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https://www.readbyqxmd.com/read/28532126/poly-%C3%AE-glutamic-acid-coated-lipoplexes-loaded-with-doxorubicin-for-enhancing-the-antitumor-activity-against-liver-tumors
#1
Na Qi, Bo Tang, Guang Liu, Xingsi Liang
The study was to develop poly-γ-glutamic acid (γ-PGA)-coated Doxorubicin (Dox) lipoplexes that enhance the antitumor activity against liver tumors. γ-PGA-coated lipoplexes were performed by electrostatistically attracting to the surface of cationic charge liposomes with anionic γ-PGA. With the increasing of γ-PGA concentration, the particle size of γ-PGA-coated Dox lipoplexes slightly increased, the zeta potential from positive shifted to negative, and the entrapment efficiency (EE) were no significant change...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28531175/weekly-high-dose-liposomal-amphotericin-b-l-amb-in-critically-ill-septic-patients-with-multiple-candida-colonization-the-ambidex-study
#2
Elie Azoulay, Jean-François Timsit, Alexandre Lautrette, Stephane Legriel, Adeline Max, Stephane Ruckly, Benoit Misset, Yves Cohen, Michel Wolff
BACKGROUND: To demonstrate the feasibility and safety of weekly high-dose liposomal amphotericin B (L-AmB) (as a pre-emptive antifungal treatment) for 2 weeks in patients with septic shock and Candida colonization. METHODS: Pilot, multicentre, open-label, prospective study conducted in seven French ICUs. Non-immunocompromised patients, receiving mechanical ventilation were eligible if they presented ICU-acquired severe sepsis requiring newly administered antibacterial agents and Candida colonization in at least two sites...
2017: PloS One
https://www.readbyqxmd.com/read/28530812/probing-the-binding-modes-of-a-multi-domain-protein-to-lipid-based-nanoparticles-by-relaxation-based-nmr
#3
Alberto Ceccon, Vitali Tugarinov, Andrew J Boughton, David Fushman, G Marius Clore
The interactions of two model multi-domain proteins - covalently linked di-ubiquitins, Ub2 - with lipid-based nanoparticles have been quantitatively probed by the measurements of NMR lifetime line broadening, ΔR2. By combined analysis of ΔR2 profiles arising from interactions with liposomes of varying sizes, an approach recently developed for the characterization of interactions of mono-ubiquitin with liposomes, we determine how the parameters of exchange (liposome binding) and dynamics of each individual domain of Ub2 on the surface of liposomes change when the domains are covalently attached to one another by a flexible linker...
May 22, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28530583/microencapsulation-structures-based-on-protein-coated-liposomes-obtained-through-electrospraying-for-the-stabilization-and-improved-bioaccessibility-of-curcumin
#4
Laura G Gómez-Mascaraque, Caroline Casagrande Sipoli, Lucimara Gaziola de La Torre, Amparo López-Rubio
Novel food-grade hybrid encapsulation structures based on the entrapment of phosphatidylcholine liposomes, within a WPC matrix through electrospraying, were developed and used as delivery vehicles for curcumin. The loading capacity and encapsulation efficiency of the proposed system was studied, and the suitability of the approach to stabilize curcumin and increase its bioaccessibility was assessed. Results showed that the maximum loading capacity of the liposomes was around 1.5% of curcumin, although the loading capacity of the hybrid microencapsulation structures increased with the curcumin content by incorporation of curcumin microcrystals upon electrospraying...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28530145/bioengineered-liposome-scaffold-composites-as-therapeutic-delivery-systems
#5
Claudia Zylberberg, Sandro Matosevic
The therapeutic potential of liposomes can be amplified when combined with biomaterial scaffolds. Such configurations overcome the convergent demands of therapies by enabling enhanced delivery, environmental responsiveness and potency. Liposomes benefit from the increased physical and mechanical strength, favorable rheological properties and natural environment conducive to improved tissue formation that scaffolds provide, while enabling biocompatible delivery of hydrophilic and lipophilic compounds that can be further functionalized to achieve targeted delivery...
