Article Dans Une Revue Journal of Physical Chemistry B Année : 2007

PEO-PPO block copolymer vectors do not interact directly with DNA but with lipid membranes

Jocelyne Gau-Racine
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Jyotsana Lal
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Loïc Auvray
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Résumé

Small angle neutron (SANS) and light scattering was used to study the interaction between fragments of double stranded deoxyribonucleic acid (DNA) and a synthetic triblock [poly(ethylene oxide)-poly (propylene oxide)-poly (ethylene oxide)] amphiphilic polymer, known as L64, a potential vector for gene therapy. The mechanism of action of this vector is yet unknown. The contrast variation method was used to separate the partial structure factors of the different components in mixtures of triblock and DNA. It has been found that the copolymer and DNA molecules exhibit repulsive interactions. Further, the interaction between the copolymer and a model lipid membrane was investigated in order to explain the action of the vector. Electrical measurements on black lipid membranes indicated that the main effect of L64 as a vector is to permeabilize the cell's membrane.

Dates et versions

hal-04896975 , version 1 (20-01-2025)

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Citer

Jocelyne Gau-Racine, Jyotsana Lal, Mehdi Zeghal, Loïc Auvray. PEO-PPO block copolymer vectors do not interact directly with DNA but with lipid membranes. Journal of Physical Chemistry B, 2007, 111 (33), pp.9900-9907. ⟨10.1021/jp0687302⟩. ⟨hal-04896975⟩
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