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Total 141 results found since Jan 2013.

Counterion of Chitosan Influences Thermodynamics of Association of siRNA with a Chitosan-Based siRNA Carrier
ConclusionAssociation of siRNA with our siRNA carrier was influenced by the nature of counterions associated with chitosan. Driven by entropic phenomena including dehydration, interactions were favored by acetate counterion. Although more work would be needed to decipher the influence of the counterion of chitosan during association with siRNA, it was pointed out as a new critical attribute of chitosan to consider while formulating siRNA carrier with this polysaccharide.
Source: Pharmaceutical Research - January 1, 2020 Category: Drugs & Pharmacology Source Type: research

Effect of the combination of cationic lipid and phospholipid on gene-knockdown using siRNA lipoplexes in breast tumor cells and mouse lungs
Mol Med Rep. 2023 Oct;28(4):180. doi: 10.3892/mmr.2023.13067. Epub 2023 Aug 18.ABSTRACTPreviously, using three types of cationic lipids, the effect of phospholipids in liposomal formulations on gene-knockdown efficacy was determined after in vitro and in vivo transfection with small interfering RNA (siRNA)/cationic liposome complexes (siRNA lipoplexes) containing various cationic lipids and phospholipids. In the present study, six other types of cationic lipids, namely N,N-dimethyl-N-tetradecyltetradecan-1-aminium bromide, N-hexadecyl-N,N-dimethylhexadecan-1-aminium bromide (DC-1-16), 2-[bis{2-(tetradecanoyloxy)ethyl}amino...
Source: Molecular Medicine - August 18, 2023 Category: Molecular Biology Authors: Yoshiyuki Hattori Min Tang Aya Aoki Momoka Ezaki Hana Sakai Kei-Ichi Ozaki Source Type: research

A polycation coated liposome as efficient siRNA carrier to overcome multidrug resistance
Publication date: 1 November 2017 Source:Colloids and Surfaces B: Biointerfaces, Volume 159 Author(s): Yuqiong Xia, Xiaofei Wang, He Cheng, Mei Fang, Pengbo Ning, Yulu Zhou, Wei Chen, Hongjin Song Multidrug resistance (MDR) is one of the important factors that impede effective chemotherapy against cancer. Codelivery of MDR1 siRNA (silencing ABCB1 gene) and anticancer drug can greatly inhibit tumor proliferation. Here in this work, we synthesized poly(diallyldimethylammonium chloride) (PDADMAC) coated liposome formula as siMDR1 carrier (AL-PDAD-RNA) and applied it to reverse doxorubicin resistance of OVCAR8/ADR cells. The ...
Source: Colloids and Surfaces B: Biointerfaces - August 19, 2017 Category: Biochemistry Source Type: research

Calcium based siRNA coating: a novel approach for knockdown of HER2 gene in MCF-7 cells using gold nanoparticles.
Authors: Sami A, Naqvi SMS, Qayyum M, Raza Rao A, Sabitaliyevich UY, Ahmad MS Abstract Surface functionalization of nanoparticles (NPs) for therapeutic siRNA delivery into cancer cells has gained interest. The present study was designed for surface functionalization of gold nanoparticles (AuNPs) for efficient siRNA delivery and knockdown in cancer cells. In order to achieve this objective, AuNPs were coated with HER2-siRNA in the presence of 11-mercaptoundecanoic acid (11-MUA), calcium chloride (CaCl2) and polyethyleneimine (PEI) in alternate charge bearing successive layers. MCF-7 cells were cultured and transfect...
Source: Cellular and Molecular Biology - October 14, 2020 Category: Molecular Biology Tags: Cell Mol Biol (Noisy-le-grand) Source Type: research

siRNA@superparamagnetic iron oxide nanoparticles attenuate physiological toxicity of DEHP by suppressing autophagy pathway activities in Caenorhabditis elegans
Ecotoxicol Environ Saf. 2021 Dec 13;229:113083. doi: 10.1016/j.ecoenv.2021.113083. Online ahead of print.ABSTRACTBis(2-ethylhexyl)ortho-phthalate (DEHP) is a widely used plasticizer in polyvinyl chloride materials. Considering its widespread application, it has become a major environmental pollutant and can cause endocrine, reproductive system, and gastrointestinal disorders. Herein we aimed to elucidate the mechanisms via which DEHP causes cytotoxicity in Caenorhabditis elegans and assess whether siRNA@superparamagnetic iron oxide nanoparticles (SPIONs) can attenuate this effect. On exposing C. elegans to 10 μM DEHP, its...
Source: Ecotoxicology and Environmental Safety - December 16, 2021 Category: Environmental Health Authors: Yongyi Huang Xiling Du Te Liu Qiang Liu Source Type: research

TonEBP Suppresses the HO-1 Gene by Blocking Recruitment of Nrf2 to Its Promoter
Discussion Dynamic changes in the functional phenotype of macrophages are associated with pathogenesis of inflammatory diseases (5–7). TonEBP primes macrophages toward an M1 phenotype, which has pro-inflammatory properties. TonEBP does this by promoting expression of pro-inflammatory genes via interaction with NF-κB (36) and by binding directly to the promoter (37, 64). In addition, TonEBP suppresses expression of the anti-inflammatory cytokine IL-10 by limiting chromatin access to the promoter (37). The pro-inflammatory function of TonEBP suggests that inhibiting its expression or activation could suppres...
Source: Frontiers in Immunology - April 17, 2019 Category: Allergy & Immunology Source Type: research

Regulation of Chromatin Assembly and Cell Transformation by Formaldehyde Exposure in Human Cells
Conclusions: We propose that the inhibition of chromatin assembly represents a novel mechanism of cell transformation induced by the environmental and occupational chemical carcinogen FA. https://doi.org/10.1289/EHP1275 Received: 25 October 2016 Revised: 19 May 2017 Accepted: 23 May 2017 Published: 21 September 2017 Address correspondence to C. Jin, Dept. of Environmental Medicine, New York University School of Medicine, 57 Old Forge Rd., Tuxedo Park, NY 10987 USA. Telephone: (845) 731-3602. Email: Chunyuan.jin@nyumc.org *Current affiliation: Medical School of Nanjing University, Nanjing, China. †Current affiliatio...
Source: EHP Research - September 21, 2017 Category: Environmental Health Authors: Daniil Lyalko Tags: Research Source Type: research

Therapeutic potential of topical administration of siRNAs against HIF-1 α for corneal neovascularization
In conclusion, the topical application of siRNA towards HIF-1α seems to be an effective and reliable method to stop neovascularization.PMID:35367249 | DOI:10.1016/j.exer.2022.109036
Source: Cell Research - April 3, 2022 Category: Cytology Authors: Assumpta Peral Jes ús Mateo Carmen O Dom ínguez-Godínez Gonzalo Carracedo Jose Antonio G ómez Almudena Crooke Jes ús Pintor Source Type: research