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https://www.readbyqxmd.com/read/28806055/selective-release-system-for-antioxidative-and-anti-inflammatory-activities-using-h2o2-responsive-therapeutic-nanoparticles
#1
A Young Kim, Ji Hoon Ha, Soo Nam Park
We developed nanoparticles that were degraded by H2O2, a reactive oxygen species (ROS), to study a drug delivery system that targets damaged skin cells with oxidative stress and inflammation. In this study, tyrosol-incorporated copolyoxalate (TPOX) was synthesized by using 1,4-cyclohexanedimethanol, 4-(2-hydroxyethyl)phenol (tyrosol) and oxalyl chloride (Mw ~8835 Da). In vitro drug release behavior was assessed by loading nile red, a lipophilic fluorescent material such as quercetin, into the TPOX nanoparticles...
August 14, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28805147/a-comparison-of-transdermal-over-the-counter-lidocaine-3-6-menthol-1-25-rx-lidocaine-5-and-placebo-for-back-pain-and-arthritis
#2
Eric Castro, David Dent
AIM: Transdermal lidocaine therapy has become a gold standard as part of a treatment regimen for patients who suffer from localized pain. We compared transdermal patches: over-the-counter (OTC) lidocaine 3.6% combined with menthol 1.25%, prescription lidocaine 5% (Rx) and placebo. METHODS: In a double-blind, placebo-controlled trial, 87 patients were randomized to: OTC, Rx or placebo. RESULTS: OTC met primary end points of noninferiority compared with Rx for efficacy, side effects and quality of life...
August 14, 2017: Pain Management
https://www.readbyqxmd.com/read/28805098/assessment-of-the-permeability-and-toxicity-of-polymeric-nanocapsules-using-the-zebrafish-model
#3
Carmen Teijeiro-Valiño, Elena Yebra-Pimentel, Jorge Guerra-Varela, Noemi Csaba, María J Alonso, Laura Sánchez
AIM: To assess the capacity of a new drug delivery nanocapsule (NC) with a double shell of hyaluronic acid and protamine to overcome biological barriers using the zebrafish model. MATERIALS & METHODS: NCs were prepared by the solvent displacement method, tagged with fluorescent makers and physicochemically characterized. Toxicity was evaluated according to the Fish Embryo Acute Toxicity test, and permeability was tested by exposing zebrafish, with and without chorion, to the fluorescent NCs...
August 14, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28802793/pickering-emulsions-stabilized-by-biodegradable-block-copolymer-micelles-for-controlled-topical-drug-delivery
#4
Faiza Laredj-Bourezg, Marie-Alexandrine Bolzinger, Jocelyne Pelletier, Yves Chevalier
Surfactant-free biocompatible and biodegradable Pickering emulsions were investigated as vehicles for skin delivery of hydrophobic drugs. O/w emulsions of medium-chain triglyceride (MCT) oil droplets loaded with all-trans retinol as a model hydrophobic drug were stabilized by block copolymer nanoparticles: either poly(lactide)-block-poly(ethylene glycol) (PLA-b-PEG) or poly(caprolactone)-block-poly(ethylene glycol) (PCL-b-PEG). Those innovative emulsions were prepared using two different processes allowing drug loading either inside oil droplets or inside both oil droplets and non-adsorbed block copolymer nanoparticles...
August 9, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28800544/protease-loaded-permeation-enhancer-liposomes-for-treatment-of-skin-fibrosis-arisen-from-second-degree-burn
#5
Kamini Sahu, Monika Kaurav, Ravi Shankar Pandey
Cysteine protease (papain) is a plant derived enzyme and due to its collagenolytic activity has potential in fibrosis reduction. However, a major hurdle in its use as fibrosis reducing agent is to overcome stratum corneum skin barrier via topical application, owing to its hydrophilic and high molecular weight and protein nature which is prone to degradation. The aim of the present study was to develop a penetration enhancer incorporated drug delivery system, i.e. propylene glycol (PG) liposomes, loaded with papain for application in fibrosis therapy...
