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https://www.readbyqxmd.com/read/29334266/hyaluronic-acid-modified-daunorubicin-plus-honokiol-cationic-liposomes-for-the-treatment-of-breast-cancer-along-with-the-elimination-vasculogenic-mimicry-channels
#1
Rui-Jun Ju, Lan Cheng, Xiao Qiu, Shuang Liu, Xiao-Li Song, Xiao-Ming Peng, Teng Wang, Cui-Qing Li, Xue-Tao Li
BACKGROUND: Breast cancer is an alarming global public health problem and a main cause of cancer-related death in women. Systemic chemotherapy is the most widely used treatment for breast cancer. However, current chemotherapy treatments are far from desirable due to poor targeting specificity, severe side effects, and vasculogenic mimicry (VM). PURPOSE: Hyaluronic acid (HA) modified daunorubicin plus honokiol cationic liposomes were prepared and characterized for treatment of breast cancer by eliminating VM...
January 15, 2018: Journal of Drug Targeting
https://www.readbyqxmd.com/read/29333674/microrna-detection-by-dna-mediated-liposome-fusion
#2
Coline Jumeaux, Olov Wahlsten, Stephan Block, Eunjung Kim, Rona Chandrawati, Philip D Howes, Fredrik Höök, Molly M Stevens
Membrane fusion is a process of fundamental importance in biological systems that involves highly selective recognition mechanisms for the trafficking of molecular and ionic cargos. Mimicking natural membrane fusion mechanisms for the purpose of biosensor development holds great potential for amplified detection because relatively few highly discriminating targets lead to fusion and an accompanied engagement of a large payload of signal-generating molecules. In this work, sequence-specific DNA-mediated liposome fusion is used for the highly selective detection of microRNA...
December 7, 2017: Chembiochem: a European Journal of Chemical Biology
https://www.readbyqxmd.com/read/29332569/cancer-treatment-with-liposomes-based-drugs-and-genes-co-delivery-systems
#3
Chuanmin Zhang, Shubiao Zhang, Defu Zhi, Jingnan Cui
There are several mechanisms by which cancer cells form resistance to treatments, including increasing anti-apoptosis, increasing drug efflux, inducing angiogenesis, enhancing DNA repair and altering cell cycle checkpoints, etc. The drugs are hard to reach the curative effects due to these resistance mechanisms. It has been suggested that liposomes based co-delivery systems, which can deliver drugs and genes to the same tumor cells and exhibit synergistic anti-cancer effects, could be used to overcome the resistance of cancer cells...
January 10, 2018: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29331413/eef-2-kinase-targeted-mir-449b-confers-radiation-sensitivity-to-cancer-cells
#4
Cheng Ji, QiongHua Xu, LingChuan Guo, XiaoHui Wang, YiJie Ren, HongHan Zhang, WeiDong Zhu, ZhiJun Ming, YunSheng Yuan, XingCong Ren, JianXun Song, Yan Cheng, JinMing Yang, Yi Zhang
The roles of microRNA in regulation of various biological processes and in modulation of therapeutic effects have been widely appreciated. In this study, we found a positive correlation between miR-449 b expression and radiation sensitivity in cancer cells and in tumor specimens from patients. We showed that eEF-2 kinase, a negative regulator of global protein synthesis, is a target of miR-449 b. Introducing a miR-449 b mimic into cancer cells led to suppression of eEF-2 kinase expression, leading to increases of protein synthesis and depletion of cellular ATP...
January 10, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29330050/production-and-characterization-of-a-novel-site-specific-modifiable-anti-ox40-receptor-single-chain-variable-fragment-for-targeted-drug-delivery
#5
Aki Tanabe, Kazumi Nakano, Makoto Nakakido, Satoru Nagatoishi, Yuetsu Tanaka, Kouhei Tsumoto, Kaoru Uchimaru, Toshiki Watanabe
OX40 receptor (tumor necrosis factor receptor superfamily, member 4; CD134) is a T-cell co-stimulatory molecule that plays an important role in T-cell activation and survival. OX40 receptor is activated by its ligand, OX40L; and modulation of the OX40-OX40L interaction is a promising target for the treatment of autoimmune diseases and cancers. Here, we generated a high-affinity anti-OX40 single-chain variable fragment carrying a C-terminal cysteine residue (scFvC). Physicochemical and functional analyses revealed that the scFvC bound to OX40-expressing cells and was internalized via OX40-mediated endocytosis without inducing phosphorylation of IκBα (nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor, alpha), an important complex in the classical NFκB (nuclear factor kappa-light-chain-enhancer of activated B cells) signaling pathway...
