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Expression of senescence-associated ?-galactosidase (SA-?-Gal) by human skin fibroblasts, effect of advanced glycation end-products and fucose or rhamnose-rich polysaccharides

January 30th, 2009 by admin

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Abstract: Expression by cells of the SA-?-Gal was shown to be a reliable indicator of the switch mechanism used by cells to enter the senescent phenotype. We used this method in order to explore the variation of SA-?-Gal-positive cells with passage number and time spent in culture. Both parameters produced an increase of SA-?-Gal-positive cells. The addition of a Maillard-product (advanced glycation end-product=AGE) to the fibroblast cultures also increased SA-?-Gal expression. Fucose- and rhamnose-rich oligo- and polysaccharides (FROPs and RROPs, respectively) provided a significant protection against this AGE-induced increase of SA-?-Gal-positive cells. It is speculated that these processes might well play an important role in skin aging.

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