August 8, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28796918/hydrogel-carbon-nanotubes-needle-free-device-for-electrostimulated-skin-delivery
#6
Jean-François Guillet, Emmanuel Flahaut, Muriel Golzio
The permeability of skin allows passive diffusion across the epidermis to reach blood vessels but this is possible only for small molecules such as nicotine. In order to achieve transdermal delivery of large molecules such as insulin or plasmid DNA, permeability of the skin and mainly the permeability of stratum corneum has to be increased. Moreover, alternative routes that avoid the use of needles will improve the quality of life of patients. A method named "electropermeabilization" has been shown to increase skin permeability...
August 10, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28796657/microneedling-a-review-and-practical-guide
#7
Tina S Alster, Paul M Graham
BACKGROUND: Microneedling is a relatively new treatment option in dermatology and has been touted for a broad range of applications including skin rejuvenation, acne scarring, rhytides, surgical scars, dyschromia, melasma, enlarged pores, and transdermal drug delivery. The significant increase in minimally invasive procedures that has been reported over the past several years suggest that microneedling may occupy a specific niche for patients who desire measurable clinical results from treatments with little to no recovery...
August 7, 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28794954/cationic-supramolecular-hydrogels-for-overcoming-the-skin-barrier-in-drug-delivery
#8
David Limón, Claire Jiménez-Newman, Mafalda Rodrigues, Arántzazu González-Campo, David B Amabilino, Ana C Calpena, Lluïsa Pérez-García
A cationic bis-imidazolium-based amphiphile was used to form thermoreversible nanostructured supramolecular hydrogels incorporating neutral and cationic drugs for the topical treatment of rosacea. The concentration of the gelator and the type and concentration of the drug incorporated were found to be factors that strongly influenced the gelling temperature, gel-formation period, and overall stability and morphology. The incorporation of brimonidine tartrate resulted in the formation of the most homogeneous material of the three drugs explored, whereas the incorporation of betamethasone resulted in a gel with a completely different morphology comprising linked particles...
August 2017: ChemistryOpen
https://www.readbyqxmd.com/read/28794647/cefazolin-potency-against-methicillin-resistant-staphylococcus-aureus-a-microbiologic-assessment-in-support-of-a-novel-drug-delivery-system-for-skin-and-skin-structure-infections
#9
David P Nicolau, Barry N Silberg
INTRODUCTION: Despite aggressive medical and surgical management, the resolution of skin and skin structure infections is often difficult due to insufficient host response, reduced drug penetration, and a high prevalence of resistance organisms such as methicillin-resistant Staphylococcus aureus (MRSA). As a result of these factors, conventional management often consists of prolonged broad-spectrum systemic antimicrobials. An alternative therapy in development, ultrasonic drug dispersion (UDD), uses a subcutaneous injection followed by external trans-cutaneous ultrasound to deliver high tissue concentrations of cefazolin with limited systemic exposure...
2017: Infection and Drug Resistance
https://www.readbyqxmd.com/read/28776220/nanostructured-lipid-carriers-to-enhance-transdermal-delivery-and-efficacy-of-diclofenac
#10
Chien Ngoc Nguyen, Thi Thuy Trang Nguyen, Hanh Thuy Nguyen, Tuan Hiep Tran
Lipid carrier-mediated transdermal drug delivery offers several advantages because it is non-irritating and non-toxic, provides effective control of drug release, and forms an adhesive film that hydrates the outer skin layers. However, to penetrate the deeper skin layers, these formulations need to overcome several barriers in the stratum corneum. This study evaluates factors influencing particle size and drug-loading capacity, which play a key role in drug permeation and efficacy. Diclofenac sodium was chosen as the model drug...
