keyword
MENU ▼
Read by QxMD icon Read
search

Liposomes characterization

keyword
https://www.readbyqxmd.com/read/28331495/development-and-in-vitro-evaluation-of-liposomes-using-soy-lecithin-to-encapsulate-paclitaxel
#1
Thi Lan Nguyen, Thi Hiep Nguyen, Dai Hai Nguyen
The formulation of a potential delivery system based on liposomes (Lips) formulated from soy lecithin (SL) for paclitaxel (PTX) was achieved (PTX-Lips). At first, PTX-Lips were prepared by thin film method using SL and cholesterol and then were characterized for their physiochemical properties (particle size, polydispersity index, zeta potential, and morphology). The results indicated that PTX-Lips were spherical in shape with a dynamic light scattering (DLS) particle size of 131 ± 30.5 nm. Besides, PTX was efficiently encapsulated in Lips, 94...
2017: International Journal of Biomaterials
https://www.readbyqxmd.com/read/28322795/a-comprehensive-lipid-binding-and-activity-validation-of-a-cancer-specific-peptide-peptoid-hybrid-pps1
#2
Tanvi J Desai, D Gomika Udugamasooriya
We recently identified a peptide-peptoid hybrid, PPS1, which recognizes lipids that have an overall negative charge, such as phosphatidylserine (PS), phosphatidylglycerol (PG), phosphatidic acid (PA), and phosphatidylinositol (PI), but that does not bind to neutral lipids, such as phosphatidylcholine (PC), phosphatidylethanolamine (PE), and sphingomyelin (SM). The simple dimeric version of PPS1, PPS1D1, displayed strong cytotoxicity to cancer cells over normal cells in vitro and tumor burden in vivo. In this study, we comprehensively characterized the direct binding and activity of PPS1 on PS, PG, and PA using liposome-based assays and lung cancer cell lines that express these negatively charged lipids...
March 18, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28315446/targeted-delivery-of-morin-a-dietary-bioflavanol-encapsulated-mannosylated-liposomes-to-the-macrophages-of-adjuvant-induced-arthritis-rats-inhibits-inflammatory-immune-response-and-osteoclastogenesis
#3
Farhath Sultana, Manoj Kumar Neog, MahaboobKhan Rasool
The purpose of the study was to develop a liposomal drug delivery system for morin, a dietary polyphenol, in order to target the synovial macrophages and investigate the remission of disease severity in the adjuvant-induced arthritic (AIA) rats. To do so, mannose decorated liposomal morin (ML-Morin) was prepared using the thin film hydration method and the physicochemical properties were characterized. The particle size and zeta potential of liposomal morin (L-Morin) was found to be 127.9nm ± 2.6 and -24.5mV ± 0...
March 14, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28302582/characterization-of-pegylated-and-non-pegylated-liposomal-formulation-for-the-delivery-of-hypoxia-activated-vinblastine-n-oxide-for-the-treatment-of-solid-tumors
#4
Vidhi M Shah, Duc X Nguyen, Adel Alfatease, Shay Bracha, Adam Wg Alani
Solid tumors often contain hypoxic regions which are resistant to standard chemotherapy and radiotherapy. We have developed a liposomal delivery system for a prodrug of vinblastine (CPD100) which converts to the parent compound only in the presence of lower oxygen levels. As a part of this work we have developed and optimized two formulations of CPD100: one composed of sphingomyelin/cholesterol (55/45; mol/mol) (CPD100Li) and the other composed of sphingomyelin/cholesterol/PEG (55/40/5; mol/mol) (CPD100 PEGLi)...
March 14, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28295319/preparation-pharmacokinetics-and-tumour-suppressive-activity-of-berberine-liposomes
#5
Xinghui Wang, Qiong Wang, Zhihui Liu, Xiao Zheng
OBJECTIVES: Berberine (BBR) has shown promising antitumour effects in vitro. However, intravenous administration of BBR solution is complicated by lethal adverse cardiovascular effects. The aim of this study was to prepare common and polyethylene glycol (PEG)-modified long-circulating BBR liposomes and evaluate their efficacy and safety as potential antitumour agents. METHODS: Physiochemical properties of common and long-circulating BBR liposomes were characterized including particle size, Zeta potential and thermal stability...
