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@ARTICLE{Vlchez:285254,
author = {Vílchez, S. and Miras, J. and Farfan, S. and Tur Guasch,
Rafael and de Oliveira, N. and Pérez-Calm, A. and Grijalvo,
S. and Rodríguez-Abreu, C. and Esquena, J.},
title = {{M}icron-sized {DNA}-gelatin coacervates generated by ionic
complexation in the presence of a nonionic polysaccharide.},
journal = {Journal of colloid and interface science},
volume = {711},
issn = {0021-9797},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {DZNE-2026-00196},
pages = {140031},
year = {2026},
abstract = {DNA-protein coacervate microparticles can be formed via
ionic complexation between DNA and a protein, facilitated by
the presence of a nonionic polymer. Despite recent advances
in understanding membraneless organelles (MLOs) in
eukaryotic cells, their formation through liquid-liquid
phase separation remains incompletely elucidated. We
hypothesized that due to their opposite charges, DNA and
gelatin readily form micron-sized coacervates, and particle
formation is facilitated by adding a polymer immiscible with
gelatin.Formation of coacervate microparticles was essayed
in the model system composed of an anionic protein
(gelatin), a nonionic polysaccharide (dextran) and DNA from
salmon testes. The gelatin-dextran system was chosen because
these biopolymers exhibit a broad immiscibility region in
their phase diagram, and can form water-in-water emulsions.
Particle size was studied as a function of composition
parameters, and molecular interactions were evaluated by
rheology.Microparticles mainly composed of gelatin and DNA
were successfully synthesized, while dextran remained
predominantly in the continuous phase. Particle formation
was driven by electrostatic interactions between positively
charged gelatin and negatively charged DNA, further
facilitated by the immiscibility between gelatin and
dextran. Rheological analyses confirmed that these spherical
particles are indeed microgels, exhibiting high viscosity,
pseudoplastic behavior and significant cohesive energy,
driven by electrostatic gelatin-DNA interactions.
Additionally, particle size could be finely tuned by
adjusting the concentrations of the biopolymers.},
keywords = {Coacervates (Other) / DNA (Other) / Dextran (Other) /
Gelatin (Other) / Liquid-liquid phase separation (Other) /
Microgels (Other)},
cin = {AG Rodriguez-Muela},
ddc = {540},
cid = {I:(DE-2719)1713001},
pnm = {352 - Disease Mechanisms (POF4-352)},
pid = {G:(DE-HGF)POF4-352},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:41678882},
doi = {10.1016/j.jcis.2026.140031},
url = {https://pub.dzne.de/record/285254},
}