A neuropeptide that induces delta sleep, reduces stress, modulates hormone release, and exhibits antioxidant effects in various physiological processes.
Salieva. R M RM; Ianovskiĭ. K K; Ratsak. R R; Trofimova. Ia I IaI; Oehme. P P; Sudakov. K V KV...
In rats, giving the peptide delta‑sleep‑inducing peptide (DSIP) raised levels of the brain chemical substance P and helped the animals cope better with emotional stress. A single dose also cut down typical stress signs like enlarged adrenal glands and shrinking thymus.
Mendzheritskiĭ. A M AM; Makletsova. M G MG; Uskova. N I NI; Choraian. I O IO; Mikhaleva. I I I...
The study found that giving delta-sleep‑inducing peptide (DSIP) to subjects under low‑activity stress helped keep brain chemicals like GABA, glutamate, aspartate and homocarnosine at normal levels, reduced stress‑related enzyme changes, and protected brain lipids from damage.
Zlokovic. B V BV; Segal. M B MB; Davson. H H; Lipovac. M N MN; Hyman. S S; McComb. J G JG
The study shows that delta sleep‑inducing peptide (DSIP) can cross the blood‑brain barrier and the blood‑cerebrospinal fluid barrier in animals by a saturable (carrier‑mediated) process, meaning the peptide stays intact and can reach the brain when given outside the skull.
Popova. N S NS; Dovedova. E L EL; Adrianov. O S OS
The study shows that the sleep‑inducing peptide DSIP and a related tetrapeptide (TPA) both boost serotonin activity in the brain and make people less reactive to visual and sound cues. DSIP may be useful for conditions involving mental overload, while TPA also changes motor function and the brain's cholinergic system.
Ji. A X AX; Li. C X CX; Ye. Y H YH; Lin. Y Y; Xing. Q Y QY; Liu. S Y SY; Zhang. W Y WY; Wang. Z S ZS...
Researchers made a pure form of the sleep‑inducing peptide DSIP and gave it to rabbits. When injected, DSIP boosted the deep‑sleep brain waves (delta and sigma) on EEG, and the effect didn’t wear off after a week of daily dosing. Even much larger doses directly into the brain didn’t make the effect stronger, suggesting DSIP works differently from ordinary sleeping pills.
Schneider-Helmert. D D; Gnirss. F F; Monnier. M M; Schenker. J J; Schoenenberger. G A GA
A tiny study gave six healthy people a short IV dose of synthetic DSIP and found they felt sleepy right away and slept about 60% longer in the next two hours. That night they fell asleep faster, spent less time in light sleep, and had better overall sleep quality. No side effects or classic drug‑like sedation were seen.
Researchers made a version of the sleep‑boosting peptide DSIP that can cross the blood‑brain barrier by attaching a special carrier peptide. In mice made sleepy‑deprived with a drug, this new DSIP‑CBBBP improved sleep and balanced brain chemicals like serotonin, glutamate, dopamine and melatonin better than regular DSIP.
Mikhaleva. Inessa I II; Prudchenko. Igor A IA; Ivanov. Vadim T VT; Voitenkov. Vladislav B VB
Scientists found that a family of proteins called JMJD1B histone demethylases contains a short sequence that looks a lot like the stress‑protective peptide DSIP. They made a synthetic version of this similar peptide and saw modest effects in animal stress tests, suggesting these proteins might be natural sources of DSIP in the body.
Tukhovskaya. Elena A EA; Shaykhutdinova. Elvira R ER; Ismailova. Alina M AM; Slashcheva. Gulsara A G...
A peptide similar to the sleep‑related DSIP, called KND, was tested in rats and mice that had a heart attack or a stroke. When the peptide was given right after blood flow was restored (reperfusion), it cut the damage in the heart and brain roughly in half compared to doing nothing. Giving the peptide during the blockage itself was deadly, so it only works when blood flow returns.
Mikhaleva. I I II; Ivanov. V T VT; Voĭtenkov. V B VB; Vechkanov. E M EM; Bondarenko. T I TI
Researchers compared the well‑known sleep peptide DSIP with a newly identified, very similar peptide called KND. In animal tests KND showed the same effects as DSIP and even stronger antioxidant, anti‑seizure and behavior‑modifying actions, suggesting it might be the natural version of DSIP in the body.