June 2017: Therapeutic Delivery
https://www.readbyqxmd.com/read/28530056/-cutaneous-leishmaniasis-in-israel-2016-an-update
#6
REVIEW
Michal Solomon, Eli Schwartz
Leishmaniasis is endemic in Israel and is increasing in its frequency. The pathogens that cause cutaneous leishmaniasis (CL) in Israel are Leishmania major (L. major) and Leishmania tropica (L. tropica). In recent years, there have been significant changes in the distribution of these species. L. major is endemic mainly in the Negev, Arava and the Beit She'an Valley. L. tropica is endemic in Tiberias, northern Sea of Galilee, Samaria and in the vicinity of Jerusalem such as at Kfar Adumim, Ma'ale Adumim and Anathoth (north-east of Jerusalem)...
October 2016: Harefuah
https://www.readbyqxmd.com/read/28529672/on-chip-density-based-purification-of-liposomes
#7
Siddharth Deshpande, Anthony Birnie, Cees Dekker
Due to their cell membrane-mimicking properties, liposomes have served as a versatile research tool in science, from membrane biophysics and drug delivery systems to bottom-up synthetic cells. We recently reported a novel microfluidic method, Octanol-assisted Liposome Assembly (OLA), to form cell-sized, monodisperse, unilamellar liposomes with excellent encapsulation efficiency. Although OLA provides crucial advantages over alternative methods, it suffers from the presence of 1-octanol droplets, an inevitable by-product of the production process...
May 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/28529640/lung-cancer-targeting-peptides-with-multi-subtype-indication-for-combinational-drug-delivery-and-molecular-imaging
#8
Yi-Hsuan Chi, Jong-Kai Hsiao, Ming-Huang Lin, Chen Chang, Chun-Hsin Lan, Han-Chung Wu
Lung cancer is the leading cause of cancer-related death worldwide. Most targeted drugs approved for lung cancer treatment are tyrosine kinase inhibitors (TKIs) directed against EGFR or ALK, and are used mainly for adenocarcinoma. At present, there is no effective or tailored targeting agent for large cell carcinoma (LCC) or small cell lung cancer (SCLC). Therefore, we aimed to identify targeting peptides with diagnostic and therapeutic utility that possess broad subtype specificity for SCLC and non-small cell lung cancer (NSCLC)...
2017: Theranostics
https://www.readbyqxmd.com/read/28528299/selective-targeting-and-therapy-of-metastatic-and-multidrug-resistant-tumors-using-a-long-circulating-podophyllotoxin-nanoparticle
#9
Aniruddha Roy, Yucheng Zhao, Yang Yang, Andras Szeitz, Tara Klassen, Shyh-Dar Li
Treatment options for metastatic and multidrug resistant (MDR) tumors are limited, and most of the chemotherapeutic drugs exhibit low efficacy against MDR cancers. An anti-tubulin agent podophyllotoxin (PPT) displays high potency against MDR tumor cells. However, due to its poor solubility and non-specificity, PPT cannot be used systemically. We have developed a self-assembling nanoparticle dosage form for PPT (named Celludo) by covalently conjugating PPT and polyethylene glycol (PEG) to acetylated carboxymethyl cellulose (CMC-Ac) via ester linkages...
May 11, 2017: Biomaterials
https://www.readbyqxmd.com/read/28528212/targeted-co-delivery-of-polypyrrole-and-rapamycin-by-trastuzumab-conjugated-liposomes-for-combined-chemo-photothermal-therapy
#10
Hanh Thuy Nguyen, Tuan Hiep Tran, Raj Kumar Thapa, Cao Dai Phung, Beom Soo Shin, Jee-Heon Jeong, Han-Gon Choi, Chul Soon Yong, Jong Oh Kim
Trastuzumab is a therapeutic monoclonal antibody that selectively recognizes HER2/neu receptor for targeting breast cancers. In this study, we aimed to present a strategy to combine chemo and phototherapy and targeted delivery via monoclonal antibody for enhanced anticancer effects. We co-loaded a chemotherapeutic agent, rapamycin, and a photosensitizer, polypyrrole, in trastuzumab-conjugated liposomes (LRPmAb) for combined chemo-photothermal therapy. LRPmAb had small size (172.2±9.6nm), narrow distribution, and negative ζ-potential (-12...
