| abstract |
Methods and compositions—particularly compositions containing β-carotene—for modulating the expression of genes that effect or influence cellular health or protect against cellular damage, e.g., skin aging, are provided. More particularly, a method is provided for screening for a compound that modulates an effect of UV irradiation on eukaryotic cells. Methods and compositions for ameliorating the effects of non-UV radiation induced skin aging and for modulating UVA-induced gene expression on skin aging are also provided. Further provided are methods and compositions for enhancing UVA-induced tanning of the skin, for promoting cell differentiation in UVA-irradiated cells of an organism, and for modulating stress-induced induction of a gene in an organism. |