Taiwo OB, Russell IJ, Mignot E, Lin L, Michalek JE, Haynes W, Xiao Y, Zeitzer JM, Larson AA. Normal cerebrospinal fluid levels of hypocretin-1 (orexin A) in patients with fibromyalgia syndrome.
Sleep Med 2007;
8:260-5. [PMID:
17369087 DOI:
10.1016/j.sleep.2006.08.015]
[Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2006] [Revised: 08/07/2006] [Accepted: 08/28/2006] [Indexed: 12/24/2022]
Abstract
BACKGROUND
The hypothalamic neuropeptide hypocretin (orexin) modulates sleep-wake, feeding and endocrine functions. Cerebrospinal fluid (CSF) hypocretin-1 (Hcrt-1) concentrations are low in patients with narcolepsy-cataplexy, a sleep disorder characterized by hypersomnolence and rapid eye movement (REM) sleep abnormalities.
METHODS
We determined CSF Hcrt-1 concentrations of patients with the fibromyalgia syndrome (FMS), a condition characterized by fatigue, insomnia and in some cases daytime hypersomnolence.
RESULTS
Basal CSF levels of Hcrt-1 in FMS did not differ from those in healthy normal controls.
CONCLUSIONS
These findings suggest that abnormally low Hcrt-1 is not a likely cause of fatigue in FMS.
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