Query: siRNA

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Total 13814 results found since Jan 2013.

A new combination therapy for asthma using dual-function dexamethasone-conjugated polyethylenimine and vitamin D binding protein siRNA
T Rhim
Source: Gene Therapy - September 21, 2017 Category: Genetics & Stem Cells Authors: M Choi J Gu M Lee T Rhim Source Type: research

Control of cancer stem cell like population by intracellular target identification followed by the treatment with peptide-siRNA complex.
Abstract Cancer stem cells (CSCs) are a subpopulation of cancer cells and have been known to create cancer reoccurrence during cancer therapy due to their stem cell-like characteristics. However, exact target to control the CSC has not been fully established. Here, we enriched CD44(High) population of MDA-MB-231 cells by CD44 antibody as a CSC marker. By Phospho Antibody Array, CD44(High) population of MDA-MB-231 cells reveals Feline sarcoma-related tyrosine kinase (FER) protein was highly activated. When FER siRNA and low molecular weight protamine (LMWP) as cell penetrating peptides are applied to this populat...
Source: Biochemical and Biophysical Research communications - September 14, 2017 Category: Biochemistry Authors: Suh JS, Lee HJ, Nam H, Jo BS, Lee DW, Kim JH, Lee JY, Chung CP, Lee G, Park YJ Tags: Biochem Biophys Res Commun Source Type: research

Systemic siRNA Delivery with a Dual pH-Responsive and Tumor-targeted Nanovector for Inhibiting Tumor Growth and Spontaneous Metastasis in Orthotopic Murine Model of Breast Carcinoma
Phenylboronic acid (PBA)-mediated tumor targeting nanovector is an attractive strategy for enhancing siRNA delivery and treatment of metastatic cancers. However, its nonspecific binding with various biological membranes containing cis-diol moieties restricts its potential application by systematic administration. Herein, we constructed a novel pH-activated “sheddable” PEG-coated nanoparticle for effective treatment of primary tumors and metastases, which was based on the conjugation of catechol group modified poly(ethylene glycol) (PEG-Cat) and PBA-terminated polyethylenimine (PEI-PBA) via the borate ester form...
Source: Theranostics - September 12, 2017 Category: Molecular Biology Authors: Bo Fan, Lin Kang, Liqing Chen, Ping Sun, Mingji Jin, Qiming Wang, You Han Bae, Wei Huang, Zhonggao Gao Tags: Research Paper Source Type: research

Regulation on Toll-like Receptor 4 and Cell Barrier Function by Rab26 siRNA-loaded DNA Nanovector in Pulmonary Microvascular Endothelial Cells
In this study, we thoroughly investigated the role and novel mechanism of Rab26 in permeability and apoptosis of HPMVECs using a self-assembled Rab26 siRNA loaded DNA Y-motif nanoparticle (siRab26-DYM) and Rab26 adenovirus. We found that siRab26-DYM could be efficiently transfected into HPMVECs in a time- and dose-dependent manner. Importantly, the siRab26-DYM nanovector markedly aggravated the LPS-induced apoptosis and hyper-permeability of HPMVECs by promoting the nuclear translocation of Foxo1, and subsequent activation of Toll-like receptor 4 (TLR4) signal pathway. Overexpression of Rab26 by Rab26 adenoviruses partiall...
Source: Theranostics - September 12, 2017 Category: Molecular Biology Authors: Hongli Li, Binfeng He, Xueping Liu, Jingtong Li, Qian Liu, Weijie Dong, Zhi Xu, Guisheng Qian, Hua Zuo, Changhua Hu, Hang Qian, Chengde Mao, Guansong Wang Tags: Research Paper Source Type: research

High-Yield Synthesis of Monomeric LMWP(CPP)-siRNA Covalent Conjugate for Effective Cytosolic Delivery of siRNA
Because of the unparalleled efficiency and universal utility in treating a variety of disease types, siRNA agents have evolved as the future drug-of-choice. Yet, the inability of the polyanionic siRNA macromolecules to cross the cell membrane remains as the bottleneck of possible clinical applications. With the cell penetrating peptides (CPP) being discovered lately, the most effective tactic to achieve the highest intracellular siRNA delivery deems to be by covalently conjugating the drug to a CPP; for instance, the arginine-rich Tat or low molecular weight protamine (LMWP) peptides. However, construction of such a chemic...
Source: Theranostics - September 12, 2017 Category: Molecular Biology Authors: Junxiao Ye, Ergang Liu, Junbo Gong, Jianxin Wang, Yongzhuo Huang, Huining He, Victor C. Yang Tags: Research Paper Source Type: research

