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Journal of Liposome Research

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https://www.readbyqxmd.com/read/28480807/tri-block-co-polymer-nanocarriers-for-enhancement-of-oral-delivery-of-felodipine-preparation-in-vitro-characterization-and-ex-vivo-permeation
#1
Sinar Sayed Fouad, Basant A Habib, Ghada M Elsayed
This study aimed to prepare, optimize and characterize a novel felodipine- loaded polymeric nanomicelles, using a pluronic mixture of F127 and P123. Thin-film hydration method was adopted for the preparation of different polymeric nanomicelles (T1-T12) according to a 4(1).3(1) full factorial design. Factors studied were: Pluronic ®: drug ratio (P:D ratio) (10, 20, 30 and 40 w/w) and percent of hydrophilic polymer (F127%) (33.33%, 50% and 66.67% w/w). Optimization criteria were to maximize transmittance percent (T%) and entrapment efficiency percent (EE%) and to minimize particle size (PS) and polydispersity index (PDI)...
May 7, 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/28480778/ptd-modified-paclitaxel-anti-resistant-liposomes-for-treatment-of-drug-resistant-non-small-cell-lung-cancer
#2
Rui-Jun Ju, Lan Cheng, Yao Xiao, Xin Wang, Cui-Qing Li, Xiao-Ming Peng, Xue-Tao Li
CONTEXT: Non-small cell lung carcinoma (NSCLC) is a type of epithelial lung cancer that accounts for approximately 80-85% of lung carcinoma cases. Chemotherapy for the NSCLC is unsatisfactory due to multidrug resistance, nonselectively distributions and the accompanying side effects. OBJECTIVE: The objective of this study was to develop a kind of PTD modified paclitaxel anti-resistant liposomes to overcome these chemotherapy limitations. METHOD: The studies were performed on LLT cells and resistant LLT cells in vitro and on NSCLC xenograft mice in vivo, respectively...
May 7, 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/28480760/tissue-pharmacokinetics-and-pharmacodynamics-of-ambisome%C3%A2-l-ambis-in-uninfected-and-infected-animals-and-their-effects-on-dosing-regimens
#3
J P Adler-Moore, R T Proffitt, J A Olson, G M Jensen
By selecting a unique combination of lipids and amphotericin B, the liposome composition for AmBisome (L-AmBis) has been optimized resulting in a formulation that is minimally toxic, targets to fungal cell walls, and distributes into and remains for days to weeks in various host tissues at drug levels above the MIC for many fungi. Procedures have been standardized to ensure that large scale production of the drug retains the drug's low toxicity profile, favorable pharmacokinetics and antifungal efficacy. Tissue accumulation and clearance with single or multiple intravenous administration is similar in uninfected and infected animal species, with tissue accumulation being dose-dependent and the liver and spleen retaining the most drug...
May 7, 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/28337938/optimization-and-development-of-antidiabetic-phytosomes-by-box-benhken-design
#4
Sushila Rathee, Anjoo Kamboj
Researchers have extensively reviewed on herbs and natural products for their marked clinical efficacy in some recent years, however maximum of the newly discovered bioactive constituents offer poor bioavailability due to their large size molecules or to their poor miscibility with oils and lipids, thereby limiting their ability to pass across the lipid-rich outer membranes of the enterocytes of the small intestine (Mukherjee and Wahile, 2006). Phytosomes are more bioavailable as compared to herbal extracts owing to their enhanced capacity to cross the bio-membranes and thus reaching the systemic circulation...
March 24, 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/28287014/preparation-and-optimization-of-tablets-containing-a-self-nano-emulsifying-drug-delivery-system-loaded-with-rosuvastatin
#5
Heba F Salem, Rasha M Kharshoum, Abdel Khalek A Halawa, Demiana M Naguib
BACKGROUND: Rosuvastatin (ROS) calcium is the latest synthetic drug in the statin group that has an anti-hyperlipidemic activity. It is available as tablets, and its poor aqueous solubility, slow dissolution rate and low-absorption extent result in less than 20% bioavailability and about 80% being excreted unchanged in the feces without absorption. OBJECTIVE: To utilize nanotechnology to reformulate ROS as a self-nano-emulsifying drug delivery system (SNEDDS), and utilizing design optimization to fabricate the SNEDDS as a tablet...
