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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 ...
In up to 10% of cases there is a family history of the disorder. Family history is more common in narcolepsy with cataplexy. [1] There is a strong link with certain genetic variants, [27] which may make T-cells susceptible to react to the orexin-releasing neurons (autoimmunity) [30] after being stimulated by infection with H1N1 influenza. [12]
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 ...
[9] [7] [10] [8] It acts as a selective dual antagonist of the orexin receptors OX 1 and OX 2. [9] [10] [8] Daridorexant has a relatively short elimination half-life of 8 hours and a time to peak of about 1 to 2 hours. [1] [7] [5] It is not a benzodiazepine or Z-drug and does not interact with GABA receptors, instead having a distinct mechanism ...
Cataplexy is the first symptom to appear in about 10% of cases of narcolepsy, [2] caused by an autoimmune destruction of hypothalamic neurons that produce the neuropeptide hypocretin (also called orexin), which regulates arousal and has a role in stabilization of the transition between wake and sleep states. [3]
Orexin receptor type 2 (Ox2R or OX 2), also known as hypocretin receptor type 2 (HcrtR2), is a protein that in humans is encoded by the HCRTR2 gene. [5] It should not be confused for the protein CD200R1 which shares the alias OX2R but is a distinct, unrelated gene located on the human chromosome 3.
Before iron deficiency anemia sets in, “the body will do everything it can to retain the right number of red blood cells. So, it will deplete the storage iron before it depletes the red blood ...
SB-334867 is an orexin antagonist.It was the first non-peptide antagonist developed that is selective for the orexin receptor subtype OX 1, with around 50x selectivity for OX 1 over OX 2 receptors. [1]
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