Abstract
Background: Vitamin D exerts multiple pleiotropic effects beyond its role in calcium-phosphate metabolism. Growing evidence suggests an association between hypovitaminosis D and sleep disorders, thus increasing the interest in the role of this vitamin in the regulatory mechanisms of the sleep-wake cycle.
Objective: The study aimed to explore and summarize the current knowledge about the role of vitamin D in sleep regulation and the impact of vitamin D deficiency on sleep disorders.
Methods: The main regulatory mechanisms of vitamin D on sleep are explained in this study. The literature was scanned to identify clinical trials and correlation studies showing an association between vitamin D deficiency and sleep disorders.
Results: Vitamin D receptors and the enzymes that control their activation and degradation are expressed in several areas of the brain involved in sleep regulation. Vitamin D is also involved in the pathways of production of Melatonin, the hormone involved in the regulation of human circadian rhythms and sleep. Furthermore, vitamin D can affect sleep indirectly through non-specific pain disorders, correlated with alterations in sleep quality, such as restless legs syndrome and obstructive sleep apnea syndrome.
Conclusion: Vitamin D has both a direct and an indirect role in the regulation of sleep. Although vitamin D deficiency has been associated to sleep disorders, there is still scant evidence to concretely support the role of vitamin D supplementation in the prevention or treatment of sleep disturbances; indeed, more intervention studies are needed to better clarify these aspects.
Keywords: Sleep, vitamin D, sleep regulation, sleep disturbance, sleep disorders, sun.
[http://dx.doi.org/10.5664/jcsm.2266] [PMID: 23243403]
[PMID: 23558409]
[http://dx.doi.org/10.1007/s13760-015-0474-4] [PMID: 25904436]
[http://dx.doi.org/10.5665/sleep.5430] [PMID: 26414899]
[http://dx.doi.org/10.1111/nyas.13219] [PMID: 27649525]
[PMID: 1459048]
[http://dx.doi.org/10.1016/S0166-2236(97)01209-5]
[http://dx.doi.org/10.1155/2015/904967] [PMID: 26090221]
[http://dx.doi.org/10.1007/BF00496810] [PMID: 2828283]
[http://dx.doi.org/10.1016/j.vascn.2004.09.001] [PMID: 15596112]
[http://dx.doi.org/10.1007/BF00315874] [PMID: 1333462]
[http://dx.doi.org/10.1016/0306-4522(92)90272-4] [PMID: 1321365]
[http://dx.doi.org/10.1016/j.jchemneu.2004.08.006] [PMID: 15589699]
[http://dx.doi.org/10.1016/S1364-6613(02)01992-7]
[http://dx.doi.org/10.1164/rccm.200201-050OC] [PMID: 12421746]
[http://dx.doi.org/10.1002/cne.1040] [PMID: 11406822]
[http://dx.doi.org/10.1093/brain/awt329]
[http://dx.doi.org/10.1016/S0006-8993(98)01008-7]
[http://dx.doi.org/10.1371/journal.pone.0000513] [PMID: 17551593]
[http://dx.doi.org/10.1111/apha.12487]
[http://dx.doi.org/10.1007/s00418-008-0540-6]
[http://dx.doi.org/10.1016/j.psyneuen.2019.05.010] [PMID: 31132568]
[http://dx.doi.org/10.1016/S1043-2760(01)00547-1] [PMID: 11893522]
[http://dx.doi.org/10.1056/NEJMra070553] [PMID: 17634462]
[http://dx.doi.org/10.1177/2156587215580491] [PMID: 25878189]
[http://dx.doi.org/10.1146/annurev-physiol-021909-135821]
[http://dx.doi.org/10.3390/ijms19082245] [PMID: 30065237]
[http://dx.doi.org/10.3389/fendo.2019.00249] [PMID: 31057485]
[http://dx.doi.org/10.1096/fj.14-269811] [PMID: 26071405]
[http://dx.doi.org/ 10.1016/j.bbi.2013.04.010]
[http://dx.doi.org/10.4103/atm.ATM_301_16] [PMID: 28469721]
[http://dx.doi.org/10.1016/j.sleep.2007.07.007] [PMID: 17804292]
[http://dx.doi.org/10.1093/sleep/30.9.1145] [PMID: 17910386]
[http://dx.doi.org/10.1161/01.CIR.0000052627.99976.18] [PMID: 12615790]
[http://dx.doi.org/10.1079/BJN2003837] [PMID: 12720576]
[http://dx.doi.org/10.1097/AJP.0b013e318255655d] [PMID: 22699141]
[http://dx.doi.org/10.1161/HYPERTENSIONAHA.110.160929] [PMID: 21115878]
[http://dx.doi.org/10.1301/nr.2007.aug.S113-S115] [PMID: 17867384]
[http://dx.doi.org/10.1016/B978-0-444-52006-7.00015-0] [PMID: 21056190]
[http://dx.doi.org/10.1016/j.sleep.2006.10.005] [PMID: 17512779]
[http://dx.doi.org/10.1186/s40557-017-0187-7] [PMID: 28652922]
[http://dx.doi.org/10.5665/sleep.4408] [PMID: 25581929]
[http://dx.doi.org/10.3390/nu9020139] [PMID: 28216568]
[http://dx.doi.org/10.3390/nu9040340] [PMID: 28353643]
[http://dx.doi.org/10.1016/j.jcma.2015.06.017] [PMID: 26391786]
[http://dx.doi.org/10.5665/sleep.4914] [PMID: 25669179]
[http://dx.doi.org/10.21215/kjfp.2016.6.6.586]
[http://dx.doi.org/10.1371/journal.pone.0020433] [PMID: 21633708]
[http://dx.doi.org/10.1016/j.sleep.2016.05.008] [PMID: 28153207]
[http://dx.doi.org/10.1007/s11325-018-1751-2] [PMID: 30430372]
[http://dx.doi.org/10.1016/j.sleep.2012.04.009] [PMID: 22704399]
[http://dx.doi.org/10.1183/20734735.000618] [PMID: 30186518]
[http://dx.doi.org/10.1007/s00421-019-04104-x] [PMID: 30830277]
[http://dx.doi.org/10.1007/s001980200012] [PMID: 11991436]
[http://dx.doi.org/10.4103/0972-2327.138505] [PMID: 25221399]
[http://dx.doi.org/10.1378/chest.07-0040] [PMID: 17625094]
[http://dx.doi.org/10.1016/S2213-2600(17)30306-5] [PMID: 28986128]