title: Effects of hypocretin/orexin cell transplantation on narcoleptic-like sleep behavior in rats.
abstract: The sleep disorder narcolepsy is now considered a neurodegenerative disease because there is a massive loss of neurons containing the neuropeptide hypocretin/orexin (HCRT). In consequence, narcoleptic patients have very low cerebrospinal fluid (CSF) levels of HCRT. Studies in animal models of narcolepsy have shown the neurophysiological role of the HCRT system in the development of this disease. For example, the injection of the neurotoxin named hypocretin-2-saporin (HCRT2/SAP) into the lateral hypothalamus (LH) destroys the HCRT neurons, therefore diminishes the contents of HCRT in the CSF and induces narcoleptic-like behavior in rats. Transplants of various cell types have been used to induce recovery in a variety of neurodegenerative animal models. In models such as Parkinson's disease, cell survival has been shown to be small but satisfactory. Similarly, cell transplantation could be employed to implant grafts of HCRT cells into the LH or even other brain regions to treat narcolepsy. Here, we report for the first time that transplantation of HCRT neurons into the LH of HCRT2/SAP-lesioned rats diminishes narcoleptic-like sleep behavior. Therefore, cell transplantation may provide an effective method to treat narcolepsy.
authors.affiliation: Unidad de Trastornos del Movimiento y Sueño (TMS), Hospital General Dr. Manuel Gea González, Mexico City, Mexico; Unidad de Trastornos del Movimiento y Sueño (TMS), Hospital General Ajusco Medio, Mexico City, Mexico.
authors.forename: Oscar
authors.initials: O
authors.lastname: Arias-Carrión
authors.affiliation: Laboratorio de Neurociencias Moleculares e Integrativas, Escuela de Medicina, División Ciencias de la Salud, Universidad Anáhuac Mayab, Mérida, Yucatán, Mexico.
authors.forename: Eric
authors.initials: E
authors.lastname: Murillo-Rodríguez
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D017690:Cell Transplantation; D007031:Hypothalamus / Q000473:pathology; D047908:Intracellular Signaling Peptides and Proteins / Q000378:metabolism*; D008297:Male; D009290:Narcolepsy / Q000473:pathology / Q000503:physiopathology / Q000628:therapy*; D009474:Neurons / Q000378:metabolism* / Q000637:transplantation*; D009479:Neuropeptides / Q000378:metabolism*; D000068797:Orexins; D051381:Rats; D017208:Rats, Wistar; D012890:Sleep; D014851:Wakefulness
chemical_list: D047908:Intracellular Signaling Peptides and Proteins; D009479:Neuropeptides; D000068797:Orexins
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