A neuropeptide that induces delta sleep, reduces stress, modulates hormone release, and exhibits antioxidant effects in various physiological processes.
Mikhaleva. I I II; Rikhireva. G T GT; Prudchenko. I A IA; Golubev. I N IN
The study shows that delta sleep‑inducing peptide (DSIP) and its active analogues can disturb the structure of cell membranes, especially in platelets, and that this membrane‑disordering matches how well the peptides work in live animals. Inactive versions don’t cause the same effect. The researchers think DSIP’s ability to change membrane dynamics may be part of why it helps with stress and sleep.
Koplik. E V EV; Umryukhin. P E PE; Konorova. I L IL; Terekhina. O L OL; Mikhaleva. I I II; Gannushki...
In rats, the peptide called delta sleep‑inducing peptide (DSIP) and a combo product named Deltaran (glycine + DSIP) activated brain cells in stress‑related areas, boosted blood flow to the brain, and dramatically improved survival after a stroke‑like injury.
Bondarenko. T I TI; Sorokina. I A IA; Mayboroda. E A EA; Durkanaeva. O A OA; Kutilin. D S DS; Mikhal...
A study in aging rats found that giving delta sleep‑inducing peptide (DSIP) under the skin once a month for five days helped protect proteins in several organs from oxidative damage and lowered blood sugar‑related protein changes. The effect varied by tissue, and the peptide also reduced the formation of glycated hemoglobin, a marker of high blood sugar.
Gannushkina. I V IV; Konorova. I L IL; Koplik. E V EV; Antelava. A L AL
In a rat study, the drug Deltaran (an antistress compound) helped protect the brain after a simulated stroke. It lowered slow brain waves, kept neurons responsive, and all treated rats survived without neurological problems, even though overall blood flow in the brain didn't change.
Grigor'ev. V V VV; Ivanova. T A TA; Kustova. E A EA; Petrova. L N LN; Serkova. T P TP; Bachurin. S O...
In rats, the peptide called delta sleep‑inducing peptide (DSIP) makes the brain's inhibitory GABA signals stronger and blocks the excitatory NMDA signals. This effect depends on the dose and was seen in several brain areas, suggesting DSIP could influence sleep and brain activity, but the study is purely animal‑based.
Bobyntsev. I I II; Kryukov. A A AA; Belykh. A E AE; Dudka. V T VT
In rats, a low dose (40 µg/kg) of delta sleep‑inducing peptide (DSIP) boosted liver antioxidant enzymes (catalase and SOD) during short‑term stress, but higher doses didn’t help. Under long‑term stress, the same low dose actually lowered those enzymes, while a mid dose (120 µg/kg) reduced a liver damage marker (AST) and raised total protein. The highest dose (360 µg/kg) had no effect.
Gimble. J M JM; Ptitsyn. A A AA; Goh. B C BC; Hebert. T T; Yu. G G; Wu. X X; Zvonic. S S; Shi. X-M X...
Researchers found that a protein called GILZ (also known as delta sleep‑inducing peptide or DSIP) shows daily rhythms in fat tissue and may connect our sleep‑wake cycles to how fat is stored or burned. While this is still early‑stage science, it hints that tweaking sleep‑related signals could influence weight and metabolism.
In rats, giving delta‑sleep‑inducing peptide (DSIP) made neurons in the dorsal hippocampus less responsive to stimulation from the lateral hypothalamus, which is a brain area involved in arousal and motivation. This suggests DSIP can dampen certain brain signals that are linked to wakefulness or emotional activation.
Scientists built a math model that mimics how four groups of brain cells control sleep, wakefulness, and REM sleep. The model matches real rat sleep patterns and can be tweaked to simulate human sleep cycles, showing how different brain signals interact.
Lipina. T V TV; Mikhnevich. N V NV; Epstein. O I OI
A study in male mice found that giving tiny amounts of antibodies against the sleep‑related peptide DSIP reduced anxiety‑like behavior, especially in mice already showing anxiety and depression signs. The tests used standard anxiety and depression assays.
