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https://www.readbyqxmd.com/read/28454226/long-non-coding-rna-hotair-enhances-radioresistance-in-mda-mb231-breast-cancer-cells
#1
Yun Zhou, Chaoqun Wang, Xia Liu, Chengjun Wu, Haitao Yin
The aim of the present study was to investigate the radiosensitizing effects of homeobox (HOX) transcript antisense RNA (HOTAIR) long non-coding RNA on breast cancer tumor cells and examine the underlying mechanisms. Recombinant plasmid vectors containing HOTAIR gene were constructed and MDA-MB231 cells were transfected with these plasmids using liposomes. The cells were treated with radiation and cell apoptosis, proliferation, and double-stranded DNA breaks were examined. HOXD10, phosphorylated AKT (p-AKT) and p-BAD expression levels were measured using western blot analysis...
March 2017: Oncology Letters
https://www.readbyqxmd.com/read/28454064/withaferin-a-a-steroidal-lactone-encapsulated-mannose-decorated-liposomes-ameliorates-rheumatoid-arthritis-by-intriguing-the-macrophage-repolarization-in-adjuvant-induced-arthritic-rats
#2
Farhath Sultana, Manoj Kumar Neog, MahaboobKhan Rasool
In order to develop a better therapeutic approach for the treatment of rheumatoid arthritis (RA), withaferin-A; a steroidal lactone incorporated with mannosylated liposomes (ML-WA) was administered to adjuvant induced arthritic rats in intent to target the synovial macrophages. The confocal microscopy studies showed a successful internalization of ML-WA in the primarily isolated synovial macrophages. Consequently, targeting synovial macrophages via ML-WA reduced the oxidative stress (ROS and NO), and paw edema, however, a progressive gain in the body weight was observed in AIA rats...
April 23, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28453702/a-phase-2-randomized-double-blind-placebo-%C3%A2-controlled-study-of-chemo-immunotherapy-combination-using-motolimod-with-pegylated-liposomal-doxorubicin-in-recurrent-or-persistent-ovarian-cancer-a-gynecologic-oncology-group-partners-study
#3
B J Monk, M F Brady, C Aghajanian, H A Lankes, T Rizack, J Leach, J M Fowler, R Higgins, P Hanjani, M Morgan, R Edwards, W Bradley, T Kolevska, P Foukas, E M Swisher, K S Anderson, R Gottardo, J K Bryan, M Newkirk, K L Manjarrez, R S Mannel, R M Hershberg, G Coukos
Background: A phase 2, randomized, placebo-controlled trial was conducted in women with recurrent epithelial ovarian carcinoma to evaluate the efficacy and safety of motolimod-a Toll-like receptor 8 (TLR8) agonist that stimulates robust innate immune responses-combined with pegylated liposomal doxorubicin (PLD), a chemotherapeutic that induces immunogenic cell death. Patients and methods: Women with ovarian, fallopian tube, or primary peritoneal carcinoma were randomized 1 : 1 to receive PLD in combination with blinded motolimod or placebo...
May 1, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/28448961/supported-binary-liposome-vesicle-gold-nanoparticle-for-enhanced-label-free-dna-and-protein-sensing
#4
Divya Karutha Pandian, Venkataraman Dharuman
Supported binary liposome mixture of cationic liposome N-[1-(2,3-Dioleoyloxy)propyl]-N,N,N-trimethylammonium propane (DOTAP) and the zwitterionic liposome 1,2-Dioleoyl-sn-Glycero-3-Phosphoethanolamine (DOPE) were tethered on thiol monolayers in the absence and presence of gold nanoparticle to enhance sensor stability and sensitivity for label free DNA and protein sensing for the first time. Cysteamine hydrochloride (Cyst), 3-Mercaptopropionic acid (MPA), 11-Mercaptoundecanoic acid (MUDA) and 11-amino-1-undecane thiol (AUT) monolayers were used as tethers on gold surfaces...
April 20, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28447920/prolonged-circulation-and-increased-tumor-accumulation-of-liposomal-vincristine-in-a-mouse-model-of-rhabdomyosarcoma
#5
Maurizio Roveri, Alice Pfohl, Patricia Jaaks, Nagjie Alijaj, Jean-Christophe Leroux, Paola Luciani, Michele Bernasconi
AIM: Our goal was to improve vincristine (VCR) based rhabdomyosarcoma (RMS) therapy by encapsulating the drug into liposomes. A targeting strategy was attempted to enhance tumor accumulation. MATERIALS & METHODS: VCR was loaded in control and peptide-decorated liposomes via an active method. The interaction of an RMS-specific peptide with the presumed target furin and the cellular uptake of both liposomal groups were studied in vitro. Pharmacokinetics and biodistribution of VCR-containing liposomes were assessed in an RMS xenograft mouse model...
