Clock Gene Expression is Altered in Veterans with Sleep Apnea.

Clock Gene Expression is Altered in Veterans with Sleep Apnea. Physiol Genomics. 2019 Jan 18;: Authors: Canales MT, Holzworth MR, Bozorgmehri S, Ishani A, Weiner ID, Berry RB, Beyth RJ, Gumz ML Abstract Clock gene dysregulation has been shown to underlie various sleep disorders and may lead to negative cardio-metabolic outcomes. However, the association between sleep apnea(SA) and core clock gene expression is unclear. We performed a cross-sectional analysis of 49 Veterans enrolled in a study of SA outcomes in Veterans with chronic kidney disease, not selected for SA or sleep complaints. All participants underwent full polysomnography and next morning whole blood collection for clock gene expression. We defined SA as an apnea-hypopnea index (AHI)≥15 events/hour; nocturnal hypoxemia(NH) was defined as ≥10% of total sleep time spent at <90% oxygen saturation. We used quantitative real-time PCR to compare the relative gene expression of clock genes between those with and without SA or NH. Clock genes studied were Bmal1, Ck1δ, Ck1ε, Clock, Cry1, Cry2, NPAS2, Per1, Per2, Per3, Rev-Erb-α, RORα, and Timeless. Our cohort was 90% male, mean age was 7111 years, mean BMI was 30±5, 41% had SA and 27% had NH. Compared to those without SA, Per3 expression was reduced by 35% in SA (p=0.027). Compared to those without NH, NPAS2, Per1, and Rev-Erb-α expression were reduced in NH (50.4%,p=0.027; 28.7%,p=0.014; 31%,p=0.040, respectively). ...
Source: Physiological Reviews - Category: Physiology Authors: Tags: Physiol Genomics Source Type: research