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Selank (Russian: Cеланк) is a nootropic, anxiolytic peptide based drug developed by the Institute of Molecular Genetics of the Russian Academy of Sciences. Selank is a heptapeptide with the sequence Thr-Lys-Pro-Arg-Pro-Gly-Pro. It is a synthetic analogue of human tuftsin.
Contents
1Pharmacology
2Clinical trials
3See also
4References
5External links
Pharmacology[edit]
Selank is a synthetic analogue of the immunomodulatory peptide tuftsin; as such, it mimics many of its effects. It has been shown to modulate the expression of Interleukin-6 (IL-6) and affect the balance of T helper cell cytokines.[1] It has been shown to influence the concentration of monoamine neurotransmitters[2] and induce metabolism of serotonin.[3][4] Selank has also been found to rapidly elevate the expression of brain-derived neurotropic factor (BDNF) in the hippocampus of rats.[5]
Selank, as well as a related peptide drug, Semax, have been found to inhibit enzymes involved in the degradation of enkephalins and other endogenous regulatory peptides, and this action may be involved in their effects.[6] It has also been found to affect the activity of carboxypeptidase H and phenylmethylsulfonylfluoride-inhibited carboxypeptidase in rat nervous system tissue.[7]
Selank has been found to produce antidepressant-like effects in animal models of depression and anhedonia.[8]
Clinical trials[edit]
In clinical trials, the drug has shown to provide a sustained nootropic and anxiolytic effect which is useful for the treatment of generalized anxiety disorder (GAD).[1] Selank has an advantage over traditional anxiety treatments, such as benzodiazepines, as it has no sedating or negative cognitive side effects and no associated addiction or withdrawal problems.
Selank is closely related to another nootropic drug, Semax, also developed by the Institute of Molecular Genetics in Russia. This drug is currently available in Russian and Ukrainian pharmacies.[9]
As with all lyophilized peptides, it needs refrigeration to remain stable within sterile water solutions, such as bacteriostatic water concentrations.
See also[edit]
Afobazole
Mebicar
Semax
References[edit]
^ abUchakina, O. N.; Uchakin, P. N.; Miasoedov, N. F.; Andreeva, L. A.; Shcherbenko, V. E.; Mezentseva, M. V.; Gabaeva, M. V.; Sokolov, O. U.; Zozulia, A. A.; Ershov, F. I. (2008). "Immunomodulatory effects of selank in patients with anxiety-asthenic disorders". Zhurnal nevrologii i psikhiatrii imeni S.S. Korsakova / Ministerstvo zdravookhraneniia i meditsinskoi promyshlennosti Rossiiskoi Federatsii, Vserossiiskoe obshchestvo nevrologov [i] Vserossiiskoe obshchestvo psikhiatrov. 108 (5): 71–75. PMID 18577961..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
^Narkevich, VB; Kudrin, VS; Klodt, PM; Pokrovskiĭ, AA; Kozlovskaia, MM; Maĭskiĭ, AI; Raevskiĭ, KS (2008). "Effects of heptapeptide selank on the content of monoamines and their metabolites in the brain of BALB/C and C57Bl/6 mice: a comparative study". Eksperimental'naia i klinicheskaia farmakologiia. 71 (5): 8–12. PMID 19093364.
^Semenova, T. P.; Kozlovskiĭ, I. I.; Zakharova, N. M.; Kozlovskaia, M. M. (2010). "Experimental optimization of learning and memory processes by selank". Eksperimental'naia i klinicheskaia farmakologiia. 73 (8): 2–5. PMID 20919548.
^Semenova, T. P.; Kozlovskiĭ, I. I.; Zakharova, N. M.; Kozlovskaia, M. M. (2009). "Comparison of the effects of selank and tuftsin on the metabolism of serotonin in the brain of rats pretreated with PCPA". Eksperimental'naia i klinicheskaia farmakologiia. 72 (4): 6–8. PMID 19803361.
^Inozemtseva, LS; Karpenko, EA; Dolotov, OV; Levitskaya, NG; Kamensky, AA; Andreeva, LA; Grivennikov, IA (2008). "Intranasal administration of the peptide Selank regulates BDNF expression in the rat hippocampus in vivo". Doklady Biological Sciences. 421: 241–3. doi:10.1134/s0012496608040066. PMID 18841804.
^Kost NV; Sokolov OIu; Gabaeva MV; et al. (2001). "Semax and selank inhibit the enkephalin-degrading enzymes from human serum". Bioorg. Khim. (in Russian). 27 (3): 180–3. doi:10.1023/A:1011373002885. PMID 11443939.
^Solov'ev VB, Gengin MT, Sollertinskaia TN, Latynova IV, Zhivaeva LV (2012). "[Effect of selank on the main carboxypeptidases in the rat nervous tissue]". Zh. Evol. Biokhim. Fiziol. (in Russian). 48 (3): 254–7. PMID 22827026.
^Sarkisova KIu, Kozlovskiĭ II, Kozlovskaia MM (2008). "[Effects of heptapeptide selank on genetically-based and situation-provoked symptoms of depression in behavior in WAG/Rij and Wistar rats, and in BALB/c mice]". Zh Vyssh Nerv Deiat Im I P Pavlova (in Russian). 58 (2): 226–37. PMID 18661785.
^Institute of Molecular Genetics: Translation of Archived 2011-07-22 at the Wayback Machine.
Full-time equivalent From Wikipedia, the free encyclopedia Jump to navigation Jump to search Full-time equivalent ( FTE ) or whole time equivalent ( WTE ) is a unit that indicates the workload of an employed person (or student) in a way that makes workloads or class loads comparable [1] across various contexts. FTE is often used to measure a worker's or student's involvement in a project, or to track cost reductions in an organization. An FTE of 1.0 is equivalent to a full-time worker or student, while an FTE of 0.5 signals half of a full work or school load. [2] Contents 1 U.S. Federal Government 2 In education 2.1 Example 3 Notes 4 References U.S. Federal Government [ edit ] In the U.S. Federal Government, FTE is defined by the Government Accountability Office (GAO) as the number of total hours worked divided by the maximum number of compensable hours in a full-time schedule as
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