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https://www.readbyqxmd.com/read/29777906/reduced-rar-%C3%AE-gene-expression-in-benzo-a-pyrene-induced-lung-cancer-mice-is-upregulated-by-dotap-lipo-atra-treatment
#1
S Viswanathan, V M Berlin Grace
Molecular targeted therapy for specific genes is an emerging research. Retinoic Acid Receptor (RAR-β) is a key tumor suppressor which is found to be lost drastically during much cancer progression. We hence, analyzed the expression level of RAR-β gene during B(a)P induced lung cancer development in mice and studied the lung cancer targeted action of All Trans Retinoic Acid (ATRA) in DOTAP liposomal formulation. The effect of its treatment on lung cancer was determined by histopathological analysis. RAR-β gene expression was assessed by RT-PCR and qPCR...
May 16, 2018: Gene
https://www.readbyqxmd.com/read/29767944/theranostic-niosomes-for-efficient-sirna-microrna-delivery-and-activatable-near-infrared-fluorescent-tracking-of-stem-cells
#2
Chuanxu Yang, Shan Gao, Ping Song, Frederik Dagnaes-Hansen, Maria Jakobsen, Jørgen Kjems
RNA interference (RNAi) mediated gene regulation in stem cells offers great potential in regenerative medicine. In this study, we developed a theranostic platform for efficient delivery of small RNAs (siRNA/miRNA) to human mesenchymal stem cells (hMSCs) to promote differentiation, and meanwhile, to specifically label the transfected cells for in vivo tracking purpose. We encapsulated indocyanine green (ICG) in a nonionic surfactant vesicle, termed "niosome", that is mainly composed of a nonionic surfactant sorbitan monooleate (Span 80) and a cationic lipid 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP)...
May 16, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29767242/in-vivo-antitumor-activity-of-liposome%C3%A2-plasmid-dna-encoding-mutant-survivin%C3%A2-t34a-in-cervical-cancer
#3
Fang Qiu, Xia Zhao
The aim of the present study was to investigate the influence of liposome‑plasmid encoding mutant survivin‑T34A (PST34A) on tumor growth in cervical cancer in vivo. Liposome‑plasmid DNA encoding mutant survivin‑T34A was constructed and administered via an intraperitoneal injection in mice inoculated with cervical cancer cells. Following the establishment of the tumor model, the animals were randomly divided into four groups: i) The normal saline group (NS; 100 µl sterile saline once/3 days for 15 days); ii) the 1,2‑dioleoyl‑3‑trimethylammonium‑propane (DOTAP) control (100 µg DOTAP once/3 days for 15 days); iii) the plasmid PST34A (10 µg PST34A once/3 days for 15 days); and iv) the PST34A+DOTAP (10 µg PST34A+100 µg DOTAP once/3 days for 15 days)...
May 11, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29705103/an-epr-spin-probe-study-of-the-interactions-between-pc-liposomes-and-stratum-corneum-membranes
#4
Sebastião Antonio Mendanha, Jorge Luiz Veira Dos Anjos, Lorena Maione-Silva, Halanna Cristina B Silva, Eliana Martins Lima, Antonio Alonso
The electron paramagnetic resonance (EPR) spin labeling methodology was used to analyze the interactions of phosphatidylcholine (PC) liposomal formulations that are commonly used as transepidermal drug delivery systems with stratum corneum (SC) membranes. The lipid dynamics of five liposome formulations were evaluated to study the influences of sorbitan monooleate (Span80), cholesterol, and cholesterol with the charged lipids 2-dioleoyl-3-trimethylammonium-propane (DOTAP) and 1,2-distearoyl-sn-glycero-3-phospho-(1'-rac-glycerol) (DSPG) on the molecular dynamics of PC vesicles...
April 26, 2018: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29695068/cationic-liposomes-carrying-sirna-impact-of-lipid-composition-on-physicochemical-properties-cytotoxicity-and-endosomal-escape
#5
Anna Lechanteur, Vincent Sanna, Amandine Duchemin, Brigitte Evrard, Denis Mottet, Géraldine Piel
In recent year, cationic liposomes have gained a lot of attention for siRNA delivery. Despite this, intracellular barriers as endosomal escape and cytosolic delivery of siRNA still represent a challeng, as well as the cytotoxicity due to cationic lipids. To address these issues, we developed four liposomal formulations, composed of two different cationic lipids (DOTAP and DC-Cholesterol) and different ratio of co-lipids (cholesterol and DOPE). The objective is to dissect these impacts on siRNA efficacy and cytotoxicity...
