Shandra. A A AA; Godlevskiĭ. L S LS; Brusentsov. A I AI; Karliuga. V A VA
A study in rats found that giving the delta‑sleep‑inducing peptide (DSIP) changed how the brain reacts to a chemical (NMDA) that normally triggers seizures. The results hint that DSIP might protect brain cells from the harmful over‑activation of certain receptors, but the work was done only in animals and doesn’t give clear guidance for human use.
Sudakov. K V KV
The study suggests that emotional stress messes up the brain's chemical balance, and that certain natural brain peptides (Substance P, a sleep‑inducing peptide, and beta‑endorphin) can restore that balance and make stressed animals more resistant to stress.
Uskova. N I NI; Lysenko. A V AV; Mendzheritskii. A M AM
In a lab study using rats exposed to high‑pressure oxygen, the natural compound putrescine worked better than the delta‑sleep‑inducing peptide (DSIP) and its look‑alike versions at delaying seizures. Putrescine also helped keep brain chemicals that calm nerves (GABA and homocarnosine) from dropping and lowered harmful fat‑oxidation products in the brain and blood.
Ul'ianinskiĭ. L S LS
In rabbit experiments, boosting the parasympathetic nervous system, doing light exercise, feeling positive emotions, and giving a peptide called delta‑sleep peptide (DSIP) helped keep the heart stable during emotional stress. These actions lowered harmful stress hormones in the heart and stopped abnormal heartbeats.
Prudchenko. I A IA; Stashevskaia. L V LV; Mikhaleva. I I II; Ivanov. V T VT; Shandra. A A AA; Godlev...
Scientists created 11 new versions of the delta‑sleep peptide (DSIP) by tweaking three spots in its structure. When tested in rats and mice, a few of these analogues stopped seizures better than the original peptide, both when injected directly into the brain and when given peripherally.
Rikhireva. G T GT; Makletsova. M G MG; Mendzherkitskiĭ. A M AM; Vartanian. L S LS; Gurevich. S...
In rats that were forced to stay still (a model of stress), giving them the sleep‑inducing peptide DSIP or a similar peptide before the stress reduced harmful free‑radical activity in the brain and liver. This suggests the peptides have antioxidant, anti‑stress properties in this animal model.
Iumatov. E A EA; Salieva. R M RM
In stressed rats, giving the peptide DSIP (delta‑sleep inducing peptide) raised levels of a brain chemical called substance P, reduced stress‑related changes in the adrenal glands and thymus, and helped more rats survive emotional stress. Both a single shot and a series of five shots worked, with effects seen a few hours after injection.
Mendzheritskiĭ. A M AM; Buravkov. S V SV; Nikonova. E A EA; Matsionis. A E AE; Povilaĭti...
A study in rats found that giving the delta‑sleep‑inducing peptide (DSIP) caused the brain's sensorimotor cortex to grow more inhibitory connections on the cell bodies of neurons. These extra connections might help keep the brain's excitement and calm in balance, which could be part of how DSIP influences sleep and brain function.
Shandra. O A OA; Hodlevs'kyĭ. L S LS; Mazarati. A M AM; Oleshko. A A AA; Vast'ianov. R S RS; M...
In rats, injecting the peptide delta sleep‑inducing peptide (DSIP) directly into a specific brain region (the substantia nigra) reduced seizures caused by certain chemicals, but not all types of seizures. The anti‑seizure effect depended on opioid pathways and was boosted when dopamine activity was blocked.
Kuraev. G A GA; Mendzheritskiĭ. A M AM; Povilaĭtite. P E PE
In rats, injecting the delta‑sleep peptide (DSIP) changed the tiny structures inside brain cells of the sensory‑motor cortex. It turned on parts of the cell nucleus and boosted the metabolism linked to brain plasticity, and it also made certain synapses (axon‑axon and axon‑soma connections) more active, hinting that DSIP can tweak inhibitory brain signals.
Voĭtenko. N N NN; Kolpakov. V G VG
In rats that are naturally prone to catatonic (freeze‑like) reactions, the balance between two brain enzymes (MAO‑B and MAO‑A) is shifted toward more MAO‑B activity. Giving the peptide DSIP (delta‑sleep‑inducing peptide) restores the normal enzyme balance and stops the cats‑like reactions, suggesting DSIP can affect brain chemistry linked to catatonia.
