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Selank...for stress reduction
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[Experimental optimization of learning and memory processes by selank].
AuthorsSemenova TP, et al. Show all Journal
Eksp Klin Farmakol. 2010 Aug;73(8):2-5. Article in Russian.
Affiliation
Abstract
The effect of selank (Thr-Lys-Pro-Arg-Pro-Gly-Pro), which is a synthetic derivative of the endogenous tetrapeptide tuftsin (stable with respect to tissue peptidases), on the learning and memory processes and metabolism of serotonin (5-HT) have been experimentally studied on Wistar rats. The animals were trained with food reward in 30 trials per day. Selank (300 microg/kg) or saline were injected after the 10th trial. Elaboration of conditioned reflex with food reward was continued 30 min later. Retention was tested 24 h, 7 and 30 days after treatment. A single injection of selank activated the metabolism of 5-HT in the hypothalamus and caudal brain stem for 30 min to 2 h. It was established that selank induces an increase in memory trace stability during 30 days. These findings provide direct evidence that selank, when injected during consolidation phase, can enhance memory storage processes. Nootrope activity of the selank is probably caused by its obvious effect on the level of serotonin and its metabolite in the brain.
PMID 20919548 [PubMed - indexed for MEDLINE]
AuthorsSemenova TP, et al. Show all Journal
Eksp Klin Farmakol. 2010 Aug;73(8):2-5. Article in Russian.
Affiliation
Abstract
The effect of selank (Thr-Lys-Pro-Arg-Pro-Gly-Pro), which is a synthetic derivative of the endogenous tetrapeptide tuftsin (stable with respect to tissue peptidases), on the learning and memory processes and metabolism of serotonin (5-HT) have been experimentally studied on Wistar rats. The animals were trained with food reward in 30 trials per day. Selank (300 microg/kg) or saline were injected after the 10th trial. Elaboration of conditioned reflex with food reward was continued 30 min later. Retention was tested 24 h, 7 and 30 days after treatment. A single injection of selank activated the metabolism of 5-HT in the hypothalamus and caudal brain stem for 30 min to 2 h. It was established that selank induces an increase in memory trace stability during 30 days. These findings provide direct evidence that selank, when injected during consolidation phase, can enhance memory storage processes. Nootrope activity of the selank is probably caused by its obvious effect on the level of serotonin and its metabolite in the brain.
PMID 20919548 [PubMed - indexed for MEDLINE]
John Juan
New member
The temporary dynamics of inflammation-related genes expression under tuftsin analog Selank action.
AuthorsKolomin T, et al. Show all Journal
Mol Immunol. 2014 Mar;58(1):50-5. doi: 10.1016/j.molimm.2013.11.002. Epub 2013 Nov 27.
Affiliation
Abstract
Previous studies have shown that synthetic tuftsin analogue Selank and its fragments cause a number of alterations in the expression of certain genes involved in inflammation in mouse spleen. In this work we studied the effect of Selank and its short fragment Gly-Pro on the temporary dynamics of C3, Casp1, Il2rg, and Xcr1 genes expression in mouse spleen after single intraperitoneal injection (100 μg/kg) of peptides using real-time PCR method. We found a significant 3-fold decrease in the C3 mRNA level just 30 min after Selank injection and similar alteration this gene mRNA level after Gly-Pro administration. A wave-like alteration in the Casp1 mRNA level was observed after Selank injection. We found a significant alteration in the mRNA level of the Il2rg gene at early time points after Selank and Gly-Pro administration and an almost equal reduction in the Xcr1 mRNA level 90 min after the administration of Selank and its fragment. Our results showed that, Selank and its short fragment Gly-Pro influence the expression of genes that mediate different types of immune responses, thereby maintaining the balance of the immune system. It should be noted that in most cases, there was a coincidence in the expression profiles of the studied genes after Selank and Gly-Pro administration. This might indicate an active contribution of the dipeptide to the final effect of Selank.
AuthorsKolomin T, et al. Show all Journal
Mol Immunol. 2014 Mar;58(1):50-5. doi: 10.1016/j.molimm.2013.11.002. Epub 2013 Nov 27.