April 24, 2018: Nanomaterials
https://www.readbyqxmd.com/read/29679798/liposomal-formulations-of-magnesium-sulfanyl-tribenzoporphyrazines-for-the-photodynamic-therapy-of-cancer
#6
Jaroslaw Piskorz, Dariusz T Mlynarczyk, Wojciech Szczolko, Krystyna Konopka, Nejat Düzgüneş, Jadwiga Mielcarek
Photodynamic therapy of cancer comprises the activation of photosensitizer molecules delivered to cancer cells, to generate reactive oxygen species that mediate cytotoxicity. In this study, previously synthesized dendritic magnesium tribenzoporphyrazines were incorporated into four types of liposomes containing either 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) or 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine (DOPE) as the zwitterionic lipids. The addition of either l-α-phosphatidyl-dl-glycerol (PG) or 1,2-dioleoyl-3-trimethylammoniumpropane (DOTAP) imparted a negative or positive charge, respectively...
April 9, 2018: Journal of Inorganic Biochemistry
https://www.readbyqxmd.com/read/29593949/a-vesicular-stomatitis-virus-inspired-dna-nanocomplex-for-ovarian-cancer-therapy
#7
Wei Zhao, Yuping Yang, Lingling Song, Tianyi Kang, Ting Du, Yujiao Wu, Meimei Xiong, Li Luo, Jianlin Long, Ke Men, Lan Zhang, Xiaoxin Chen, Meijuan Huang, Maling Gou
Gene therapy provides a novel method for cancer therapy. This study shows a DNA nanocomplex that is inspired from vesicular stomatitis virus (VSV) for ovarian cancer therapy. This DNA nanocomplex consists of a cationized monomethoxy poly (ethylene glycol)-poly (d,l-lactide) (MPEG-PLA) nanoparticle and a plasmid encoding the matrix protein of vesicular stomatitis virus (VSVMP) that plays a critical role in the VSV-induced apoptosis of cancer cells. The cationized MPEG-PLA nanoparticle that is self-assembled by MPEG-PLA copolymer and N -[1-(2,3-dioleoyloxy) propyl]- N,N,N -trimethylammonium chloride (DOTAP) has low cytotoxicity and high transfection efficiency (>80%)...
March 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/29578859/inhibition-of-bmp4-and-alpha-smooth-muscle-actin-expression-in-lx-2-hepatic-stellate-cells-by-bmp4-sirna-lipid-based-nanoparticle
#8
Refaat Omar, Jiaqi Yang, Samaa Alrushaid, Frank J Burczynski, Gerald Y Minuk, Yuewen Gong
PURPOSE: To develop and characterize vitamin A (VA)-coupled liposomes for the targeted delivery of BMP4-siRNA to hepatic stellate cells (HSC). VA was selected to increase the uptake by HSC based on their function in the storage of VA. METHODS: DOTAP/DOPE liposomes were prepared by film hydration method and their surfaces were decorated with VA. The cytotoxicity of VA-conjugated liposomes was evaluated by the WST-1 assay. Inhibition of BMP4 and α-SMA was determined by PCR and ELISA...
2018: Journal of Pharmacy & Pharmaceutical Sciences: a Publication of the Canadian Society for Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29571289/paclitaxel-and-curcumin-coadministration-in-novel-cationic-pegylated-niosomal-formulations-exhibit-enhanced-synergistic-antitumor-efficacy
#9
Ashraf Alemi, Javad Zavar Reza, Fateme Haghiralsadat, Hossein Zarei Jaliani, Mojtaba Haghi Karamallah, Seyed Ahmad Hosseini, Somayeh Haghi Karamallah
BACKGROUND: The systemic administration of cytotoxic chemotherapeutic agents for cancer treatment often has toxic side effects, limiting the usage dose. To increase chemotherapeutic efficacy while reducing toxic effects, a rational design for synergy-based drug regimens is essential. This study investigated the augmentation of therapeutic effectiveness with the co-administration of paclitaxel (PTX; an effective chemotherapeutic drug for breast cancer) and curcumin (CUR; a chemosensitizer) in an MCF-7 cell line...
March 23, 2018: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/29494955/viral-vector-mimicking-and-nucleus-targeted-nanoparticles-based-on-dexamethasone-polyethylenimine-nanoliposomes-preparation-and-evaluation-of-transfection-efficiency
#10
Bizhan Malaekeh-Nikouei, Leila Gholami, Fariba Asghari, Saeedeh Askarian, Saeedeh Barzegar, Mehdi Rezaee, Reza Kazemi Oskuee
Non-viral vectors such as polymers and liposomes have been used as gene delivery systems to overcome intrinsic problems of viral vectors, but transfection efficiency of these vectors is lower than viral vectors. In the present study, we tried to design non-viral gene delivery vectors that mimic the viral vectors using the benefits of both cationic liposomes and cationic polymer vectors along with targeting glucocorticoid receptors to enhance cellular trafficking of vectors. Cationic liposomes containing DOTAP and cholesterol were prepared by thin-film hydration following extrusion method...
