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Total 393 results found since Jan 2013.

Preparation and characterization of silk fibroin/oligochitosan nanoparticles for siRNA delivery.
In this study, oligochitosan (OC) combined with silk fibroin (SF) was formulated and proposed as a novel carrier for siRNA. The obtained SF/OC/siRNA nanoparticles (NPs) were characterized according to their physicochemical properties, such as their size, zeta potential, loading efficiency, stability, cytotoxicity, cellular uptake and transfection efficiency, and their properties were compared with those of OC polyplexes. The mean diameter of SF/OC/siRNA NPs was not significantly different compared to polyplexes, and the particle size ranged between 250 and 450nm. Increased amounts of SF in NPs enhanced their loading effici...
Source: Colloids and Surfaces - November 2, 2015 Category: Biotechnology Authors: Shahbazi B, Taghipour M, Rahmani H, Sadrjavadi K, Fattahi A Tags: Colloids Surf B Biointerfaces Source Type: research

Lipid-based siRNA Delivery Systems: Challenges, Promises and Solutions Along the Long Journey.
Abstract RNA interference (RNAi) is an evolutionary conserved highly specific gene-silencing mechanism initiated by small interfering RNA (siRNA) molecules. Fast-paced preclinical and clinical studies helped the siRNA technology become an efficient tool for undruggable targets in different diseases including genetic diseases, viral diseases and cancer. Despite great feature of siRNAs that can down-regulate any protein in the cells, the full potential and the success of the preclinical studies could not be translated into largely successful clinical outcomes. It has become clear that the possibility of overcoming t...
Source: Current Pharmaceutical Biotechnology - March 31, 2016 Category: Biotechnology Authors: Sarisozen C, Salzano G, Torchilin VP Tags: Curr Pharm Biotechnol Source Type: research

Phenylboronic acid-functionalized polyamidoamine-mediated Bcl-2 siRNA delivery for inhibiting the cell proliferation.
In conclusion, the PPP-mediated Bcl-2 siRNA delivery could potentially be an effective platform for solving the drug resistance and further achieving the combined chemotherapy and gene therapy in tumor treatment. PMID: 27371891 [PubMed - as supplied by publisher]
Source: Colloids and Surfaces - June 19, 2016 Category: Biotechnology Authors: Wu D, Yang J, Xing Z, Han H, Wang T, Zhang A, Yang Y, Li Q Tags: Colloids Surf B Biointerfaces Source Type: research

A dual targeting drug delivery system for penetrating blood brain barrier and selectively delivering siRNA to neurons for Alzheimer's disease treatment.
CONCLUSION: In conclusion, this study preliminarily demonstrated the ApoA-I and NL4 dual modified dendrimer nanoparticles were efficient carrier for siRNA delivery to AD bearing brain. PMID: 29484985 [PubMed - as supplied by publisher]
Source: Current Pharmaceutical Biotechnology - February 26, 2018 Category: Biotechnology Authors: Zhang C, Gu Z, Shen L, Liu X, Lin H Tags: Curr Pharm Biotechnol Source Type: research

Near-infrared light-activatable siRNA delivery by microcapsules for combined tumour therapy.
Authors: Rui Y, Pang B, Zhang J, Liu Y, Hu H, Liu Z, Ama Baidoo S, Liu C, Zhao Y, Li S Abstract A polyelectrolyte microcapsule-based layer-by-layer (LbL) technique has been widely used as a multifunctional vehicle for combined tumor therapy. Meanwhile, with the rapid development of combined tumour therapy, the challenge for designing multifunctional drug delivery system has attracted much more attention. Herein, we developed a new type of microcapsule (MC) system called MPA@siRNA@DOX@MC, which conjugated with siRNA and DOX as well as ICG-Der-02 (MPA) by electrostatic absorption. MPA as indocyanine green (ICG) fluor...
Source: Artificial Cells, Nanomedicine and Biotechnology - March 14, 2018 Category: Biotechnology Tags: Artif Cells Nanomed Biotechnol Source Type: research

