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Non-viral AND transfection

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https://www.readbyqxmd.com/read/28219808/photoluminescent-and-biodegradable-polycitrate-polyethylene-glycol-polyethyleneimine-polymers-as-highly-biocompatible-and-efficient-vectors-for-bioimaging-guided-sirna-and-mirna-delivery
#1
Min Wang, Yi Guo, Meng Yu, Peter X Ma, Cong Mao, Bo Lei
: Development of biodegradable and biocompatible non-viral vectors with intrinsical multifunctional properties such as bioimaging ability for highly efficient nucleic acids delivery still remains a challenge. Here, a biodegradable poly (1, 8-octanedio-citric acid)-co-polyethylene glycol grafted with polyethyleneimine (PEI) (POCG-PEI) polymers with the photoluminescent capacity were synthesized for nucleic acids delivery (siRNA and miRNA). POCG-PEI polymers can efficiently bind various nucleic acids, protect them against enzymatic degradation and release the genes in the presence of polyanionic heparin...
February 17, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28216965/mutational-analysis-of-hepatitis-e-virus-orf1-y-domain-effects-on-rna-replication-and-virion-infectivity
#2
Mohammad Khalid Parvez
AIM: To investigate the role of non-structural open reading frame 1 "Y-domain" sequences in the hepatitis E virus (HEV) life cycle. METHODS: Sequences of human HEV Y-domain (amino acid sequences 216-442) and closely-related viruses were analyzed in silico. Site-directed mutagenesis of the Y-domain (HEV SAR55) was carried out and studied in the replicon-baculovirus-hepatoma cell model. In vitro transcribed mRNA (pSK-GFP) constructs were transfected into S10-3 cells and viral RNA replicating GFP-positive cells were scored by flow cytometry...
January 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28214630/ph-and-reduction-dual-responsive-dipeptide-cationic-lipids-with-%C3%AE-tocopherol-hydrophobic-tail-for-efficient-gene-delivery
#3
Qiang Liu, Rong-Chuan Su, Wen-Jing Yi, Li-Ting Zheng, Shan-Shan Lu, Zhi-Gang Zhao
A series of tocopherol-based cationic lipid 3a-3f bearing a pH-sensitive imidazole moiety in the dipeptide headgroup and a reduction-responsive disulfide linkage were designed and synthesized. Acid-base titration of these lipids showed good buffering capacities. The liposomes formed from 3 and co-lipid 1, 2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) could efficiently bind and condense DNA into nanoparticles. Gel binding and HPLC assays confirmed the encapsulated DNA could release from lipoplexes 3 upon addition of 10 mM glutathione (GSH)...
February 12, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28210815/structural-proteins-of-helicoverpa-armigera-densovirus-2-enhance-transcription-of-viral-genes-through-transactivation
#4
Pengjun Xu, He Yuan, Xianming Yang, Robert I Graham, Kaiyu Liu, Kongming Wu
Herein, we report the identification of putative promoters for the non-structural proteins (NS) and capsid structural proteins (VP) of Helicoverpa armigera densovirus (HaDV2) as well as a potential mechanism for how these promoters might be regulated. For the first time, we report that VP is able to transactivate the VP promoter and, to a lesser degree, the NS promoter in densoviruses. In addition to this, another promoter-like sequence designated P2, when co-transfected with the VP gene, enhanced luciferase activity by approximately 35 times compared to a control...
February 16, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28199098/compaction-and-transmembrane-delivery-of-pdna-differences-between-l-pei-and-two-types-of-amphiphilic-block-copolymers
#5
Alexander Raup, Hui Wang, Christopher V Synatschke, Valerie Jerome, Seema Agarwal, Dmitry V Pergushov, Axel H E Mueller, Ruth Freitag
Polycations are popular agents for non-viral delivery of DNA to mammalian cells. Adding hydrophobic, biodegradable, or cell penetrating functions could help to improve their performance, which at present is below that of viral agents. A crucial first step in gene delivery is the complexation of the DNA. The characteristics of these 'polyplexes' presumably influence or even determine the subsequent steps of membrane passage, intracellular travelling / DNA release, and nuclear up-take. Herein, polyplexes formed with linear poly(ethylenimine) (l-PEI) are compared to complexes generated with functionalized diblock copolymers...
February 15, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28197596/amphiphilic-polymers-formed-from-ring-opening-polymerization-a-strategy-for-the-enhancement-of-gene-delivery
#6
Yi-Mei Zhang, Zheng Huang, Ji Zhang, Wan-Xia Wu, Yan-Hong Liu, Xiao-Qi Yu
Cationic liposomes and polymers are both important candidates for use as non-viral gene vectors. However, both of them have special shortcomings and application limits. This work is devoted to the combination of advantages of liposomes and polymers. The ring-opening polymerization strategy was used for the preparation of amphiphilic polymers from cyclen-based cationic small lipids. The non-hydrophobic polymer and the corresponding lipids were also prepared for performing structure-activity relationship studies...
