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https://www.readbyqxmd.com/read/29793073/bubble-generating-polymersomes-loaded-with-both-indocyanine-green-and-doxorubicin-for-effective-chemotherapy-combined-with-photothermal-therapy
#1
Dunwan Zhu, Fan Fan, Chenlu Huang, Zhiming Zhang, Yu Qin, Li Lu, Hai Wang, Xu Jin, Hanxue Zhao, Hu Yang, Chao Zhang, Jun Yang, Zhipeng Liu, Hongfan Sun, Xigang Leng, Deling Kong, Linhua Zhang
The combination of chemotherapy and photothermaltherapy (PTT) via stimuli-responsive nanovesicles has great potential in tumor treatment. In the present study, bubble-generating polymersomes, which can generate bubbles in response to low pH or hyperthermia, were fabricated to simultaneously encapsulate chemotherapeutic drug and photosensitizing agent for the synergistic chemo-photothermal tumor therapy. Photosensitizer indocyanine green (ICG) was encapsulated into the bilayer of polymersomes formed by amphiphilic triblock copolymer PCL8000 -PEG8000 -PCL8000 through thin film re-hydration method, while chemotherapeutic doxorubicin (DOX) was loaded into the hydrophilic lumen using a transmembrane ammonium bicarbonate gradient loading procedure...
May 21, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29792929/recent-advances-in-intra-articular-drug-delivery-systems-for-osteoarthritis-therapy
#2
REVIEW
Pierre Maudens, Olivier Jordan, Eric Allémann
Osteoarthritis (OA) is the most common degenerative disease of the joint. Despite many reports and numerous clinical trials, OA is not entirely understood, and there is no effective treatment available for this disease. To satisfy this unmet medical need, drug delivery systems (DDSs) containing disease-modifying OA drugs (DMOADs) for intra-articular (IA) administration are required to improve the health of OA patients. DDSs should provide controlled and/or sustained drug release, enabling long-term treatment with a reduced number of injections...
May 21, 2018: Drug Discovery Today
https://www.readbyqxmd.com/read/29792911/prolonged-drug-release-properties-for-orodispersible-films-by-combining-hot-melt-extrusion-and-solvent-casting-methods
#3
Isabell Speer, Maren Preis, Jörg Breitkreutz
Orodispersible films (ODFs) are an advantageous dosage form to accomplish patient convenience and compliance in oral drug delivery. They provide a number of special application features, such as the ease of administration without water and suitability for patients with swallowing problems. However, this promising dosage form has been limited to immediate release formulations so far. The aim of this study was to develop a thin film produced by solvent casting, which is rapidly disintegrating when placed in the mouth, but which provides prolonged drug release characteristics by incorporating drug-loaded matrix particles (MPs)...
May 21, 2018: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/29792888/oral-vitamin-a-coupled-valsartan-nanomedicine-high-hepatic-stellate-cell-receptors-accessibility-and-prolonged-enterohepatic-residence
#4
Nesrine S El-Mezayen, Wessam F El-Hadidy, Wessam M El-Refaie, Thanaa I Shalaby, Mahmoud M Khattab, Aiman S El-Khatib
So far, liver fibrosis still has no clinically-approved treatment. The loss of stored vitamin-A (VA ) in hepatic stellate cells (HSCs), the main regulators to hepatic fibrosis, can be applied as a mechanism for their targeting. Valsartan is a good candidate for this approach; it is a marketed oral-therapy with inverse- and partial-agonistic activity to the over-expressed angiotensin-II type1 receptor (AT1R) and depleted nuclear peroxisome proliferator-activated receptor-gamma (PPAR-γ), respectively, in activated HSCs...
May 21, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29792353/gastroretentive-raft-liquid-delivery-system-as-a-new-approach-to-release-extension-for-carrier-mediated-drug
#5
Samar M Abouelatta, Ahmed A Aboelwafa, Omaima N El-Gazayerly
Gabapentin (GBP), an antiepileptic and anti-neuropathic agent, suffers from short half-life (5-7 h), has narrow absorption window, and is absorbed via carrier-mediated mechanism resulting in frequent dosing, poor compliance, and poor bioavailability (<60%). Moreover, GBP is a freely water-soluble drug, thus it is considered a challenging candidate to be formulated as extended release dosage form. In this study, raft forming systems were investigated as a potential drug delivery system for prolonging gastric residence time of GBP...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29792199/nanoparticle-delivery-of-grape-seed-derived-proanthocyanidins-to-airway-epithelial-cells-dampens-oxidative-stress-and-inflammation
#6
S Castellani, A Trapani, A Spagnoletta, L di Toma, T Magrone, S Di Gioia, D Mandracchia, G Trapani, E Jirillo, M Conese
BACKGROUND: Chronic respiratory diseases, whose one of the hallmarks is oxidative stress, are still incurable and need novel therapeutic tools and pharmaceutical agents. The phenolic compounds contained in grape are endowed with well-recognized anti-oxidant, anti-inflammatory, anti-cancer, and anti-aging activities. Considering that natural anti-oxidants, such as proanthocyanidins, have poor water solubility and oral bioavailability, we have developed a drug delivery system based on solid lipid nanoparticles (SLN), apt to encapsulate grape seed extract (GSE), containing proanthocyanidins...
May 23, 2018: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29792144/biomedical-applications-of-aromatic-azo-compounds-from-chromophore-to-pharmacophore
#7
Yousaf Ali, Shafida Abd Hamid, Umer Rashid
Azo dyes are widely used in textile, fiber, cosmetic, leather, paint and printing industries. Besides their characteristic coloring function, biological properties of certain azo compounds including antibacterial, antiviral, antifungal and cytotoxic are also reported. Azo compounds can be used as drug carriers, either by acting as a 'cargo' that entrap therapeutic agents or by prodrug approach. The drug is released by internal or external stimuli in the region of interest, as observed in colon-targeted drug delivery...
May 23, 2018: Mini Reviews in Medicinal Chemistry
https://www.readbyqxmd.com/read/29792023/fern-9-11-ene-2%C3%AE-3%C3%AE-diol-action-on-insulin-secretion-in-hyperglycemic-conditions
#8
Allisson Jhonatan Gomes Castro, Luisa Helena Cazarolli, Gabrielle Da Luz, Delsi Altenhofen, Hemily Batista Da Silva, Francieli Kanumfre Carvalho, Moacir Geraldo Pizzolatti, Fátima Rmb Silva
The objective of this study was to investigate the effect and the mechanism of action of fernenediol as insulin secretagogue. Wistar rats were treated with 0.1; 1 and 10 mg/kg fernenediol and then induced hyperglycemia by oral glucose. The glycaemia, insulin, LDH, calcium and hepatic glycogen were analyzed. Considering the intestine and pancreas as targets for the triterpene action, the duodenum was used to verify the influence of fernenediol on intestinal glycosidases. Additionally, pancreatic islets were used for studies of 14 C-deoxyglucose uptake and influx of 45 Ca2+ in hyperglycemic medium with/without fernenediol in the presence/absence of an inhibitor/activator of KATP channels, glibenclamide, diazoxide, nifedipine, calcium chelator (BAPTA- AM) and H-89 and ST the inhibitors of the PKA and PKC enzymes...
May 24, 2018: Biochemistry
https://www.readbyqxmd.com/read/29791923/inhaled-treprostinil-prodrug-lipid-nanoparticle-formulations-provide-long-acting-pulmonary-vasodilation
#9
Franziska G Leifer, Donna M Konicek, Kuan-Ju Chen, Adam J Plaunt, Dany Salvail, Charles E Laurent, Michel R Corboz, Zhili Li, Richard W Chapman, Walter R Perkins, Vladimir S Malinin
Treprostinil (TRE), a prostanoid analogue approved in the USA for the treatment of pulmonary arterial hypertension, requires continuous infusion or multiple dosing sessions per day for inhaled and oral routes of administration due to its short half-life. The inhaled drug is known to induce adverse systemic and local effects including headache, nausea, cough, and throat irritation which may be due at least in part to transiently high drug concentrations in the lungs and plasma immediately following administration [1]...
May 23, 2018: Drug Research
https://www.readbyqxmd.com/read/29791921/does-gastroplus-support-similarity-and-dissimilarity-factors-of-in-vitro-in-vivo-prediction-in-biowaiver-studies-a-lower-strength-amlodipine-as-a-model-drug
#10
Abdel Naser Zaid, Naser Shraim, Asmaa Radwan, Nidal Jaradat, Samah Hirzallah, Ibrahim Issa, Aya Khraim
BACKGROUND: Many generic pharmaceutical products are currently available on the market place worldwide. Recently, there is a growing concern on the quality and efficacy of generic products. However, health care professionals such as physicians and pharmacists are in difficult situations to choose among alternatives. PURPOSE: The aim of this study is to assess the effectiveness of the in silico technique (Gastro Plus® ) in the biowaiver study and whether similarity and dissimilarity factors ( f 2 and f 1 respectively) are effective in this regard...
