Opioid withdrawal model
In morphine-dependent rats, Selank cut the total withdrawal index by 39.6%, close to diazepam's 49.3% in the same experiment.
Bulletin of Experimental Biology and Medicine, 2022

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In stockA synthetic peptide studied primarily in neuroscience research, including investigations into neurotransmitter signaling and behavioral pathways. Selank remains a compound of interest for exploring peptide activity within the central nervous system. For laboratory research use only.
Size: 10MG
For laboratory research use only. Not for human or animal consumption.
Overview
Selank started as an immune fragment. Its first four residues, Thr-Lys-Pro-Arg, are tuftsin, a tetrapeptide cut from the heavy chain of IgG antibodies. Researchers at the Institute of Molecular Genetics in Russia added a Pro-Gly-Pro tail to slow its breakdown, giving the heptapeptide TKPRPGP. That hybrid origin explains why selank peptides turn up in two very different literatures: anxiety and memory models on one side, stress, gut and immune markers on the other.
The label is where buyers get caught out. N-acetyl Selank amidate is a separate compound with an acetyl group on one end and an amide on the other, roughly 41 Da heavier than the standard chain. Forum threads trade tips on which version is "better," but for a study, the version is simply part of the method. The market doesn't make it easy: some listings never print a sequence, and one seller lists a spring batch while displaying the report from an older one. Titan Core sells the standard, unmodified heptapeptide, made in the USA. Every batch goes to an independent lab for HPLC purity and mass spectrometry, and the report carries the same LOT as your vial. Selank is sold strictly for laboratory research and isn't for human or animal use.
Research highlights
In morphine-dependent rats, Selank cut the total withdrawal index by 39.6%, close to diazepam's 49.3% in the same experiment.
Bulletin of Experimental Biology and Medicine, 2022
In rats given ethanol for 30 weeks, Selank prevented withdrawal-linked memory and attention deficits and blocked the ethanol-driven rise in hippocampal BDNF.
Bulletin of Experimental Biology and Medicine, 2019
Under chronic foot-shock stress, Selank reduced degenerative changes in rat hepatocytes, and higher doses restored the nucleus-to-cytoplasm ratio.
Bulletin of Experimental Biology and Medicine, 2019
In restraint-stressed rats, Selank lowered corticosterone and reduced atrophy and inflammation in the colon wall.
Bulletin of Experimental Biology and Medicine, 2020
Chronic restraint stress depleted obligate gut bacteria and favored opportunistic ones; Selank restored the balance.
Bulletin of Experimental Biology and Medicine, 2019
Anti-doping chemists identified Selank and Semax in two unknown seized preparations and set out methods to detect them.
Drug Testing and Analysis, 2020
Specifications
Amino-acid sequence
Thr-Lys-Pro-Arg-Pro-Gly-Pro (TKPRPGP, unmodified)
FAQ
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