January 9, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29329619/hepatic-fibropoiesis-in-dogs-naturally-infected-with-leishmania-leishmania-infantum-treated-with-liposome-encapsulated-meglumine-antimoniate-and-allopurinol
#6
R S Castro, I F G de Amorim, R A Pereira, S M Silva, L J Pinheiro, A J W Pinto, E G Azevedo, C Demicheli, M M V Caliari, D M Mosser, M S M Michalick, Frédéric J G Frezard, Wagner L Tafuri
Hepatic fibropoiesis in canine visceral leishmaniasis (CVL) were evaluated by histological (morphometrical collagen deposition) and immunohistochemical assays characterizing alpha-actin (α-SMA), vimentin, calprotectin (L1 antigen), and TGF-β in 46 naturally infected dogs with Leishmania infantum treated with liposome-encapsulated meglumine antimoniate and allopurinol separately and in combination. Six treatment groups were defined: meglumine antimoniate encapsulated in nanometric liposomes (LMA), allopurinol (ALLOP); liposome-encapsulated meglumine antomoniate combined with allopurinol (LMA+ALLOP); empty liposomes (LEMP); empty liposomes combined with allopurinol (LEMP+ALLOP) and saline...
January 30, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29329027/cytotoxic-and-anticancer-properties-of-new-ruthenium-polypyridyl-complexes-with-different-lipophilicities
#7
Anjong Florence Tikum, Yu Jeong Jeon, Ju Hyun Lee, Min Hee Park, In Yeong Bae, Sang Heon Kim, Hye Jin Lee, Jinheung Kim
Three ruthenium complexes containing a bidentate piq ligand, [(piq)Ru(bpy)2]2+ (1), [(piq)Ru(phen)2]2+ (2), and [(piq)Ru(DIP)2]2+ (3) (piq = phenylisoquinolinate, bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline, DIP = 4,7-diphenyl-1,10-phenanthroline), were prepared. The DNA binding properties of complexes 1-3 to double-stranded DNA were studied. The binding of 1-3 to calf-thymus DNA (ct-DNA) yielded lower emission intensities than those observed with the corresponding Ru complexes alone. To explore potential interactions of complexes 1-3 with lipid-rich organs in live cells, the emission properties of the Ru probes were studied with liposomes...
January 9, 2018: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29328378/liposome%C3%A2-delivered-baicalein-induction-of-myeloid-leukemia-k562-cell-death-via-reactive-oxygen-species-generation
#8
Scarlet Xiaoyan Wang, Xuesong Wen, Celia Bell, Sandra Appiah
Baicalein (BL), a potential cancer chemopreventative flavone, has been reported to inhibit cancer cell growth by inducing apoptosis and causing cell cycle arrest in various human cancer cell models. Delivery of BL via nanoliposomes has been shown to improve its oral bioavailability and long‑circulating property in vivo. However, the role of BL in the inhibition of human chronic myeloid leukemia (CML) K562 cell growth and its underlying mechanisms has yet to be elucidated. In the present study, BL was formulated into liposomes with different sizes to improve its solubility and stability...
January 8, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29326081/macromolecule-nanotherapeutics-approaches-and-challenges
#9
REVIEW
Puneet Tyagi, Jose Luis Santos
With the advent of technology, newer forms of drugs, such as proteins, DNA, and RNA, have entered mainstream product development. However, systemic delivery of macromolecules is limited by rapid blood clearance, poor stability in vivo, and inadequate uptake by cells. Nanoparticle (NP)-based delivery systems have emerged as suitable carriers for overcoming such pharmacokinetic limitations of macromolecule delivery. Nanocarriers, such as liposomes, provide protection for sensitive drug materials and also enhance the circulation half-life of=therapeutics...
January 8, 2018: Drug Discovery Today
https://www.readbyqxmd.com/read/29325469/current-update-of-a-thermosensitive-liposomes-composed-of-dppc-and-brij78
#10
Laurence Ho, Mehrdad Bokharaei, Shyh-Dar Li
Thermosensitive liposomes (TSLs) have been a prominent area of study in the discipline of tumor-targeted chemotherapeutics. The representative product of TSLs is ThermoDox® (DPPC/lyso-PC/PEG-lipid), which has advanced to Phase III clinical trials. Various groups have sought to develop a new TSL to improve upon the LTSL (lyso-lipid temperature sensitive liposomes) formulation that is used to prepare ThermoDOX®. This review focuses on the development and recent update of an innovative TSL formulation, HaT-liposomes composed of DPPC and Brij78...
