Effects of nocturnal light exposure and liver denervation on Per1, 2 and 3 gene expression.

<p>Effects of a 1 h light exposure at either CT14 or CT20 on mRNA levels of peripheral clock gene were studied in different organs of liver-intact and liver-denervated groups. Gray bars represent the non light-exposed control group (n = 8 at CT14 and n = 6 at CT20) and white bars represent the light-exposed group (n = 9 at CT14 and n = 6 at CT20). Hatched bars represent the liver denervated groups (non light-exposed group, n = 4, light- exposed group CD, n = 6). Each value is the mean±S.E.M. * P<0.05, ** P<0.01, *** P<0.005, compared to the respective non-light-exposed control group; ∧ P<0.05, ∧∧ P<0.01, ∧∧∧ P<0.005, compared to the control group at CT15.