August 3, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28774086/neo-geometric-copper-nanocrystals-by-competitive-dual-surfactant-mediated-facet-adsorption-controlling-skin-permeation
#11
Karmani Murugan, Yahya E Choonara, Pradeep Kumar, Lisa C du Toit, Viness Pillay
Neogeometric copper nanoparticles (CuNPs) have various applications yet its synthesis still proves to be challenging with regards to self-assembly and uniformity control. This study aimed to synthesize shape-specific CuNPs in the biomedical application of ascertaining skin permeation and retention of the CuNPs as a drug delivery system. The approach to the shape design involved the dual control of two surfactants to direct the shape organisation of the nanoparticles (NPs) while an interesting aspect of the study showed the competitive adsorption of the surfactants onto the nanocrystal facets to direct facet growth...
November 28, 2016: Materials
https://www.readbyqxmd.com/read/28770536/preparation-and-in-vivo-evaluation-of-lecithin-based-microparticles-for-topical-delivery-of-minoxidil
#12
Hyo-Jung Lee, Dong-Won Oh, Min-Ju Na, Dong-Wook Kim, Dong-Yeon Yuk, Hyoung-Chul Choi, Yong-Beom Lee, Kun Han, Chun-Woong Park
Minoxidil is widely used for treatment of androgenic alopecia. Commercial products containing minoxidil are usually in solution form. Repeated applications of minoxidil solution can lead to adverse effects such as skin irritation and horniness. The aims of this study were to prepare lecithin-based microparticle in minoxidil solution for enhancement of minoxidil topical delivery and skin protection and evaluate the ability of lecithin on in vitro delivery, in vivo hair growth, and skin trouble improvement compared to commercial minoxidil solution...
August 2, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28764984/broad-overview-of-engineering-of-functional-nanosystems-for-skin-delivery
#13
Ana Henriques Mota, Patrícia Rijo, Jesús Molpeceres, Catarina Pinto Reis
Nanotechnology involves the engineering of functional systems at nanoscale and it can be described as a collection of methods and techniques for processing materials to create products with special physicochemical properties. The rapid developments in nanotechnology have allowed the incorporation of therapeutic agents, actives for cosmetic, sensing agents into nanoparticles, for detection, prevention, and treatment of skin diseases. Nanoparticles promote the increase of penetration of drugs and many cosmetic chemicals across the skin...
July 29, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28763772/ph-responsive-chitosan-nanoparticles-from-a-novel-twin-chain-anionic-amphiphile-for-controlled-and-targeted-delivery-of-vancomycin
#14
Rahul S Kalhapure, Mahantesh Jadhav, Sanjeev Rambharose, Chunderika Mocktar, Sanil Singh, Jwala Renukuntla, Thirumala Govender
The design and synthesis of novel pH-responsive nanoantibiotics is an emerging research area to address the antibiotic resistance crisis. The purpose of this study was therefore to synthesize a new anionic gemini surfactant (AGS) that could result in the formulation of pH-responsive chitosan nanoparticles (CSNPs) to treat methicillin-resistant Staphylococcus aureus (MRSA) infections. The coupling of oleic acid with 2,2-dimethyl-5,5-bis(hydroxymethyl)-1,3-dioxane and subsequent deprotection followed by a reaction with succinic anhydride and sodium bicarbonate yielded AGS...
July 24, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28761825/gellified-emulsion-of-ofloxacin-for-transdermal-drug-delivery-system
#15
Swati Jagdale, Saylee Pawar
Purpose: Ofloxacin is a fluoroquinolone with broad-spectrum antibacterial action, used in treatment of systemic and local infections. Ofloxacin is BCS class II drug having low solubility, high permeability with short half-life. The present work was aimed to design, develop and optimize gellified emulsion of Ofloxacin to provide site targeted drug delivery. Transdermal drug delivery will enhance the bioavailability of the drug giving controlled drug release. Methods: Transdermal drug delivery system was designed with gelling agent (Carbopol 940 and HPMC K100M), oil phase (oleic acid) and emulsifying agent (Tween 80: Span 80)...