January 11, 2018: Journal of Drug Targeting
https://www.readbyqxmd.com/read/29325247/-impact-of-prdm1-gene-inactivation-on-c-myc-regulation-in-diffuse-large-b-cell-lymphoma
#11
X Y Zhang, Z P Ma, W L Cui, X L Pang, R Chen, L Wang, W Zhang, X X Li
Objective: To investigate the role of PRDM1 gene inactivaion in the regulation of C-MYC in diffuse large B-cell lymphoma (DLBCL), and to explore the correlation of its immunophenotype and prognosis. Methods: 100 cases paraffin-embedded DLBCL tissues were collected from January 2009 to December 2015 at the First Affiliated Hospital of Xinjiang Medical University along with 20 cases of reactive proliferative lymph nodes as control. Immunohistochemical methods were used to detect the expression of CD20, CD10, MUM1, Ki-67, bcl-6, PRDM1/Blimp1, C-MYC and PAX5 protein...
January 8, 2018: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/29323910/direct-synthesis-of-prussian-blue-nanoparticles-in-liposomes-incorporating-natural-ion-channels-for-cs-adsorption-and-particle-size-control
#12
Tomomi Koshiyama, Motoki Tanaka, Masayuki Honjo, Yumi Fukunaga, Tomoya Okamura, Masaaki Ohba
Coordination polymer (CP) nanoparticles (NPs) formed by a self-assembly of organic ligands and metal ions are one of the attractive materials for molecular capture and deliver/release in aqueous media. Control of particle size and prevention of aggregation among CP NPs are important factors for improving their adsorption capability in water. We demonstrate here the potential of a liposome incorporating an antibiotic ion channel as a vessel for synthesizing Prussian blue (PB) NPs, being a typical CP. In the formation of PB NPs within liposomes, the influx rate of Fe2+ ions into liposome encapsulated [Fe(CN)6]3- through channels was fundamental for the change of NPs' sizes...
January 11, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29323763/calcium-responsive-liposomes-via-a-synthetic-lipid-switch
#13
Jinchao Lou, Adam Carr, Alexa Watson, Samuel Mattern-Schain, Michael D Best
Liposomal drug delivery would benefit from enhanced control over content release. Here, we report a novel avenue for triggering release driven by chemical composition using liposomes sensitized to calcium, a target chosen due to its key roles in biology and disease. To demonstrate this principle, we synthesized calcium responsive lipid switch 1, designed to undergo conformational changes upon calcium binding that perturb membrane integrity, thereby promoting release. This was shown through fluorescence-based release assays via dose-dependent response depending on the percentage of 1 in liposomes, with minimal background leakage in controls...
January 11, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29323183/delivery-of-xenon-containing-echogenic-liposomes-inhibits-early-brain-injury-following-subarachnoid-hemorrhage
#14
Yi-Feng Miao, Tao Peng, Melanie R Moody, Melvin E Klegerman, Jaroslaw Aronowski, James Grotta, David D McPherson, Hyunggun Kim, Shao-Ling Huang
Xenon (Xe), a noble gas, has promising neuroprotective properties with no proven adverse side-effects. We evaluated neuroprotective effects of Xe delivered by Xe-containing echogenic liposomes (Xe-ELIP) via ultrasound-controlled cerebral drug release on early brain injury following subarachnoid hemorrhage (SAH). The Xe-ELIP structure was evaluated by ultrasound imaging, electron microscopy and gas chromatography-mass spectroscopy. Animals were randomly divided into five groups: Sham, SAH, SAH treated with Xe-ELIP, empty ELIP, or Xe-saturated saline...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29321261/a-model-free-method-for-measuring-dimerization-free-energies-of-clc-ec1-in-lipid-bilayers
#15
Rahul Chadda, Lucy Cliff, Marley Brimberry, Janice L Robertson
The thermodynamic reasons why membrane proteins form stable complexes inside the hydrophobic lipid bilayer remain poorly understood. This is largely because of a lack of membrane-protein systems amenable for equilibrium studies and a limited number of methods for measuring these reactions. Recently, we reported the equilibrium dimerization of the CLC-ec1 Cl-/H+ transporter in lipid bilayers (Chadda et al. 2016. eLife https://doi.org/10.7554/eLife.17438), which provided a new type of model system for studying protein association in membranes...