April 27, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28447868/doxorubicin-loaded-liposomes-enhancing-the-oral-bioavailability-by-modulation-of-physicochemical-characteristics
#6
Marjan Daeihamed, Azadeh Haeri, Seyed Nasser Ostad, Masoud Faghih Akhlaghi, Simin Dadashzadeh
AIM: In this study, the effects of liposome characteristics on oral absorption of doxorubicin, as a hydrophilic low-permeability drug, were investigated. MATERIALS & METHODS: Different doxorubicin-loaded liposomes were prepared, characterized and orally administered to 18 groups of rats. Plasma concentrations of doxorubicin and its aglycone metabolite were measured, and Caco-2 uptake and transport of optimum liposomes were investigated. RESULTS: After studying different factors, a fourfold increase in oral bioavailability was achieved with the non-PEGylated, 120-nm-sized positively charged rigid liposomes (lipid to drug ratio = 10)...
April 27, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28447549/a-child-with-severe-iron-deficiency-anemia-and-a-complex-tmprss6-genotype
#7
Anna Paola Capra, Elisa Ferro, Laura Cannavò, Maria Angela La Rosa, Giuseppina Zirilli
OBJECTIVES: We report a case of a 7-year-old girl with severe hypochromic microcytic anemia, who was unresponsive to classical iron supplements. We suspected IRIDA, iron-refractory iron-deficiency anemia, a genetic iron metabolism disorder, caused by TMPRSS6 variations. TMPRSS6 encodes matriptase-2, a negative regulator of hepcidin, and its pathological variants are related to normal to high levels of hepcidin. We analyzed the TMPRSS6 gene and we improved clinical management of the patient, selecting the appropriate supplementation therapy...
April 27, 2017: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/28446674/broadening-cd4-and-cd8-t-cell-responses-against-hepatitis-c-virus-by-vaccination-with-ns3-overlapping-peptide-panels-in-cross-priming-liposomes
#8
Jonathan Filskov, Marianne Mikkelsen, Paul R Hansen, Jan P Christensen, Allan R Thomsen, Peter Andersen, Jens Bukh, Else Marie Agger
Despite the introduction of effective drugs to treat patients with chronic hepatitis C virus (HCV) infection, a vaccine would be the only means to substantially reduce the worldwide disease burden. An incomplete understanding of how HCV interacts with its human host and evades immune surveillance has hampered vaccine development. It is generally accepted that in infected individuals, a narrow repertoire of exhausted T cells is a hallmark of persistent infection, whereas broad vigorous CD4(+) and CD8(+) T cell responses are associated with control of acute hepatitis C...
April 26, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28446610/conformational-changes-at-cytoplasmic-inter-subunit-interactions-control-kir-channel-gating
#9
Shizhen Wang, William F Borschel, Sarah Heyman, Phillip Hsu, Colin G Nichols
The defining structural feature of inward-rectifier potassium (Kir) channels is the unique Kir cytoplasmic domain. Recently, we have shown that salt bridges located at the cytoplasmic domain subunit interfaces (CD-Is) of eukaryotic Kir channels control channel gating via stability of a novel inactivated closed state. The cytoplasmic domains of prokaryotic and eukaryotic Kir channels show similar conformational rearrangements to the common gating ligand, phosphatidylinositol bisphosphate (PIP2), although this exhibits opposite coupling to opening and closing transitions...
April 26, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28446052/effective-intraperitoneal-gene-transfection-system-using-nanobubbles-and-ultrasound-irradiation
#10
Koyo Nishimura, Shintaro Fumoto, Yuki Fuchigami, Masayori Hagimori, Kazuo Maruyama, Shigeru Kawakami
In this study, we demonstrate the low toxicity and highly efficient and spatially improved transfection of plasmid DNA (pDNA) with liposomal nanobubbles (bubble liposomes [BLs]) using ultrasound (US) irradiation in mice. Naked pDNA with BLs was intraperitoneally injected, followed by US irradiation. The injection volume, the duration of US irradiation, and the dose of BLs were optimized. Both BLs and US irradiation were essential to achieve high transgene expression from naked pDNA. We observed transgene expression in the entire peritoneal tissues, including the peritoneal wall, liver, spleen, stomach and small and large intestines...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28446032/the-effect-of-intravesical-liposome-based-ngf-antisense-therapy-on-bladder-overactivity-and-nociception-in-a-rat-model-of-cystitis-induced-by-hydrogen-peroxide
#11
Tsuyoshi Majima, Pradeep Tyagi, Koji Dogishi, Mahendra Kashyap, Yasuhito Funahashi, Momokazu Gotoh, Michael Chancellor, Naoki Yoshimura
Objective We investigated the effect of intravesical liposome-based NGF antisense therapy on bladder overactivity and nociception in a rat model of cystitis induced by hydrogen peroxide (HP). Study design, materials and methods 1) HP (1.5%) was administered into the bladder on day 0. Liposomes conjugated with NGF antisense oligonucleotide (OND) tagged with TYE563 fluorescent protein was given into the bladder on day 2. The expression of TYE563 was observed under a fluorescent microscope on day 3. 2) In another set of experiments, rats were divided into 4 groups: (a) sham- liposome group, (b) sham-OND group, (c) cystitis- liposome group and (d) cystitis-OND group...
