The Endocannabinoid N-arachidonoyl Dopamine is Critical for Hyperalgesia Induced by Chronic Sleep Disruption
Overview
Authors
Affiliations
Chronic pain is highly prevalent and is linked to a broad range of comorbidities, including sleep disorders. Epidemiological and clinical evidence suggests that chronic sleep disruption (CSD) leads to heightened pain sensitivity, referred to as CSD-induced hyperalgesia. However, the underlying mechanisms are unclear. The thalamic reticular nucleus (TRN) has unique integrative functions in sensory processing, attention/arousal and sleep spindle generation. We report that the TRN played an important role in CSD-induced hyperalgesia in mice, through its projections to the ventroposterior region of the thalamus. Metabolomics revealed that the level of N-arachidonoyl dopamine (NADA), an endocannabinoid, was decreased in the TRN after CSD. Using a recently developed CB1 receptor (cannabinoid receptor 1) activity sensor with spatiotemporal resolution, CB1 receptor activity in the TRN was found to be decreased after CSD. Moreover, CSD-induced hyperalgesia was attenuated by local NADA administration to the TRN. Taken together, these results suggest that TRN NADA signaling is critical for CSD-induced hyperalgesia.
The endocannabinoid system in the brain undergoes long-lasting changes following neuropathic pain.
Zhang M, Wang T, Meng F, Jiang M, Wu S, Xu H iScience. 2024; 27(12):111409.
PMID: 39717086 PMC: 11664153. DOI: 10.1016/j.isci.2024.111409.
Yeh Y, Hsu H, Lin M, Chen T, Lin W, Huang H Life (Basel). 2024; 14(11).
PMID: 39598297 PMC: 11595423. DOI: 10.3390/life14111499.
Sun H, Shen S, Thomas R, Westover M, Zhang C Neural Regen Res. 2024; 20(6):1711-1712.
PMID: 39104106 PMC: 11688547. DOI: 10.4103/NRR.NRR-D-24-00351.
Wang L, Yang Z, Satoshi F, Prasanna X, Yan Z, Vihinen H Nat Commun. 2024; 15(1):6209.
PMID: 39043703 PMC: 11266426. DOI: 10.1038/s41467-024-50565-w.
[Quality of life and sleep quality in patients with chronic pruritus].
Mann C, Staubach P Dermatologie (Heidelb). 2024; 75(8):612-616.
PMID: 38914832 DOI: 10.1007/s00105-024-05373-0.