March 15, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28292872/targeting-different-monocyte-macrophage-subsets-has-no-impact-on-outcome-in-experimental-stroke
#6
Antje Schmidt, Jan-Kolja Strecker, Stephanie Hucke, Nils-Martin Bruckmann, Martin Herold, Matthias Mack, Kai Diederich, Wolf-Rüdiger Schäbitz, Heinz Wiendl, Luisa Klotz, Jens Minnerup
BACKGROUND AND PURPOSE: Peripheral immune cell infiltration contributes to neural injury after ischemic stroke. However, in contrast to lymphocytes and neutrophils, the role of different monocyte/macrophage subsets remains to be clarified. Therefore, we evaluated the effects of selective and unselective monocyte/macrophage depletion and proinflammatory (M1-) and anti-inflammatory (M2-) macrophage transfer on the outcome after experimental cerebral ischemia. METHODS: To assess short-term effects of monocytes/macrophages in acute ischemic stroke, mice underwent transient middle cerebral artery occlusion and received either clodronate liposomes for unselective macrophage depletion, MC-21-antibody for selective depletion of proinflammatory Ly-6C(high) monocytes, or proinflammatory (M1-) or anti-inflammatory (M2-) macrophage transfer...
March 14, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28287501/evaluation-of-maltose-based-cationic-liposomes-with-different-hydrophobic-tails-for-plasmid-dna-delivery
#7
Bo Li, Liangliang Deng, Meiyan Liu, Youlin Zeng
In this paper, three cationic glycolipids with different hydrophobic chains Malt-DiC12MA (IX a), Malt-DiC14MA (IX b) and Malt-DiC16MA (IX c) were constructed by using maltose as starting material via peracetylation, selective 1-O-deacetylation, trichloroacetimidation, glycosylation, azidation, deacetylation, Staudinger reaction, tertiary amination and quaternization. Target compounds and some intermediates were characterized by ¹H-NMR, (13)C-NMR, ¹H-¹H COSY and ¹H-(13)C HSQC. The results of gel electrophoresis assay, atomic force microscopy images (AFM) and dynamic light scattering (DLS) demonstrate that all the liposomes could efficiently bind and compact DNA (N/P ratio less than 2) into nanoparticles with proper size (88 nm-146 nm, PDI < 0...
March 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28278586/recent-advances-on-liposomal-nanoparticles-synthesis-characterization-and-biomedical-applications
#8
Yunes Panahi, Masoud Farshbaf, Majid Mohammadhosseini, Mozhdeh Mirahadi, Rovshan Khalilov, Siamak Saghfi, Abolfazl Akbarzadeh
Liposome is a new nanostructure for the encapsulation and delivery of bioactive agents. There are a lot of bioactive materials that could be incorporated into liposomes including cosmetics, food ingredients, and pharmaceuticals. Liposomes possess particular properties such as biocompatibility, biodegradability; accompanied by their nanosize they have potential applications in nanomedicine, cosmetics, and food industry. Nanoliposome technology offers thrilling chances for food technologists in fields including encapsulation and controlled release of food ingredients, also improved bioavailability and stability of sensitive materials...
February 8, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28276785/a-critical-review-about-methodologies-for-the-analysis-of-mucoadhesive-properties-of-drug-delivery-systems
#9
Jéssica Bassi da Silva, Sabrina Barbosa de Souza Ferreira, Osvaldo de Freitas, Marcos Luciano Bruschi
Mucoadhesion is a useful strategy for drug delivery systems, such as tablets, patches, gels, liposomes, micro/nanoparticles, nanosuspensions, microemulsions and colloidal dispersions. Moreover, it has contributed to many benefits like increased residence time at application sites, drug protection, increased drug permeation and improved drug availability. In this context, investigation into the mucoadhesive properties of pharmaceutical dosage forms is fundamental, in order to characterize, understand and simulate the in vivo interaction between the formulation and the biological substrate, contributing to the development of new mucoadhesive systems with effectiveness, safety and quality...
March 1, 2017: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/28273850/chitosan-based-nanomedicine-to-fight-genital-candida-infections-chitosomes
#10
Toril Andersen, Ekaterina Mishchenko, Gøril Eide Flaten, Johanna U Ericson Sollid, Sofia Mattsson, Ingunn Tho, Nataša Škalko-Basnet
Vaginal infections are associated with high recurrence, which is often due to a lack of efficient treatment of complex vaginal infections comprised of several types of pathogens, especially fungi and bacteria. Chitosan, a mucoadhesive polymer with known antifungal effect, could offer a great improvement in vaginal therapy; the chitosan-based nanosystem could both provide antifungal effects and simultaneously deliver antibacterial drugs. We prepared chitosan-containing liposomes, chitosomes, where chitosan is both embedded in liposomes and surface-available as a coating layer...
