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Hernandez-Leon A, Fernández-Guasti A, Martínez A, Pellicer F, González-Trujano ME. Sleep architecture is altered in the reserpine-induced fibromyalgia model in ovariectomized rats. Behav Brain Res 2018; 364:383-392. [PMID: 29326058 DOI: 10.1016/j.bbr.2018.01.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 12/11/2017] [Accepted: 01/06/2018] [Indexed: 10/18/2022]
Abstract
Fibromyalgia (FM) is a musculoskeletal chronic pain syndrome with various concomitant symptoms like sleep disorders. FM patients are mainly women and menopause might play an important role in the altered processing of somatosensory information. Adverse effects and moderated efficacy of drugs promote treatment discontinuation by patients. Animal models of FM report pain and depression-like behaviors, but none of them have explored sleep disturbance as possible marker in the preclinic diagnostic. The aim of this study was to investigate alterations of the sleep architecture in the reserpine (RES)-induced FM model in ovarectomized (OVX) rats. The behavioral thresholds of nociceptive response in the experimental FM were analyzed in a first block using muscle pressure, tactile response and allodynia to cold stimulus. In a second block, the sleep-wake cycle was examined in a polysomnographic study. Groups (n = 8) consisted in: (a) no treatment, (b) RES vehicle, (c) RES alone, (d) RES + vehicle of fluoxetine (FLX, antidepressant reference drug), and (e) RES + FLX. Our results demonstrated that RES induced pain-related behavior (50-70%) in OVX rats and altered sleep architecture by the increase of total wake time (38%), diminution of the no-REM stage (SWS-I 33% and SWS-II 76%), and abolition of the REM sleep, effects that were partially reverted in the presence of FLX. In conclusion, our results support the face validity of the RES-induced pain-related behavior as FM model showing nociceptive behavioral responses associated to sleep alterations observed as symptoms in FM patients; thus, these evidences substantiate its usefulness to look for alternatives of treatment for FM symptoms.
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Affiliation(s)
- Alberto Hernandez-Leon
- Department of Research in Neurosciences, National Institute of Psychiatry "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. Sn Lorenzo Huipulco, 14370, D. F. México, Mexico; Department of Pharmacobiology, Center for Research and Advanced Studies (CINVESTAV) of the National Polytechnic Institute, Calz. De los Tenorios No. 235, Col. Granjas Coapa, C.P. 14330, D. F. México, Mexico
| | - Alonso Fernández-Guasti
- Department of Pharmacobiology, Center for Research and Advanced Studies (CINVESTAV) of the National Polytechnic Institute, Calz. De los Tenorios No. 235, Col. Granjas Coapa, C.P. 14330, D. F. México, Mexico
| | - Adrián Martínez
- Department of Research in Neurosciences, National Institute of Psychiatry "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. Sn Lorenzo Huipulco, 14370, D. F. México, Mexico
| | - Francisco Pellicer
- Department of Research in Neurosciences, National Institute of Psychiatry "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. Sn Lorenzo Huipulco, 14370, D. F. México, Mexico
| | - María Eva González-Trujano
- Department of Research in Neurosciences, National Institute of Psychiatry "Ramón de la Fuente Muñiz", Calz. México-Xochimilco 101, Col. Sn Lorenzo Huipulco, 14370, D. F. México, Mexico.
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