AQP1 mRNA levels after LXR agonist treatment. After 7 days of LXR agonist (T2320 Sigma–Aldrich) treatment (20 mg/kg), AQP1 mRNA relative expression, quantified with real-time RT-PCR, is significantly increased. Values of vehicle-treated mice were taken as 1, and T2320-treated mouse values are expressed relative to vehicle. Data represent the mean ± SE. *, P < 0.05 versus vehicle.