Surface De-PEGylation Controls Nanoparticle-Mediated siRNA Delivery In Vitro and In Vivo
The present work proposes a unique de-PEGylation strategy for controllable delivery of small interfering RNA (siRNA) using a robust lipid-polymer hybrid nanoparticle (NP) platform. The self-assembled hybrid NPs are composed of a lipid-poly(ethylene glycol) (lipid-PEG) shell and a polymer/cationic lipid solid core, wherein the lipid-PEG molecules can gradually dissociate from NP surface in the presence of serum albumin. The de-PEGylation kinetics of a series of different lipid-PEGs is measured with their respective NPs, and the NP performance is comprehensively investigated in vitro and in vivo. This systematic study reveal...
Source: Theranostics - September 12, 2017 Category: Molecular Biology Authors: Xi Zhu, Wei Tao, Danny Liu, Jun Wu, Zilei Guo, Xiaoyuan Ji, Zameer Bharwani, Lili Zhao, Xiaoping Zhao, Omid C. Farokhzad, Jinjun Shi Tags: Research Paper Source Type: research

The pH-Triggered Triblock Nanocarrier Enabled Highly Efficient siRNA Delivery for Cancer Therapy
Small interfering RNA (siRNA) therapies have been hampered by lack of delivery systems in the past decades. Nowadays, a few promising vehicles for siRNA delivery have been developed and it is gradually revealed that enhancing siRNA release from endosomes into cytosol is a very important factor for successful delivery. Here, we designed a novel pH-sensitive nanomicelle, PEG-PTTMA-P(GMA-S-DMA) (PTMS), for siRNA delivery. Owing to rapid hydrolysis in acidic environment, PTMS NPs underwent hydrophobic-to-hydrophilic transition in endosomes that enabled combination of proton sponge effect and raised osmotic pressure in endosome...
Source: Theranostics - September 12, 2017 Category: Molecular Biology Authors: Lili Du, Junhui Zhou, Lingwei Meng, Xiaoxia Wang, Changrong Wang, Yuanyu Huang, Shuquan Zheng, Liandong Deng, Huiqing Cao, Zicai Liang, Anjie Dong, Qiang Cheng Tags: Research Paper Source Type: research

Dissipative Particle Dynamic Simulation on the Assembly and Release of siRNA/Polymer/Gold Nanoparticles Based Polyplex
This article is protected by copyright. All rights reserved.
Source: AIChE Journal - September 11, 2017 Category: Science Authors: Xiaona Xie, Shouping Xu, Pihui Pi, Jiang Cheng, Xiufang Wen, Xuan Liu, Shengnian Wang Tags: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Source Type: research

siRNA-Mediated RNA Interference in Precision-Cut Tissue Slices Prepared from Mouse Lung and Kidney
In conclusion, thisex vivo transfection model can be used to evaluate the effects of siRNA in relevant biological environments.
Source: The AAPS Journal - September 11, 2017 Category: Drugs & Pharmacology Source Type: research

Folate appended cyclodextrins for drug, DNA, and siRNA delivery.
Abstract Drug, DNA, and siRNA delivery systems based on cyclodextrin (CD) core and connected with folate (FA) via various linkers are presented. They include simple mono-derivatized cyclodextrins as well as cyclodextrins with higher degree of substitution, both in their primary and secondary sides. Examples of simple polymers and dendrimers are also discussed. Such carriers possess properties inherent to both of their components. Cyclodextrin provides the ability to encapsulate organic molecules in its inner cavity, thus improving their solubility in water, bioavailability, and stability, while FA assures targetin...
Source: European Journal of Pharmaceutics and Biopharmaceutics - September 9, 2017 Category: Drugs & Pharmacology Authors: Ceborska M Tags: Eur J Pharm Biopharm Source Type: research

Development of a Peptide-Modified siRNA Nanocomplex for Hepatic Stellate Cells
Publication date: Available online 7 September 2017 Source:Nanomedicine: Nanotechnology, Biology and Medicine Author(s): Zhen Zhao, Yuanke Li, Akshay Jain, Zhijin Chen, Hao Liu, Wei Jin, Kun Cheng Insulin-like growth factor 2 receptor (IGF2R) is overexpressed in activated Hepatic stellate cells (HSCs) and therefore can be utilized for HSC-specific drug delivery. We recently discovered an IGF2R-specific peptide using a novel biopanning. Here, we adopted biotin-conjugated IGF2R-specific peptide, cholesterol, and vitamin A as the targeting ligands for the neutravidin-based siRNA nanocomplex to deliver PCBP2 siRNA, a potentia...
Source: Nanomedicine: Nanotechnology, Biology and Medicine - September 8, 2017 Category: Nanotechnology Source Type: research

Inhaled powder formulation of naked siRNA using spray drying technology with l-leucine as dispersion enhancer
In this study, siRNA was co-spray dried with mannitol and l-leucine, the latter being a dispersion enhancer. To the best of our knowledge, this is the first time that siRNA in its naked form was formulated into an inhalable dry powder using spray drying technology. The aerosol performance of the powder was evaluated by Next Generation Impactor (NGI). The presence of l-leucine in the formulation could improve the aerosolization of siRNA-containing powders. Results from the X-ray photoelectron spectroscopy (XPS) suggested that l-leucine was enriched on the particle surface and promote powder dispersion. Among the different s...
Source: International Journal of Pharmaceutics - September 6, 2017 Category: Drugs & Pharmacology Source Type: research