Affiliation
Abstract
Previous studies have shown that synthetic tuftsin analogue Selank and its fragments cause a number of alterations in the expression of certain genes involved in inflammation in mouse spleen. In this work we studied the effect of Selank and its short fragment Gly-Pro on the temporary dynamics of C3, Casp1, Il2rg, and Xcr1 genes expression in mouse spleen after single intraperitoneal injection (100 μg/kg) of peptides using real-time PCR method. We found a significant 3-fold decrease in the C3 mRNA level just 30 min after Selank injection and similar alteration this gene mRNA level after Gly-Pro administration. A wave-like alteration in the Casp1 mRNA level was observed after Selank injection. We found a significant alteration in the mRNA level of the Il2rg gene at early time points after Selank and Gly-Pro administration and an almost equal reduction in the Xcr1 mRNA level 90 min after the administration of Selank and its fragment. Our results showed that, Selank and its short fragment Gly-Pro influence the expression of genes that mediate different types of immune responses, thereby maintaining the balance of the immune system. It should be noted that in most cases, there was a coincidence in the expression profiles of the studied genes after Selank and Gly-Pro administration. This might indicate an active contribution of the dipeptide to the final effect of Selank.
John Juan
New member
[Protective effect of selank on the model of mnestic function violation induced by pharmacological blockade of protein synthesis].
AuthorsKozlovskiĭ II, et al. Show all Journal
Eksp Klin Farmakol. 2013;76(12):3-7. Article in Russian.
Affiliation
Abstract
We have studied the ability of peptide anxiolytic selank (Thr-Lyz-Pro-Arg-Pro-Gly-Pro) to compensate for mnestic dysfunction caused by the administration of actinomycin D, which inhibits protein synthesis by blocking DNA-dependent RNA polymerase. The experiments were performed on white rats with acquired adaptive ability of spatial visual orientation in a 16-door labyrinth. The learning was based on the avoidance of electric skin irritation at alternating sites of escape reaction (site reflex). Selank (0.5 mg/kg, i.p.) prevented or compensated for actinomycin D (250 mg/kg, i.p.) induced violation of the process of acquisition, improvement, and consolidation of memory trace during the development of a complex site reflex. The drug administration also reduced the time required for acquisition of the adaptive ability of spatial visual orientation in the labyrinth and restored the actinomycin D violated process of re-learning upon a change in the alternation of escape sites under free-choice conditions.
AuthorsKozlovskiĭ II, et al. Show all Journal
Eksp Klin Farmakol. 2013;76(12):3-7. Article in Russian.
Affiliation
Abstract
We have studied the ability of peptide anxiolytic selank (Thr-Lyz-Pro-Arg-Pro-Gly-Pro) to compensate for mnestic dysfunction caused by the administration of actinomycin D, which inhibits protein synthesis by blocking DNA-dependent RNA polymerase. The experiments were performed on white rats with acquired adaptive ability of spatial visual orientation in a 16-door labyrinth. The learning was based on the avoidance of electric skin irritation at alternating sites of escape reaction (site reflex). Selank (0.5 mg/kg, i.p.) prevented or compensated for actinomycin D (250 mg/kg, i.p.) induced violation of the process of acquisition, improvement, and consolidation of memory trace during the development of a complex site reflex. The drug administration also reduced the time required for acquisition of the adaptive ability of spatial visual orientation in the labyrinth and restored the actinomycin D violated process of re-learning upon a change in the alternation of escape sites under free-choice conditions.
John Juan
New member
[Selank-induced normalizing effects on the integrative brain activity and biogenic amine level disorders due to antenatal hypoxia].
AuthorsSemenova TP, et al. Show all Journal
Ross Fiziol Zh Im I M Sechenova. 2006 Nov;92(11):1332-8. Article in Russian.
