• Welcome to Phoenix Rising!

    Created in 2008, Phoenix Rising is the largest and oldest forum dedicated to furthering the understanding of, and finding treatments for, complex chronic illnesses such as chronic fatigue syndrome (ME/CFS), fibromyalgia, long COVID, postural orthostatic tachycardia syndrome (POTS), mast cell activation syndrome (MCAS), and allied diseases.

    To become a member, simply click the Register button at the top right.

Regarding sleep and Orexin (the Hormone of Waking up)

redaxe

Senior Member
Messages
230
Does anyone know if there are any lab tests that measure Orexin levels in the brain?

And are there any replacement therapies or targeted drugs that can mimic the effect of Orexin in the brain to stimulate wakefulness.

Orexin, also called hypocretin, is a neuropeptide that regulates arousal, wakefulness, and appetite.[1] The most common form of narcolepsy, in which the sufferer briefly loses muscle tone (cataplexy), is caused by a lack of orexin in the brain due to destruction of the cells that produce it.
 

halcyon

Senior Member
Messages
2,482
I believe modafinil is thought to act on orexin producing neurons. There's no replacement therapy available yet as far as I know. Orexin can't cross the blood brain barrier I don't think.
 

redaxe

Senior Member
Messages
230
I believe modafinil is thought to act on orexin producing neurons. There's no replacement therapy available yet as far as I know. Orexin can't cross the blood brain barrier I don't think.

Thanks - that's what I thought. I suspect that once we get an orexin replacement that may be a good treatment for some subtypes or symptoms of ME/CFS.