March 4, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28266607/actual-fusion-efficiency-in-the-lipid-mixing-assay-comparison-between-nanodiscs-and-liposomes
#11
Claire François-Martin, Frédéric Pincet
Lipid exchange occurs between membranes during fusion or active lipid transfer. These processes are necessary in vivo for the homeostasis of the cell at the level of the membranes, the organelles and the cell itself. They are also used by the cell to interact with the surrounding medium. Several assays have been developed to characterize in vitro these processes on model systems. The most common one, relying on fluorescence dequenching, measures lipid mixing between small membranes such as liposomes or nanodiscs in bulk...
March 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28265100/sensory-domain-contraction-in-histidine-kinase-cita-triggers-transmembrane-signaling-in-the-membrane-bound-sensor
#12
Michele Salvi, Benjamin Schomburg, Karin Giller, Sabrina Graf, Gottfried Unden, Stefan Becker, Adam Lange, Christian Griesinger
Bacteria use membrane-integral sensor histidine kinases (HK) to perceive stimuli and transduce signals from the environment to the cytosol. Information on how the signal is transmitted across the membrane by HKs is still scarce. Combining both liquid- and solid-state NMR, we demonstrate that structural rearrangements in the extracytoplasmic, citrate-sensing Per-Arnt-Sim (PAS) domain of HK CitA are identical for the isolated domain in solution and in a longer construct containing the membrane-embedded HK and lacking only the kinase core...
March 6, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28260952/pharmaceutical-characterization-of-novel-tenofovir-liposomal-formulations-for-enhanced-oral-drug-delivery-in-vitro-pharmaceutics-and-caco-2-permeability-investigations
#13
Crystal B Spinks, Ahmed S Zidan, Mansoor A Khan, Muhammad J Habib, Patrick J Faustino
Tenofovir, currently marketed as the prodrug tenofovir disoproxil fumarate, is used clinically to treat patients with HIV/AIDS. The oral bioavailability of tenofovir is relatively low, limiting its clinical effectiveness. Encapsulation of tenofovir within modified long-circulating liposomes would deliver this hydrophilic anti-HIV drug to the reticuloendothelial system for better therapeutic efficacy. The objectives of the current study were to prepare and pharmaceutically characterize model liposomal tenofovir formulations in an attempt to improve their bioavailability...
2017: Clinical Pharmacology: Advances and Applications
https://www.readbyqxmd.com/read/28257810/anti-her2-immunoliposomes-for-co-delivery-of-paclitaxel-and-rapamycin-for-breast-cancer-therapy
#14
Josimar O Eloy, Raquel Petrilli, Deise L Chesca, Fabiano P Saggioro, Robert J Lee, Juliana Maldonado Marchetti
Breast cancer is the second leading cause of cancer deaths among women. Paclitaxel (PTX) is used for its treatment, however non-selectivity, rapid systemic clearance and hypersensitivity to the commercially available formulation are major drawbacks. Rapamycin (RAP), an mTOR inhibitor, acts synergistically with PTX, and thus could be used in combination with it. Drug loading into nanocarriers, particularly liposomes, has proven to enhance efficacy and reduce side-effects of chemotherapeutic drugs. Within this context, the functionalization of liposomes with antibodies for overexpressed receptors on tumor surface is a potential strategy to increase specificity and reduce side-effects...
February 28, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28257571/induction-of-chiral-recognition-with-lipid-nanodomains-produced-by-polymerization
#15
Yukihiro Okamoto, Yusuke Kishi, Keishi Suga, Hiroshi Umakoshi
We report the induction and control of chiral recognition in liposomal membranes by the photopolymerization of diacetylenic lipids (DiynePC). The specific properties of polymerized DiynePC liposomes were characterized, and then the chiral separation performance was estimated. As the polymerization proceeds, chiral recognition to ibuprofen was induced, and its efficiency increased due to the formation of rigid nanodomains and boundary edges. Furthermore, the chiral recognition and adsorbed amount could be controlled by the ratio of rigid nanodomains, varying the composition ratio of DiynePC...