Aquaporin-4 Blockage by siRNA Protects Rat Articular Chondrocytes from IL-1 β-induced Apoptosis by Inhibiting p38 MAPK Signal Pathway.
Aquaporin-4 Blockage by siRNA Protects Rat Articular Chondrocytes from IL-1β-induced Apoptosis by Inhibiting p38 MAPK Signal Pathway. Ann Clin Lab Sci. 2017 Sep;47(5):563-571 Authors: Cai L, Lei C, Li R, Chen WN, Li CM Abstract Accumulating evidence reveals that articular chondrocytes undergo increased apoptosis in rheumatoid arthritis (RA) and inhibiting chondrocyte apoptosis might be a promising therapeutic strategy. We recently found that aquaporin-4 (AQP4) protein level in the cartilage of rats with adjuvant-induced arthritis was higher than normal rats. Herein, cultured rat articular chondrocyte...
Source: Annals of Clinical and Laboratory Science - September 1, 2017 Category: Laboratory Medicine Authors: Cai L, Lei C, Li R, Chen WN, Li CM Tags: Ann Clin Lab Sci Source Type: research

Co ‐delivery of HIF‐1α siRNA and 5‐fluorouracil to overcome drug resistance in gastric cancer SGC‐7901 cells
ConclusionsCo‐delivery of siRNA and 5‐fluorouracil chitosan nanoparticles is an attractive strategy to overcome multidrug resistance.
Source: The Journal of Gene Medicine - September 1, 2017 Category: Genetics & Stem Cells Authors: Yunna Chen, Li Sun, Dongdong Guo, Ziteng Wu, Weidong Chen Tags: RESEARCH ARTICLE Source Type: research

Leptin siRNA promotes ovarian granulosa cell apoptosis and affects steroidogenesis by increasing NPY2 receptor expression.
In conclusion, knockdown of leptin significantly affected ovarian steroidogenesis and ovarian function through NPY. siLeptin transfection impaired the activation of JAK2/STAT3 and contributed to ovarian granulosa cell apoptosis partially through up-regulating NPY2R expression. PMID: 28864114 [PubMed - as supplied by publisher]
Source: Gene - August 29, 2017 Category: Genetics & Stem Cells Authors: Ding X, Kou X, Zhang Y, Zhang X, Cheng G, Jia T Tags: Gene Source Type: research

Theranostic poly(lactic-co-glycolic acid) nanoparticle for magnetic resonance/infrared fluorescence bimodal imaging and efficient siRNA delivery to macrophages and its evaluation in a kidney injury model
Publication date: Available online 24 August 2017 Source:Nanomedicine: Nanotechnology, Biology and Medicine Author(s): Chuanxu Yang, Hieu Vu-Quang, Dina Michelle Unnerup Husum, Stine Julie Tingskov, Mads Sloth Vinding, Thomas Nielsen, Ping Song, Niels Chr. Nielsen, Rikke Nørregaard, Jørgen Kjems In this work, a theranostic nanoparticle was developed for multimodal imaging and siRNA delivery. The core of the nanoparticles (NP) was formed by encapsulation of superparamagnetic iron oxides and indocyanine green in a PLGA matrix to serve as a multimodal probe for near-infrared (NIFR) and magnetic resonance (MR) imaging. The ...
Source: Nanomedicine: Nanotechnology, Biology and Medicine - August 24, 2017 Category: Nanotechnology Source Type: research

Enhancement or inhibition of PLC γ2 expression in rat hepatocytes by recombinant adenoviral vectors that contain full-length gene or siRNA.
Enhancement or inhibition of PLCγ2 expression in rat hepatocytes by recombinant adenoviral vectors that contain full-length gene or siRNA. Biotech Histochem. 2017 Aug 24;:1-9 Authors: Chen XG, Liu YM, Lv QX, Ma J Abstract We investigated the effects of recombinant adenovirus vectors that overexpress or silence PLCγ2 on the expression of this gene during hepatocyte proliferation. Hepatocytes were isolated, identified by immunofluorescent cytochemical staining and infected by previously constructed Ad-PLCγ2 and Ad-PLCγ2 siRNA1, siRNA2 and siRNA3. Green fluorescent protein (GFP) expression was observ...
Source: Biotechnic and Histochemistry - August 24, 2017 Category: Research Authors: Chen XG, Liu YM, Lv QX, Ma J Tags: Biotech Histochem Source Type: research

Molecular Mechanisms and Biological Functions of siRNA.
Authors: Dana H, Chalbatani GM, Mahmoodzadeh H, Karimloo R, Rezaiean O, Moradzadeh A, Mehmandoost N, Moazzen F, Mazraeh A, Marmari V, Ebrahimi M, Rashno MM, Abadi SJ, Gharagouzlo E Abstract One of the most important advances in biology has been the discovery that siRNA (small interfering RNA) is able to regulate the expression of genes, by a phenomenon known as RNAi (RNA interference). The discovery of RNAi, first in plants and Caenorhabditis elegans and later in mammalian cells, led to the emergence of a transformative view in biomedical research. siRNA has gained attention as a potential therapeutic reagent due t...
Source: International Journal of Biomedical Science - August 23, 2017 Category: Biomedical Science Tags: Int J Biomed Sci Source Type: research