February 15, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28194746/stimuli-responsive-polymeric-nanocarriers-for-efficient-gene-delivery
#7
REVIEW
Yingqin Li, Jinbiao Gao, Chao Zhang, Zhong Cao, Du Cheng, Jie Liu, Xintao Shuai
Gene therapy provides an alternative and effective method for treatment of genetic diseases and cancers that are refractory to conventional therapeutics. The success of gene therapy is largely dependent on the development of safe and effective gene delivery vectors for transporting genetic material from the blood stream to the cytoplasm or nucleus. Current gene vectors can be divided into viral and non-viral vectors. Although non-viral gene delivery carriers can offer some advantages, such as safety and facile fabrication, they do not possess the same high gene transfection efficiency as viral vectors due to a lack of functionality to overcome extra- and intracellular gene delivery obstacles...
April 2017: Topics in Current Chemistry (Journal)
https://www.readbyqxmd.com/read/28185961/non-viral-vectors-based-on-magnetoplexes-lipoplexes-and-polyplexes-for-vegf-gene-delivery-into-central-nervous-system-cells
#8
Ilia Villate-Beitia, Gustavo Puras, Cristina Soto-Sánchez, Mireia Agirre, Edilberto Ojeda, Jon Zarate, Eduardo Fernández, José Luis Pedraz
Nanotechnology based non-viral vectors hold great promise to deliver therapeutic genes into the central nervous system (CNS) in a safe and controlled way. Vascular endothelial growth factor (VEGF) is a potential therapeutic gene candidate for CNS disorders due to its specific roles in brain angiogenesis and neuroprotection. In this work, we elaborated three different non-viral vectors based on magnetic, cationic lipid and polymeric nanoparticles complexed to the phVEGF165aIRESGFP plasmid, which codifies the VEGF protein -extracellular- and the green fluorescent protein (GFP) -intracellular-...
February 6, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28166648/characteristics-of-minimally-oversized-adeno-associated-virus-vectors-encoding-human-factor-viii-generated-using-producer-cell-lines-and-triple-transfection
#9
Bindu Nambiar, Cathleen Cornell Sookdeo, Patricia Berthelette, Robert Jackson, Susan Piraino, Brenda Burnham, Shelley Nass, David Souza, Catherine R O'Riordan, Karen A Vincent, Seng H Cheng, Donna Armentano, Sirkka Kyostio-Moore
Several ongoing clinical studies are evaluating recombinant adeno-associated virus (rAAV) vectors as gene delivery vehicles for a variety of diseases. However, the production of vectors with genomes >4.7 kb is challenging, with vector preparations frequently containing truncated genomes. To determine whether the generation of oversized rAAVs can be improved using a producer cell-line (PCL) process, HeLaS3-cell lines harboring either a 5.1 or 5.4 kb rAAV vector genome encoding codon-optimized cDNA for human B-domain deleted Factor VIII (FVIII) were isolated...
February 2017: Human Gene Therapy Methods
https://www.readbyqxmd.com/read/28165729/harmonizing-the-intracellular-kinetics-toward-effective-gene-delivery-using-cancer-cell-targeted-and-light-degradable-polyplexes
#10
Benchun Jiang, Hua He, Li Yao, Tong Zhang, Jianping Huo, Wei Sun, Lichen Yin
The success of non-viral gene delivery is often restricted by the multiple cellular barriers that posed inconsistent requirements for vector design. High molecular weight (MW) and cationic charge density are required for polycations to enable effective gene encapsulation, which however, also lead to high toxicity, restricted intracellular cargo release, and poor serum resistance. We herein developed crosslinked polyethyleneimine (PEI) with built-in UV-responsive domains (NP-PEI) which can effectively condense DNA while rapidly de-crosslink upon light triggers to promote intracellular DNA release and reduce material toxicity...
February 6, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28159719/improvement-of-osteogenesis-in-dental-pulp-pluripotent-like-stem-cells-by-oligopeptide-modified-poly-%C3%A3-amino-ester-s
#11
Raquel Núñez-Toldrà, Pere Dosta, Sheyla Montori, Víctor Ramos, Maher Atari, Salvador Borrós
: Controlling pluripotent stem cell differentiation via genetic manipulation is a promising technique in regenerative medicine. However, the lack of safe and efficient delivery vehicles limits this application. Recently, a new family of poly (β-amino ester)s (pBAEs) with oligopeptide-modified termini showing high transfection efficiency of both siRNA and DNA plasmid has been developed. In this study, oligopeptide-modified pBAEs were used to simultaneously deliver anti-OCT3/4 siRNA, anti-NANOG siRNA, and RUNX2 plasmid to cells from the dental pulp with pluripotent-like characteristics (DPPSC) in order to promote their osteogenic differentiation...
