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Gene transfer by histidylated lipopolyplexes: A dehydration method allowing preservation of their physicochemical parameters and transfection efficiency.

Abstract：

:Lipid-Polycation-DNA complexes (LPD) is a promising non-viral system for nucleic acids delivery. Usually, LPD are prepared just before their use. In the present work, we have examined whether dehydration of a new type of LPD (named LPD100) might be a storage option. LPD100 comprises PEGylated histidylated polylysine/pDNA polyplexes and a liposomal formulation made with lipophosphoramidates containing N-methylimidazolium and histamine polar heads. LPD100 were dehydrated by evaporation, and the physicochemical parameters and transfection efficiency (TE) of reconstituted LPD100 were compared to that of fresh LPD100. LPD100 previously dehydrated in the presence of 20% saccharose, displayed comparable size and surface charge as freshly prepared LPD100 but gave a better TE. CryoTEM experiments showed that the reconstituted LPD100 exhibited a shape similar to fresh ones. Moreover, when LPD100 were prepared with dehydrated pDNA/polymer complexes and fresh liposomes, TE was as efficient as with fresh LPD100 while a small increase of their size were observed. These results demonstrate that evaporation of LPD100 in the presence of saccharose is a powerful method to store them for a long period of time.

journal_name

Int J Pharm

journal_title

International journal of pharmaceutics

authors

Perche F,Lambert O,Berchel M,Jaffrès PA,Pichon C,Midoux P

doi

10.1016/j.ijpharm.2011.04.009

subject

Has Abstract

pub_date

2012-02-14 00:00:00

pages

144-50

issue

1

eissn

0378-5173

issn

1873-3476

pii

S0378-5173(11)00313-9

journal_volume

423

pub_type

杂志文章

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