Effect of HPV E6/E7 siRNA with Chemotherapeutic Agents on the Regulation of TP53/E2F Dynamic Behavior for Cell Fate Decisions.
Abstract Toxicity and resistance remain major challenges for advanced or recurrent cervical cancer therapies, as treatment requires high doses of chemotherapeutic agents. Restoration of TP53 and hypophosphorylated-retinoblastoma (pRB) proteins by human papillomavirus (HPV) E6/E7 siRNA sensitizes HPV-positive cervical cancer cells toward chemotherapeutic agents. Here, we investigated the therapeutic effects of E6/E7 siRNA on the dynamic behavior of TP53 and RB/E2F signaling networks in deciding the cell fate. The synergistic effect of HPV E6/E7 siRNA pool (SP) with chemotherapeutic agents on TP53 and RB/E2F signali...
Source: Neoplasia - August 23, 2017 Category: Cancer & Oncology Authors: Rajasekaran N, Jung HS, Bae SH, Chelakkot C, Hong S, Choi JS, Yim DS, Oh YK, Choi YL, Shin YK Tags: Neoplasia Source Type: research

Polymeric nanoparticles of siRNA prepared by a double-emulsion solvent-diffusion technique: Physicochemical properties, toxicity, biodistribution and efficacy in a mammary carcinoma mice model.
Abstract siRNA-loaded nanoparticles (NPs) administered systemically can overcome the poor stability and rapid elimination of free double-stranded RNA in circulation, resulting in increased tumor accumulation and efficacy. siRNA against osteopontin (siOPN), a protein involved in breast cancer development, was encapsulated in poly(D,L-lactic-co-glycolic acid) NPs by a double emulsion solvent diffusion (DESD) technique. We also compared the effect of polyethylenimine (PEI) molecular weight (800 Da and 25 kDa), used as the counter-ion for siRNA complexation, on the physicochemical properties of the NPs, cytotoxicity...
Source: Biomaterials - August 23, 2017 Category: Materials Science Authors: Ben David-Naim M, Grad E, Aizik G, Nordling-David MM, Moshel O, Granot Z, Golomb G Tags: Biomaterials Source Type: research

Theranostic poly(lactic-co-glycolic acid) nanoparticle for magnetic resonance/infrared fluorescence bimodal imaging and efficient siRNA delivery to macrophages and its evaluation in a kidney injury model
In this work, a theranostic nanoparticle was developed for multimodal imaging and siRNA delivery. The core of the nanoparticles (NP) was formed by encapsulation of superparamagnetic iron oxides and indocyanine green in a PLGA matrix to serve as a multimodal probe for near-infrared (NIFR) and magnetic resonance (MR) imaging. The surface of the particle was coated with polyethylenimine (PEI) for siRNA delivery. Macrophages efficiently took up the nanoparticles and emitted strong NIFR and MR contrast.
Source: Nanomedicine : Nanotechnology, Biology, and Medicine - August 22, 2017 Category: Nanotechnology Authors: Chuanxu Yang, Hieu Vu-Quang, Dina Michelle Unnerup Husum, Stine Julie Tingskov, Mads Sloth Vinding, Thomas Nielsen, Ping Song, Niels Chr. Nielsen, Rikke N ørregaard, Jørgen Kjems Source Type: research

Theranostic poly(lactic-co-glycolic acid) nanoparticle for magnetic resonance / infrared fluorescence bimodal imaging and efficient siRNA delivery to macrophages and its evaluation in a kidney injury model
In this work, a theranostic nanoparticle was developed for multimodal imaging and siRNA delivery. The core of the nanoparticles (NP) was formed by encapsulation of superparamagnetic iron oxides and indocyanine green in a PLGA matrix to serve as a multimodal probe for near-infrared (NIFR) and magnetic resonance (MR) imaging. The surface of the particle was coated with polyethylenimine (PEI) for siRNA delivery. Macrophages efficiently took up the nanoparticles and emitted strong NIFR and MR contrast.
Source: Nanomedicine : Nanotechnology, Biology, and Medicine - August 22, 2017 Category: Nanotechnology Authors: Chuanxu Yang, Hieu Vu-Quang, Dina Michelle Unnerup Husum, Stine Julie Tingskov, Mads Sloth Vinding, Thomas Nielsen, Ping Song, Niels Chr. Nielsen, Rikke N ørregaard, Jørgen Kjems 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

Atelocollagen-mediated in vivo siRNA transfection in ovarian carcinoma is influenced by tumor site, siRNA target and administration route.
Authors: Meryet-Figuière M, Lecerf C, Varin E, Coll JL, Louis MH, Dutoit S, Giffard F, Blanc-Fournier C, Hedir S, Vigneron N, Brotin E, Pelletier L, Josserand V, Denoyelle C, Poulain L Abstract Ovarian cancer is the leading cause of death from gynecological malignancies worldwide, and innate or acquired chemoresistance of ovarian cancer cells is the major cause of therapeutic failure. It has been demonstrated that the concomitant inhibition of Bcl-xL and Mcl-1 anti-apoptotic activities is able to trigger apoptosis in chemoresistant ovarian cancer cells. In this context, siRNA-mediated Bcl‑xL and Mcl-1 inhibition...
Source: Oncology Reports - August 11, 2017 Category: Cancer & Oncology Tags: Oncol Rep Source Type: research