January 31, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28152517/novel-hbsag-mutations-correlate-with-hepatocellular-carcinoma-hamper-hbsag-secretion-and-promote-cell-proliferation-in-vitro
#12
Romina Salpini, Matteo Surdo, Nadia Warner, Maria Francesca Cortese, Danny Colledge, Sally Soppe, Maria Concetta Bellocchi, Daniele Armenia, Luca Carioti, Fabio Continenza, Domenico Di Carlo, Patrizia Saccomandi, Carmen Mirabelli, Michela Pollicita, Roberta Longo, Sara Romano, Giuseppina Cappiello, Alberto Spanò, Pascale Trimoulet, Herve Fleury, Jacopo Vecchiet, Nerio Iapadre, Angelo Barlattani, Ada Bertoli, Terenzio Mari, Caterina Pasquazzi, Gabriele Missale, Cesare Sarrecchia, Elisa Orecchini, Alessandro Michienzi, Massimo Andreoni, Simona Francioso, Mario Angelico, Jens Verheyen, Francesca Ceccherini-Silberstein, Stephen Locarnini, Carlo Federico Perno, Valentina Svicher
BACKGROUND: An impaired HBsAg-secretion can increase HBV oncogenic-properties. Here, we investigate genetic-determinants in HBsAg correlated with HBV-induced hepatocellular carcinoma (HCC), and their impact on HBsAg-secretion and cell-proliferation. METHODS: This study included 128 chronically HBV-infected patients: 23 with HCC (73.9% D; 26.1% A HBV-genotype), and 105 without cirrhosis/HCC (72.4% D, 27.6% A) as reference-group. The impact of mutations on HBsAg-secretion was assessed by measuring the ratio [secreted/intracellular HBsAg] until day 5 post-transfection...
February 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28152180/magnetic-nanoparticle-mediated-gene-delivery-to-two-and-three-dimensional-neural-stem-cell-cultures-magnet-assisted-transfection-and-multifection-approaches-to-enhance-outcomes
#13
Mark R Pickard, Christopher F Adams, Divya M Chari
Neural stem cells (NSCs) have high translational potential in transplantation therapies for neural repair. Enhancement of their therapeutic capacity by genetic engineering is an important goal for regenerative neurology. Magnetic nanoparticles (MNPs) are major non-viral vectors for safe bioengineering of NSCs, offering critical translational benefits over viral vectors, including safety, scalability, and ease of use. This unit describes protocols for the production of suspension (neurosphere) and adherent (monolayer) murine NSC cultures...
February 2, 2017: Current Protocols in Stem Cell Biology
https://www.readbyqxmd.com/read/28128339/nano-biomimetic-carriers-are-implicated-in-mechanistic-evaluation-of-intracellular-gene-delivery
#14
Mohsen Alipour, Saman Hosseinkhani, Reza Sheikhnejad, Roya Cheraghi
Several tissue specific non-viral carriers have been developed for gene delivery purposes. However, the inability to escape endosomes, undermines the efficacy of these carriers. Researchers inspired by HIV and influenza virus, have randomly used Gp41 and H5WYG fusogenic peptides in several gene delivery systems without any rational preference. Here for the first time, we have genetically engineered two Nano-biomimetic carriers composed of either HWYG (HNH) or Gp41 (GNH) that precisely provide identical conditions for the study and evaluation of these fusogenic peptides...
January 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28128214/promising-gene-delivery-system-based-on-polyethylenimine-modified-silica-nanoparticles
#15
M Babaei, H Eshghi, Kh Abnous, M Rahimizadeh, M Ramezani
This article reports on the synthesis and full characterization of innovative silica-based nanoparticle composed of fumed silica as a core decorated with polyethylenimine (PEI) with different molecular weights (25, 10 and 1.8 kDa). Wide range of analytical, spectroscopic, and microscopic methods (TEM, DLS, ζ potential, elemental analysis (EA), TNBS and FTIR) were used to characterize the nanoparticles. Furthermore, transfection efficiency of these nanoparticles as non-viral vector was examined. The silica-PEI conjugates retained both the ability of PEI to fully condense plasmid DNA at low N/P ratios and suitable buffering capacity at the endosomal pH range...