April 27, 2017: Human Gene Therapy
https://www.readbyqxmd.com/read/28445764/development-of-light-driven-gas-forming-liposomes-for-efficient-tumor-treatment
#12
Jae Min Lee, Yu Seok Youn, Eun Seong Lee
In this study, we report a gas-forming liposome containing 1H-1H-2H-perfluoro-1-hexene (PFH) and gold nanoparticles (AuNPs). These liposomes were rapidly destabilized by external near-infrared (NIR) light, as a result of the vaporization of PFH influenced by an AuNPs-mediated photothermal event. In particular, these liposomes showed the triggered release of the encapsulated D-(KLAKLAK)2 peptide drug. The experimental results demonstrated that the light-irradiated liposomes significantly enhanced in vitro photothermal and D-(KLAKLAK)2 peptide-mediated cell death of CAOV-3 tumor cells...
April 23, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28445611/equivalence-of-complex-drug-products-advances-in-and-challenges-for-current-regulatory-frameworks
#13
Leonie Hussaarts, Stefan Mühlebach, Vinod P Shah, Scott McNeil, Gerrit Borchard, Beat Flühmann, Vera Weinstein, Sesha Neervannan, Elwyn Griffiths, Wenlei Jiang, Elena Wolff-Holz, Daan J A Crommelin, Jon S B de Vlieger
Biotechnology and nanotechnology provide a growing number of innovator-driven complex drug products and their copy versions. Biologics exemplify one category of complex drugs, but there are also nonbiological complex drug products, including many nanomedicines, such as iron-carbohydrate complexes, drug-carrying liposomes or emulsions, and glatiramoids. In this white paper, which stems from a 1-day conference at the New York Academy of Sciences, we discuss regulatory frameworks in use worldwide (e.g., the U...
April 26, 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28445610/population-pharmacokinetics-of-liposomal-irinotecan-in-patients-with-cancer
#14
Bambang Adiwijaya, Jaeyeon Kim, Istvan Lang, Tibor Csõszi, Antonio Cubillo, Jen-Shi Chen, Mark Wong, Joon Oh Park, Jun Suk Kim, Kun Ming Rau, Bohuslav Melichar, Javier Gallego, Jonathan Fitzgerald, Bruce Belanger, Istvan Molnar, Wen Wee Ma
nal-IRI is a liposomal formulation of irinotecan with a longer half-life (t1/2 ), higher plasma total irinotecan (tIRI), and lower SN-38 maximum concentration (Cmax ) compared with non-liposomal irinotecan. Population pharmacokinetic (PK) analysis of nal-IRI was performed for tIRI and total SN-38 (tSN38) using patient samples from 6 studies. PK-safety association was evaluated for neutropenia and diarrhea in 353 patients. PK-efficacy association was evaluated from a phase 3 study in pancreatic cancer NAPOLI1...
April 26, 2017: Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28444913/vesicle-origami-cuboid-phospholipid-vesicles-formed-by-template-free-self-assembly
#15
Frederik Neuhaus, Dennis Mueller, Radu Tanasescu, Sandor Balog, Takashi Ishikawa, Gerald Brezesinski, Andreas Zumbuehl
Phospholipid liposomes are archetypical self-assembled structures. To minimize the surface tension, the vesicles typically are spherical. Deciphering the bilayer code, the basic physical interactions between phospholipids would allow these molecules to be utilized as building blocks for novel, non-spherical structures. A 1,2-diamidophospholipid is presented that self-assembles into a cuboid structure. Owing to intermolecular hydrogen bonding, the bilayer membranes form an exceptionally tight subgel packing, leading to a maximization of flat structural elements and a minimization of any edges...