Local delivery of siRNA-loaded calcium phosphate nanoparticles abates pulmonary inflammation
Publication date: Available online 8 August 2017 Source:Nanomedicine: Nanotechnology, Biology and Medicine Author(s): Annika Frede, Bernhard Neuhaus, Torben Knuschke, Munisch Wadwa, Sebastian Kollenda, Robert Klopfleisch, Wiebke Hansen, Jan Buer, Dunja Bruder, Matthias Epple, Astrid M. Westendorf The local interference of cytokine signaling mediated by siRNA-loaded nanoparticles might be a promising new therapeutic approach to dampen inflammation during pulmonary diseases. For the local therapeutic treatment of pulmonary inflammation, we produced multi-shell nanoparticles consisting of a calcium phosphate core, coated wit...
Source: Nanomedicine: Nanotechnology, Biology and Medicine - August 9, 2017 Category: Nanotechnology Source Type: research

Lipophilic siRNA targets albumin in situ and promotes bioavailability, tumor penetration, and carrier-free gene silencing Engineering
Clinical translation of therapies based on small interfering RNA (siRNA) is hampered by siRNA's comprehensively poor pharmacokinetic properties, which necessitate molecule modifications and complex delivery strategies. We sought an alternative approach to commonly used nanoparticle carriers by leveraging the long-lived endogenous serum protein albumin as an siRNA carrier. We synthesized...
Source: Proceedings of the National Academy of Sciences - August 8, 2017 Category: Science Authors: Samantha M. Sarett, Thomas A. Werfel, Linus Lee, Meredith A. Jackson, Kameron V. Kilchrist, Dana Brantley-Sieders, Craig L. Duvall Tags: PNAS Plus Source Type: research

Local delivery of siRNA-loaded calcium phosphate nanoparticles abates pulmonary inflammation
The local interference of cytokine signaling mediated by siRNA-loaded nanoparticles might be a promising new therapeutic approach to dampen inflammation during pulmonary diseases. For the local therapeutic treatment of pulmonary inflammation, we produced multi-shell nanoparticles consisting of a calcium phosphate core, coated with siRNAs directed against pro-inflammatory mediators, encapsulated into poly(lactic-co-glycolic acid), and coated with a final outer layer of polyethylenimine. Nasal instillation of nanoparticles loaded with a mixture of siRNAs directed against different cytokines to mice suffering from TH1 cell-me...
Source: Nanomedicine : Nanotechnology, Biology, and Medicine - August 8, 2017 Category: Nanotechnology Authors: Annika Frede, Bernhard Neuhaus, Torben Knuschke, Munisch Wadwa, Sebastian Kollenda, Robert Klopfleisch, Wiebke Hansen, Jan Buer, Dunja Bruder, Matthias Epple, Astrid M. Westendorf Source Type: research

Suppression of TAFI by siRNA inhibits invasion and migration of breast cancer cells.
Authors: Yu C, Luan Y, Wang Z, Zhao J, Xu C Abstract Human thrombin activatable fibrinolysis inhibitor (TAFI), also known as carboxypeptidase B2 (CPB2), is a procarboxypeptidase enzyme. The purpose of the present study was to observe the expression of TAFI in breast cancer (BC) and breast cancer cell (BCC) lines and to investigate the effect of TAFI suppression by small interfering (si)RNA gene silencing on invasion and migration of BCC lines. A significant increase in TAFI level was identified by immunohistochemical analysis in BC tissues compared with normal breast tissues. TAFI suppression also inhibited cell vi...
Source: Molecular Medicine Reports - August 4, 2017 Category: Molecular Biology Tags: Mol Med Rep Source Type: research

Synergistic effect of siRNA ‐mediated silencing of TGF‐β R1 and TGF‐β R2 genes on the proliferation and apoptosis of penile urethral epithelial cells in hypospadiac male rats
This study ultimately demonstrated that the silencing of TGF‐β R1 and TGF‐β R2 genes could promote cell proliferation and inhibit apoptosis of penile UECs in hypospadiac male rats. This article is protected by copyright. All rights reserved
Source: Journal of Cellular Biochemistry - August 4, 2017 Category: Biochemistry Authors: Chao Wang, Yan ‐Yan Qiao Tags: Article Source Type: research

GSE94393 Expression data from KEAP1 overexpression and NRF2 siRNA knockdown of A549 NSCLC cell
Contributors : Akhileshwar Namani ; Xiu J Wang ; Xiuwen TangSeries Type : Expression profiling by arrayOrganism : Homo sapiensKEAP1 overexpressed and NRF2 siRNA knockdown A549 NSCLC cells were used to identify downstream genes of NRF2 pathway separately and by combinatorial analysis. We used triplicate microarrays of transfected A549 cells with mKeap1-GFP for overexpression, siRNAs targeting NRF2 for knockdown and siGFP as control respectively. As a result, we identified several genes which are involved in cancer metabolic functions in these cells.We used microarrays to identify the gene downregulated in both KEAP1 overexp...
Source: GEO: Gene Expression Omnibus - August 2, 2017 Category: Genetics & Stem Cells Tags: Expression profiling by array Homo sapiens Source Type: research

