当前位置： SCI文献检索 > MOLECULAR PHARMACEUTICS期刊下所有文献 > Synthesis, characterization, and gene delivery of poly-L-lysine octa(3-aminopropyl)silsesquioxane dendrimers: nanoglobular drug carriers with precisely defined molecular architectures.

Synthesis, characterization, and gene delivery of poly-L-lysine octa(3-aminopropyl)silsesquioxane dendrimers: nanoglobular drug carriers with precisely defined molecular architectures.

Abstract：

:Macromolecules with defined nanosizes--nanoglobules--were synthesized and characterized as novel drug carriers with precise molecular architectures. Poly-L-lysine dendrimers with a cubic octa(3-aminopropyl)silsesquioxane (OAS) core, (L-lysine 8-OAS, (L-lysine) 16-(L-lysine) 8-OAS, (L-lysine) 32-(L-lysine) 16-(L-lysine) 8-OAS, and (L-lysine) 64-(L-lysine) 32-(L-lysine) 16-(L-lysine) 8-OAS, were divergently synthesized by solution phase peptide chemistry in good yield and purity. Matrix-assisted laser desorption time of flight (MALDI-TOF) mass spectrometry showed complete substitution of the surface amino groups of lower generation dendrimers during synthesis, as well as precisely defined molecular architectures of the nanoglobules. The structures of the nanoglobules were further characterized by (1)H- and (13)C-NMR and 2D-NMR (correlation spectroscopy (COSY) and pulsed-field-gradient heteronuclear multiple quantum correlation (gHMQC)) spectroscopy. The (1)H-NMR spectroscopy revealed that the nanoglobules had a relatively rigid molecular architecture. Cytotoxicity studies showed that these nanoglobules exhibited a size-dependent toxicity, but it was much lower than that of linear poly-L-lysine. Preliminary in vitro nucleic acid delivery studies have shown that these globular dendrimers can efficiently deliver plasmid DNA to MDA-MB-231 cells. These nanoglobules hold much promise as safe drug carriers with precisely defined molecular architecture.

journal_name

Mol Pharm

journal_title

Molecular pharmaceutics

authors

Kaneshiro TL,Wang X,Lu ZR

doi

10.1021/mp070036z

subject

Has Abstract

pub_date

2007-09-01 00:00:00

pages

759-68

issue

5

eissn

1543-8384

issn

1543-8392

journal_volume

4

pub_type

杂志文章

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