1. Activation of miR‐21‐3p by PPARβ/δ requires activation of the TGFβ receptor
Activation of miR‐21‐3p by PPARβ/δ requires activation of the TGFβ receptor RT–qPCR quantification of relative pri‐miR‐21 level in HaCaT human keratinocytes treated with the PPARβ/δ agonist GW0742 (+) or vehicle (−), with (+) or without (−) cycloheximide (Cyclo) as indicated. Pri‐miR‐21: Veh vs. GW0742 P =  N = 3 biological replicates, one representative experiment is shown out of two independent replicates.RT–qPCR quantification of relative pri‐miR‐21, pre‐miR‐21, miR‐21‐5p, and miR‐21‐3p levels in HaCaT cells treated for 24 h with 2 or 5 ng/ml of recombinant human TGFβ1 (+) or vehicle (−) as indicated. Pri‐miR‐21: Veh vs. TGFβ1 5 ng/ml P = 0.029; Pre‐miR‐21: Veh vs. TGFβ1 5 ng/ml P = 0.001; miR‐21‐5p: Veh vs. TGFβ1 5 ng/ml P = 0.002; miR‐21‐3p: Veh vs. TGFβ1 5 ng/ml P = 1.7E‐05. N = 3 biological replicates, one representative experiment is shown out of two independent replicates.RT–qPCR quantification of pri‐miR‐21, pre‐miR‐21, miR‐21‐5p, and miR‐21‐3p levels in HaCat cells treated for 24 h with the PPARβ/δ agonist GW0742 (+), TGFβ receptor inhibitor SB (+), or vehicle (−) as indicated. Pri‐miR‐21: GW0742 vs. SB P = 0.004, GW0742 vs. GW0742/SB P = 0.015; Pre‐miR‐21: Veh vs. GW0742 P = 0.022, GW0742 vs. SB P = 0.036, GW0742 vs. GW0742/SB P = 0.024; miR‐21‐5p: GW0742 vs. SB P = 0.034, GW0742 vs. GW0742/SB P = 0.024; miR‐21‐3p: Veh vs. GW0742 P = 0.036, GW0742 vs. SB P = 0.011, GW0742 vs. GW0742/SB P =  N = 3 biological replicates, one representative experiment is shown out of two independent replicates.RT–qPCR quantification of relative Tgfb1 level in the epidermis of acutely irradiated (Ac‐UV; +) and non‐irradiated (−) Ppard+/+ and Ppard−/− mice. Tfgb1: Ppard+/+ no UV vs. Ac‐UV P = 0.034, Ppard+/+ Ac‐UV vs. Ppard−/− Ac‐UV P =  N = 2–3 animals per group, one representative experiment is shown out of three independent replicates.RT–qPCR quantification of relative miR‐21‐5p and miR‐21‐3p levels in the skin of Ppard+/+ mice treated with the TGFβ receptor inhibitor SB (+) or vehicle (−), with (+) or without (−) acute UV exposure (Ac‐UV). miR‐21‐5p: no UV vs. Ac‐UV P = 0.038, Ac‐UV vs. Ac‐UV/SB P = 0.028; miR‐21‐3p: no UV vs. Ac‐UV P = 0.017; Ac‐UV vs. Ac‐UV/SB P =  N = 3 animals per group, one representative experiment is shown out of three independent replicates.Data information: Results are presented as mean values ± SEM. The statistical comparison between groups was performed by using t‐test. *P‐value < 0.05; **P‐value < 0.01.
Gwendoline Degueurce et al. EMBO Mol Med. 2016;emmm
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