Inhalable siRNA-loaded nano-embedded microparticles engineered using microfluidics and spray drying.
This study demonstrates that inexpensive and scalable micromixers can be used to optimize the production of siRNA-dendrimer nanocomplexes, and they can be applied in combination with spray drying for the engineering of dry powder formulations suitable for delivery of siRNA to the therapeutic target site. PMID: 28780275 [PubMed - as supplied by publisher]
Source: European Journal of Pharmaceutics and Biopharmaceutics - August 2, 2017 Category: Drugs & Pharmacology Authors: Agnoletti M, Bohr A, Thanki K, Wan F, Zeng X, Peter Boetker J, Yang M, Foged C Tags: Eur J Pharm Biopharm Source Type: research

GSE71141 Gene expression signatures in SPIN1 siRNA- and negative control-transfected breast cancer cell line MCF-7/ADM
Contributors : Peng Gao ; Xu ChenSeries Type : Expression profiling by arrayOrganism : Homo sapiensTo screen potential target genes of SPIN1 in breast cancer, human gene expression microarray was performed to identify differentially expressed mRNAs in SPIN1 siRNA or negative control transfected MCF-7/ADM cells. After transfection with SPIN1 siRNA, 4409 genes were differentially expressed by>2-fold in MCF-7/ADM cells compared with negative control-transfected cells, of which 2413 were significantly downregulated and the other 1996 were upregulated. Differentially expressed genes were submitted to GO and KEGG pathway analysis.
Source: GEO: Gene Expression Omnibus - August 1, 2017 Category: Genetics & Stem Cells Tags: Expression profiling by array Homo sapiens Source Type: research

Modulating circulating sFlt1 in an animal model of preeclampsia using PAMAM nanoparticles for siRNA delivery
Excessive circulating sFlt1 plays a major role in the pathogenesis of preeclampsia (PE). Using RNAi to silence sFlt1 may be a therapy for treating PE. Because of the rapid degradation of siRNA, gene therapy in vivo remains limited. Poly-amidoamine (PAMAM) has been demonstrated to be an excellent nanocarrier for siRNA delivery with no discernible toxicity.
Source: Placenta - August 1, 2017 Category: Reproduction Medicine Authors: Jun Yu, Jing Jia, Xijiao Guo, Ruibao Chen, Ling Feng Source Type: research

MnAl-Layered Double Hydroxide Nanoparticles as a Dual-functional Platform for Magnetic Resonance Imaging and siRNA Delivery.
Abstract Multifunctional nanoparticles for cancer theranosis have been widely explored for effective cancer detection and therapy. In this research, dually functionalised manganese-based layered double hydroxide nanoparticles (Mn-LDHs) have been examined as an effective anticancer drug/gene delivery system and T1-weighted magnetic resonance imaging (MRI) modality for brain cancer theranostics. Such Mn-LDHs have been shown to accommodate dsDNA/siRNAs and efficiently deliver to Neuro-2a cells (N2a). Mn-LDHs have also shown high biocompatibility with low cytotoxicity. Importantly, the cell death-siRNA (CD-siRNA) deli...
Source: Chemistry - August 1, 2017 Category: Chemistry Authors: Zuo H, Chen W, Li B, Xu K, Cooper H, Gu Z, Xu ZP Tags: Chemistry Source Type: research

Effect of CCL2 siRNA on proliferation and apoptosis in the U251 human glioma cell line.
In conclusion, CCL2 siRNA exhibited effective inhibition of cell proliferation and angiogenesis in the glioma cell line U251, which may provide a theoretical basis for the use of CCL2 in in vivo research and clinical treatment as a novel anticancer agent. PMID: 28714025 [PubMed - as supplied by publisher]
Source: Molecular Medicine Reports - July 19, 2017 Category: Molecular Biology Tags: Mol Med Rep Source Type: research

Optimized solid-phase assisted synthesis of oleic acid-containing siRNA nanocarriers.
Abstract Cationic lipo-oligomers containing unsaturated oleic acid are potent siRNA carriers based on electrostatic and hydrophobic lipo-polyplex formation and endosomal membrane destabilization. Lipo-oligomers can be produced by solid-phase supported synthesis in sequence-defined form. However, the trifluoroacetic acid (TFA)-mediated removal of acid-labile protecting groups and cleavage from the resin can be accompanied by side products caused by addition of TFA to the double bonds of oleic acid. Under aqueous conditions, these TFA adducts of oleic acid are converted into hydroxystearic acid derivatives. The clea...
Source: ChemMedChem - July 17, 2017 Category: Chemistry Authors: Reinhard S, Zhang W, Wagner E Tags: ChemMedChem Source Type: research

