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https://www.readbyqxmd.com/read/28736158/nanoliposomes-carrying-her2-neu-derived-peptide-ae36-with-cpg-odn-exhibit-therapeutic-and-prophylactic-activities-in-a-mice-tubo-model-of-breast-cancer
#1
Nastaran Barati, Amin Reza Nikpoor, Atefeh Razazan, Fatemeh Mosaffa, Ali Badiee, Atefeh Arab, Zahra Gholizadeh, Javad Behravan, Mahmoud Reza Jaafari
This study was designed to prepare and characterize nanoliposomal vaccine formulation encapsulating AE36 HER2/neu-derived peptide with or without CpG and evaluate the immunologic and therapeutic responses of that in BALB/c mice model of Her2 overexpressing breast cancer. AE36 was encapsulated in liposomes composed of DOTAP, DOPE and Cholesterol (DDC) or DD with. The formulations could induce both CD8+ and CD4+ responses and stimulate production of cytokines which was detected by Enzyme-linked immunospot assay (ELISpot) kits, cytotoxicity test and intracellular cytokine assay by flow cytometry...
July 20, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28729400/vessel-targeted-chemophototherapy-with-cationic-porphyrin-phospholipid-liposomes
#2
Dandan Luo, Jumin Geng, Nasi Li, Kevin A Carter, Shuai Shao, G Ekin Atilla-Gokcumen, Jonathan F Lovell
Cationic liposomes have been used for targeted drug delivery to tumor blood vessels, via mechanisms that are not fully elucidated. Doxorubicin (Dox)-loaded liposomes were prepared that incorporate a cationic lipid; 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP), along with a small amount of porphyrin-phospholipid (PoP). Near infrared (NIR) light induced release of entrapped Dox via PoP-mediated DOTAP photo-oxidation. The formulation was optimized to enable extremely rapid NIR light-triggered Dox release (i...
July 20, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28680130/surface-chemistry-for-cytosolic-gene-delivery-and-photothermal-transgene-expression-by-gold-nanorods
#3
Hirotaka Nakatsuji, Kelly Kawabata Galbraith, Junko Kurisu, Hiroshi Imahori, Tatsuya Murakami, Mineko Kengaku
Light-inducible gene regulation has great potential for remote and noninvasive control of the fate and function of target cells. One method to achieve such control is delivery of heat shock protein (HSP) promoter-driven protein expression vectors and photothermal heaters into the cells, followed by activation by illumination. In this study, we show that gold nanorods (AuNRs) functionalized with two conventional lipids, oleate and 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP), are capable of efficient transfection and quick photoactivation of the HSP promoter...
July 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28669809/functional-nanosome-for-enhanced-mitochondria-targeted-gene-delivery-and-expression
#4
Yoonhee Bae, Min Kyo Jung, Su Jeong Song, Eric S Green, Seulgi Lee, Hyun-Sook Park, Seung Hun Jeong, Jin Han, Ji Young Mun, Kyung Soo Ko, Joon Sig Choi
Mitochondria dysfunction plays a role in many human diseases. Therapeutic techniques for these disorders require novel delivery systems that can specifically target and penetrate mitochondria. In this study, we report a novel nanosome composed of dequalinium-DOTAP-DOPE (1,2 dioleoyl-3-trimethylammonium-propane-1,2-dioleoyl-sn-glycero-3-phosphoethanolamine) (DQA80s) as a potential mitochondria-targeting delivery vector. The functional DQAsome, DQA80s, showed enhanced transfection efficiency compared to a vector DQAsomes in HeLa cells and dermal fibroblasts...
June 29, 2017: Mitochondrion
https://www.readbyqxmd.com/read/28655658/multifunctional-peptide-lipid-nanocomplexes-for-efficient-targeted-delivery-of-dna-and-sirna-into-breast-cancer-cells
#5
Yu Wan, Wei Dai, Reshma J Nevagi, Istvan Toth, Peter M Moyle
The development of carriers for the delivery of oligonucleotide therapeutics is essential for the successful translation of gene therapies to the clinic. In the present study, a delivery system, which combines the fusogenic lipid 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine (DOPE) with a well-defined synthetic multifunctional peptide, was produced and optimized for gene delivery, with the aim to develop an efficient gene delivery platform for breast cancer cells. For this purpose, a breast cancer-specific cell targeting peptide (CTP) was incorporated into our leading peptide-based gene delivery system (to generate DEN-K(GALA)-TAT-K(STR)-CTP) to improve its cell-specific internalization, and investigated in combination with a formulation approach (DOPE/1,2-dioleoyl-3-trimethylammonium-propane (DOTAP))...
