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Papers, explained in our own words

Every entry summarises what the study set out to test, what it found and why it changes how we design delivery systems. Browse research and reviews or search the collection.

721 articles

Showing 1–24 of 34 articles · Keyword: Polyethylenimine Clear keyword

European Journal of Medicinal Chemistry2022ReviewNon-viral Gene Delivery

1. The nano delivery systems and applications of mRNA

Mingyuan Li, Yuan Li, Shiqin Li, Lin Jia, Haomeng Wang, Meng Li, Jie Deng, Ali Zhu, Liqiao Ma, Weihong Li, Peng Yu, And Tao Zhu

The COVID-19 pandemic has greatly accelerated the application of mRNA technology, demonstrating its unique advantages over traditional biopharmaceutical and vaccine technology. However, mRNA instability in human physiological environments and inefficient in vivo delivery remain major barriers. mRNA chemical…

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Advanced Healthcare Materials2021ReviewNon-viral Gene Delivery

2. Next-Generation Vaccines: Nanoparticle-Mediated DNA and mRNA Delivery

Ho W, Gao M, Li F, Li Z, Zhang X-Q, Xu X.

Nucleic acid vaccines (DNA and mRNA) offer rapid design, adaptability to changing pathogen strains, and stimulation of both humoral and cellular immunity, but their clinical translation is limited by inefficient delivery—nucleic acids are rapidly degraded by endogenous nucleases, have poor cellular uptake due to…

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International Immunopharmacology2020ReviewNon-viral Gene Delivery

3. Nanomedicine for improvement of dendritic cell-based cancer immunotherapy

Hashemi V, Farhadi S, Ghasemi Chaleshtari M, Et Al.

Dendritic cell (DC)-based cancer immunotherapy has shown impressive outcomes, including the first FDA-approved anti-cancer vaccine, but clinical application faces challenges such as limited durable responses, antigen selection issues, and immunosuppressive tumour microenvironments. Nanoparticles (NPs) are promising…

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International Journal of Nanomedicine2020ReviewNon-viral Gene Delivery

4. Biodegradable Polymers for Gene-Delivery Applications

Chen, C.-K.; Huang, P.-K.; Law, W.-C.; Chu, C.-H.; Chen, N.-T.; Lo, L.-W

Gene therapy is limited by the fragile nature of therapeutic DNA/RNA and by safety concerns with viral vectors. Non-viral polymeric vectors are attractive, but conventional cationic polymers such as PEI, PDMAEMA, and PLL are often non-degradable, causing accumulation, cytotoxicity, and poor gene unpacking. This…

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Biochimie2019ReviewDrug Delivery

5. Strategies in the Design of Endosomolytic Agents for Facilitating Endosomal Escape in Nanoparticles

Aqeel Ahmad, Javed Masood Khan, Shafiul Haque

Endosomal escape remains the rate-limiting step for efficient gene and drug delivery using nanoparticles (NPs). Despite continuous advancements, most NPs internalised via endocytic pathways are degraded by hydrolytic enzymes in lysosomes, severely limiting therapeutic efficacy. There is an unmet need to…

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Pharmaceutics (MDPI)2019ReviewNon-viral Gene Delivery

6. Synthetic Approaches for Nucleic Acid Delivery: Choosing the Right Carriers

Run Ni, Ruoyu Fang, And Ying Chau

While many reviews have systematically covered different types of formulation materials for gene delivery, a parallel comparison of different formulation materials together with an analysis of the correlation between their material properties and nucleic acid delivery functions has not been conducted. Understanding…

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Journal of Controlled Release2019ReviewNon-viral Gene Delivery

7. Poly(β-amino ester)-based gene delivery systems From discovery to therapeutic applications

Cordeiro, R. A.; Serra, A.; Coelho, J. F. J.; Faneca, H

Gene therapy requires safe and effective delivery vectors. PBAEs are biodegradable cationic polymers with excellent gene delivery properties, but a comprehensive and critical overview of their use as gene carriers is lacking. This review provides the first comprehensive and critical overview of PBAE-based gene…

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2017ReviewNon-viral Gene Delivery

8. Molecular nanoparticle-based gene delivery systems

Jiménez Blanco Jl, Benito Jm, Ortiz Mellet C, García Fernández Jm.

