Evaluation of periodic limb movements in a putative animal model of restless leg syndrome. 2012

Cleide Lopes, and Andrea M Esteves, and Roberto Frussa-Filho, and Sergio Tufik, and Marco Tulio de Mello
Department of Psychobiology, Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil.

Restless leg syndrome (RLS) is a major healthcare burden with increasing prevalence. It has been demonstrated that periodic limb movements (PLM) can occur as an isolated phenomenon, but they are often associated with this syndrome and are the only symptom of this disorder that can be measured electrophysiologically. The aim of this study was to examine the sleep-wake behavior and the presence of limb movement in a rat model of RLS induced by lesioning the A11 dopaminergic nuclei with the neurotoxin 6-hydroxydopamine (6-OHDA). Rats were implanted with electrodes for electrocorticography and electromyography. Sleep recordings were monitored during light/dark periods lasting 12 hours each and were evaluated on days 7, 15, and 28 after injection of the drug or phosphate-buffered saline (PBS). A control group that did not receive any injection was also included. Wakefulness percentages were generated for 4-hour segments of the dark period, yielding the following 3 bins: 7 PM to 11 PM, 11 PM to 3 AM, and 3 PM to 7 PM. Additionally, slow wave sleep, paradoxical sleep, wakefulness, and limb movements were evaluated over the entire 12 hours of the light/dark cycle. All A11-lesioned rats exhibited an increased percentage of wakefulness during the last block of the dark period, as would be expected for an animal model of this syndrome. In addition, at all time points after lesioning, these animals presented increased frequencies of limb movement during both the light and the dark periods. These alterations were reversed by the acute administration of the dopaminergic agonist pramipexole. This animal model strengthens the notion that 6-OHDA-induced A11 lesions can be a valid animal model for RLS and PLM.

UI MeSH Term Description Entries
D008297 Male Males
D009068 Movement The act, process, or result of passing from one place or position to another. It differs from LOCOMOTION in that locomotion is restricted to the passing of the whole body from one place to another, while movement encompasses both locomotion but also a change of the position of the whole body or any of its parts. Movement may be used with reference to humans, vertebrate and invertebrate animals, and microorganisms. Differentiate also from MOTOR ACTIVITY, movement associated with behavior. Movements
D012148 Restless Legs Syndrome A disorder characterized by aching or burning sensations in the lower and rarely the upper extremities that occur prior to sleep or may awaken the patient from sleep. Restless Leg Syndrome,Restless Legs,Willis Ekbom Disease,Willis Ekbom Syndrome,Willis-Ekbom Disease,Willis-Ekbom Syndrome,Wittmaack Ekbom Syndrome,Wittmaack-Ekbom Syndrome,Disease, Willis Ekbom,Disease, Willis-Ekbom,Syndrome, Restless Leg,Syndrome, Willis Ekbom,Syndrome, Willis-Ekbom,Syndrome, Wittmaack Ekbom,Syndrome, Wittmaack-Ekbom
D004195 Disease Models, Animal Naturally-occurring or experimentally-induced animal diseases with pathological processes analogous to human diseases. Animal Disease Model,Animal Disease Models,Disease Model, Animal
D004569 Electroencephalography Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain. EEG,Electroencephalogram,Electroencephalograms
D004576 Electromyography Recording of the changes in electric potential of muscle by means of surface or needle electrodes. Electromyogram,Surface Electromyography,Electromyograms,Electromyographies,Electromyographies, Surface,Electromyography, Surface,Surface Electromyographies
D005121 Extremities The farthest or outermost projections of the body, such as the HAND and FOOT. Limbs,Extremity,Limb
D000077487 Pramipexole A benzothiazole derivative and dopamine agonist with antioxidant properties that is used in the treatment of PARKINSON DISEASE and RESTLESS LEGS SYNDROME. 2-Amino-4,5,6,7-tetrahydro-6-propylaminobenzothiazole,2-Amino-6-propylaminotetrahydrobenzothiazole,4,5,6,7-Tetrahydro-N6-propyl-2,6-benzothiazole-diamine,6,7-Tetrahydro-N6-propyl-2,6-benzothiazolediamine dihydrochloride monohydrate,Mirapex,Pramipexol,Pramipexol Dihydrobromide, (+-)-isomer,Pramipexol Dihydrochloride, (S)-isomer,Pramipexol, (+-)-isomer,Pramipexole Dihydrochloride,Pramipexole Dihydrochloride Anhydrous,Pramipexole Hydrochloride Monohydrate,SND-919,Sifrol,2 Amino 6 propylaminotetrahydrobenzothiazole,SND 919
D000704 Analysis of Variance A statistical technique that isolates and assesses the contributions of categorical independent variables to variation in the mean of a continuous dependent variable. ANOVA,Analysis, Variance,Variance Analysis,Analyses, Variance,Variance Analyses
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

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