Ensembles des articles, publications et posters de Bioalternatives traitant du vieillissement cutané et des modèles in vitro et ex vivo développés.

in vitro modeling of skin photoaging: development of evaluation tools for cosmetics

Development of in vitro models skin for better understand the modifications during photo-aging induced by repetitive UV exposure.

Development of a new model of reconstructed aged skin useful to study Antiageing effects of cosmetic compounds

The development of new anti-aging products needs performant in vitro models mimicking morphological changes and physiological modifications appearing during skin aging. In order to have access to a simple model mimicking the epidermis ageing but in relation with a normal dermis, we have developed a new in vitro model of reconstructed skin comprising an aged epidermis covering a reconstructed dermis built with collagen and normal (young) fibroblasts.
C-xyloside

Effect of C-xyloside on morphogenesis of the dermal epidermal junction in aged female skin. An ultrastuctural pilot study

These data suggest that topical C-xyloside application in vivo may be efficient in inducing a better dermal-epidermal cohesion when such a junction is deficient, as is the case in photo-aged or chronologically aged skin. Moreover, a statistically significant increase in CD44 expression was noted in the epidermis of C-xyloside-treated compared to the placebo treated skin areas.
Tensin1

Reduced expression of the adhesion protein tensin1 in cultured human dermal fibroblasts affects collagen gel contraction

tensin1 plays an important role in cell-matrix interaction and that a reduced expression might contribute to the dermal alterations observed during skin ageing