March 13, 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/28276279/the-immune-stimulation-capacity-of-liposome-treated-red-blood-cells
#6
Luciana da Silveira Cavalcante, Donald R Branch, Trang T Duong, Rae S M Yeung, Jason P Acker, Jelena L Holovati
Our in vivo studies on a rat model established safety of transfusing liposome-treated red blood cells (RBCs) but identified the potential for immune modulation as related to transfusion efficacy of liposome-treated RBCs. The aim of this study was at assessing the impact of liposome-induced membrane changes on the immune profile of liposome-treated RBCs by (a) evaluating their interaction with endothelial cells and monocytes; and (b) the resulting immune response derived from this interaction, in the form of cytokine release, adhesion molecules expression and phagocytosis...
March 9, 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/28264602/enhancement-of-the-bioavailability-of-an-antihypertensive-drug-by-transdermal-protransfersomal-system-formulation-and-in-vivo-study
#7
Nadia M Morsi, Ahmed A Aboelwafa, Marwa H S Dawoud
Timolol Maleate (TiM), a nonselective β-adrenergic blocker, is a potent highly effective agent for management of hypertension. The drug suffers from poor oral bioavailability (50%) due to its first pass effect and a short elimination half-life of 4 h; resulting in its frequent administration. Transdermal formulation may circumvent these problems in the form of protransfersomes. The aim of this study is to develop and optimize transdermal protransfersomal system of Timolol Maleate by film deposition on carrier method where protransfersomes were converted to transfersomes upon skin hydration following transdermal application under occlusive conditions...
March 6, 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/28067107/physical-properties-and-biological-interactions-of-liposomes-developed-as-a-drug-carrier-in-the-field-of-regenerative-medicine
#8
Sławomir Lewicki, Monika Leśniak, Eugeniusz Krzysztof Machaj, Małgorzata Antos-Bielska, Elżbieta Anna Trafny, Janusz Kocik, Zygmunt Pojda
Liposomes are used for encapsulation of the active compounds in different therapies, with the increasing frequency. The important areas of clinical applications of liposomes are cancer targeted treatment, antibiotic delivery or regenerative medicine. The liposomes can transfer both hydrophilic and hydrophobic compounds and have the lipid bilayer which imitates the cell membrane. Liposomes additionally may extend half-live period of drugs and protect them against the elimination in different ways, such as phagocytosis, enzymatic cleavage or exclusion by detoxification...
June 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/28067087/oral-delivery-of-allopurinol-niosomes-in-treatment-of-gout-in-animal-model
#9
Neelu Singh, Poonam Parashar, Chandra Bhushan Tripathi, Jovita Kanoujia, Gaurav Kaithwas, Shubhini A Saraf
CONTEXT: Gout is a painful disorder which does not have an efficient delivery system for its treatment. OBJECTIVE: Development and in vitro, in vivo evaluation of allopurinol-loaded nonionic surfactant-based niosomes was envisaged. MATERIALS AND METHODS: Niosomes were prepared with Span 20 and Tween 20 (1:1 molar ratio) using ether injection method. The formulations were screened for entrapment efficiency, particle size analysis, zeta potential, release kinetics, in vivo activity, and stability studies...
June 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/27558454/design-and-development-of-ph-responsive-hspc-c12h25-paa-chimeric-liposomes
#10
Nikolaos Naziris, Natassa Pippa, Anastasia Meristoudi, Stergios Pispas, Costas Demetzos
The application of stimuli-responsive medical practices has emerged, in which pH-sensitive liposomes figure prominently. This study investigates the impact of the incorporation of different amounts of pH-sensitive polymer, C12H25-PAA (poly(acrylic acid) with a hydrophobic end group) in l-α-phosphatidylcholine, hydrogenated (Soy) (HSPC) phospholipidic bilayers, with respect to biomimicry and functionality. PAA is a poly(carboxylic acid) molecule, classified as a pH-sensitive polymer, whose pH-sensitivity is attributed to its regulative -COOH groups, which are protonated under acidic pH (pKa ∼4...