June 24, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28652397/b-cells-produce-type-1-ifns-in-response-to-the-tlr9-agonist-cpg-a-conjugated-to-cationic-lipids
#6
Munir Akkaya, Billur Akkaya, Pietro Miozzo, Mukul Rawat, Mirna Pena, Patrick W Sheehan, Ann S Kim, Olena Kamenyeva, Juraj Kabat, Silvia Bolland, Akanksha Chaturvedi, Susan K Pierce
B cells express the innate receptor, TLR9, which signals in response to unmethylated CpG sequences in microbial DNA. Of the two major classes of CpG-containing oligonucleotides, CpG-A appears restricted to inducing type 1 IFN in innate immune cells and CpG-B to activating B cells to proliferate and produce Abs and inflammatory cytokines. Although CpGs are candidates for adjuvants to boost innate and adaptive immunity, our understanding of the effect of CpG-A and CpG-B on B cell responses is incomplete. In this study we show that both CpG-B and CpG-A activated B cells in vitro to proliferate, secrete Abs and IL-6, and that neither CpG-B nor CpG-A alone induced type 1 IFN production...
June 26, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28639178/effective-skin-cancer-treatment-by-topical-co-delivery-of-curcumin-and-stat3-sirna-using-cationic-liposomes
#7
Anup Jose, Suman Labala, Kunal Manoj Ninave, Sudeep Kumar Gade, Venkata Vamsi Krishna Venuganti
The aim of the present study was to evaluate the effectiveness of iontophoretic co-delivery of curcumin and anti-STAT3 siRNA using cationic liposomes against skin cancer. Curcumin was encapsulated in DOTAP-based cationic liposomes and then complexed with STAT3 siRNA. This nanocomplex was characterized for the average particle size, zeta-potential, and encapsulation efficiency. The cell viability studies in B16F10 mouse melanoma cells have shown that the co-delivery of curcumin and STAT3 siRNA significantly (p < 0...
June 21, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/28636657/novel-sirna-formulation-to-effectively-knockdown-mutant-p53-in-osteosarcoma
#8
Anup K Kundu, Swathi V Iyer, Sruti Chandra, Amit S Adhikari, Tomoo Iwakuma, Tarun K Mandal
OBJECTIVES: The tumor suppressor p53 plays a crucial role in the development of osteosarcoma. The primary objective of this study is to develop and optimize lipid based nanoparticle formulations that can carry siRNA and effectively silence mutant p53 in 318-1, a murine osteosarcoma cell line. METHODS: The nanoparticles were composed of a mixture of two lipids (cholesterol and DOTAP) and either PLGA or PLGA-PEG and prepared by using an EmulsiFlex-B3 high pressure homogenizer...
2017: PloS One
https://www.readbyqxmd.com/read/28578092/construction-of-human-masp-2-ccp1-2sp-ccp2sp-sp-plasmid-dna-nanolipoplexes-and-the-effects-on-tuberculosis-in-bcg-infected-mice
#9
Qi Gao, Xinfang Dong, Yanping Luo, Guochao Zhang, Jinyu Shan, Qian Wang, Qi He, Lifeng Zhang, Jingqiu Wang, Bingdong Zhu, Xingming Ma
The lectin pathway, one of the complement cascade systems, provides the primary line of defense against invading pathogens. The serine protease of MASP-2 plays an essential role in complement activation of the lectin pathway. The C-terminal segment of MASP-2 is comprised of the CCP1-CCP2-SP domains, and is the crucial catalytic segment. However, what is the effect of CCP1-CCP2-SP domains in controlling chronic infection is unknown. In order to evaluate the potential impact of CCP1-CCP2-SP domains on tuberculosis, we constructed the human MASP-2 CCP1/2SP, CCP2SP and SP recombinant plasmids, and delivered these plasmids by DNA-DOTAP:cholesterol cationic nanolipoplexes to BCG-infected mice...
May 31, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28550752/intracellular-delivery-of-oligonucleotides-in-helicobacter-pylori-by-fusogenic-liposomes-in-the-presence-of-gastric-mucus
#10
Rita S Santos, George R Dakwar, Elisa Zagato, Toon Brans, Céu Figueiredo, Koen Raemdonck, Nuno F Azevedo, Stefaan C De Smedt, Kevin Braeckmans
The rising antimicrobial resistance contributes to 25000 annual deaths in Europe. This threat to the public health can only be tackled if novel antimicrobials are developed, combined with a more precise use of the currently available antibiotics through the implementation of fast, specific, diagnostic methods. Nucleic acid mimics (NAMs) that are able to hybridize intracellular bacterial RNA have the potential to become such a new class of antimicrobials and additionally could serve as specific detection probes...