Seifritz. E E; Müller. M J MJ; Schönenberger. G A GA; Trachsel. L L; Hemmeter. U U; Hatzin...
In a small study of seven healthy men, the amount of delta‑sleep‑inducing peptide (DSIP) in the blood fell sharply right when they fell asleep, whether they went to bed at night or after being kept awake. This drop happened together with normal sleep‑related brain waves and hormone changes, but it wasn't tied to any particular sleep stage.
In rats, giving antibodies that boost the activity of the brain peptide delta sleep‑inducing peptide (DSIP) and a related protein reduced signs of depression, especially when both were used together. The researchers think these antibodies may tweak brain pathways that control positive emotions and stress resistance.
Friedman. T C TC; García-Borreguero. D D; Hardwick. D D; Akuete. C N CN; Doppman. J L JL; Dorn....
People with Cushing syndrome sleep less deep (delta sleep) and have lower blood levels of a peptide called DSIP, but higher DSIP levels oddly correlate with less deep sleep, suggesting DSIP isn’t a simple sleep‑boosting drug.
Khvatova. Elena M EM; Samartzev. Victor N VN; Zagoskin. Pavel P PP; Prudchenko. Igor A IA; Mikhaleva...
In rats, the peptide delta sleep‑inducing peptide (DSIP) boosted the efficiency of brain mitochondria, making them produce more ATP without increasing wasteful oxygen use. When rats were exposed to low‑oxygen stress, a single dose of DSIP (120 µg per kg, injected) prevented the usual drop in mitochondrial activity, suggesting a protective effect against stress‑related energy loss.
Sudakov. K V KV; Coghlan. J P JP; Kotov. A V AV; Salieva. R M RM; Koplik. E V EV
In rats, giving the peptide delta‑sleep‑inducing peptide (DSIP) changes key stress‑related chemicals like substance P, beta‑endorphin and cortisol. The changes depend on when DSIP is given and are stronger in a strain of rats that handles stress better (Wistar) than in a more stress‑sensitive strain (August).
Sudakov. K V KV; Umryukhin. P E PE; Koplik. E V EV; Anokhin. K V KV
In rats that are naturally more prone to stress, a single injection of the peptide delta sleep‑inducing peptide (DSIP) reduced the brain's immediate stress‑response signal (c‑fos gene activity). This suggests DSIP may have an anti‑stress effect, at least in animal models.
Schulz. P P; Lustenberger. S S; Degli Agosti. R R; Rivest. R W RW
The study tracked DSIP (delta‑sleep‑inducing peptide) and many other hormones in five healthy men during a normal day and during a 34‑hour fast with bed rest. DSIP levels barely changed between the active and resting conditions, showing that everyday activity or short‑term fasting doesn’t noticeably affect its blood concentration. Hormone patterns were stable for each person but varied a lot between different people.
In rats that were given drugs to over‑activate dopamine (like L‑DOPA or amphetamine), a single low dose of delta‑sleep‑inducing peptide (DSIP) changed brain chemistry, especially boosting serotonin‑related activity, which seemed to help normalize the dopamine‑driven disturbances.
Shustanova. T A TA; Bondarenko. T I TI; Milyutina. N P NP; Mikhaleva. I I II
In rats, giving a single injection of delta‑sleep inducing peptide (DSIP) boosted the body's antioxidant defenses and helped balance harmful free radicals, especially when the animals were exposed to cold stress. The peptide raised the activity of key antioxidant enzymes and glutathione, while also normalizing other stress‑related enzymes.
Westrin. A A; Engstöm. G G; Ekman. R R; Träskman-Bendz. L L
The study found that people who have attempted suicide have higher levels of the peptide DSIP in their blood, and in healthy people, higher DSIP levels are linked to more impulsive or antisocial traits. It also showed that another peptide, NPY, relates to how well someone handles stress. The research is mostly observational and doesn’t give clear guidance on how to use DSIP for health or performance.