May 23, 2018: Drug Research
https://www.readbyqxmd.com/read/29791876/extraction-and-characterization-of-cashew-tree-anacardium-occidentale-gum-use-in-aceclofenac-dental-pastes
#11
M Saquib Hasnain, Poonam Rishishwar, Sanjay Rishishwar, Sadath Ali, Amit Kumar Nayak
In the current work, the usefulness of extracted cashew tree gum (CG) as pharmaceutical excipient in dental pastes containing AC (for the pain management in the periodontitis) was investigated. CG was extracted from crude exudate of cashew tree (Anacardium occidentale, family: Anacardiaceae) (yield 19.22%). Physicochemical characteristics like colour, odour, taste, solubility, pH and viscosity of extracted CG were estimated; the phytochemical identification tests indicated the presence of carbohydrates and mucilage within it...
May 20, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29791874/fabrication-of-electrospun-poly-vinyl-alcohol-dextran-nanofibers-via-emulsion-process-as-drug-delivery-system-kinetics-and-in-vitro-release-study
#12
A Meera Moydeen, M Syed Ali Padusha, Eman F Aboelfetoh, Salem S Al-Deyab, Mohamed H El-Newehy
A green method was used for the fabrication of coaxial nanofibers for use in biomedical applications. Coaxial nanofiber mats were fabricated by emulsion electrospinning from poly(vinyl alcohol) (PVA) and Dextran sulfate (Dex) blends loaded with ciprofloxacin (Cipro) as a model drug dissolved in edible oil. The ratio of the PVA/Dex mixture was optimized and nanofibers were stabilized against disintegration in water by thermal treatment at 120 °C. The morphology of the prepared nanofibers was observed by scanning electron microscopy and the structure of the core-shell nanofibers was confirmed by transmission electron microscopy...
May 20, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29791241/neutrophil-mediated-delivery-of-pixantrone-loaded-liposomes-decorated-with-poly-sialic-acid-octadecylamine-conjugate-for-lung-cancer-treatment
#13
Xiang Luo, Ling Hu, Huangliang Zheng, Mingqi Liu, Xinrong Liu, Cong Li, Qiujun Qiu, Zitong Zhao, Xiaobo Cheng, Chaoyang Lai, Yuqing Su, Yihui Deng, Yanzhi Song
Poly(sialic acid) (PSA) is a natural hydrophilic biodegradable and non-immunogenic biopolymer, receptors for its monomer are expressed on peripheral blood neutrophils (PBNs), which plays important roles in the progression and invasion of tumors. A poly(sialic acid)-octadecylamine conjugate (PSA-ODA) was synthesized and then anchor it on the surface of liposomal pixantrone (Pix-PSL), to achieve an improved anticancer effect. The liposomes were prepared using a remote loading method via a pH gradient, and then assessed for particle size, zeta potential encapsulation efficiency, in vitro release, and in vitro cytotoxicity...
November 2018: Drug Delivery
https://www.readbyqxmd.com/read/29790797/curcumin-loaded-redox-responsive-mesoporous-silica-nanoparticles-for-targeted-breast-cancer-therapy
#14
Nana Li, Zhi Wang, Yongtai Zhang, Kai Zhang, Jianxu Xie, Ying Liu, Wansi Li, Nianping Feng
HYPOTHESIS: The antitumor applications of curcumin (CUR) are limited because of its low water solubility, poor stability, and low bioavailability. We developed novel nanocarrier systems for tumour targeting and controlled CUR release and evaluated their therapeutic efficacy. EXPERIMENTS: The surface of mesoporous silica nanoparticles (MSN) was modified with hyaluronan (HA) or polyethyleneimine-folic acid (PEI-FA) via disulfide bonds. The capacity of the resultant nanocarriers (MSN-HA and MSN-PEI-FA, respectively) for CUR delivery was evaluated in a breast cancer cell line and a mouse xenograft model...
May 23, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29790738/design-and-development-of-polysaccharide-doxorubicin-peptide-bioconjugates-for-dual-synergistic-effects-of-integrin-targeted-and-cell-penetrating-peptides-for-cancer-chemotherapy
#15
Alexandra A P Mansur, Sandhra Maria Carvalho, Zelia Ines Portela Lobato, Maria de Fátima Leite, Armando da Silva Cunha, Herman S Mansur
Polymer-drug conjugation is an attractive approach for target delivering insoluble and highly toxic drugs to tumor sites to overcome the side-effects caused by cancer chemotherapy. In this study we designed and synthesized novel polymer-drug-peptide conjugates for improved specificity on targeting cancer cells. Chemically modified polysaccharide, carboxymethylcellulose (CMC), was conjugated with doxorubicin (DOX) anticancer drug by amide bonds and dually biofunctionalized with integrin-target receptor tripeptide (RGD) and L-arginine (R) as cell-penetrating amino acid for synergistic targeting and enhancing internalization by cancer cells...
