Terekhova. S F SF; Grechenko. T N TN
Scientists tested incredibly tiny amounts (10‑15 to 10‑27 M) of several chemicals, including the sleep peptide DSIP, on single nerve cells from a mollusk. They saw that these ultra‑low doses triggered long‑lasting changes in the cells' electrical activity, and the strength of the response didn’t seem to depend on how much was added or what chemical was used. The authors think this hints at a hidden way cells can be regulated, but the study was done in a very basic lab setting, not in people.
Shandra. O O OO
In a rat study, skin inflammation caused by chromium messed up the animals' immune system and made their white blood cells less stable. Giving the rats melatonin, a supplement many people already use, and a compound called deltaran—either alone or together—helped fix those immune problems, with the combo working best.
Kim. T K TK; Karantysh. G V GV; Mendzheritskiĭ. A M AM; Ryzhak. G A GA
A study in rats found that the peptide Deltaran (dsip) changed brain chemicals and reduced stress effects in older rats after blocking a carotid artery, hinting it might protect the brain under low‑oxygen conditions. However, the research was only in animals and didn’t give any dosing or safety info for people.
Umriukhin. P E PE; Anokhin. K V KV; Raevskiĭ. K S KS
In rats, a brain‑injected drug that blocks NMDA receptors (MK‑801) stops the sleep‑related peptide DSIP from lowering activity of a gene called c‑fos in a specific hypothalamic area. This shows that DSIP’s effect depends on NMDA‑type signaling, but the experiment was done in a very controlled animal model using direct brain injections.
Bondarenko. T I TI; Matsynova. I V IV; Mikhaleva. I I II
The study shows that a peptide called delta-sleep‑inducing peptide can block the activity of two enzymes (trypsin and pronase E) in a test‑tube experiment, and the effect changes with the amount of peptide used.
Nekrasov. A N AN; Mikhaleva. I I II
Scientists used computer modeling and NMR data to map the 3D shape of a circular version of the sleep‑inducing peptide DSIP. They found the molecule is almost flat, with certain side chains grouped on one side and the tryptophan side chain on the opposite side, which might explain how it works.
Najimi. M M; Bennis. M M; Moyse. E E; Kopp. N N; Chigr. F F
Researchers looked at where the brain peptide DSIP is found in the hypothalamus of babies during the first year of life. They saw that DSIP cells are few and scattered, while its fibers are spread throughout the region, and the amount of DSIP changes as the baby ages. This suggests DSIP may be involved in brain development and early‑life bodily functions.
Koplik. E V EV; Grysunov. Iu A IuA; Dobretsov. G E GE
Researchers measured a blood protein called albumin in rats that were either good or poor at handling emotional stress. They also gave some rats two peptides—DSIP and SEMAX—to see if these could boost stress resistance and how they changed albumin levels. The study is basic and done in animals, so it doesn’t give clear instructions for people to use these peptides.
Bondarenko. T I TI; Miliutina. N P NP; Shustanova. T A TA; Mikhaleva. I I II
In rats, giving the peptide delta sleep‑inducing peptide (DSIP) by injection boosted the activity of several antioxidant enzymes and raised glutathione levels in blood, liver and brain, both under normal conditions and when the animals were exposed to cold stress.
Popova. N S NS; Dovedova. E L EL
The study found that giving the peptide DSIP after a dose of amphetamine made the animals' behavior worse, but it didn't change brain wave patterns (EEG) in the visual, motor, or caudate areas. This suggests DSIP's effects depend on how dopamine is over‑activated.
Rikhireva. G T GT; Sokolova. I S IS; Rylova. A V AV; Kopylovskiĭ. S A SA; Mikhaleva. I I II; P...
A study in mice found that giving a high dose of the delta‑sleep‑inducing peptide (DSIP) by injection boosted protein production in the brain, liver, and spleen and changed how stress affected that protein production. The researchers think DSIP’s stress‑protective (adaptogenic) effects may come from this influence on protein synthesis.