June 2017: Advanced Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/28761343/elastic-liposomes-as-novel-carriers-recent-advances-in-drug-delivery
#16
REVIEW
Afzal Hussain, Sima Singh, Dinesh Sharma, Thomas J Webster, Kausar Shafaat, Abdul Faruk
Elastic liposomes (EL) are some of the most versatile deformable vesicular carriers that comprise physiologically biocompatible lipids and surfactants for the delivery of numerous challenging molecules and have marked advantages over other colloidal systems. They have been investigated for a wide range of applications in pharmaceutical technology through topical, transdermal, nasal, and oral routes for efficient and effective drug delivery. Increased drug encapsulation efficiency, enhanced drug permeation and penetration into or across the skin, and ultradeformability have led to widespread interest in ELs to modulate drug release, permeation, and drug action more efficiently than conventional drug-release vehicles...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28759859/temperature-responsive-nanogel-multilayers-of-poly-n-vinylcaprolactam-for-topical-drug-delivery
#17
Oleksandra Zavgorodnya, Carlos A Carmona-Moran, Veronika Kozlovskaya, Fei Liu, Timothy M Wick, Eugenia Kharlampieva
We report nanothin temperature-responsive hydrogel films of poly(N-vinylcaprolactam) nanoparticles (νPVCL) with remarkably high loading capacity for topical drug delivery. Highly swollen (νPVCL)n multilayer hydrogels, where n denotes the number of nanoparticle layers, are produced by layer-by-layer hydrogen-bonded assembly of core-shell PVCL-co-acrylic acid nanoparticles with linear PVPON followed by cross-linking of the acrylic acid shell with either ethylene diamine (EDA) or adipic acid dihydrazide (AAD)...
July 22, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28757424/evaluation-of-chemical-modified-hydrogel-formulation-for-topical-suitability
#18
Flavia Laffleur
BACKGROUND: Skin delivery and transdermal delivery are key ambitions of the pharmaceutical and cosmetically researchers. AIM: The study aimed to chemically modify well-known polymeric gelling agents in order to boost their topical suitability by fostering their dermal adhesiveness. METHODS: Conventional chitosan was modified via amide bound formation with sulfhydryl compound thioglycolic acid. Subsequently, preactivated chitosan conjugate was established by preactivation of chitosan-thioglycolic acid with mercaptonicotinamide being covalently attached via disulfide bond linkage...
July 27, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28754611/transdermal-delivery-of-gentamicin-using-dissolving-microneedle-arrays-for-potential-treatment-of-neonatal-sepsis
#19
Patricia González-Vázquez, Eneko Larrañeta, Maelíosa T C McCrudden, Courtney Jarrahian, Annie Rein-Weston, Manjari Quintanar-Solares, Darin Zehrung, Helen McCarthy, Aaron J Courtenay, Ryan F Donnelly
Neonatal infections are a leading cause of childhood mortality in low-resource settings. World Health Organization guidelines for outpatient treatment of possible serious bacterial infection (PSBI) in neonates and young infants when referral for hospital treatment is not feasible include intramuscular gentamicin (GEN) and oral amoxicillin. GEN is supplied as an aqueous solution of gentamicin sulphate in vials or ampoules and requires health care workers to be trained in dose calculation or selection of an appropriate dose based on the patient's weight band and to have access to safe injection supplies and appropriate sharps disposal...
July 25, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28754510/mesoporous-silica-nanoparticles-as-a-promising-skin-delivery-system-for-methotrexate
#20
Simona Sapino, Simonetta Oliaro-Bosso, Daniele Zonari, Andrea Zattoni, Elena Ugazio
The systemic administration of methotrexate (MTX), a commonly used, antineoplastic drug which is also used in cutaneous disorders, is primarily associated with prolonged retention in the body and consequently with side effects. Innovative drug delivery techniques and alternative administration routes would therefore contribute to its safe and effective use. The general objective of this study is thus the development of MTX-based preparations for the topical treatment of skin disorders. MCM-41-like nanoparticles (MSN), are herein proposed as carriers which can improve the cutaneous absorption and hence the bioavailability and efficacy of MTX...
July 25, 2017: International Journal of Pharmaceutics
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