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Specialty: Drugs & Pharmacology

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Total 3220 results found since Jan 2013.

Single pot organic solvent-free thermocycling technology for siRNA-ionizable LNPs: a proof-of-concept approach for alternative to microfluidics
Drug Deliv. 2022 Dec;29(1):2644-2657. doi: 10.1080/10717544.2022.2108523.ABSTRACTIonizable LNPs are the latest trend in nucleic acid delivery. Microfluidics technology has recently gained interest owing to its rapid mixing, production of nucleic acid-ionizable LNPs, and stability of nucleic acid inside the body. Industrial scale-up, nucleic acid-lipid long-term storage instability, and high production costs prompted scientists to seek alternate solutions to replace microfluidic technology. We proposed a single-pot, organic solvent-free thermocycling technology to efficiently and economically overcome most of the limitation...
Source: Drug Delivery - August 11, 2022 Category: Drugs & Pharmacology Authors: Anindita De Young Tag Ko Source Type: research

The therapeutic prospects of N-acetylgalactosamine-siRNA conjugates
RNA interference has become increasingly used for genetic therapy following the rapid development of oligonucleotide drugs. Significant progress has been made in its delivery system and implementation in the treatment of target organs. After a brief introduction of RNA interference technology and siRNA, the efficiency and stability of GalNAc-siRNA conjugates are highlighted since several oligonucleotide drugs of GalNAc have been approved for clinical use in recent years. The structure and features of GalNAc-siRNA conjugates are studied and the clinical efficiency and limitations of oligonucleotide-based drugs are summarize...
Source: Frontiers in Pharmacology - December 14, 2022 Category: Drugs & Pharmacology Source Type: research

Ultrasound-mediated mesoporous silica nanoparticles loaded with PDLIM5 siRNA inhibit gefitinib resistance in NSCLC cells by attenuating EMT
Eur J Pharm Sci. 2023 Jan 5:106372. doi: 10.1016/j.ejps.2023.106372. Online ahead of print.ABSTRACTEpidermal growth factor receptor tyrosine kinase inhibitor (EGFR TKIs) was one of the main drugs in the treatment of non-small cell lung cancer (NSCLC). Previous studies had demonstrated that PDZ and LIM Domain 5 (PDLIM5) played an important role in EGFR TKIs resistance. However, there was no feasible method to eliminate EGFR TKIs resistance by suppressing this gene. Here, we formulated a novel mesoporous silica-loaded PDLIM5 siRNA (Small interfering RNA) nanoplatforms. The results have shown that PDLIM5 siRNA could be effect...
Source: European Journal of Pharmaceutical Sciences - January 9, 2023 Category: Drugs & Pharmacology Authors: Hao Wu Wen-Hao Lv Yang-Yang Zhu Ying-Ying Jia Fang Nie Source Type: research

siRNA drug delivery across the blood-brain barrier in Alzheimer's Disease
Adv Drug Deliv Rev. 2023 Jun 21:114968. doi: 10.1016/j.addr.2023.114968. Online ahead of print.ABSTRACTAlzheimer's disease (AD) is a progressive neurodegenerative disease with a few FDA-approved drugs that provide modest symptomatic benefits and only two FDA-approved disease-modifying treatments for AD. The advancements in understanding the causative genes and non-coding sequences at the molecular level of the pathophysiology of AD have resulted in several exciting research papers that employed small interfering RNA (siRNA)-based therapy. Although siRNA is being sought by academia and biopharma industries, several challeng...
Source: Advanced Drug Delivery Reviews - June 23, 2023 Category: Drugs & Pharmacology Authors: Muhammad Imran Sajid Fahad Sultan Sheikh Faiza Anis Nourina Nasim Rachita K Sumbria Surya M Nauli Rakesh Kumar Tiwari Source Type: research

Biophysical characterization of siRNA-loaded Lipid Nanoparticles with different PEG content in an aqueous system
This study evaluated the influence of PEGylation and stress conditions on the stability of siRNA-loaded LNPs with different concentrations of PEG (0.5 mol%; 0.5% PEG-LNP and 1.0 mol%; 1.0% PEG-LNP) anchored to their surface. We applied end-over-end agitation, elevated temperature, and repeated freeze and thaw (F/T) cycles as physicochemical stressors of pH and ionic strength. Dynamic light scattering (DLS), flow imaging microscopy (FIM), and ionic-exchange chromatography (IEX) were to determine the degree of aggregation and change in siRNA content. The results indicate that 0.5% PEG-LNP resisted aggregation only at low pH ...
Source: European Journal of Pharmaceutics and Biopharmaceutics - July 29, 2023 Category: Drugs & Pharmacology Authors: Ki Hyun Kim Ripesh Bhujel Ravi Maharjan Jae Chul Lee Hun Soon Jung Hye Jeong Kim Nam Ah Kim Seong Hoon Jeong Source Type: research

siRNA Design Principles and Off-Target Effects
Short interfering RNAs (siRNAs) are a major research tool that allows for knock-down of target genes via selective mRNA destruction in almost all eukaryotic organisms. siRNAs typically consist of a synthetic ∼21 nucleotide (nt) RNA-duplex where one strand is designed with perfect complementarity to the target mRNA. Although siRNAs were initially thought to be very target-specific because of their design, it turned out during the last years that all siRNAs have a more or less pronounced intrinsic off-target activity which can make the interpretation of data from siRNA experiments difficult. Here we describe essential ru...
Source: Springer protocols feed by Pharmacology/Toxicology - February 26, 2013 Category: Drugs & Pharmacology Source Type: news

siRNA Delivery to the Lung: What's New?
Abstract RNA interference (RNAi) has been thought of as the general answer to many unmet medical needs. After the first success stories, it soon became obvious that short interfering RNA (siRNA) is not suitable for systemic administration due to its poor pharmacokinetics. Therefore local administration routes have been adopted for more successful in vivo RNAi. This paper reviews nucleic acid modifications, nanocarrier chemistry, animal models used in successful pulmonary siRNA delivery, as well as clinical translation approaches. We summarize what has been published recently and conclude with the potential problem...
Source: Advanced Drug Delivery Reviews - June 4, 2014 Category: Drugs & Pharmacology Authors: Merkel OM, Rubinstein I, Kissel T Tags: Adv Drug Deliv Rev Source Type: research