April 26, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28444771/oestrone-targeted-liposomes-for-mitoxantrone-delivery-via-oestrogen-receptor-synthesis-physicochemical-characterization-and-in-vitro-evaluation
#16
Qiang Hao, Guoxing Xu, Yue Yang, Yuxin Sun, Dengli Cong, Hongrui Li, Xin Liu, Zeng Wang, Zheng Zhang, Jinglin Chen, Yao Li, Xue Luan, Lin Wang, Lin Tian, Kun Liu, Yan Li, Qianru Jiao, Jin Pei
OBJECTIVES: Targeted delivery of mitoxantrone (MTO, an anthraquinone drug with high antitumour effect) may be achieved using a novel nanoparticulate delivery system via binding the oestrogen receptor (ER, highly expressed in a variety of human tumours). METHODS: A novel liposomal nanoparticle (NP) was developed using a conjugate derived from 1, 2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[amino (polyethylene glycol)-2000] (DSPE-PEG2000 -NH2 ) and oestrone (ES, is known to bind the ER) to produce an ES-targeted PEGylated liposome (ES-SSL)...
April 26, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28444443/-new-approaches-for-the-prevention-of-actinic-keratosis
#17
REVIEW
H Stege, J Krutmann
Actinic keratosis is one of the most common skin diseases. Because of the ongoing demographic changes, it is anticipated that the incidence will further increase. Prevention of actinic keratoses is thus of great importance. By far the most important cause of actinic keratoses is the chronic cumulative irradiation of human skin with ultraviolet B and A radiation from natural sunlight. There is no doubt that use of sunscreens is effective in preventing actinic keratoses. Recent studies indicate that in high-risk groups the regular use of medical devices which are characterized by a very high SPF and which contain liposomally encapsulated DNA repair enzymes are effective in preventing the development of new actinic keratoses even when field cancerization is already present in human skin...
April 25, 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
https://www.readbyqxmd.com/read/28444248/effects-of-various-spacers-between-biotin-and-the-phospholipid-headgroup-on-immobilization-and-sedimentation-of-biotinylated-phospholipid-containing-liposomes-facilitated-by-avidin-biotin-interactions
#18
Yasuhisa Sakamoto, Koji Kikuchi, Kazuaki Umeda, Hiroyuki Nakanishi
Immobilization and sedimentation of liposomes (lipid vesicles) are used in liposome-protein binding assays, facilitated by avidin/streptavidin/NeutrAvidin and biotinylated phospholipid-containing liposomes. Here, we examined the effects of three spacers [six-carbon (X), polyethylene glycol (PEG) 180 (molecular weight 180), and PEG2000 (molecular weight 2000)] between biotin and the phospholipid headgroup on the immobilization and sedimentation of small unilamellar liposomes/vesicles (SUVs). PEG180 and PEG2000 showed more efficient immobilization of biotinylated SUVs on NeutrAvidin-coated plates than X, but X and PEG180 showed more efficient sedimentation of biotinylated SUVs upon NeutrAvidin addition than PEG2000...
April 24, 2017: Journal of Biochemistry
https://www.readbyqxmd.com/read/28443984/antifungal-activity-of-caspofungin-in-experimental-infective-endocarditis-caused-by-candida-albicans
#19
Gerardo Becerra Victorio, Lorena Michele Brennan Bourdon, Leonel García Benavides, Selene G Huerta-Olvera, Arturo Plascencia, José Villanueva, Erika Martinez-Lopez, Iván Isidro Hernández-Cañaveral
BACKGROUND: Infective endocarditis is a disease characterised by heart valve lesions, which exhibit extracellular matrix proteins that act as a physical barrier to prevent the passage of antimicrobial agents. The genus Candida has acquired clinical importance given that it is increasingly being isolated from cases of nosocomial infections. OBJECTIVE: To evaluate the activity of caspofungin compared to that of liposomal amphotericin B against Candida albicans in experimental infective endocarditis...
May 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28443362/effect-of-the-side-chain-spacer-structure-on-the-ph-responsive-properties-of-polycarboxylates
#20
Atsushi Harada, Ryoma Teranishi, Eiji Yuba, Kenji Kono
The properties of stimuli-responsive polymers change significantly with changes to their environment, such as temperature and pH. This behavior can be utilized for the preparation of stimuli-responsive carriers for efficient cytosolic delivery of active drugs. Among the possible environmental conditions, pH is one of the most useful stimuli because the pH in an endosome is lower than under physiological conditions, depending on endosomal development. This pH difference is an important factor in the design of pH-responsive polymers, which can be used to enhance the transport of endocytosed drugs from the endosomal compartment to the cytoplasm...
April 26, 2017: Journal of Biomaterials Science. Polymer Edition
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