Mucus-penetrating PEGylated polysuccinimide-based nanocarrier for intravaginal delivery of siRNA battling sexually transmitted infections.
Abstract Intravaginal delivery of siRNA for prevention of sexually transmitted infections faces obstacles such as the acidic environment and vaginal mucus barrier. To achieve effective protection and delivery of siRNA, we developed a polysuccinimide (PSI)-based nanocarrier (PSI-PEG-API-PMA, PPAP) by conjugating methoxy polyethylene glycol amine (Me-PEG-NH2, Mw 5000), 1-(3-aminopropyl)imidazole (API), and 1-pyrenemethylamine hydrochloride (PMA) to PSI. PPAP demonstrated a spherical self-assembled nanostructure before and after encapsulation of a model siRNA. Variable electrostatic interaction between API and siRNA ...
Source: Colloids and Surfaces - July 28, 2020 Category: Biotechnology Authors: Currie S, Kim S, Gu X, Ren X, Lin F, Liu S, Yang C, Kim JH, Liu S Tags: Colloids Surf B Biointerfaces Source Type: research

Rigid nanoparticle-based delivery of anti-cancer siRNA: Challenges and opportunities.
Abstract Gene therapy is a promising strategy to treat various genetic and acquired diseases. Small interfering RNA (siRNA) is a revolutionary tool for gene therapy and the analysis of gene function. However, the development of a safe, efficient, and targetable non-viral siRNA delivery system remains a major challenge in gene therapy. An ideal delivery system should be able to encapsulate and protect the siRNA cargo from serum proteins, exhibit target tissue and cell specificity, penetrate the cell membrane, and release its cargo in the desired intracellular compartment. Nanomedicine has the potential to deal with...
Source: Biotechnology Advances - September 4, 2013 Category: Biotechnology Authors: Wang Z, Liu G, Zheng H, Chen X Tags: Biotechnol Adv Source Type: research

Nose-to-brain delivery of BACE1 siRNA loaded in solid lipid nanoparticles for Alzheimer's therapy.
Abstract We designed a delivery system to obtain an efficient and optimal nose-to-brain transport of BACE1 siRNA, potentially useful in the treatment of Alzheimer's disease. We selected a cell-penetrating peptide, the short peptide derived from rabies virus glycoprotein known as RVG-9R, to increase the transcellular pathway in neuronal cells. The optimal molar ratio between RVG-9R and BACE1 siRNA was elucidated. The complex between the two was then encapsulated. We propose chitosan-coated and uncoated solid lipid nanoparticles (SLNs) as a nasal delivery system capable of exploiting both olfactory and trigeminal ne...
Source: Colloids and Surfaces - January 18, 2017 Category: Biotechnology Authors: Rassu G, Soddu E, Posadino AM, Pintus G, Sarmento B, Giunchedi P, Gavini E Tags: Colloids Surf B Biointerfaces Source Type: research

Advances in siRNA delivery in cancer therapy.
Authors: Singh A, Trivedi P, Jain NK Abstract RNA interference (RNAi)-based therapeutic approaches are under vibrant scrutinisation to seek cancer cure. siRNA suppress expression of the carcinogenic genes by targeting the mRNA expression. However, in vivo systemic siRNA therapy is hampered by the barriers such as poor cellular uptake, instability under physiological conditions, off-target effects and possible immunogenicity. To overcome these challenges, systemic siRNA therapy warrants the development of clinically suitable, safe, and effective drug delivery systems. Herein, we review the barriers, potential siRNA ...
Source: Artificial Cells, Nanomedicine and Biotechnology - April 22, 2017 Category: Biotechnology Tags: Artif Cells Nanomed Biotechnol Source Type: research

Nanotechnology-Based Strategies for siRNA Brain Delivery for Disease Therapy.
Abstract Small interfering RNA (siRNA)-based gene silencing technology has demonstrated significant potential for treating brain-associated diseases. However, effective and safe systemic delivery of siRNA into the brain remains challenging because of biological barriers such as enzymatic degradation, short circulation lifetime, the blood-brain barrier (BBB), insufficient tissue penetration, cell endocytosis, and cytosolic transport. Nanotechnology offers intriguing potential for addressing these challenges in siRNA brain delivery in conjunction with chemical and biological modification strategies. In this review, ...
Source: Trends in Biotechnology - February 5, 2018 Category: Biotechnology Authors: Zheng M, Tao W, Zou Y, Farokhzad OC, Shi B Tags: Trends Biotechnol Source Type: research