Interfacial analysis of siRNA complexes with poly-ethylenimine (PEI) or PAMAM dendrimers in gene delivery
Publication date: 1 October 2017 Source:Colloids and Surfaces B: Biointerfaces, Volume 158 Author(s): Patrick K.C. Chang, Clive A. Prestidge, Kristen E. Bremmell Solution and interfacial analysis has been employed to gain insight into the complexation of siRNA using either G4 PAMAM dendrimers or 25kDa branched poly-ethylenimine (bPEI). The size, charge and shape/structure of the complexing agents were probed using atomic force microscopy (AFM), circular dichroism spectrometry (CD), dynamic light scattering (DLS), and gel electrophoresis (GE). The binding capability of these cationic polymers to the siRNA molecule, subsequ...
Source: Colloids and Surfaces B: Biointerfaces - July 16, 2017 Category: Biochemistry Source Type: research

Interleukin-4 receptor-targeted delivery of Bcl-xL siRNA sensitizes tumors to chemotherapy and inhibits tumor growth.
In this study, we exploited IL-4R-targeted delivery of Bcl-xL siRNA to IL-4R-expressing tumor cells in order to sensitize them to chemotherapy. To target IL-4R, an IL-4R-binding peptide, IL4RPep-1, was attached to branched polyethyleneimine-superparamagnetic iron oxide nanoparticles (BPEI-SPION). These nanoparticles were then complexed with Bcl-xL-targeting siRNA. IL-4R-targeted BPEI-SPION/Bcl-xL siRNA more efficiently reduced Bcl-xL gene expression and enhanced cytotoxicity of doxorubicin in MDA-MB231 breast tumor cells compared to untargeted BPEI-SPION/Bcl-xL siRNA. The siRNA was released from the complexes after 15 h o...
Source: Biomaterials - July 15, 2017 Category: Materials Science Authors: Guruprasath P, Kim J, Gunassekaran GR, Chi L, Kim S, Park RW, Kim SH, Baek MC, Bae SM, Kim SY, Kim DK, Park IK, Kim WJ, Lee B Tags: Biomaterials Source Type: research

Advances in quantum dot-mediated siRNA delivery
Publication date: Available online 13 July 2017 Source:Chinese Chemical Letters Author(s): Zhi-Yao He, Zhao-Hui Jin, Mei Zhan, Zhou Qin, Zhi Li, Ting Xu Nano-sized quantum dots (QDs) exhibit uniquely optical properties that are tunable with different sizes and shapes. QDs can emit narrow symmetric bands under a wide excitation range, possess anti-photobleaching stability, and be bio-functionalized on the large surface area. Therefore, QDs are attractive vectors for imaging-guided therapy. Small-interfering RNA (siRNAs)-based therapeutics hold great potential to target a large part of the currently undruggable genes, but o...
Source: Chinese Chemical Letters - July 14, 2017 Category: Chemistry Source Type: research

Amelioration of cirrhotic portal hypertension by targeted cyclooxygenase-1 siRNA delivery to liver sinusoidal endothelium with polyethylenimine grafted hyaluronic acid
In this study, hyaluronate-graft-polyethylenimine (HA-PEI) was synthesized for the targeted delivery of COX-1 siRNA to LSECs. Compared to non-targeted PEI, HA-PEI mediated much more efficient siRNA delivery, which resulted in potent targeted gene silencing in LSECs. In vivo, HA-PEI notably increased the accumulation of siRNA along the sinusoidal lining of the liver, inhibited over-activation of the COX-1/TXA2 pathway in LSECs, and successfully reduced portal pressure in cirrhotic mice. These results highlight the potential of HA-PEI complexed siRNA to serve as a LSECs-specific nanomedical system for effective gene therapy ...
Source: Nanomedicine: Nanotechnology, Biology and Medicine - July 13, 2017 Category: Nanotechnology Source Type: research

Bidirectional manipulation of gene expression in adipocytes using CRISPRa and siRNA
Conclusions We demonstrate that the CRISPRa SAM system can be easily adopted and used to efficiently manipulate gene expression in pre- and mature adipocytes in vitro. Moreover, we describe a novel methodological approach combining the activation of endogenous genes and siRNA-mediated gene silencing, thus providing a powerful tool to functionally decipher genetic factors controlling adipogenesis and adipocyte functions.
Source: Molecular Metabolism - July 9, 2017 Category: Endocrinology Source Type: research

Synthesis and characterization of amino acid-functionalized calcium phosphate nanoparticles for siRNA delivery
Publication date: 1 October 2017 Source:Colloids and Surfaces B: Biointerfaces, Volume 158 Author(s): Feray Bakan, Goknur Kara, Melike Cokol Cakmak, Murat Cokol, Emir Baki Denkbas Small interfering RNAs (siRNA) are short nucleic acid fragments of about 20–27 nucleotides, which can inhibit the expression of specific genes. siRNA based RNAi technology has emerged as a promising method for the treatment of a variety of diseases. However, a major limitation in the therapeutic use of siRNA is its rapid degradation in plasma and cellular cytoplasm, resulting in short half-life. In addition, as siRNA molecules cannot penetrate...
Source: Colloids and Surfaces B: Biointerfaces - July 8, 2017 Category: Biochemistry Source Type: research