May 17, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28528112/microencapsulation-and-characterization-of-liposomal-vesicles-using-a-supercritical-fluid-process-coupled-with-vacuum-driven-cargo-loading
#11
Wen-Chyan Tsai, Syed S H Rizvi
A new technique of liposomal microencapsulation, consisting of supercritical fluid extraction followed by rapid expansion of the supercritical solution and vacuum-driven cargo loading, was successfully developed. It is a continuous flow-through process without usage of any toxic organic solvent. For use as a coating material, the solubility of soy phospholipids in supercritical carbon dioxide was first determined using a dynamic equilibrium system and the data was correlated with the Chrastil model with good agreement...
June 2017: Food Research International
https://www.readbyqxmd.com/read/28527429/coexistence-of-light-driven-na-and-h-transport-in-a-microbial-rhodopsin-from-nonlabens-dokdonensis
#12
Hongshen Zhao, Baofu Ma, Liangliang Ji, Longjie Li, Huanhuan Wang, Deliang Chen
Ion pumping microbial rhodopsins are photochemically active membrane proteins, converting light energy into ion-motive-force for ATP synthesis. Nonlabens dokdonensis rhodopsin 2 (NdR2), was recently identified as a light-driven Na(+) pump. However, few functional studies on NdR2 have been conducted to elucidate its mechanism of ion transport. By reconstituting NdR2 into liposomes, we proved that NdR2 functions as a light-driven Na(+)/H(+) pump. As Na(+) concentration increased, the dominant H(+) pump activity switched to the Na(+) pump activity at neutral pH...
May 10, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28527360/liposomes-coated-with-hydrophobically-modified-hydroxyethyl-cellulose-influence-of-hydrophobic-chain-length-and-degree-of-modification
#13
Gro Smistad, Bo Nyström, Kaizheng Zhu, Marthe Karoline Grønvold, Anne Røv-Johnsen, Marianne Hiorth
Nanoparticulate systems with an uncharged hydrophilic surface may have a great potential in mucosal drug delivery. In the present study liposomes were coated with hydrophobically modified hydroxyethyl cellulose (HM-HEC) to create a sterically stabilized liposomal system with an uncharged surface. The aim was to clarify the influence of the amount of hydrophobic modification of HEC and the length of the hydrophobic moiety, on the stability of the system and on the release properties. HM-HEC with different degrees of hydrophobic modification (1 and 2mol%) and hydrophobic groups with different chain lengths (C8, C12, C16) were included in the study, as well as fluid phase and gel phase liposomes...
May 1, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28527169/isolated-renal-mucormycosis
#14
R Sriranga, Satyajeet Pawar, Wasim Khot, Neeraj Nischal, Manish Soneja, H A Venkatesh, Ragesh R Nair, Raj Kanna, Mehar C Sharma, S K Sharma
Mucormycosis in humans has been described as early as 1885 in literature. Isolated renal mucormycosis is rare as it has been mainly described in developing countries like India and China. It is rarer still to find this entity in immunocompetent young males without any risk factors. Specific guidelines on the treatment is not yet known but combined surgical and medical therapy is considered the best modality for its management. We describe a young male who presented with bilateral hydroureteronephrosis. He was initially treated as a case renal tuberculosis which is relatively more common in TB endemic country like ours...
April 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/28526602/palmitoyl-ascorbate-and-doxorubicin-co-encapsulated-liposome-for-synergistic-anticancer-therapy
#15
Yue Yang, Xiaoyu Lu, Qi Liu, Yu Dai, Xiaojie Zhu, Yanli Wen, Jiaqiu Xu, Yang Lu, Di Zhao, Xijing Chen, Ning Li
Combination therapy with two drugs and nanoparticle-based drug delivery systems are widely applied to reduce the adverse effects of traditional treatment by chemotherapeutic drugs. Palmitoyl ascorbate (PA) as a lipophilic derivative of ascorbic acid shows the advantages in cancer treatment. The aim of the study was to prepare a doxorubicin (DOX) and PA co-loaded liposome to synergistically treat tumor and effectively alleviate the toxicity caused by DOX. The effects were evaluated by in vitro and in vivo studies...