Shandra. A A AA; Godlevskiĭ. L S LS; Vast'ianov. R S RS; Brusentsov. A I AI; Mikhaleva. I I II...
In rats, injecting delta‑sleep‑inducing peptide (DSIP) or its close relatives directly into a specific brain area (the substantia nigra) made the animals move less and, for some versions, delayed the onset of seizures caused by a chemical. The exact effect varied with the peptide’s structure.
Brusentsov. A I AI; Moroz. V V VV; Suprun. S A SA; Pomazanova. T N TN; Shandra. A A AA; Godlevski&#x...
In rats, a seizure‑triggering chemical (picrotoxin) reduced the ability of immune cells to respond to typical stimulants. The delta‑sleep‑inducing peptide (DSIP) and the anti‑seizure drug carbamazepine both blocked the seizure‑like effects, and carbamazepine also helped keep the immune response from dropping.
Sergutina. A V AV; Gershtein. L M LM
In a rat study, a single dose of delta sleep‑inducing peptide (DSIP) boosted the activity of enzymes that break down serotonin and other monoamines in parts of the brain linked to reward, and increased an enzyme involved in glutamate metabolism in the hippocampus. It didn’t change enzyme activity in the sensorimotor cortex or affect enzymes that handle acetylcholine.
Chakraborty. A A; Saha. D D; Bose. A A; Hileman. R E RE; Chatterjee. M M; Gupta. N K NK
The study shows how a protein called p67 can protect another protein, eIF‑2, from being turned off by an enzyme (dsI) that adds phosphate groups. At low levels of the enzyme, p67 works well, but when the enzyme is abundant, it overpowers p67 unless a lot more p67 is present. The enzyme also phosphorylates itself, and p67 blocks both its own and eIF‑2’s phosphorylation.
Koval'zon. V M VM; Obal. F F; Alfoldi. P P; Inoue. S S; Kimura-Takeuchi. M M; Mikhaleva. I I II; Pru...
In a lab study on rabbits and rats, researchers gave three modified versions of the peptide DSIP directly into the brain and found that each version boosted deep (slow‑wave) and REM sleep at different times. The effects varied by the specific chemical tweak and by animal species, and the sleep‑enhancing action may involve other hormones like GRF and CLIP.
Liu. S Y SY; Zhang. W Y WY; Li. H Y HY; Dai. X J XJ; Zhang. Y Y; Xu. J C JC; Chen. L L LL; Wang. S Q...
Researchers isolated new sleep‑promoting substances from the urine of sleep‑deprived tree shrews and showed that two purified fractions (called S2C and S4B) increased deep (delta) sleep when injected directly into the brains of rabbits. These substances are chemically different from the well‑known sleep peptide DSIP.
Karpenko. L D LD; Aroian. E V EV; Mendzheritskiĭ. A M AM; Filin. N N NN
In a snail study, the peptide called delta sleep‑inducing peptide (DSIP) was found to calm down nerve cells, making them less active and less responsive to stimulation, while serotonin did the opposite and excited the cells. The effect of DSIP grew stronger with higher doses and seemed to work directly on the nerves, not through the serotonin system, possibly by opening chloride channels or altering cellular signaling.
Prudchenko-. I A IA; Stashevskaia. L V LV; Shepel'. E N EN; Mikhaleva. I I II; Ivanov. V T VT; Shmal...
Researchers made 11 versions of a brain peptide called DSIP and tested them in mice with lung cancer that spreads to other organs. A few of the new versions worked better than the original peptide at slowing the spread of the cancer, and they also helped restore normal immune cell activity. The benefits depended on small changes at the start of the peptide, showing that shape matters more than just making the peptide harder to break down.
Mendzheritskiĭ. A M AM; Lysenko. A V AV; Mikhaleva. I I II
A single dose of delta‑sleep‑inducing peptide (DSIP) in rats boosts certain brain enzymes that break down proteins. When the rats are inactive (hypokinesia), these enzymes behave oddly and the peptide can partly bring them back toward normal levels, but only in specific short‑term inactivity scenarios.