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Orexin (/ ɒ ˈ r ɛ k s ɪ n /), also known as hypocretin, is a neuropeptide that regulates arousal, wakefulness, and appetite. [5] It exists in the forms of orexin-A and orexin-B.The most common form of narcolepsy, type 1, in which the individual experiences brief losses of muscle tone ("drop attacks" or cataplexy), is caused by a lack of orexin in the brain due to destruction of the cells ...
Orexin, otherwise known as hypocretin, is a neuropeptide that acts within the brain to regulate appetite and wakefulness as well as a number of other cognitive and physiological processes. [27] [38] [39] Loss of these orexin-producing neurons causes narcolepsy and most individuals with narcolepsy have a reduced number of these neurons in their ...
Several drugs [7] acting on the orexin system are under development, either orexin agonists for the treatment of conditions such as narcolepsy, or orexin antagonists for insomnia. In August 2015, Nagahara et al. published their work in synthesizing the first HCRT/OX2R agonist, compound 26, with good potency and selectivity. [8]
After discovering orexin, which can be used to control a receptor for a sleep neurotransmitter, Mignot came to the conclusion that the cause of the disorder was a disruption of orexin, according ...
Suvorexant, sold under the brand name Belsomra, is an orexin antagonist medication which is used in the treatment of insomnia. [2] [6] It is indicated specifically for the treatment of insomnia characterized by difficulties with sleep onset and/or maintenance in adults. [2] [6] Suvorexant helps with falling asleep faster, sleeping longer, being ...
Emmanuel Mignot (born 1959 in Paris) is a sleep researcher and director of the Stanford Center for Sleep Sciences and Medicine, at Stanford University. Dr. Mignot is an authority on sleep research and medicine, and is mostly known for his work on narcolepsy. He is the Craig Reynolds Professor of Sleep Medicine at Stanford Medical School ...
An orexin receptor antagonist, or orexin antagonist, is a drug that inhibits the effect of orexin by acting as a receptor antagonist of one (selective orexin receptor antagonist or SORA) or both (dual orexin receptor antagonis or DORA) of the orexin receptors, OX 1 and OX 2. [ 1] Medical applications include treatment of sleep disorders such as ...
Treatment for narcolepsy and cataplexy can be divided to those that act on the excessive daytime sleepiness (EDS) and those that improve cataplexy. Most patients require lifelong use of medications. [15] Most treatments in humans will act only symptomatically and do not target the loss of the orexin-producing neurons. [16]
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