September 2017: Biomaterials
https://www.readbyqxmd.com/read/28530287/microfluidic-self-assembly-of-folate-targeted-monomolecular-sirna-lipid-nanoparticles
#11
R Krzysztoń, B Salem, D J Lee, G Schwake, E Wagner, J O Rädler
Non-viral delivery of nucleic acids for therapies based on RNA interference requires a rational design and optimal self-assembly strategies. Nucleic acid particles need to be small, stable and functional in terms of selective cell uptake and controlled release of encapsulated nucleic acids. Here we report on small (∼38 nm) monomolecular nucleic acid/lipid particles (mNALPs) that contain single molecules of short double-stranded oligonucleotides covered by a tight, highly curved lipid bilayer. The particles consist of DOPE, DOTAP, DOPC and DSPE-PEG(2000) and are assembled with 21 bp double-stranded DNA or small interfering RNA by solvent exchange on a hydrodynamic-focusing microfluidic chip...
June 8, 2017: Nanoscale
https://www.readbyqxmd.com/read/28525888/combination-of-desi2-and-ip10-gene-therapy-significantly-improves-therapeutic-efficacy-against-murine-carcinoma
#12
Chao Lin, HuaYing Yan, Jun Yang, Lei Li, Mei Tang, Xinyu Zhao, Chunlai Nie, Na Luo, Yuquan Wei, Zhu Yuan
DESI2 (also known as PNAS-4) is a novel pro-apoptotic gene activated during the early response to DNA damage. We previously reported that overexpression of DESI2 induces S phase arrest and apoptosis by activating checkpoint kinases. The present study was designed to test whether combination of DESI2 and IP10 could improve the therapy efficacy in vitro and in vivo. The recombinant plasmid co-expressing DESI2 and IP10 was encapsulated with DOTAP/Cholesterol nanoparticle. Immunocompetent mice bearing CT26 colon carcinoma and LL2 lung cancer were treated with the complex...
May 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28471040/farnesylthiosalicylic-acid-loaded-lipid-polyethylene-glycol-polymer-hybrid-nanoparticles-for-treatment-of-glioblastoma
#13
Abbas Kaffashi, Sevda Lüle, Sibel Bozdağ Pehlivan, Can Sarısözen, İmran Vural, Hüsnü Koşucu, Taner Demir, Kadir Emre Buğdaycı, Figen Söylemezoğlu, Kader Karlı Oğuz, Melike Mut
OBJECTIVES: We aimed to develop lipid-polyethylene glycol (PEG)-polymer hybrid nanoparticles, which have high affinity to tumour tissue with active ingredient, a new generation antineoplastic drug, farnesylthiosalicylic acid (FTA) for treatment of glioblastoma. METHOD: Farnesylthiosalicylic acid-loaded poly(lactic-co-glycolic acid)-1,2 distearoyl-glycerol-3-phospho-ethanolamine-N [methoxy (PEG)-2000] ammonium salt (PLGA-DSPE-PEG) with or without 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP) hybrid nanoparticles has been prepared and evaluated for in-vitro characterization...
May 4, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28448961/supported-binary-liposome-vesicle-gold-nanoparticle-for-enhanced-label-free-dna-and-protein-sensing
#14
Karutha Pandian Divya, 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...
September 15, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28428054/modified-nanoparticle-mediated-il-12-immunogene-therapy-for-colon-cancer
#15
Xiaoxiao Liu, Xiang Gao, Songping Zheng, Bilan Wang, Yanyan Li, Chanjuan Zhao, Yagmur Muftuoglu, Song Chen, Ying Li, Haiyan Yao, Hui Sun, Qing Mao, Chao You, Gang Guo, Yuquan Wei
For the past few years, immunotherapy has recently shown considerable clinical benefit in CRC therapy, and the application of immunologic therapies in cancer treatments continues to increase perennially. Interleukin-12, an ideal candidate for tumor immunotherapy, could activate both innate and adaptive immunities. In this study, we developed a novel gene delivery system with a self-assembly method by MPEG-PLA and DOTAP(DMP) with zeta-potential value of 38.5mV and size of 37.5nm. The supernatant of lymphocytes treated with supernatant from Ct26 transfected pIL12 with DMP could inhibit Ct26 cells growth ex vivo...