May 1, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29491403/electrochemical-sensor-for-detection-of-mirs-based-on-the-differential-effect-of-competitive-structures-in-the-p19-function
#11
E Ghazizadeh, R K Oskuee, M R Jaafari, S Hosseinkhani
The present study aim to design a liposomal electrochemical sensor using 1, 2-dioleoyl-3-trimethylammoniumpropane (DOTAP) and dioleoylphosphatidylethanolamine(DOPE), chimeric probes and p19, it has been considered as a caliper molecule as well. Also the competitor structural hybrid (RNA) was used to detect three types of miRs in one screen printed electrode modified by gold nanoparticle (SCPE/GNP). In this purpose, the sensor signal stabilized when the cationic DOTAP-DOPE with hybrids of the chimeric probes (Stem, M-linear) sandwiched in order to detect 221-124a miRs...
February 28, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29486430/non-lamellar-lyotropic-liquid-crystalline-nanoparticles-enhance-the-antibacterial-effects-of-rifampicin-against-staphylococcus-aureus
#12
Nhiem Tran, Marion Hocquet, Blandine Eon, Parveen Sangwan, Julian Ratcliffe, Tracey M Hinton, Jacinta White, Berkay Ozcelik, Nicholas P Reynolds, Benjamin W Muir
The fight against infection in an era of emerging antibiotic resistant bacteria is one of the grandest scientific challenges facing society today. Nano-carriers show great promise in improving the antibacterial activity of antibiotics as they are able to enhance their solubility, provide sustained release and reduce toxic side effects via specifically targeting infection sites. Here, we investigate the antibacterial effect of two lipidic nano-carriers that contain the poorly soluble antibiotic rifampicin in their bilayers...
June 1, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29473725/lipid-shell-enveloped-polymeric-nanoparticles-with-high-integrity-of-lipid-shells-improve-mucus-penetration-and-interaction-with-cystic-fibrosis-related-bacterial-biofilms
#13
Feng Wan, Tommy Nylander, Sylvia Natalie Klodzinska, Camilla Foged, Mingshi Yang, Stefania G Baldursdottir, Hanne M Nielsen
Nanoparticle (NP) mediated drug delivery into viscous biomatrices, e.g., mucus and bacterial biofilms, is challenging. Lipid shell-enveloped polymeric NPs (Lipid@NPs), composed of a polymeric NP core coated with a lipid shell, represent a promising alternative to the current delivery systems. Here, we describe the facile methods to prepare Lipid@NPs with high integrity of lipid shells and demonstrate the potential of Lipid@NPs in an effective mucus penetration and interaction with cystic fibrosis-related bacterial biofilms...
April 4, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29461548/direct-measurement-of-surface-charge-distribution-in-phase-separating-supported-lipid-bilayers
#14
Thomas Fuhs, Lasse Hyldgaard Klausen, Steffan Møller Sønderskov, Xiaojun Han, Mingdong Dong
The local surface charge density of the cell membrane influences regulation and localization of membrane proteins. The local surface charge density could, until recently, not be measured directly under physiological conditions, and it was largely a hypothetical yet very important parameter. Here we use unsaturated lipids of a distinct charge (DOTAP, DOPC, and DOPG) and a neutral fully saturated lipid (DPPC) to create model membranes with phase separating domains of a defined charge. We then apply quantitative surface charge microscopy (QSCM) to investigate the local surface charge density; this is a technique based on a scanning ion conductance microscope (SICM) capable of measuring surface charge density with nanoscale lateral resolution...
March 1, 2018: Nanoscale
https://www.readbyqxmd.com/read/29447484/cationic-dda-tdb-liposome-as-a-mucosal-vaccine-adjuvant-for-uptake-by-dendritic-cells-in-vitro-induces-potent-humoural-immunity
#15
Wenjing Qu, Na Li, Rui Yu, Wenbao Zuo, Tingting Fu, Wenling Fei, Yanhui Hou, Yanhua Liu, Jianhong Yang
The cationic dimethyldioctadecylammonium/trehalose 6,6,9-dibehenate (DDA/TDB) liposome is as a strong adjuvant system for vaccines, with remarkable immunostimulatory activity. The mucosal administration of vaccines is a potential strategy for inducing earlier and stronger mucosal immune responses to infectious diseases. In this study, we assessed whether the intranasal administration of cationic DDA/TDB liposomes combined with influenza antigen A (H3N2) can be used as a highly efficacious vaccine to induce mucosal and systemic antibody responses...
