期刊
JOURNAL OF CONTROLLED RELEASE
卷 244, 期 -, 页码 24-29出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jconrel.2016.11.008
关键词
Atomic force microscopy; Nucleic acid delivery; Nuclear envelope; Nuclear pore complex; Oocytes; Polyethylenimine; Transmission electron microscopy
资金
- Danish Agency for Science, Technology and Innovation (Det Frie Forskningsra for Teknologi og Produktion) [274-08-0534]
- International Science and Technology Cooperation of Guangdong Province [2015A050502002]
- Guangzhou City [2016201604030050]
- RiboBio Co, Ltd., China
It has been questioned as to whether polyplexes in the cytoplasmcan reach the nuclear compartment and if so in what form. By applying atomic force microscopy (AFM) to the nuclear envelope and the nuclear pore complexes, we demonstrate that disposition of polyethylenimine (PEI)/DNA polyplexes that were microinjected into the oocytes of Xenopus laevis, as an example of a non-dividing cell, is exclusive to the nuclear pore complex (NPC). AFM images show NPCs clogged only with sub-50 nm polyplexes. This mode of disposition neither altered the morphology/ integrity of the nuclearmembrane nor the NPC. AFM images further show polyplexes on the nucleoplasmic side of the envelope, presumably indicating species in transit. Transmission electron microscopy studies of ruptured nuclei from transfected human cell lines demonstrate the presence of sub-50 nm particles resembling polyplexes in morphology compared with control preparations. (C) 2016 Published by Elsevier B.V.
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