High-performance cationic polyrotaxanes terminated with polypeptides as promising nucleic acid delivery systems

2018 ◽  
Vol 9 (17) ◽  
pp. 2281-2289 ◽  
Author(s):  
Hai-Qing Song ◽  
Yu Qi ◽  
Rui-Quan Li ◽  
Gang Cheng ◽  
Nana Zhao ◽  
...  
Keyword(s):  
Nucleic Acid ◽  
High Performance ◽  
Delivery Systems ◽  
Nucleic Acid Delivery ◽  
End Capping

A novel cationic polyrotaxane consisting of hydroxyl-rich polycationic units and degradable end-capping polypeptides was prepared for promising nucleic acid delivery.

Reduction-Responsive Nucleic Acid Delivery Systems To Prevent In-Stent Restenosis in Rabbits

2019 ◽  
Vol 11 (31) ◽  
pp. 28307-28316 ◽  
Author(s):  
Weijie Ye ◽  
Yiming Chen ◽  
Wenxiong Tang ◽  
Na Zhang ◽  
Zhonghao Li ◽  
...  
Keyword(s):  
Nucleic Acid ◽  
Delivery Systems ◽  
Nucleic Acid Delivery ◽  
Stent Restenosis ◽  
In Stent Restenosis

scholarly journals The Impact of Alkyl‐Chain Purity on Lipid‐Based Nucleic Acid Delivery Systems – Is the Utilization of Lipid Components with Technical Grade Justified?

ChemPhysChem ◽  
2019 ◽  
Vol 20 (16) ◽  
pp. 2110-2121
Author(s):  
Dorota Pawlowska ◽  
Christopher Janich ◽  
Andreas Langner ◽  
Bodo Dobner ◽  
Christian Wölk ◽  
...  
Keyword(s):  
Nucleic Acid ◽  
Alkyl Chain ◽  
Delivery Systems ◽  
Nucleic Acid Delivery ◽  
Technical Grade ◽  
The Impact ◽  
Lipid Components

scholarly journals Peptide-Assisted Nucleic Acid Delivery Systems on the Rise

2021 ◽  
Vol 22 (16) ◽  
pp. 9092
Author(s):  
Shabnam Tarvirdipour ◽  
Michal Skowicki ◽  
Cora-Ann Schoenenberger ◽  
Cornelia G. Palivan
Keyword(s):  
Nucleic Acid ◽  
Side Effects ◽  
Nucleic Acids ◽  
Delivery Systems ◽  
Inorganic Nanoparticles ◽  
Water Soluble ◽  
Nucleic Acid Delivery ◽  
Subcellular Organelles ◽  
Cell Internalization ◽  
Site Of Action

Concerns associated with nanocarriers’ therapeutic efficacy and side effects have led to the development of strategies to advance them into targeted and responsive delivery systems. Owing to their bioactivity and biocompatibility, peptides play a key role in these strategies and, thus, have been extensively studied in nanomedicine. Peptide-based nanocarriers, in particular, have burgeoned with advances in purely peptidic structures and in combinations of peptides, both native and modified, with polymers, lipids, and inorganic nanoparticles. In this review, we summarize advances on peptides promoting gene delivery systems. The efficacy of nucleic acid therapies largely depends on cell internalization and the delivery to subcellular organelles. Hence, the review focuses on nanocarriers where peptides are pivotal in ferrying nucleic acids to their site of action, with a special emphasis on peptides that assist anionic, water-soluble nucleic acids in crossing the membrane barriers they encounter on their way to efficient function. In a second part, we address how peptides advance nanoassembly delivery tools, such that they navigate delivery barriers and release their nucleic acid cargo at specific sites in a controlled fashion.

scholarly journals Viral Mimicry as a Design Template for Nucleic Acid Nanocarriers

2021 ◽  
Vol 9 ◽  
Author(s):  
Ina F. de la Fuente ◽  
Shraddha S. Sawant ◽  
Mark Q. Tolentino ◽  
Patrick M. Corrigan ◽  
Jessica L. Rouge
Keyword(s):  
Nucleic Acid ◽  
Nucleic Acids ◽  
Molecular Mechanisms ◽  
Transfection Efficiency ◽  
Delivery Systems ◽  
Endosomal Escape ◽  
Nucleic Acid Delivery ◽  
Metastable Structure ◽  
Oligonucleotide Delivery ◽  
Genome Protection

