resulted in a notable decrease in cell death, particularly in MPP -induced cells.
View Article and Find Full Text PDFAm J Physiol Cell Physiol
December 2024
Department of Molecular & Integrative Physiology, University of Michigan, Ann Arbor, MI, USA.
Plasma membrane repair (PMR) restores membrane integrity of cells, preventing cell death in vital organs, and has been studied extensively in skeletal muscle. Dysferlin, a sarcolemmal Ca-binding protein, plays a crucial role in PMR in skeletal muscle. Previous studies have suggested that PMR employs membrane trafficking and membrane fusion, similar to neurotransmission.
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