Development and characterization of a novel cationic PEGylated niosome-encapsulated forms of doxorubicin, quercetin and siRNA for the treatment of cancer by using combination therapy.
Authors: Hemati M, Haghiralsadat F, Yazdian F, Jafari F, Moradi A, Malekpour-Dehkordi Z Abstract The aim of this study was to optimize the cationic PEGylated niosome-containing anti-cancer drugs and siRNA to enhance the therapeutic response. Therefore, various surfactant-based (tween-60) vesicles of doxorubicin (DOX; a chemotherapeutic drug) and quercetin (QC; a chemosensitizer) were prepared. To load siRNA on niosomes, 1, 2-dioleoyl-3-trimethylammonium-propane (DOTAP) was used as a cationic lipid. The optimum formulation containing tween-60:cholesterol:DPPC:DOTAP:DSPE-PEG2000 at 49.5:5.5:15:25:5 demonstrated that ...
Source: Artificial Cells, Nanomedicine and Biotechnology - July 24, 2018 Category: Biotechnology Tags: Artif Cells Nanomed Biotechnol Source Type: research

Cyclic peptide-based nanostructures as efficient siRNA carriers.
Authors: Panigrahi B, Singh RK, Mishra S, Mandal D Abstract RNA interference shows a great strategy for biological studies; however, delivering of small interfering RNA (siRNA) remains challenging. Although several delivery vehicles, including cell-penetrating peptides, have been developed, their implementation is often restricted because of their endosomal entrapment. Herein, we report the formation of self-assembled nanostructures from rationally designed cyclic peptides and explore them for efficient delivery of functional biomacromolecules such as siRNA into mammalian cells. The newly obtained soft materials ma...
Source: Artificial Cells, Nanomedicine and Biotechnology - October 14, 2018 Category: Biotechnology Tags: Artif Cells Nanomed Biotechnol Source Type: research

Co-delivery of curcumin and Bcl-2 siRNA by PAMAM dendrimers for enhancement of the therapeutic efficacy in HeLa cancer cells.
Abstract Co-delivery of therapeutic agents and small interfering RNA (siRNA) can be achieved by a suitable nanovehicle. In this work, the solubility and bioavailability of curcumin (Cur) were enhanced by entrapment in a polyamidoamine (PAMAM) dendrimer, and a polyplex was formed by grafting Bcl-2 siRNA onto the surface amine groups to produce PAMAM-Cur/Bcl-2 siRNA nanoparticles (NPs). The synthesized polyplex NPs had a particle size of ∼180 nm, and high Cur loading content of ∼82 wt%. Moreover, the PAMAM-Cur/Bcl-2 siRNA NPs showed more effective cellular uptake, and higher inhibition of tumor cell proliferat...
Source: Colloids and Surfaces - December 26, 2019 Category: Biotechnology Authors: Ghaffari M, Dehghan G, Baradaran B, Zarebkohan A, Mansoori B, Soleymani J, Ezzati Nazhad Dolatabadi J, Hamblin MR Tags: Colloids Surf B Biointerfaces Source Type: research

A Role for Peptides in Overcoming Endosomal Entrapment in siRNA Delivery - A Focus on Melittin.
Abstract siRNA has the possibility to revolutionize medicine by enabling highly specific and efficient silencing of proteins involved in disease pathogenesis. Despite nearly 20years of research dedicated to translating siRNA from a research tool into a clinically relevant therapeutic, minimal success has been had to date. Access to RNA interference machinery located in the cytoplasm is often overlooked, but must be considered when designing the next generation of siRNA delivery strategies. Peptide transduction domains (PTD) have demonstrated moderate siRNA transfection, which is primarily limited by endosomal entr...
Source: Biotechnology Advances - May 26, 2015 Category: Biotechnology Authors: Hou KK, Pan H, Schlesinger PH, Wickline SA Tags: Biotechnol Adv Source Type: research

Structural studies of the formation of lipoplexes between siRNA and selected bis-imidazolium gemini surfactants.
In this study, we demonstrated that bis-imidazolium gemini surfactants with variable lengths of dioxyalkyl linker groups (from dioxyethyl to dioxydodecyl) and dodecyl side chains are excellent for the complexation of siRNA. All of these compounds effectively complexed siRNA in a charge ratio range (p/n) of 1.5-10. The low resolution structure of siRNA oligomers was characterised by small angle scattering of synchrotron radiation (SR-SAXS) and ab initio modelling. The structures of the formed complexes were also analysed using SR-SAXS, circular dichroism studies and electrophoretic mobility tests. The most promising agents ...
Source: Colloids and Surfaces - June 28, 2016 Category: Biotechnology Authors: Andrzejewska W, Pietralik Z, Skupin M, Kozak M Tags: Colloids Surf B Biointerfaces Source Type: research