Delta Sleep-Inducing Peptide Recovers Motor Function in SD Rats after Focal Stroke.

: Mutual effect of the preliminary and therapeutic intranasal treatment of SD rats with DSIP (8 days) on the outcome of focal stroke, induced with intraluminal middle cerebral occlusion (MCAO), was investigated. : The groups were the following: MCAO + vehicle, MCAO + DSIP, and SHAM-operated. DSIP or vehicle was applied nasally 60 (±15) minutes prior to the occlusion and for 7 days after reperfusion at dose 120 µg/kg.

DSIP-Like KND Peptide Reduces Brain Infarction in C57Bl/6 and Reduces Myocardial Infarction in SD Rats When Administered during Reperfusion.

A structural analogue of the DSIP, peptide KND, previously showed higher detoxification efficacy upon administration of the cytotoxic drug cisplatin, compared to DSIP. DSIP and KND were investigated using the model of acute myocardial infarction in male SD rats and the model of acute focal stroke in C57Bl/6 mice. A significant decrease in the myocardial infarction area was registered in KND-treated animals relative to saline-treated control animals (19.

Effect of delta sleep-inducing peptide on the expression of antioxidant enzyme genes in the brain and blood of rats during physiological aging.

Subcutaneous injections of exogenous delta sleep-inducing peptide in a dose of 100 μg/kg (monthly, 5-day courses) to rats of various age groups (2-24 months) were followed by an increase in the expression of genes for SOD 1 (Sod1) and glutathione peroxidase 1 (Gpx1) in the brain and nucleated blood cells. The expression of these genes was shown to decrease during physiological aging of the body.

[Rat tissues antioxidant status correction by peptide delta sleep during physiological aging of the organism].

It is shown that exogenous delta-sleep inducing peptide increases glutathione antioxidant system level in rat tissues at different stages of ontogenesis, by subcutaneous injection to rats 2-24 months postnatal development in a dose of 100 mg/kg animal body weight by courses of 5 consecutive days per month, and this effect is especially marked in non-renewable postmitotic tissues.

[Metabolic effects of delta-sleep inducing peptide during physiological aging of the organism].

Subcutaneous injection of delta-sleep inducing peptide (DSIP) to postnatal rats (aged from 2 to 24 months) during 5 consecutive days every months at a dose of 10 microg/100 g body weight favors normalization of the age-related changes in carbohydrate metabolism and shows hypoglycemic effect, as manifested by a decrease in the level of glycosylated hemoglobin in erythrocytes of test rats. The administration of DSIP in postnatal rats of different age also led to a decrease in serum total lipid level, total cholesterol level, and atherogenicity index and an increase in the level of high-density lipoprotein cholesterol.