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Baillargues, France

Mouri A.,Charles Gerhardt Institute | Mouri A.,Medesis Pharma SA | Diat O.,CNRS Marcoule Institute for Separative Chemistry | El Ghzaoui A.,Montpellier University | And 5 more authors.
Journal of Colloid and Interface Science | Year: 2015

The phase behavior of the four-components Peceol®/lecithin/ethanol/water system has been studied in a part of the phase diagram poor in water and varying the lecithin/Peceol® ratio. Using several complementary techniques such as Karl Fischer titration, rheology, polarized microscopy and SAXS measurements several nanostructures of the complex systems were identified. W/O microemulsion (L2) as well as an inverted hexagonal (H2) liquid-crystal phase were studied. The analysis of the different phase transitions allows us to understand the effect of lecithin on the water solubilization efficiency of this clear gel and to show its pharmaceutical interest among lecithin organogels. © 2015 Elsevier Inc. Source

Lehmann S.,Montpellier University | Lehmann S.,French National Center for Scientific Research | Relano-Gines A.,French National Center for Scientific Research | Resina S.,Medesis Pharma SA | And 15 more authors.
PLoS ONE | Year: 2014

One of the main challenges for neurodegenerative disorders that are principally incurable is the development of new therapeutic strategies, which raises important medical, scientific and societal issues. Creutzfeldt-Jakob diseases are rare neurodegenerative fatal disorders which today remain incurable. The objective of this study was to evaluate the efficacy of the down-regulation of the prion protein (PrP) expression using siRNA delivered by, a water-in-oil microemulsion, as a therapeutic candidate in a preclinical study. After 12 days rectal mucosa administration of Aonys/PrP-siRNA in mice, we observed a decrease of about 28% of the brain PrPC level. The effect of Aonys/PrP-siRNA was then evaluated on prion infected mice. Several mice presented a delay in the incubation and survival time compared to the control groups and a significant impact was observed on astrocyte reaction and neuronal survival in the PrP-siRNA treated groups. These results suggest that a new therapeutic scheme based an innovative delivery system of PrP-siRNA can be envisioned in prion disorders. © 2014 Lehmann et al. Source

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