May 23, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29790525/dna-decorated-cu-9-s-5-nanoparticles-as-nir-light-responsive-drug-carriers-for-tumor-chemo-phototherapy
#16
Shuang Liang, Zhongxi Xie, Yi Wei, Ziyong Cheng, Yanqiu Han, Jun Lin
Recently, near-infrared (NIR) light responsive drug delivery systems have attracted much attention for tumor therapy. Herein, we have successfully constructed a smart nanocarrier system Cu9S5-PEI-DNA-DOX (labelled as CPD-DOX) based on the self-assembly of hydrophobic Cu9S5 nanoparticles (NPs), poly(ethylene imine) (PEI), double-stranded DNA (dsDNA) segments and the anti-cancer drug doxorubicin (DOX). Among them, Cu9S5 NPs can serve as a nano-transducer for absorbing and converting near-infrared light to heat...
May 23, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29790395/hyaluronic-acid-conjugated-ph-sensitive-liposomes-for-targeted-delivery-of-prednisolone-on-rheumatoid-arthritis-therapy
#17
Virgínia M Gouveia, José Lopes-de-Araújo, Sofia A Costa Lima, Cláudia Nunes, Salette Reis
AIM: The treatment of rheumatoid arthritis remains a challenge as available therapies still entail the risk of deleterious off-target effects. The present study describes hyaluronic acid-conjugated pH-sensitive liposomes as an effective drug delivery-targeting strategy to synovial cells. MATERIALS & METHODS: Therapeutic, cytotoxic and targeting potential of developed liposomes were studied in vitro using macrophages and fibroblasts cell lines. RESULTS & CONCLUSION: Results suggest an enhanced cellular uptake of conjugated liposomes, mainly mediated by caveolae- and clathrin-dependent endocytosis...
May 2018: Nanomedicine
https://www.readbyqxmd.com/read/29790262/the-efficacy-and-tolerability-of-5-aminolevulinic-acid-5-thermosetting-gel-photodynamic-therapy-pdt-in-the-treatment-of-mild-to-moderate-acne-vulgaris-a-two-center-prospective-assessor-blinded-proof-of-concept-study
#18
Stefano Maria Serini, Maria Vittoria Cannizzaro, Annunziata Dattola, Virginia Garofalo, Esther Del Duca, Alessandra Ventura, Massimo Milani, Elena Campione, Luca Bianchi
BACKGROUND: Acne vulgaris is a chronic inflammatory skin disease, commonly treated with topical or systemic drugs, according to the severity of the condition. Retinoids and antibiotic compounds are considered cornerstone approaches in this condition. However, low adherence to the therapy and the issue of bacterial resistance undermine the efficacy in the long term. Photodynamic therapy (PDT) with 20% aminolevulinic acid (ALA) has shown to be effective in the treatment of inflammatory acne...
May 22, 2018: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29790019/development-of-a-topical-48-h-release-formulation-as-an-anti-scarring-treatment-for-deep-partial-thickness-burns
#19
Rossella Dorati, Jorge L Medina, Patrick P DeLuca, Kai P Leung
The purpose of this study was to develop pirfenidone (PF) ointment formulations for a dose finding study in the prophylactic treatment of deep partial-thickness burns in a mouse model. A preformulation study was performed to evaluate the solubility of PF in buffers and different solvents and its stability. Three different formulations containing 1, 3.5, and 6.5% w/w PF were prepared and optimized for their composition for testing in mice. Optimized formulations showed promising in vitro release profiles, in which 20-45% of PF was released in the first 7 h and 70-90% released within 48 h...
May 11, 2018: AAPS PharmSciTech
https://www.readbyqxmd.com/read/29790010/pectin-and-mucin-enhance-the-bioadhesion-of-drug-loaded-nanofibrillated-cellulose-films
#20
Patrick Laurén, Heli Paukkonen, Tiina Lipiäinen, Yujiao Dong, Timo Oksanen, Heikki Räikkönen, Henrik Ehlers, Päivi Laaksonen, Marjo Yliperttula, Timo Laaksonen
PURPOSE: Bioadhesion is an important property of biological membranes, that can be utilized in pharmaceutical and biomedical applications. In this study, we have fabricated mucoadhesive drug releasing films with bio-based, non-toxic and biodegradable polymers that do not require chemical modifications. METHODS: Nanofibrillar cellulose and anionic type nanofibrillar cellulose were used as film forming materials with known mucoadhesive components mucin, pectin and chitosan as functional bioadhesion enhancers...
May 22, 2018: Pharmaceutical Research
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