February 15, 2018: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/29433310/quantifying-the-average-number-of-nucleic-acid-therapeutics-per-nanocarrier-by-single-particle-tracking-microscopy
#16
Elisa Zagato, Lotte Vermeulen, Heleen Dewitte, Griet Van Imschoot, Roosmarijn E Vandenbroucke, Jo Demeester, Stefaan C De Smedt, Kristiaan Neyts, Katrien Remaut, Kevin Braeckmans
Nucleic acid biopharmaceuticals are being investigated as potential therapeutics. They need to be incorporated into a biocompatible carrier so as to overcome several biological barriers. Rational development of suitable nanocarriers requires high-quality characterization techniques. While size, concentration, and stability can be very well measured these days, even in complex biological fluids, a method to accurately quantify the number of nucleic acid therapeutics encapsulated in nanocarriers is still missing...
March 5, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29376449/folate-receptor-targeted-lipid-albumin-nanoparticles-f-lan-for-therapeutic-delivery-of-an-akt1-antisense-oligonucleotide
#17
Hong Li, Yang Liu, Lihua Chen, Qibing Liu, Shanshan Qi, Xinwei Cheng, Young B Lee, Chang-Ho Ahn, Deog Joong Kim, Robert J Lee
BACKGROUND: RX-0201 is an antisense oligonucleotide (ASO) against Akt1 currently in clinical trial for metastatic renal cancer. PURPOSE: To improve the delivery of RX-0201 using folate receptor-targeted lipid-albumin nanoparticles (F-LAN). METHODS: F-LAN were synthesized with the composition of DOTAP/soyPC/TPGS/folate-PEG-DSPE (25:70:4:1 m/m), a cationic human serum albumin-pentaethylenehexamine (HSA-PEHA) conjugate and RX-0201. The nanoparticles were evaluated in KB human carcinoma cells in vitro and in a KB murine xenograft tumour model in vivo for pharmacokinetics and antitumor activities...
June 2018: Journal of Drug Targeting
https://www.readbyqxmd.com/read/29321490/the-interaction-between-bsa-and-dotap-at-the-air-buffer-interface
#18
Guoqing Xu, Changchun Hao, Lei Zhang, Runguang Sun
In this article, the interaction between bovine serum albumin (BSA) and the cationic 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP) at the air-buffer interface was investigated at different subphase's pH values (pH = 3, 5 and 10). Surface pressure measurements (π - A) and penetration kinetics process (π - t) were carried out to reveal the interaction mechanism and the dynamical behavior. The data showed that π - A isotherms moved towards larger mean molecular area when the concentration of BSA ([BSA]) increased, the amount of BSA adsorbed onto DOTAP monolayer reached a threshold value at a [BSA] of 5 × 10-8 M, and BSA desorbed from the lipid monolayer as time goes by...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29317110/cationic-liposomes-formulated-with-a-novel-whole-leishmania-lysate-wll-as-a-vaccine-for-leishmaniasis-in-murine-model
#19
Iman Jafari, Vahid Heravi Shargh, Maryam Shahryari, Azam Abbasi, Mahmoud Reza Jaafari, Ali Khamesipour, Ali Badiee
Although there have been numerous attempts to develop a successful vaccine against leishmaniasis, based on the clinical trial in this field, no vaccine against Leishmania in routine way can be found for globally effective vaccination in human. Amongst, first generation vaccines consisting of parasite fractions or whole killed Leishmania showed more successful results in clinical trials. It seems that the main reason for the low efficacy of these vaccines is lack of a suitable adjuvant. In this study, a crude extract of detergent-solubilized L...
June 2018: Immunobiology
https://www.readbyqxmd.com/read/29305141/dequalinium-based-functional-nanosomes-show-increased-mitochondria-targeting-and-anticancer-effect
#20
Yoonhee Bae, Min Kyo Jung, Seulgi Lee, Su Jeong Song, Ji Young Mun, Eric S Green, Jin Han, Kyung Soo Ko, Joon Sig Choi
Mitochondria are targets with great potential for therapeutics for many human disorders. However, drug delivery systems for such therapeutics remain in need of more efficient mitochondrial-targeting carriers. In this study, we report that nanosomes composed of Dequalinium/DOTAP (1,2-dioleoyl-3-trimethylammonium-propane)/DOPE (1,2-dioleoyl-sn-glycero-3-phosphoethanolamine), called DQA80s, can act in the dual role of mitochondrial-targeting carrier and anticancer agent for therapeutic interventions against mitochondrial diseases...
March 2018: European Journal of Pharmaceutics and Biopharmaceutics
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