June 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/27250110/sensitization-of-multidrug-resistant-malignant-cells-by-liposomes-co-encapsulating-doxorubicin-and-chloroquine-through-autophagic-inhibition
#11
Menghua Gao, Yuzhen Xu, Liyan Qiu
Adenosine triphosphate (ATP)-binding cassette (ABC) transporters play a key role in the development of multidrug resistance (MDR) in cancer cells. P-glycoprotein (P-gp) and multidrug resistance-associated protein 1 (MRP1) are important proteins in this superfamily which are widely expressed on the membranes of multidrug resistance (MDR) cancer cells. Besides, upregulation of cellular autophagic responses is considered a contributing factor for MDR in cancer cells. We designed a liposome system co-encapsulating a chemotherapeutic drug (doxorubicin hydrochloride, DOX) and a typical autophagy inhibitior (chloroquine phosphate, CQ) at a weight ratio of 1:2 and investigated its drug resistance reversal mechanism...
June 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/27184460/pegylated-niosomes-mediated-drug-delivery-systems-for-paeonol-preparation-pharmacokinetics-studies-and-synergistic-anti-tumor-effects-with-5-fu
#12
Rui-Xi He, Xi Ye, Rui Li, Wei Chen, Tao Ge, Tian-Qing Huang, Xiang-Jiang Nie, He-Jun-Tao Chen, Dai-Yin Peng, Wei-Dong Chen
This work describes the preparation of a PEGylated niosomes-mediated drug delivery systems for Paeonol, thereby improving the bioavailability and chemical stability of Paeonol, prolonging its cellular uptake and enhancing its synergistic anti-cancer effects with 5-Fu. PEGylated niosomes, which are prepared from biocompatible nonionic surfactant of Spans 60 and cholesterol, and modified with PEG-SA. Pae-PEG-NISVs were evaluated in vitro and in vivo. The cytotoxicity of Pae-PEG-NISVs was investigated against HepG2 cells...
June 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/27079800/design-and-evaluation-of-proniosomes-as-a-carrier-for-ocular-delivery-of-lomefloxacin-hcl
#13
Rawia M Khalil, Ghada A Abdelbary, Mona Basha, Ghada E A Awad, Hadeer A El-Hashemy
The current investigation aims to develop and evaluate novel ocular proniosomal gels of lomefloxacin HCl (LXN); in order to improve its ocular bioavailability for the management of bacterial conjunctivitis. Proniosomes were prepared using different types of nonionic surfactants solely and as mixtures with Span 60. The formed gels were characterized for entrapment efficiency, vesicle size, and in vitro drug release. Only Span 60 was able to form stable LXN-proniosomal gel when used individually while the other surfactants formed gels only in combination with Span 60 at different ratios...
June 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/27050330/structures-similar-to-lipid-emulsions-and-liposomes-dipalmitoylphosphatidylcholine-cholesterol-tween-20-span-20-or-tween-80-span-80-in-aqueous-media
#14
Carlos Juárez-Osornio, Jesús Gracia-Fadrique
In the present work, we show that we obtained nanometric structures made of water, 1,2-dipalmitoyl-sn-glycero-3-phosphatidylcholine (DPPC), cholesterol (Chol), and a mixture of ethoxylated and non-ethoxylated sorbitan fatty acid esters (Tween 20, Span 20, Tween 80, and Span 80) by mixing all of them near the cloud point temperature (cp) of the ethoxylated surfactant. The influence that the constituents had on the size of the particle was determined by a pseudo-ternary phase diagram of water/Tween-Span/DPPC-Chol; the colloidal particles obtained were studied by differential scanning calorimetry, confocal fluorescence microscopy, scanning electron microscopy, and atomic force microscopy...
June 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/26982164/tumor-delivery-of-liposomal-doxorubicin-prepared-with-poly-l-glutamic-acid-as-a-drug-trapping-agent
#15
Andang Miatmoko, Kumi Kawano, Hitomi Yoda, Etsuo Yonemochi, Yoshiyuki Hattori
CONTEXT: Poly-l-glutamic acid (PGA) is an anionic polymer with a large number of carboxyl groups that can interact electrostatically with cationic drugs such as doxorubicin (DOX). OBJECTIVE: For stable encapsulation of DOX into liposomes, we prepared triethylamine (TEA)-PGA-liposomes using PGA as an internal trapping agent. METHODS: We prepared TEA-PGA-liposomes by remote loading of DOX with a TEA gradient into preformed liposomes prepared with 1, 2, or 4 mg/mL PGA (molecular weights 4800, 9800, and 20 500), and evaluated their biodistribution and antitumor effects on Lewis lung carcinoma (LLC) tumor-bearing mice...