A Combination of Guanidyl and Phenyl Groups on Dendrimer Enables Efficient siRNA and DNA Delivery.
This study provides a new strategy to develop multifunctional polymers for efficient siRNA and DNA delivery. PMID: 28686016 [PubMed - as supplied by publisher]
Source: Biomacromolecules - July 7, 2017 Category: Biochemistry Authors: Chang H, Zhang J, Wang H, Lv J, Cheng Y Tags: Biomacromolecules Source Type: research

Efficient dual siRNA and drug delivery using engineered lipoproteoplexes.
Abstract An engineered supercharged coiled-coil protein (CSP) and the cationic transfection reagent Lipofectamine 2000 are combined to form a lipoproteoplex for the purpose of dual delivery of siRNA and doxorubicin. CSP, bearing an external positive charge and axial hydrophobic pore, demonstrates the ability to condense siRNA and encapsulate the small molecule chemotherapeutic, doxorubicin. The lipoproteoplex demonstrates improved doxorubicin loading relative to Lipofectamine 2000. Furthermore, it induces effective transfection of GAPDH (60% knockdown) in MCF-7 breast cancer cells with efficiencies comparing favor...
Source: Biomacromolecules - July 7, 2017 Category: Biochemistry Authors: Liu CF, Chen R, Frezzo JA, Katyal P, Hill LK, Yin L, Srivastava N, More HT, Renfrew PD, Bonneau R, Montclare JK Tags: Biomacromolecules Source Type: research

Efficient receptor mediated siRNA delivery in vitro by folic acid targeted pentablock copolymer-based micelleplexes.
Abstract Novel, biocompatible polyplexes, based on the combination of cationic pentablock copolymers with folic acid functionalized copolymers were designed and developed for target-specific siRNA delivery. The resulting micelleplexes spontaneously formed polymeric micelles with a hydrophobic core surrounded directly by a cationic poly-2-(4-azidobutyl)-oxazole (PABOXA) and subsequently shielded by hydrophilic poly-2-methyl-oxazole (PMOXA) layer. The described micelleplexes form highly stable particles even in complete serum after 24 h compared with the highly cationic polymer PEI, which show aggregate formation in...
Source: Biomacromolecules - July 4, 2017 Category: Biochemistry Authors: Lehner R, Liu K, Wang X, Hunziker P Tags: Biomacromolecules Source Type: research

Mannose-conjugated layered double hydroxide nanocomposite for targeted siRNA delivery to enhance cancer therapy
Publication date: Available online 22 June 2017 Source:Nanomedicine: Nanotechnology, Biology and Medicine Author(s): Li Li, Run Zhang, Wenyi Gu, Zhi Ping Xu Sheet-like layered double hydroxide nanoparticles (LDH NPs) have showed great potentials in biomedical applications such as nanocarriers for drug and gene delivery, biosensors and imaging agents. However, target delivery of drugs and genes using LDH NPs to the desired tumor sites is a major challenge in cancer therapy. The aim of this study is to develop a functional LDH-based nanocomposite for target delivery of siRNA to cancer cells. Mannose as a targeting moiety wa...
Source: Nanomedicine: Nanotechnology, Biology and Medicine - July 1, 2017 Category: Nanotechnology Source Type: research

High-Content siRNA Screen of the Kinome Identifies Kinases Involved in Git2-Induced Mesenchymal-Epithelial Transition.
Abstract Epithelial-mesenchymal transition (EMT) and its reverse process mesenchymal-epithelial transition (MET) programs are involced in the metastatic process. More and more evidence confirms that EMT is vital for the initiation and dissemination of cancer cells whereas MET is critical for successful metastatic colonization of a secondary organ. The regulating mechanism of EMT mediated cancer progression and metastasis has been deeply investigated. However, what processes are dependent on MET in metastatic cascades remains unclear. Here, we created a cell based high-content siRNA screen using the breast cancer c...
Source: Molekuliarnaia Biologiia - July 1, 2017 Category: Molecular Biology Authors: Cao MG, Xu J, Yang QF, Guo ZP, Zhang KB, Li XB, Wu SQ, Zhou W Tags: Mol Biol (Mosk) Source Type: research

GSE100589 Gene expression profiling of SAS cell line transfected with siRNA targeting CYLD
Contributors : Satoru Shinriki ; Hirofumi JonoSeries Type : Expression profiling by arrayOrganism : Homo sapiensOral squamous cell carcinoma (OSCC) has a very poor prognosis due to its highly invasive nature, and 5-year survival rate has not changed apparently for the past 30 years. Although cylindromatosis (CYLD) is thought as a potent tumor suppressor, its biological and clinical significances in OSCC are largely unknown. The aim of this study was to clarify roles of CYLD in OSCC progression. Our immunohistochemical analyses revealed that CYLD expression was significantly reduced at invasive lesions in OSCC tissues where...
Source: GEO: Gene Expression Omnibus - June 29, 2017 Category: Genetics & Stem Cells Tags: Expression profiling by array Homo sapiens Source Type: research