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Transferrin-PEG-PE modified dexamethasone conjugated cationic lipid carrier mediated gene delivery system for tumor-targeted transfection.

Wang W, Zhou F, Ge L, Liu X, Kong F - Int J Nanomedicine (2012)

Bottom Line: As such, the aim of this study was to develop a type of vector that can target cells through receptor-mediated pathways and by using nuclear localization signal (NLS) to increase the nuclear uptake of genetic materials.A dexamethasone (Dexa)-conjugated lipid was synthesized as the material of the solid lipid nanoparticles (SLNs), and transferrin (Tf) was linked onto polyethylene glycol-phosphatidylethanolamine (PEG-PE) to obtain Tf-PEG-PE ligands for the surface modification of the carriers.Tf-PEG-PE modified SLNs/enhanced green fluorescence protein plasmid (pEGFP) had a particle size of 222 nm and a gene loading quantity of 90%.

View Article: PubMed Central - PubMed

Affiliation: Department of Chinese Medicine Integrated Traditional Chinese Medicine and Western Medicine, General Hospital of Ji'nan Command, Ji'nan, China.

ABSTRACT

Background: The main barriers to non-viral gene delivery include cellular and nuclear membranes. As such, the aim of this study was to develop a type of vector that can target cells through receptor-mediated pathways and by using nuclear localization signal (NLS) to increase the nuclear uptake of genetic materials.

Methods: A dexamethasone (Dexa)-conjugated lipid was synthesized as the material of the solid lipid nanoparticles (SLNs), and transferrin (Tf) was linked onto polyethylene glycol-phosphatidylethanolamine (PEG-PE) to obtain Tf-PEG-PE ligands for the surface modification of the carriers. The in vitro transfection efficiency of the novel modified vectors was evaluated in human hepatoma carcinoma cell lines, and in vivo effects were observed in an animal model.

Results: Tf-PEG-PE modified SLNs/enhanced green fluorescence protein plasmid (pEGFP) had a particle size of 222 nm and a gene loading quantity of 90%. Tf-PEG-PE-modified SLNs/pEGFP (Tf-SLNs/pEGFP) displayed remarkably higher transfection efficiency than non-modified SLNs/pEGFP and the vectors not containing Dexa, both in vitro and in vivo.

Conclusion: It can be concluded that Tf and Dexa could function as an excellent active targeting ligand to improve the cell targeting and nuclear targeting ability of the carriers, and the resulting nanomedicine could be a promising active targeting drug/gene delivery system.

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Related in: MedlinePlus

General reaction scheme for synthesis of Dexa-LHON.Abbreviations: Dexa, Dexamethasone; LHON, 6-lauroxyhexyl ornithinate.
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f1-ijn-7-2513: General reaction scheme for synthesis of Dexa-LHON.Abbreviations: Dexa, Dexamethasone; LHON, 6-lauroxyhexyl ornithinate.

Mentions: The Dexa–LHON conjugation reaction was performed using the method reported previously, with some modification. 6 The synthesis scheme is depicted in Figure 1. Briefly, Dexa coupling to LHON was performed with 2 equivalent of Traut’s reagent, and 2 equivalent of dexamethasone mesylate in anhydrous DMSO for 6 hours at room temperature (RT). The same volume of water was added to the reaction mixture, and it was dialyzed against pure water and filtered through a 0.45 μm, syringe-type filter, to remove insoluble impurities. Then, the product was obtained after freeze-drying, yielding a white, crystalline powder.


Transferrin-PEG-PE modified dexamethasone conjugated cationic lipid carrier mediated gene delivery system for tumor-targeted transfection.

Wang W, Zhou F, Ge L, Liu X, Kong F - Int J Nanomedicine (2012)

General reaction scheme for synthesis of Dexa-LHON.Abbreviations: Dexa, Dexamethasone; LHON, 6-lauroxyhexyl ornithinate.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3367492&req=5

f1-ijn-7-2513: General reaction scheme for synthesis of Dexa-LHON.Abbreviations: Dexa, Dexamethasone; LHON, 6-lauroxyhexyl ornithinate.
Mentions: The Dexa–LHON conjugation reaction was performed using the method reported previously, with some modification. 6 The synthesis scheme is depicted in Figure 1. Briefly, Dexa coupling to LHON was performed with 2 equivalent of Traut’s reagent, and 2 equivalent of dexamethasone mesylate in anhydrous DMSO for 6 hours at room temperature (RT). The same volume of water was added to the reaction mixture, and it was dialyzed against pure water and filtered through a 0.45 μm, syringe-type filter, to remove insoluble impurities. Then, the product was obtained after freeze-drying, yielding a white, crystalline powder.

Bottom Line: As such, the aim of this study was to develop a type of vector that can target cells through receptor-mediated pathways and by using nuclear localization signal (NLS) to increase the nuclear uptake of genetic materials.A dexamethasone (Dexa)-conjugated lipid was synthesized as the material of the solid lipid nanoparticles (SLNs), and transferrin (Tf) was linked onto polyethylene glycol-phosphatidylethanolamine (PEG-PE) to obtain Tf-PEG-PE ligands for the surface modification of the carriers.Tf-PEG-PE modified SLNs/enhanced green fluorescence protein plasmid (pEGFP) had a particle size of 222 nm and a gene loading quantity of 90%.

View Article: PubMed Central - PubMed

Affiliation: Department of Chinese Medicine Integrated Traditional Chinese Medicine and Western Medicine, General Hospital of Ji'nan Command, Ji'nan, China.

ABSTRACT

Background: The main barriers to non-viral gene delivery include cellular and nuclear membranes. As such, the aim of this study was to develop a type of vector that can target cells through receptor-mediated pathways and by using nuclear localization signal (NLS) to increase the nuclear uptake of genetic materials.

Methods: A dexamethasone (Dexa)-conjugated lipid was synthesized as the material of the solid lipid nanoparticles (SLNs), and transferrin (Tf) was linked onto polyethylene glycol-phosphatidylethanolamine (PEG-PE) to obtain Tf-PEG-PE ligands for the surface modification of the carriers. The in vitro transfection efficiency of the novel modified vectors was evaluated in human hepatoma carcinoma cell lines, and in vivo effects were observed in an animal model.

Results: Tf-PEG-PE modified SLNs/enhanced green fluorescence protein plasmid (pEGFP) had a particle size of 222 nm and a gene loading quantity of 90%. Tf-PEG-PE-modified SLNs/pEGFP (Tf-SLNs/pEGFP) displayed remarkably higher transfection efficiency than non-modified SLNs/pEGFP and the vectors not containing Dexa, both in vitro and in vivo.

Conclusion: It can be concluded that Tf and Dexa could function as an excellent active targeting ligand to improve the cell targeting and nuclear targeting ability of the carriers, and the resulting nanomedicine could be a promising active targeting drug/gene delivery system.

Show MeSH
Related in: MedlinePlus