(A) Quantitative RT-PCR kinetic analysis of Nr1d1 mRNA in blood monocytes isolated from ArntlLoxP/LoxP and ArntlLoxP/LoxPLyz2Cre mice kept on a 12 hour light-dark cycle (n = 3-4 samples per genotype and time point). (B to D) Ly6Chi monocyte numbers in blood (B), spleen (C), and bone marrow (D) of ArntlLoxP/LoxP and ArntlLoxP/LoxPLyz2Cre mice kept under a 12 hour light-dark cycle at various ZTs. (n = 5 mice per genotype and time point). (E) Survival curves of ArntlLoxP/LoxP and ArntlLoxP/LoxPLyz2Cre mice after infection with 1×106 L. monocytogenes at ZT0 and ZT8 (n = mice 10-11 per genotype and time point). (F to I) Serum concentrations of IL1β (F), IL6 (G), IFNγ (H), and CCL2 (I) in ArntlLoxP/LoxP and ArntlLoxP/LoxPLyz2Cre mice 2 dpi with 1×106 L. monocytogenes at ZT0 and ZT8 (n = mice 4-6 per genotype and time point). Pooled data (A and E) and representative (B to D) of two to three independent experiments are shown as mean ± SEM and analyzed using two-tailed Student's t-tests (A to D, and F to I), and log-rank test (E). *P<0.05; **P<0.01; ***P<0.001.