January 27, 2017: Cancer Gene Therapy
https://www.readbyqxmd.com/read/28122984/parvovirus-expresses-a-small-noncoding-rna-that-plays-an-essential-role-in-virus-replication
#16
Zekun Wang, Weiran Shen, Fang Cheng, Xuefeng Deng, John F Engelhardt, Ziying Yan, Jianming Qiu
: Human bocavirus 1 (HBoV1) belongs to species Primate bocaparvovirus of the genus Bocaparvovirus of the Parvoviridae family. HBoV1 causes acute respiratory tract infections in young children and has a selective tropism for the apical surface of well-differentiated human airway epithelia (HAE). In this study, we identify an additional HBoV1 gene, bocavirus-transcribed small non-coding RNA (BocaSR) within the 3' non-coding region (nt 5199-5338) of the viral genome of positive sense. BocaSR is transcribed by RNA polymerase III (Pol III) from an intragenic promoter at similar levels to that of the capsid protein-coding mRNA and is essential for replication of the viral DNA in both transfected HEK293 and infected HAE cells...
January 25, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28113048/large-t-antigen-variants-of-human-polyomaviruses-9-and-12-and-seroreactivity-against-their-n-terminus
#17
Sarah-Verena Korup-Schulz, Claudia Lucke, Rosa Schmuck, Ugo Moens, Bernhard Ehlers
The tumor antigens (TAgs) of mammalian polyomaviruses (PyVs) are key proteins responsible for modulating the host cell cycle and involved in virus replication as well as cell transformation and tumor formation. Here we aimed at identifying mRNA sequences of known and novel TAgs encoded by the recently discovered human polyomaviruses 9 and 12 (HPyV9 and HPyV12) in cell culture. Synthetic viral genomes were transfected into human and animal cell lines. Gene expression occurred in most cell lines, as measured by qPCR of cDNA copies of mRNA encoding major structural protein VP1...
January 22, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28110069/peptide-and-nucleic-acid-directed-self-assembly-of-cationic-nanovehicles-through-giant-unilamellar-vesicle-modification-targetable-nanocomplexes-for-in-vivo-nucleic-acid-delivery
#18
A D Tagalakis, R Maeshima, C Yu-Wai-Man, J Meng, F Syed, L-P Wu, A M Aldossary, D McCarthy, S M Moghimi, S L Hart
: One of the greatest challenges for the development of genetic therapies is the efficient targeted delivery of therapeutic nucleic acids. Towards this goal, we have introduced a new engineering initiative in self-assembly of biologically safe and stable nanovesicle complexes (∼90-140 nm) derived from giant unilamellar vesicle (GUV) precursors and comprising plasmid DNA or siRNA and targeting peptide ligands. The biological performance of the engineered nanovesicle complexes were studied both in vitro and in vivo and compared with cationic liposome-based lipopolyplexes...
January 18, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28103530/an-anti-oxidant-%C3%AE-lipoic-acid-conjugated-oleoyl-sn-phosphatidylcholineas-a-helper-lipid-in-cationic-liposomal-formulations
#19
Priya Dharmalingam, Balakrishna Marrapu, Chandrashekhar Voshavar, Rasagna Nadella, Vignesh Kumar Rangasami, R V Shaji, Salar Abbas, R B N Prasad, Shiva Shanker Kaki, Srujan Marepally
Development of safe non-viral carrier systems for efficient intra-cellular delivery of drugs and genes hold promise in the area of translational research. Liposome based delivery systems have emerged as one of the attractive strategies for efficient delivery of drugs and nucleic acids. To this end, number of investigations was carried on liposomal formulations using lipids for achieving higher efficiency in transfection with lower cytotoxicities. In our efforts to develop safer and efficient liposomal delivery systems, we synthesized a novel anti-oxidant lipid, α-lipoyl, oleyl-sn-phosphatidylcholine (LOPC) and used as a helper lipid in combination with a cationic amphiphile, Di-Stearyl Dihydroxy Ethyl Ammonium Chloride (DSDEAC) and 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) at varying concentrations of LOPC...
January 10, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28101458/cationic-liposomes-modified-with-polyallylamine-as-a-gene-carrier-preparation-characterization-and-transfection-efficiency-evaluation
#20
Reza Kazemi Oskuee, Asma Mahmoudi, Leila Gholami, Alireza Rahmatkhah, Bizhan Malaekeh-Nikouei
Purpose: Cationic polymers and cationic liposomes have shown to be effective non-viral gene delivery vectors. In this study, we tried to improve the transfection efficiency by employing the advantages of both. Methods: For this purpose, modified polyallylamines (PAAs) were synthesized. These modifications were done through the reaction of PAA (15 KDa) with acrylate and 6-bromoalkanoic acid derivatives. Liposomes comprising of these cationic polymers and cationic lipid were prepared and extruded through polycarbonate filters to obtain desired size...
December 2016: Advanced Pharmaceutical Bulletin
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