Affiliation
Abstract
The effects of Selank synthetic analog of Tuftsin, representing the heptapeptide forming Thr-Lys-Pro-Arg-Pro-Gly-Pro, on behavior and serotonin/noradrenalin concentrations in brain were investigated in adult rats exposed to hypoxia during 14-16 days of gestation. It was revealed that injection of Selank (300 mkg/kg, i/p) increased 2--3-fold (p < 0.01) the sensory attention, facilitated 1.5-fold the learning capacity (p < 0.01), normalized exploratory activity in the open field and hole board, and recovered the balance of serotonergic and noradrenergic brain system activity. The data obtained demonstrate the possibility of Selank to compensate for long-lasting negative effects of antenatal hypoxia on integrative brain activity and brain monoamine level.
PMID 17385425 [PubMed - indexed for MEDLINE]
AuthorsSemenova TP, et al. Show all Journal
Ross Fiziol Zh Im I M Sechenova. 2006 Nov;92(11):1332-8. Article in Russian.
Affiliation
Abstract
The effects of Selank synthetic analog of Tuftsin, representing the heptapeptide forming Thr-Lys-Pro-Arg-Pro-Gly-Pro, on behavior and serotonin/noradrenalin concentrations in brain were investigated in adult rats exposed to hypoxia during 14-16 days of gestation. It was revealed that injection of Selank (300 mkg/kg, i/p) increased 2--3-fold (p < 0.01) the sensory attention, facilitated 1.5-fold the learning capacity (p < 0.01), normalized exploratory activity in the open field and hole board, and recovered the balance of serotonergic and noradrenergic brain system activity. The data obtained demonstrate the possibility of Selank to compensate for long-lasting negative effects of antenatal hypoxia on integrative brain activity and brain monoamine level.
PMID 17385425 [PubMed - indexed for MEDLINE]
John Juan
New member
Posted on another forum SuperiorPeptide is at...
"My research today of superior selank has been awesome definitely g2g. Will me trying more of their products soon! I experiences more calmness I havent felt for a long time. I was skeptical at first but this shit is great. You dont bug out over the stupid little things that cause anxiety. I took about 100mcg twice today to gauge how i feel. I think i might try 250mcg twice tomorrow. Is there any tolerance that builds up?"
"My research today of superior selank has been awesome definitely g2g. Will me trying more of their products soon! I experiences more calmness I havent felt for a long time. I was skeptical at first but this shit is great. You dont bug out over the stupid little things that cause anxiety. I took about 100mcg twice today to gauge how i feel. I think i might try 250mcg twice tomorrow. Is there any tolerance that builds up?"
John Juan
New member
Efficacy of Peptide Anxiolytic Selank during Modeling of Withdrawal Syndrome in Rats with Stable Alcoholic Motivation.
AuthorsKolik LG, et al. Show all Journal
Bull Exp Biol Med. 2014 May;157(1):52-5. doi: 10.1007/s10517-014-2490-4. Epub 2014 Jun 10.
Affiliation
Abstract
We studied the effects of selank on the development of symptoms of acute 48-h alcohol withdrawal in outbred rats drinking 10 % ethanol as the only source of fluid for 24 weeks. In alcohol-preferring animals (mean daily ethanol intake >5.0 g/kg) allowed free choice between 10 % ethanol and water, single intraperitoneal injection of selank in a dose of 0.3 mg/kg eliminated anxiety induced by ethanol withdrawal in tests elevated plus maze and social interaction tests and prevented the formation of mechanical allodynia without affecting ethanol consumption. The findings suggest that selank is effective in eliminating of alcohol withdrawal symptoms in rats.
AuthorsKolik LG, et al. Show all Journal
Bull Exp Biol Med. 2014 May;157(1):52-5. doi: 10.1007/s10517-014-2490-4. Epub 2014 Jun 10.
Affiliation
Abstract
We studied the effects of selank on the development of symptoms of acute 48-h alcohol withdrawal in outbred rats drinking 10 % ethanol as the only source of fluid for 24 weeks. In alcohol-preferring animals (mean daily ethanol intake >5.0 g/kg) allowed free choice between 10 % ethanol and water, single intraperitoneal injection of selank in a dose of 0.3 mg/kg eliminated anxiety induced by ethanol withdrawal in tests elevated plus maze and social interaction tests and prevented the formation of mechanical allodynia without affecting ethanol consumption. The findings suggest that selank is effective in eliminating of alcohol withdrawal symptoms in rats.
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