June 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/26981843/introduction-of-cationic-virosome-derived-from-vesicular-stomatitis-virus-as-a-novel-gene-delivery-system-for-sf9-cells
#16
Yahya Mohammadzadeh, Shima Gholami, Narges Rasouli, Sahar Sarrafzadeh, Nasim Sadat Seyed Tabib, Mohammad Hasan Samiee Aref, Asghar Abdoli, Peyvand Biglari, Fatemeh Fotouhi, Behrokh Farahmand, Masoumeh Tavassoti Kheiri, Abbas Jamali
Insect-derived cell lines are used extensively to produce recombinant proteins because they are capable of performing a range of post-translational modifications. Due to their significance in biotechnological applications, various methods have been developed to transfect them. In this study, we introduce a virosome constructed from vesicular stomatitis virus (VSV) as a new delivery system for sf9 cells. We labeled these VSV virosomes by fluorescent probe Rhodamine B chloride (R18). By fluorescence microscope observation and conducting a fusion assay, we confirmed the uptake of VSV virosomes via endocytosis by sf9 cells and their fusion with the endosomal membrane...
June 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/27173947/micro-spherical-cochleate-composites-method-development-for-monodispersed-cochleate-system
#17
Kalpa Nagarsekar, Mukul Ashtikar, Frank Steiniger, Jana Thamm, Felix H Schacher, Alfred Fahr
Cochleates have been of increasing interest in pharmaceutical research due to their extraordinary stability. However the existing techniques used in the production of cochleates still need significant improvements to achieve sufficiently monodispersed formulations. In this study, we report a simple method for the production of spherical composite microparticles (3-5 μm in diameter) made up of nanocochleates from phosphatidylserine and calcium (as binding agent). Formulations obtained from the proposed method were evaluated using electron microscopy and small angle X-ray scattering and were compared with conventional cochleate preparation techniques...
March 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/27126194/liposomal-butamben-gel-formulations-toxicity-assays-and-topical-anesthesia-in-an-animal-model
#18
Cintia Maria Saia Cereda, Viviane Aparecida Guilherme, Melissa Inger Alkschbirs, Rui Barbosa de Brito Junior, Giovana Radomille Tofoli, Michelle Franz-Montan, Daniele Ribeiro de Araujo, Eneida de Paula
The aim of this study was to evaluate the in vitro cytotoxicity and the in vivo analgesic effect and local toxicity of the local anesthetic butamben (BTB) encapsulated in conventional or elastic liposomes incorporated in gel formulations. The results showed that both gel formulations of liposomal BTB reduced the cytotoxicity (p < 0.001; one-way ANOVA/Tukey's test) and increased the topical analgesic effect (p < 0.05; one-way ANOVA/Tukey's test) of butamben, compared to plain BTB gel. The gel formulations presented good rheological properties, and stability assays detected no differences in physicochemical stability up to 30 d after preparation...
March 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/27055898/effect-of-liposome-treated-red-blood-cells-in-an-anemic-rat-model
#19
Luciana da Silveira Cavalcante, Qingping Feng, Ian Chin-Yee, Jason P Acker, Jelena L Holovati
CONTEXT: Liposomes have been shown to improve human red blood cell (RBC) in vitro quality by minimizing membrane damage occurring during 42-d hypothermic storage. Small animal models are necessary to evaluate novel blood products and guide future clinical studies. OBJECTIVES: The aim of this study was to assess the effect of liposome treatments on rat RBC hypothermic storage lesion (HSL) and to examine in vivo outcomes of transfusing liposome treated RBCs in a rat model...
March 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/27031365/a-lyophilized-sterically-stabilized-liposome-containing-docetaxel-in-vitro-and-in-vivo-evaluation
#20
Yuchao Chen, Jing Chen, Yi Cheng, Lihua Luo, Pinjing Zheng, Yidan Tong, Zhao Li
OBJECTIVES: In this study, an improved lyophilized PEGylated liposomal formulation of docetaxel (DOC) has been developed. METHODS: PEGylated docetaxel liposome (PL-DOC) was prepared by thin-film evaporation method and lyophilization. The effect of various components of the lipids and their compatibility with DOC on the entrapment efficiency (EE) of liposome was investigated. The lyophilized PL-DOC was characterized by morphology, particle size, zeta potential, EE, release in vitro and stability...
March 2017: Journal of Liposome Research
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