Nonviral gene delivery lacks molecularly well-defined carriers suitable for rigorous structure–activity relationship (SAR) studies. Viral vectors raise immunogenicity, cost, and cargo-size concerns, while polymers, dendrimers, and cationic lipids are often polydisperse or supramolecularly ill-defined. The review…

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Nature Reviews Materials2017ReviewNon-viral Gene Delivery

9. Tools for translation: non-viral materials for therapeutic mRNA delivery

Khalid A. Hajj And Kathryn A. Whitehead

mRNA therapeutics have enormous potential for vaccines, cancer immunotherapy, protein replacement, and gene editing, but widespread clinical application is limited by the lack of safe and effective delivery vehicles. Naked mRNA is large (~10⁵–10⁶ Da), densely negatively charged, and rapidly degraded by nucleases; its…

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Molecular Therapy — Methods & Clinical Development2016ReviewNon-viral Gene Delivery

10. Production and clinical development of nanoparticles for gene delivery

Chen J, Guo Z, Tian H, Chen X.

Gene therapy is a promising strategy for treating gene-associated diseases, but clinical application is limited by inefficient delivery. Naked nucleic acids suffer from nuclease degradation, rapid renal clearance, phagocyte uptake, poor target-cell uptake, and immune-related toxicity. Nanoparticles are considered the…

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Macromolecular Bioscience2015ReviewNon-viral Gene Delivery

11. Defined Polymeric Materials for Gene Delivery

He, D.; Wagner, E

Polymeric gene delivery carriers such as PEI and poly(L-lysine) are heterogeneous and polydisperse, making site-specific multifunctional modification, structure–activity relationship studies, and reproducible clinical manufacturing difficult. This review argues that precisely defined polymeric materials — dendrimers…

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Journal of Controlled Release2015ReviewNon-viral Gene Delivery

12. Exploring the role of polymer structure on intracellular nucleic acid delivery via polymeric nanoparticles

Bishop, C. J.; Kozielski, K. L.; Green, J. J

Viral vectors raise safety concerns, and non-viral polymeric vectors still require optimisation for clinical translation. This review addresses how polymer structural features govern intracellular nucleic acid delivery — including cargo protection, cellular uptake, endosomal escape, unpacking, and nuclear delivery —…

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2015ReviewNon-viral Gene Delivery

13. Polymeric Nanocarriers for Non-Viral Gene Delivery

Li, L.; Wei, Y.; Gong, C

Viral vectors are efficient but carry risks of immunogenicity, inflammatory reactions, recombination, limited DNA cargo capacity, and manufacturing difficulties. Non-viral polymeric vectors are safer and easier to produce, but their transfection efficiency remains much lower than viral vectors because of multiple…

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Journal of drug targeting2015ReviewNon-viral Gene Delivery

14. Targeted polymeric nanoparticles for cancer gene therapy

Kim J, Wilson Dr, Zamboni Cg, Green Jj

Cancer gene therapy requires safe and efficient delivery of nucleic acids, but viral vectors carry risks of immunogenicity and insertional tumorigenicity, while non-viral polymeric vectors are safer but less efficient. The review addresses the need for targeted polymeric nanoparticles that achieve tumour-specific…

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Chemical Reviews2015ReviewNon-viral Gene Delivery

15. Nucleic Acid Therapeutics Using Polyplexes: A Journey of 50 Years (and Beyond)

Ulrich Lächelt And Ernst Wagner

Therapeutic nucleic acids—including plasmid DNA, mRNA, siRNA, miRNA, antisense oligonucleotides, and aptamers—have broad therapeutic potential, but their delivery to the correct intracellular site of action remains the dominant bottleneck. Polyplexes, formed by electrostatic complexation of nucleic acids with…

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Nature Reviews Genetics2014ReviewNon-viral Gene Delivery

16. Non-viral vectors for gene-based therapy

Yin H, Kanasty Rl, Eltoukhy Aa, Vegas Aj, Dorkin Jr, Anderson Dg.