Pimenova. T I TI
A study in 20 male rabbits gave a single IV dose of delta‑sleep‑inducing peptide (DSIP) and watched how the heart and blood vessels reacted. Some rabbits showed mainly heart‑related changes, others mainly vessel‑related changes, but all the shifts stayed inside normal, healthy ranges. The researchers think DSIP might directly affect blood‑vessel tone and heart muscle strength, but they aren't sure.
Li. H Y HY; Liu. S Y SY
Researchers put tree shrews on a super‑fast light‑dark schedule (45 min light, 45 min dark) to mimic a space‑station rhythm. This messed up the animals' natural daily activity patterns, cutting morning movement and creating a huge evening spike, while overall 24‑hour activity dropped. Giving the sleep‑peptide Asp5‑alpha‑DSIP for a few days didn’t stop the disruption, but it did keep the total daily activity from falling and even slightly boosted it in some cases.
Bondarenko. T I TI; Krichevskaia. A A AA; Sheĭkina. I V IV; Kiriukhina. E V EV
In rats, a single dose of the sleep‑related peptide DSIP caused a temporary rise in adrenaline (the fight‑or‑flight hormone) in the brain, liver, and adrenal glands. The increase lasted a few hours to a few days, and under cold‑stress conditions DSIP made the adrenaline boost even larger. After a couple of days the adrenal gland adrenaline level actually fell.
Viglinskaia. I V IV; Salimov. R M RM; Maĭskiĭ. A I AI
In rats that drink alcohol, stopping the alcohol caused big sleep problems, like less deep sleep and more awakenings. Giving them a tiny dose of delta sleep‑inducing peptide (DSIP) before bedtime helped smooth out these sleep disturbances. The study suggests DSIP might be useful for easing sleep issues during alcohol withdrawal, but it was only tested in rats.
Badikov. V I VI; Gitel'. E P EP; Ivanova. N Ia NIa; Ivolgina. L G LG; Fedianina. M G MG; Zaĭts...
In a rabbit study, scientists put a tiny amount of the sleep‑inducing peptide DSIP (and some amino acids) onto the eye surface. Within 10 minutes the peptide showed up in many body parts, including the brain, and reached its highest level in the visual part of the brain after about 2 hours. It also appeared quickly in the heart, spleen and the optic chiasm.
Ul'ianinskiĭ. L S LS; Zviaginstseva. M A MA
A small rabbit study found that giving delta‑sleep peptide (DSIP) makes the heart less reactive to sympathetic nerve stimulation, while blocking DSIP makes the heart react more strongly. This suggests DSIP can tone down the nervous system's push on the heart.
Hermann-Maurer. E K EK; Drews. U U; Imhof-Eichenberger. E E; Knab. H H; Schneider-Helmert. D D; Hent...
The study compared people with insomnia to healthy sleepers and found that insomniacs tend to use less aggressive coping styles and are less likely to assume hostile intentions in situations. Their coping style that involves turning against themselves (TAS) is linked to more depressive symptoms. These patterns also relate to certain personality traits.
Charnay. Y Y; Léger. L L; Golaz. J J; Sallanon. M M; Vallet. P G PG; Guntern. R R; Bouras. C C;...
Researchers mapped where the delta sleep‑inducing peptide (DSIP) lives in the cat brain and pituitary gland. They found DSIP‑like cells in several hypothalamic regions, often together with the hormone‑releasing hormone that controls reproduction (LHRH). In the pituitary, DSIP showed up in cells that make stress‑related hormones (ACTH) and pigment‑related hormones.
Wachtel. E E; Koplik. E E; Kolometsewa. I A IA; Balzer. H U HU; Hecht. K K; Oehme. P P; Ivanow. V T...
In stressed rats that couldn’t sleep well, a peptide called substance P (SP1‑11) helped them get back to normal sleep better than another peptide called DSIP. The two peptides changed how long the rats slept, how much time they spent in different sleep stages, and the pattern of their sleep cycles, but SP1‑11 showed stronger overall effects.