April 18, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
https://www.readbyqxmd.com/read/28409629/tuning-the-extent-and-depth-of-penetration-of-flexible-liposomes-in-human-skin
#16
Silvia Franzé, Giulia Donadoni, Alessandro Podestà, Patrizia Procacci, Marica Orioli, Marina Carini, Paola Minghetti, Francesco Cilurzo
In this work we made an attempt to assess the effect of drug-induced changes of flexibility on the penetration of deformable vesicles into the human skin. Eight cationic liposomes with different degrees of flexibility were obtained by entrapping unfractionated heparin, enoxaparin, and nadroparin. The deformability was studied by a novel, facile, and reliable extrusion assay appositely developed and validated by means of quantitative nanoscale mechanical AFM measurements of vesicle elastic modulus (log10(YM))...
April 24, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28398060/x-ray-absorption-spectroscopy-and-spectromicroscopy-of-supported-lipid-bilayers
#17
Jonathan D West, Yujie Zhu, Sokunthearath Saem, Jose Moran-Mirabal, Adam P Hitchcock
The C 1s, O 1s, and N 1s X-ray absorption spectra of three lipid species, 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC), 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC), and 1,2-dioleoyl-3-trimethylammonium-propane (chloride salt) (DOTAP), have been recorded using transmission detection in a scanning transmission X-ray microscope. The spectra are presented on an absolute intensity scale (i.e., optical density per nm) to allow their use as reference standards for spectromicroscopic analysis of supported lipid bilayers...
May 4, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28391065/novel-lipoproteoplex-delivers-keap1-sirna-based-gene-therapy-to-accelerate-diabetic-wound-healing
#18
Piul S Rabbani, Anna Zhou, Zachary M Borab, Joseph A Frezzo, Nikita Srivastava, Haresh T More, William J Rifkin, Joshua A David, Samuel J Berens, Raymond Chen, Sophia Hameedi, Muhammad H Junejo, Camille Kim, Rita A Sartor, Che F Liu, Pierre B Saadeh, Jin K Montclare, Daniel J Ceradini
Therapeutics utilizing siRNA are currently limited by the availability of safe and effective delivery systems. Cutaneous diseases, specifically ones with significant genetic components are ideal candidates for topical siRNA based therapy but the anatomical structure of skin presents a considerable hurdle. Here, we optimized a novel liposome and protein hybrid nanoparticle delivery system for the topical treatment of diabetic wounds with severe oxidative stress. We utilized a cationic lipid nanoparticle (CLN) composed of 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP) and the edge activator sodium cholate (NaChol), in a 6:1 ratio of DOTAP:NaChol (DNC)...
July 2017: Biomaterials
https://www.readbyqxmd.com/read/28376641/a-comprehensive-mathematical-model-of-drug-release-kinetics-from-nano-liposomes-derived-from-optimization-studies-of-cationic-pegylated-liposomal-doxorubicin-formulations-for-drug-gene-delivery
#19
Fateme Haghiralsadat, Ghasem Amoabediny, Marco N Helder, Samira Naderinezhad, Mohammad Hasan Sheikhha, Tymour Forouzanfar, Behrouz Zandieh-Doulabi
This study focuses on the development of a universal mathematical model for drug release kinetics from liposomes to allow in silico prediction of optimal conditions for fine-tuned controlled drug release. As a prelude for combined siRNA-drug delivery, nanoliposome formulations were optimized using various mole percentages of a cationic lipid (1,2-dioleoyl-3-trimethylammonium-propane, DOTAP) in the presence or absence of 3 mol% distearoyl phosphoethanolamine, polyethylene glycol (PEG-2000mDSPE). Outcome parameters were particle size, zeta potential, entrapment efficiency, in vitro drug release, and tumor cell kill efficiency...
April 4, 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28352175/factors-influencing-transfection-efficiency-of-pidua-nanoemulsion-complexes-in-a-mucopolysaccharidosis-type-i-murine-model
#20
Michelle Fraga, Talita Giacomet de Carvalho, Juliana Bidone, Roselena Silvestri Schuh, Ursula Matte, Helder Ferreira Teixeira
Mucopolysaccharidosis type I (MPS I) is an autosomal disease caused by alpha-l-iduronidase (IDUA) deficiency. This study used IDUA knockout mice as a model to evaluate whether parameters such as dose of plasmid and time of treatment could influence the transfection efficiency of complexes formed with PEGylated cationic nanoemulsions and plasmid (pIDUA), which contains the gene that encodes for IDUA. Formulations were composed of medium chain triglycerides, 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine, 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-(amino[polyethylene glycol]-2000), 1,2-dioleoyl-sn-glycero-3-trimethylammonium propane (DOTAP), glycerol, and water and were prepared by the adsorption or encapsulation of preformed pIDUA-DOTAP complexes by high-pressure homogenization...
2017: International Journal of Nanomedicine
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