To investigate the potential causal associations between 3 common subjective sleep problems, daytime sleepiness, insomnia, and sleep apnea, and epigenetic age acceleration.
A two-sample Mendelian randomization (MR) study was conducted the publicly available genome-wide association study (GWAS) data to assess the causal effects of self-reported sleep problems on 4 indicators of epigenetic age acceleration, including intrinsic epigenetic age acceleration (IEAA), GrimAge acceleration, HannumAge acceleration, and PhenoAge acceleration. The primary analytical method was inverse-variance weighting (IVW), supplemented by sensitivity analyses using MR-Egger regression and the weighted median (WM) method to examine the robustness of the findings.
IVW showed that daytime sleepiness was significantly positively associated with IEAA (β=1.83, 95%CI: 0.17~2.49, P=0.031) and HannumAge acceleration (β=1.81, 95%CI: 0.21~2.42, P=0.027), suggesting a potential accelerating effect on epigenetic aging. Insomnia also showed significant positive associations with IEAA (β=1.57, 95%CI: 0.40~2.73, P=0.009) and GrimAge acceleration (β=1.37, 95%CI: 0.18~2.56, P=0.024). No significant causal relationship was observed between sleep apnea and any indicator of epigenetic age acceleration (P>0.05).
Daytime sleepiness and insomnia may accelerate epigenetic aging, indicating their potential biological role in the aging process. The impact of sleep apnea remains unclear and warrants further investigation.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |