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@ARTICLE{Hubcik:288650,
author = {Hubcik, Lukas and Funari, Sergio de Souza and Pullmannova,
Petra and Ferdinand, Devinsky and Uhrikova, Daniela},
title = {{S}timuli responsive polymorphism of
$\mathrm{{C}_{12}{NO}/{DOPE}/{DNA}}$ complexes: {E}ffect of
p{H}, tempertaure and composition},
journal = {Biochimica et biophysica acta / Biomembranes},
volume = {1848},
number = {5},
issn = {0005-2736},
address = {Amsterdam},
publisher = {Elsevier},
reportid = {PUBDB-2015-05110},
pages = {1127 - 1138},
year = {2015},
note = {(c) Elsevier B.V. Post referee full text in progress.
Embargo for post referee full text 1 year from 07.02.2015.},
abstract = {N$_{,}$N-dimethyldodecylamine-N-oxide (C12NO) is a
surfactant that may exist either in a neutral or cationic
protonated form depending on the pH of aqueous solutions.
Using small angle X-ray diffraction (SAXD) we observe the
rich structural polymorphism of pH responsive complexes
prepared due to DNA interaction with
C12NO/dioleoylphosphatidylethanolamine (DOPE) vesicles and
discuss it in view of utilizing the surfactant for the gene
delivery vector of a pH sensitive system. In neutral
solutions, the DNA uptake is low, and a lamellar Lα phase
formed by C12NO/DOPE is prevailing in the complexes at
0.2≤C12NO/DOPE<0.6 mol/mol. A maximum of ~30\% of the
total DNA volume in the sample is bound in a condensed
lamellar phase LαC at C12NO/DOPE=1 mol/mol and pH7.2. In
acidic conditions, a condensed inverted hexagonal phase HIIC
was observed at C12NO/DOPE=0.2 mol/mol. Commensurate lattice
parameters, aHC≈dLC, were detected at
0.3≤C12NO/DOPE≤0.4 mol/mol and pH=4.9-6.4 suggesting
that LαC and HIIC phases were epitaxially related. While at
the same composition but pH~7, the mixture forms a cubic
phase (Pn3m) when the complexes were heated to 80°C and
cooled down to 20°C. Finally, a large portion of the
surfactant (C12NO/DOPE>0.5) stabilizes the LαC phase in
C12NO/DOPE/DNA complexes and the distance between DNA
strands (dDNA) is modulated by the pH value. Both the
composition and pH affect the DNA binding in the complexes
reaching up to ~95\% of the DNA total amount at acidic
conditions.},
cin = {DOOR},
ddc = {570},
cid = {I:(DE-H253)HAS-User-20120731},
pnm = {6215 - Soft Matter, Health and Life Sciences (POF3-621) /
FS-Proposal: II-20100372 EC (II-20100372-EC)},
pid = {G:(DE-HGF)POF3-6215 / G:(DE-H253)II-20100372-EC},
experiment = {EXP:(DE-H253)D-A2-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000352041100007},
pubmed = {pmid:25660321},
doi = {10.1016/j.bbamem.2015.01.020},
url = {https://bib-pubdb1.desy.de/record/288650},
}