(E) RT-qPCR quantification of relative miR-21-3p level in the epidermis of Ppard +/+ and -/-mice, acutely irradiated (Ac-UV; +) or non-irradiated (-), treated with the PPAR/ antagonist GSK0660 (+) or vehicle (-), as indicated. miR-21-3p: Ppard +/+ no UV vs Ppard +/+ Ac-UV P = 0.005, Ppard +/+ Ac-UV vs Ppard +/+ Ac-UV/GSK0660 P = 0.04, N=5 (Ppard +/+) to 3 (Ppard -/-) animals per group. One representative experiment is shown out of two independent replicates 