Intranasal neuropeptide Y reduced cortisol and ACTH while promoting sleep in healthy young men, demonstrating anxiolytic and sleep-promoting effects that oppose the stress hormone CRH.
Sleep promoted, cortisol reducedIntranasal NPY simultaneously improved sleep and suppressed stress hormones, opposing CRH's effects on both systems
What the researchers found
Intranasal NPY promoted sleep and reduced ACTH and cortisol in healthy young men, demonstrating CRH-opposing anxiolytic and sedative effects with potential therapeutic applications for depression and insomnia.
Why it matters
Depression and insomnia involve CRH overactivity. If NPY can oppose CRH effects through a simple nasal spray, it could offer a fundamentally different approach to treating these common conditions without the side effects of current medications.
How the study worked
Randomized study in healthy young men. NPY administered intranasally. Sleep architecture (polysomnography), plasma ACTH, and cortisol measured over the study night compared to placebo.
What this study cannot tell us
Small study in healthy men only. Acute effects may not predict chronic therapeutic use. Intranasal peptide delivery is variable. Effects in patients with actual depression/insomnia not tested.
How to read the evidence
Moderate evidence from a controlled human study with objective sleep and hormonal measurements, though limited by small sample and acute design.
When this study was published
Published in 2000. NPY-based approaches for anxiety, depression, and PTSD continue to be explored, with intranasal delivery as a potential route.
The bigger picture
The CRH-NPY balance may be key to stress resilience. People with depression and PTSD may have too much CRH relative to NPY. Restoring this balance with exogenous NPY represents a novel therapeutic concept.
Questions still open
- Would intranasal NPY help patients with depression-related insomnia?
- Does chronic NPY administration maintain these effects?
- Is the cortisol reduction clinically significant for stress-related disorders?
Common questions
Could a nasal spray help with stress and sleep?
How does NPY relate to stress?
Read the original research
Neuropeptide Y promotes sleep and inhibits ACTH and cortisol release in young men.
Neuropharmacology, 39(8), 1474-81
Citation
Antonijevic, I A; Murck, H; Bohlhalter, S; Frieboes, R M; Holsboer, F; Steiger, A. (2000). Neuropeptide Y promotes sleep and inhibits ACTH and cortisol release in young men.. Neuropharmacology, 39(8), 1474-81.