Therapeutic nucleic acids hold immense potential in combating undruggable, gene-based diseases owing to their high programmability and relative ease of synthesis. While the delivery of this class of therapeutics has successfully entered the clinical setting, extrahepatic targeting, endosomal escape efficiency, and subcellular localization. On the other hand, viruses serve as natural carriers of nucleic acids and have acquired a plethora of structures and mechanisms that confer remarkable transfection efficiency. Thus, understanding the structure and mechanism of viruses can guide the design of synthetic nucleic acid vectors. This review revisits relevant structural and mechanistic features of viruses as design considerations for efficient nucleic acid delivery systems. This article explores how viral ligand display and a metastable structure are central to the molecular mechanisms of attachment, entry, and viral genome release. For comparison, accounted for are details on the design and intracellular fate of existing nucleic acid carriers and nanostructures that share similar and essential features to viruses. The review, thus, highlights unifying themes of viruses and nucleic acid delivery systems such as genome protection, target specificity, and controlled release. Sophisticated viral mechanisms that are yet to be exploited in oligonucleotide delivery are also identified as they could further the development of next-generation nonviral nucleic acid vectors.

Nucleic Acid Delivery System by the Combination of Lipid bubbles and Ultrasound

2018 ◽  
Vol 24 (23) ◽  
pp. 2673-2677 ◽  
Author(s):  
Yoko Endo-Takahashi ◽  
Kazuo Maruyama ◽  
Yoichi Negishi
Keyword(s):  
Nucleic Acid ◽  
Nucleic Acids ◽  
Delivery System ◽  
Target Genes ◽  
Delivery Systems ◽  
Target Site ◽  
Therapeutic Effects ◽  
Nucleic Acid Delivery ◽  
Clinical Implementation ◽  
Systemic Delivery

Background: RNA interference (RNAi)-based therapy has gained attention because of its potent genesilencing effect and high specificity. However, the efficient delivery of nucleic acids to the target site is a major challenge to the clinical implementation. Recently, ultrasound-mediated gene delivery systems have been developed and attracted interest due to its safety and site-specificity. By the combination with contrast agents, called microbubbles, not only the delivery effects but also the imaging effects are significantly enhanced. We developed lipid bubbles (LBs) entrapping an ultrasound contrast gas to enhance the efficacy of ultrasound-mediated delivery and imaging. In this review, we summarize ultrasound-mediated nucleic acid delivery systems and discuss the possibility of combining LBs and ultrasound for RNAi-based therapies. Methods: We prepared polyethylene glycol-modified liposomes and entrapped an echo-contrast gas within the liposomes. Small interfering RNA (siRNA) were transfected into cells and muscles using LBs and ultrasound. Moreover, we also developed nucleic acid-loaded LBs using cholesterol-conjugated siRNA or positively-charged lipid for an efficient systemic delivery of siRNA and microRNA. The usability of LBs for RNA delivery system was evaluated by the silencing effects of target genes and the therapeutic effects on ischemia hind limb. Results: A combination of LBs and therapeutic ultrasound was able to enhance the gene silencing effects by siRNA. Nucleic acid-loaded LBs were able to efficiently deliver siRNA or microRNA by systemic administration. A combination of LBs and diagnostic ultrasound also enhanced the imaging efficiency. Using a hindlimb ischemia mouse model, microRNA-loaded LBs could lead to increased angiogenic factors and improved blood flow. Conclusion: Ultrasound technology is widely used in clinical settings not only for diagnosis but also for therapy. Ultrasonic devices are being actively developed. Computer-controlled ultrasound systems can provide precise exposure to the target site. The combination of precise ultrasound exposure and LBs might be useful for target site-specific nucleic acids delivery, and holds potential to be developed into a beneficial therapeutic and diagnostic system for various diseases.

Intelligent nucleic acid delivery systems based on stimuli-responsive polymers

Soft Matter ◽  
2010 ◽  
Vol 6 (5) ◽  
pp. 835-848 ◽  
Author(s):  
Fu-Sheng Du ◽  
Yang Wang ◽  
Rui Zhang ◽  
Zi-Chen Li
Keyword(s):  
Nucleic Acid ◽  
Delivery Systems ◽  
Nucleic Acid Delivery ◽  
Stimuli Responsive ◽  
Stimuli Responsive Polymers ◽  
Responsive Polymers
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