Mikhaleva. I I II; Ivanov. V T VT; Onoprienko. L V LV; Prudchenko. I A IA; Chikin. L D LD; Yakubovsk...
Scientists made 16 slightly altered versions of a brain peptide called DSIP and tested them for antioxidant and detoxifying effects. Most of the new peptides acted as antioxidants, and one version (called ID‑6) was as strong as vitamin C. In mice, ID‑6 also cut the death rate from a toxic chemotherapy drug (cisplatin) and improved liver and kidney blood markers.
In a rat study, the sleep‑related peptide DSIP and a short version of it (DSIP‑1‑4) lowered the number and severity of seizures caused by a chemical that triggers brain storms. Both peptides also boosted slow‑wave (delta) brain activity. The researchers think these peptides might work as anti‑seizure agents, but the work was done only in animals.
Tallis. Jason J; Bolt. Lee L; Morris. Rhys O RO; Suchomel. Timothy J TJ; Eustace. Steven J SJ
Researchers tested how consistent different ways of measuring the Dynamic Strength Index (DSI) are across two testing sessions and whether those measurements predict sprint speed or change‑of‑direction ability. They found the traditional DSI method was a bit more reliable than newer, time‑specific versions, but overall reliability was only fair to moderate. The DSI numbers didn’t strongly link to sprint or agility performance, except the 100 ms version for the dominant leg showed a modest connection.
In rats exposed to simulated high‑altitude low‑oxygen conditions, daily injections of a phosphorylated form of delta sleep‑inducing peptide (p‑DSIP) improved both deep and REM sleep, which in turn helped the animals perform better on a water‑maze memory test. The peptide also boosted a brain protein (p‑CREB) linked to memory formation. However, the work was done only in animals, using an injection dose that isn’t directly translatable to humans.
Tukhovskaya. Elena A EA; Ismailova. Alina M AM; Shaykhutdinova. Elvira R ER; Slashcheva. Gulsara A G...
In a rat study, giving the peptide DSIP through the nose before and for a week after a stroke helped the animals get their motor skills back faster, even though the size of the brain damage wasn't clearly smaller.
Scientists studied a repair enzyme from a yeast called Candida utilis. This enzyme, PCMT, can fix damaged proteins that have a specific kind of aging-related change (isoaspartate). They found it works on a peptide called DSIP, helps cells survive stress, and is linked to higher reactive oxygen species inside cells.
Pomfrett. Chris J D CJ; Dolling. Stuart S; Anders. Nicola R K NR; Glover. David G DG; Bryan. Angella...
In a small study of 24 women undergoing surgery, giving the peptide Delta Sleep‑Inducing Peptide (DSIP) did not deepen the anesthetic state. Instead, it raised heart rate, lowered heart‑rate variability (a sign of reduced parasympathetic tone), cut the slow‑wave (delta) brain activity, and made the brain‑wave pattern look more like a lighter level of anesthesia.
In a rat study, a natural peptide called delta sleep‑inducing peptide (DSIP) and two slightly modified versions were given after the animals had a seizure‑triggering drug. The peptides reduced how often and how severe the seizures were and boosted slow‑wave (delta) brain activity.
Stanojlović. O O; Hrncić. D D; Zivanović. D D; Rasić. A A; Susić. V V
In rats, both the anti‑seizure drug valproate and the peptide DSIP reduced the chance of seizures caused by a chemical called metaphit. DSIP worked more slowly and only partially, while valproate acted quickly but also didn't fully stop seizure‑related brain activity.
Sukhanova. T V TV; Artiukhov. A A AA; Prudchenko. I A IA; Golunova. A S AS; Seminikhina. M A MA; Sht...
Researchers tested how a sleep‑related peptide (DSIP) can be trapped in different kinds of PVA‑based gels and how fast it comes out. The porous gels let the peptide spill out quickly (within minutes to a few hours), while the dense, non‑porous gels kept the peptide locked in even after two days.