March 14, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28255366/liposomal-nanoparticles-carrying-anti-il6r-antibody-to-the-tumour-microenvironment-inhibit-metastasis-in-two-molecular-subtypes-of-breast-cancer-mouse-models
#16
Chunlei Guo, Yanan Chen, Wenjuan Gao, Antao Chang, Yujie Ye, Wenzhi Shen, Yunping Luo, Shengyong Yang, Peiqing Sun, Rong Xiang, Na Li
Tumour microenvironment (TME) contributes significantly towards potentiating the stemness and metastasis properties of cancer cells. IL6-Stat3 is one of the important cell signaling pathways in mediating the communication between tumour and immune cells. Here, we have systematically developed a novel anti-CD44 antibody-mediated liposomal nanoparticle delivery system loaded with anti-IL6R antibody, which could specifically target the TME of CD44(+) breast cancer cells in different mouse models for triple negative and luminal breast cancer...
2017: Theranostics
https://www.readbyqxmd.com/read/28250648/the-influence-of-pluronic-f68-and-f127-nanocarrier-on-physicochemical-properties-in-vitro-release-and-antiproliferative-activity-of-thymoquinone-drug
#17
Salwa Shaarani, Shahrul Sahul Hamid, Noor Haida Mohd Kaus
BACKGROUND: This study reports on hydrophobic drug thymoquinone (TQ), an active compound found in the volatile oil of Nigella sativa that exhibits anticancer activities. Nanoformulation of this drug could potentially increase its bioavailability to specific target cells. OBJECTIVE: The aim of this study was to formulate TQ into polymer micelle, Pluronic F127 (5.0 wt %) and Pluronic F68 (0.1 wt %), as a drug carrier to enhance its solubility and instability in aqueous media...
January 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28244817/assembled-liposomes-of-dual-podophyllotoxin-phospholipid-preparation-characterization-and-in-vivo-anticancer-activity
#18
Longbing Ling, Chen Yao, Yawei Du, Muhammad Ismail, Ruiyu He, Yongpeng Hou, Ying Zhang, Xinsong Li
AIM: A novel amphiphilic prodrug dual podophyllotoxin (PPT) succinate glycerophosphorylcholine (Di-PPT-GPC) assembled liposomes was developed to improve efficiency of PPT. MATERIALS & METHODS: Di-PPT-GPC liposomes were prepared by thin film technique and characterized by dynamic light scattering and cryo-electron microscopy. RESULTS: In vitro release studies showed that Di-PPT-GPC liposomes could significantly release PPT in weakly acidic environment but had good stability under biological conditions...
March 2017: Nanomedicine
https://www.readbyqxmd.com/read/28242435/liposomal-delivery-of-ferrous-chlorophyllin-a-novel-third-generation-photosensitizer-for-in-vitro-pdt-of-melanoma
#19
Iman Gomaa, Aya Sebak, Nagia Afifi, Mahmoud Abdel-Kader
BACKGROUND: Cutaneous melanoma (CM) has substantially increased among Caucasian populations in the past few decades. This increased the number of CM deaths throughout the world. Pigmentation of melanoma reduces the efficacy of photodynamic therapy (PDT). Third generation photosensitizers (PSs) are characterized by improved targeting to the diseased tissue and reduced systemic side effects. This study is directed towards synthesis and characterization of liposomes encapsulating sodium ferrous chlorophyllin (Fe-CHL) and assessing its efficacy as a PS in PDT of melanoma...
February 24, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28238790/multifunctional-liposomes-interact-with-abeta-in-human-biological-fluids-therapeutic-implications-for-alzheimer-s-disease
#20
Elisa Conti, Maria Gregori, Isabella Radice, Fulvio Da Re, Denise Grana, Francesca Re, Elisa Salvati, Massimo Masserini, Carlo Ferrarese, Chiara Paola Zoia, Lucio Tremolizzo
The accumulation of extracellular amyloid beta (Abeta42) both in brain and in cerebral vessels characterizes Alzheimer's disease (AD) pathogenesis. Recently, the possibility to functionalize nanoparticles (NPs) surface with Abeta42 binding molecules, making them suitable tools for reducing Abeta42 burden has been shown effective in models of AD. Aim of this work consisted in proving that NPs might be effective in sequestering Abeta42 in biological fluids, such as CSF and plasma. This demonstration is extremely important considering that these Abeta42 pools are in continuum with the brain parenchyma with drainage of Abeta from interstitial brain tissue to blood vessel and plasma...
February 23, 2017: Neurochemistry International
keyword
keyword
111459
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"