RIP140 absence reduces the basal expression of clock genes. (A) mRNA
level of different clock genes in the liver and anterior hypothalamus
(AHT) of wild-type (WT) and RIP140 knockout (KO) mice. Samples were
collected at ZT2 (2 hours after lights are turned on), and mRNA was
extracted and quantified by RT-QPCR. Bars represent mean ± SEM.
*p < 0.05,
**p < 0.01, and
***p < 0.001 versus
control. Student t test (n = 6). (B)
mRNA levels of clock genes in HepG2 human liver cell lines depleted of
RIP140 quantified by RT-QPCR. RIP140 knockdown cells (shRIP) were
generated by stably transfecting HepG2 cells with a vector expressing
RIP140-specific shRNA. HepG2 cells constitutively expressing a
nonspecific scrambled shRNA (scr) were used as a control. (Inset)
Western blot showing RIP140 expression in the different cell lines. Bars
represent mean ± SEM (n = 6).
*p < 0.05,
**p < 0.01, and
***p < 0.001 versus
control. Student t test. (C) mRNA levels of clock genes
in HuH7 human liver cells transiently transfected with a RIP140
expressing vector or equal amounts of an eGFP expressing vector. Bars
represent mean ± SEM (n = 3).
*p < 0.05 and
**p < 0.01 versus control.
Student t test.