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Interactions between PEI and biological polyanions and the ability of glycosaminoglycans in destabilizing PEI/peGFP-C3 polyplexes for genetic material release.
Int J Biol Macromol
January 2025
Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35000 Rennes, France. Electronic address:
The lack of understanding of polyplexes stability and their dissociation mechanisms, allowing the release of DNA, is currently a major limitation in non-viral gene delivery. One proposed mechanism for DNA-based polyplexes dissociation is based on the electrostatic interactions between polycations and biological polyanions, such as glycosaminoglycans (GAGs). This work aimed at investigating whether GAGs such as heparin, chondroitin sulphate and hyaluronic acid promote the dissociation of PEI/DNA polyplexes.
View Article and Find Full Text PDFThe Role of Light Irradiation and Dendrimer Generation in Directing Electrostatic Self-Assembly.
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Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials, Friedrich-Alexander Universität Erlangen-Nürnberg, Egerlandstr. 3, 91058 Erlangen, Germany.
pH-responsive polyamidoamine (PAMAM) dendrimers are used as well-defined building blocks to design light-switchable nano-assemblies in solution. The complex interplay between the photoresponsive di-anionic azo dye Acid Yellow 38 (AY38) and the cationic PAMAM dendrimers of different generations is presented in this study. Electrostatic self-assembly involving secondary dipole-dipole interactions provides well-defined assemblies within a broad size range (10 nm-1 μm) with various shapes.
View Article and Find Full Text PDFThymoquinone-loaded Nanosized Ethosomal-based Hydrogels: Their Preparation, Characterization, in Vitro, Ex Vivo, and Antimicrobial Evaluation against Staphylococcus aureus.
Curr Med Chem
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Department of Pharmaceutical Sciences, Shalom Institute of Health & Allied Sciences, Sam Higginbottom University of Agriculture, Technology & Sciences, Allahabad, 211007, Uttar Pradesh, India.
Background: Thymoquinone (TQ) is found in the seeds of Nigella sativa. It has immunomodulatory, antibacterial, anti-inflammatory, antioxidant, astringent, antifungal, and antihistaminic properties, making it a highly valuable compound of interest. However, the use of it as a therapeutic drug is highly challenging because of its poor solubility, low bioavailability, and short-term stability.
View Article and Find Full Text PDFThermoresponsive dual-network chitosan-based hydrogels with demineralized bone matrix for controlled release of rhBMP9 in the treatment of femoral head osteonecrosis.
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Key Lab of Modern Toxicology of Ministry of Education, Center for Global Health, School of Public Health, Nanjing Medical University, 101 Longmian Avenue, Nanjing 211166, China. Electronic address:
In an effort to mitigate or reverse the pathological progression of early-stage osteonecrosis of the femoral head (ONFH), this study employed a promising strategy that involves the sustained delivery of osteogenic factors to augment core decompression, facilitated by the use of composite hydrogels. Specifically, a hydrogel was synthesized by blending chitosan, Pluronic F-127, and tripolyphosphate, utilizing both ionic bonding and copolymer micelle cross-linking techniques. This hydrogel demonstrated exceptional biocompatibility, temperature responsiveness, pH-dependent biodegradation, and controlled release properties.
View Article and Find Full Text PDFEffective removal of As from aqueous medium using date palm fiber biochar/chitosan/glutamine nanocomposite: kinetic and thermodynamic studies.
Environ Sci Pollut Res Int
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Chemistry Department, Faculty of Science, Damanhour University, Damanhour, Egypt.
In the current work, three adsorbent materials were developed: biochar derived from date palm fiber (C), date palm fiber biochar/chitosan nanoparticles (CCS), and biochar/chitosan nanoparticle composite supplemented with glutamine (CCSG). These compounds were used as solid adsorbents to remove As from polluted water. Several characterization approaches were used to investigate all the synthesized solid adsorbents, including thermogravimetric analysis, N adsorption/desorption isotherm, scanning electron microscopy, transmission electron microscopy (TEM), attenuated total reflectance with Fourier transform infrared, and zeta potential.
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