Recent evidence suggests that ageing-related diseases could result in an accelerated loss of self-renewal capability of adult stem cells, normally involved in replacing damaged cellular elements. In previous works, we highlighted that a specific treatment, named tissue optimization-regenerative (TO-RGN), of radio-electric asymmetric conveyer (REAC) technology, influenced gene expression profiles controlling stem cell differentiation and pluripotency of human skin-derived fibroblasts in vitro. The purpose of the present work was to verify whether TO-RGN may also be effective in counteracting the expression of the senescence marker beta-galactosidase and of senescence-associated gene expression patterning, engaged during prolonged culture of human adipose-derived stem cells (hADSCs). Following TO-RGN exposure, we observed a significant downregulation in beta-galactosidase staining and in the expression of the senescence mediator genes p16INK4, ARF, p53, and p21(CIP1). Moreover, differently formed untreated cells, TO-RGN-exposed hADSCs maintained their typical fibroblast-like morphology and exhibited a multilineage potential even at late passages, as shown by the remarkable preservation of commitment to osteogenic, adipogenic, chondrogenic, and vasculogenic fates, both at morphologic and gene expression levels. In conclusion, our study highlights a positive effect of TO-RGN in counteracting degenerative senescence processes in vitro.
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