January 10, 2018: Journal of General Physiology
https://www.readbyqxmd.com/read/29320699/lret-determination-of-molecular-distances-during-ph-gating-of-the-mammalian-inward-rectifier-kir1-1b
#16
Mikheil Nanazashvili, Jorge E Sánchez-Rodríguez, Ben Fosque, Francisco Bezanilla, Henry Sackin
Gating of the mammalian inward rectifier Kir1.1 at the helix bundle crossing (HBC) by intracellular pH is believed to be mediated by conformational changes in the C-terminal domain (CTD). However, the exact motion of the CTD during Kir gating remains controversial. Crystal structures and single-molecule fluorescence resonance energy transfer of KirBac channels have implied a rigid body rotation and/or a contraction of the CTD as possible triggers for opening of the HBC gate. In our study, we used lanthanide-based resonance energy transfer on single-Cys dimeric constructs of the mammalian renal inward rectifier, Kir1...
January 9, 2018: Biophysical Journal
https://www.readbyqxmd.com/read/29320427/peptide-mediated-liposome-fusion-the-effect-of-anchor-positioning
#17
Niek S A Crone, Dirk Minnee, Alexander Kros, Aimee L Boyle
A minimal model system for membrane fusion, comprising two complementary peptides dubbed "E" and "K" joined to a cholesterol anchor via a polyethyleneglycol spacer, has previously been developed in our group. This system promotes the fusion of large unilamellar vesicles and facilitates liposome-cell fusion both in vitro and in vivo. Whilst several aspects of the system have previously been investigated to provide an insight as to how fusion is facilitated, anchor positioning has not yet been considered. In this study, the effects of placing the anchor at either the N-terminus or in the center of the peptide are investigated using a combination of circular dichroism spectroscopy, dynamic light scattering, and fluorescence assays...
January 10, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29319040/refractory-bronchovascular-pleuropulmonary-mucormycosis-case-report-and-difficulties-in-management
#18
M Manjunath, Deepak Prajapat, Rahul Kumar Sharma, Deepak Talwar
Pulmonary mucormycosis is a life-threatening opportunistic fungal infection. It is considered as a disease of immunocompromised state and is rarely seen in immunocompetent patients. We here report a case of refractory bronchovascular pleuropulmonary mucormycosis, who despite early detection, optimal management with liposomal amphotericin B, and posaconazole therapy followed by surgery, progressed further and led to a fatal outcome. Dual antifungal therapy combined with surgery is the only definitive treatment option available in the literature...
January 2018: Lung India: Official Organ of Indian Chest Society
https://www.readbyqxmd.com/read/29318970/physicochemical-characterization-and-skin-permeation-of-cationic-transfersomes-containing-the-synthetic-peptide-pnpp-19
#19
Flavia De Marco Almeida, Carolina Nunes Silva, Savia Caldeira de Araujo Lopes, Daniel Moreira Santos, Fernanda Silva Torres, Felipe Lima Cardoso, Patricia Massara Martinelli, Elizabeth Ribeiro da Silva, Maria Elena de Lima, Lucas Antonio Ferreira Miranda, Monica Cristina Oliveira
BACKGROUND: PnPP-19 is a 19-amino-acid synthetic peptide previously described as a novel drug for the treatment of erectile dysfunction. OBJECTIVE: The aim of this work was to evaluate the physicochemical properties of cationic transfersomes containing PnPP-19 and the skin permeation of free PnPP-19 and PnPP-19-loaded transfersomes. METHOD: Three different liposomal preparation methods were evaluated. Cationic transfersomes contained egg phosphatidyl choline: stearylamine (9:1 w/w) and Tween 20 (84...
January 8, 2018: Current Drug Delivery
https://www.readbyqxmd.com/read/29317816/lipopolysaccharide-induced-inflammation-in-monocytes-macrophages-is-blocked-by-liposomal-delivery-of-gi-protein-inhibitor
#20
Monica Madalina Tucureanu, Daniela Rebleanu, Cristina Ana Constantinescu, Mariana Deleanu, Geanina Voicu, Elena Butoi, Manuela Calin, Ileana Manduteanu
Background: Lipopolysaccharide (LPS) is widely recognized as a potent activator of monocytes/macrophages, and its effects include an altered production of key mediators, such as inflammatory cytokines and chemokines. The involvement of Gi protein in mediating LPS effects has been demonstrated in murine macrophages and various cell types of human origin. Purpose: The aim of the present work was to evaluate the potential of a Gi-protein inhibitor encapsulated in liposomes in reducing the inflammatory effects induced by LPS in monocytes/macrophages...
2018: International Journal of Nanomedicine
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