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Polymeric micelles have a whole set of unique characteristics, which make them very promising drug carriers, in particular, for poorly soluble drugs. Our review article focuses on micelles prepared from conjugates of water-soluble polymers, such as polyethylene glycol (PEG) or polyvinyl pyrrolidone (PVP), with phospholipids or long-chain fatty acids. The preparation of micelles from certain polymer-lipid conjugates and the loading of these micelles with various poorly soluble anticancer agents are discussed. The data on the characterization of micellar preparations in terms of their morphology, stability, longevity in circulation, and ability to spontaneously accumulate in experimental tumors via the enhanced permeability and retention (EPR) effect are presented. The review also considers the preparation of targeted immunomicelles with specific antibodies attached to their surface. Available in vivo results on the efficiency of anticancer drugs incorporated into plain micelles and immunomicelles in animal models are also discussed.
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http://dx.doi.org/10.1016/j.addr.2003.12.004 | DOI Listing |
Turk J Pharm Sci
September 2025
University of Maryland, Department of Pharmaceutical Sciences, Baltimore, USA.
Objectives: Norvir oral powder [ritonavir (RTV)] employs polyvinylpyrrolidone/vinyl acetate as the polymer to formulate an amorphous solid dispersion. Its oral absolute bioavailability is 70% in the fasted state, and it has negative food effects. The aim of this study was to perform in vitro dissolution of Norvir powder and Wagner-Nelson deconvolution of data under fasted, moderate fat, and high fat conditions in order to elucidate the relevance of dissolution testing.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
September 2025
Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA, 15213, USA.
α-Lipoic acid (LA) has recently emerged as an attractive, inexpensive monomer for synthesizing degradable polymers via ring-opening of its 1,2-dithiolane, introducing easily cleavable disulfide linkages into polymer backbones. Reversible addition-fragmentation chain transfer (RAFT) copolymerization with vinyl monomers enables access to degradable poly(disulfide)s with controlled molecular weights. However, conventional thermal RAFT methods suffer from oxygen sensitivity, limited LA incorporation (<40 mol%), and modest degrees of polymerization (DP < 300).
View Article and Find Full Text PDFCarbohydr Polym
November 2025
Department of Pharmaceutical Analysis, SVKM's Dr. Bhanuben Nanavati College of Pharmacy, Mumbai, Maharashtra 400056, India. Electronic address:
Gum Arabic (GA), a naturally occurring polysaccharide, has emerged as a promising biomaterial for drug delivery systems (DDS) due to its high water solubility, emulsifying capacity, biocompatibility, and biodegradability. Its structural richness in arabinogalactan facilitates strong interactions with biomolecules, enabling the development of various drug formulations including hydrogels, nanoparticles, liposomes, and emulsions. GA-based DDS have demonstrated significant potential in enhancing the solubility of poorly water-soluble drugs, protecting bioactive compounds from degradation, and enabling sustained and controlled drug release.
View Article and Find Full Text PDFAntiinflamm Antiallergy Agents Med Chem
September 2025
AISSMS College of Pharmacy, SPPU, Pune, India.
Background: Nonsteroidal anti-inflammatory drugs (NSAIDs) are commonly used to manage pain and inflammation but are associated with gastrointestinal and cardiovascular risks, especially with COX-2 inhibitors. Topical delivery systems offer a safer alternative by minimizing systemic exposure; however, poor solubility and limited skin penetration remain challenges. Enhancing solubility through solid dispersion and incorporating it into a gel formulation may improve permeability and therapeutic effectiveness, addressing the need for safer and more efficient topical NSAID delivery.
View Article and Find Full Text PDFBiomaterials
August 2025
Nebraska Translational Research Center (NTRC), Department of Growth and Development, College of Dentistry, University of Nebraska Medical Center, Omaha, NE, USA. Electronic address:
Large, complex wounds frequently exhibit suboptimal healing, leading to scarring and functional impairment. While bioactive materials and electrical stimulation (ES) show promise, their individual limitations call for novel approaches. This study investigates the combined effects of combining 4-aminopyridine (4AP) and electrical stimulation (ES) on human dermal fibroblasts (hDFBs) using a stable, ionically conductive (IC) chitosan-based scaffold for controlled drug delivery.
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