May 16, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28525950/hydrophobic-drug-loaded-pegylated-magnetic-liposomes-for-drug-controlled-release
#16
Andri Hardiansyah, Ming-Chien Yang, Ting-Yu Liu, Chih-Yu Kuo, Li-Ying Huang, Tzu-Yi Chan
Less targeted and limited solubility of hydrophobic-based drug are one of the serious obstacles in drug delivery system. Thus, new strategies to enhance the solubility of hydrophobic drug and controlled release behaviors would be developed. Herein, curcumin, a model of hydrophobic drug, has been loaded into PEGylated magnetic liposomes as a drug carrier platform for drug controlled release system. Inductive magnetic heating (hyperthermia)-stimulated drug release, in vitro cellular cytotoxicity assay of curcumin-loaded PEGylated magnetic liposomes and cellular internalization-induced by magnetic guidance would be investigated...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28525367/liposomal-co-delivered-oleanolic-acid-attenuates-doxorubicin-induced-multi-organ-toxicity-in-hepatocellular-carcinoma
#17
Muhammad Sarfraz, Attia Afzal, Shahid Masood Raza, Sajid Bashir, Asadullah Madni, Muhammad Waseem Khan, Xiang Ma, Guangya Xiang
Doxorubicin in combination with other cytotoxic drugs has clinical advantages. However, doxorubicin-induced cardiotoxicity negatively impacts clinical utility and outcomes. Cardiotoxicity can result from increased oxidative stress or from a local cytochrome P450 mediated increase in 20-hydroxy-5, 8, 11, 14-eicosatetraenoic acid (20-HETE). Oleanolic acid (OA) is a natural pentacyclic triterpenoid with free radical scavenging, cardioprotective, and P450-mediated cyclooxygenase-upregulating properties. We investigated co-delivery of liposomal OA and doxorubicin in a HepG2 model of hepatocellular carcinoma (HCC)...
May 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28524721/thermoresponsive-pegylated-bubble-liposome-nanovectors-for-efficient-sirna-delivery-via-endosomal-escape
#18
Kholod Alamoudi, Patricia Martins, Jonas G Croissant, Sachin Patil, Haneen Omar, Niveen M Khashab
AIM: Improving the delivery of siRNA into cancer cells via bubble liposomes. Designing a thermoresponsive pegylated liposome through the introduction of ammonium bicarbonate salt into liposomes so as to control their endosomal escape for gene therapy. METHODS: A sub-200 nm nanovector was fully characterized and examined for cellular uptake, cytotoxicity, endosomal escape and gene silencing. RESULTS: The siRNA-liposomes were internalized into cancer cells within 5 min and then released siRNAs in the cytosol prior to lysosomal degradation upon external temperature elevation...
May 19, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28524259/nonpegylated-liposomal-doxorubicin-combination-regimen-in-patients-with-diffuse-large-b-cell-lymphoma-and-cardiac-comorbidity-results-of-the-heart01-phase-ii-trial-conducted-by-the-fondazione-italiana-linfomi
#19
Stefano Luminari, Elda Viel, Andrés José Maria Ferreri, Francesco Zaja, Emanuela Chimienti, Gerardo Musuraca, Alessandra Tucci, Monica Balzarotti, Monica Tani, Francesca Salvi, Emanuela A Pesce, Angela Ferrari, Anna M Liberati, Antonio Spadea, Dario Marino, Maria Bruno-Ventre, Stefano Volpetti, Chiara Bottelli, Elena Ravaioli, Francesco Merli, Michele Spina
The purpose of this phase 2, multicenter study was to determine the activity and safety of nonpegylated liposomal doxorubicin as part of "R-COMP" combination in patients with diffuse large B-cell lymphoma and coexisting cardiac disorders. The study was conducted using a Bayesian continuing assessment method using complete remission rate and rate of cardiac events as study endpoints. Between November 2009 and October 2011, 50 evaluable patients were enrolled (median age, 76 years). Median baseline left ventricular ejection fraction (LVEF) was 60%...
May 19, 2017: Hematological Oncology
https://www.readbyqxmd.com/read/28524182/cell-sized-mechanosensitive-and-biosensing-compartment-programmed-with-dna
#20
Sagardip Majumder, Jonathan Garamella, Ying-Lin Wang, Maxwell DeNies, Vincent Noireaux, Allen P Liu
The bottom-up construction of cell-sized compartments programmed with DNA that are capable of sensing the chemical and physical environment remains challenging in synthetic cell engineering. Here, we construct mechanosensitive liposomes with biosensing capability by expressing the E. coli channel MscL and a calcium biosensor using cell-free expression.
May 19, 2017: Chemical Communications: Chem Comm
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