Gene-based therapy has potential to treat a wide range of diseases, but clinical success is limited by delivery barriers. Viral vectors, while efficient, carry risks of carcinogenesis, immunogenicity, broad tropism, limited packaging capacity, and manufacturing difficulties. Non-viral vectors offer improved safety…

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Journal of Drug Targeting (J Drug Target)2013ReviewNon-viral Gene Delivery

17. Strategies on the nuclear-targeted delivery of genes

Jing Yao, Ying Fan, Yuanke Li, And Leaf Huang

Non-viral gene delivery systems are safer than viral vectors but are highly inefficient at nuclear delivery. Only ~10–20% of applied plasmid DNA enters targeted cells, and only ~1–5% of the applied dose reaches the nucleus. The nuclear envelope is a major barrier to transgene delivery, and there is a need for “smart”…

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Molecular Therapy.2013ReviewNon-viral Gene Delivery

18. Endocytosis of Gene Delivery Vectors From Clathrin-dependent to Lipid Raft-mediated Endocytosis

El-Sayed A, Harashima H

Nonviral gene delivery vectors remain less efficient than viral vectors, and their intracellular fate is strongly influenced by the endocytic route they enter. The cell membrane is now understood to contain lipid raft and non-raft domains, and the initial binding domain can determine the primary endocytic vesicle…

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Journal of Controlled Release2013ReviewNon-viral Gene Delivery

19. Chitosan-based siRNA delivery systems

Ragelle, H.; Vandermeulen, G.; Préat, V

Chitosan is attractive for siRNA delivery because it is cationic, biocompatible, biodegradable, mucoadhesive, and permeation-enhancing. However, native chitosan suffers from low solubility at physiological pH, poor buffering capacity, instability in biological fluids, and insufficient endosomal escape, limiting…

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Chemical Society Reviews2012ReviewDrug Delivery

20. Cationic polymers and their therapeutic potential

Samal, S. K.; Dash, M.; Van Vlierberghe, S.; Kaplan, D. L.; Chiellini, E.; Van Blitterswijk, C.; Moroni, L.; Dubruel, P

Cationic polymers are widely studied as non-viral gene delivery vectors, but their therapeutic potential extends well beyond gene delivery. This review addresses the need for a broader overview of cationic polymers — their synthesis, modification, bioactive properties, architectures, and applications in drug…

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2011ReviewNon-viral Gene Delivery

21. Strategies for the intracellular delivery of nanoparticles

Chou Lyt, Ming K, Chan Wcw.

Nanoparticles (NPs) are increasingly used as contrast agents, therapeutics, and delivery vehicles, but their effective delivery into cells and to specific subcellular organelles remains a major challenge. The review addresses fundamental barriers to intracellular NP delivery—plasma membrane, endosomal entrapment…

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2011ReviewNon-viral Gene Delivery

22. Bioreducible polymers for gene delivery

Kim, T.-I.; Kim, S. W

Bioreducible polymers containing disulfide linkages are attractive gene-delivery carriers because they are stable in the oxidizing extracellular environment but degrade rapidly in the reducing intracellular cytosol via thiol–disulfide exchange, triggered by high glutathione (GSH) levels. This review addresses the…

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Soft Matter2010ReviewNon-viral Gene Delivery

23. Polycation cytotoxicity a delicate matter for nucleic acid therapy—focus on polyethylenimine

Parhamifar, L.; Larsen, A. K.; Hunter, A. C.; Andresen, T. L.; Moghimi, S. M

Efficient transfection with low toxicity is essential for nucleic acid therapeutics, but synthetic polycations such as polyethylenimine (PEI) are limited by cytotoxicity. This review critically assesses the safety and efficacy challenges of PEI-based polyplexes, identifies deficiencies in the field, and proposes…

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European Journal of Pharmaceutical Sciences2010ReviewNon-viral Gene Delivery

24. Gene delivery by lipoplexes and polyplexes

Conchita Tros De Ilarduya, Yan Sun, Nejat Düzgüneş

Viral vectors achieve high gene transfer efficiency but can induce immune/inflammatory responses, have limited DNA carrying capacity, and raise recombination and cost concerns. Non-viral vectors such as cationic lipids and polymers are safer alternatives, but their transfection efficiency—especially in vivo—remains…

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