SelankСеланк
What the studies found
Randomized study in people · 2008
Anxiety improvements reported against an active comparator
- Anxiety outcome
- Similar changes reportedNo numerical scale change supplied
In a 62-patient report, the authors described similar anxiety changes with Selank and the comparator treatment, alongside measurements of enkephalin metabolism.
Study notes · methods, sources and limitations
Participants or model 62 patients; treatment-arm counts conflict between indexed abstract (30/32) and abridged reprint (42/20)
Design 62 patients with generalized anxiety disorder or neurasthenia. Indexed abstract: Selank 30, medazepam 32.
- Treatment-arm counts in an abridged reprint
- 42 and 20Conflicts with the indexed 30/32 split
Important limitations
- Treatment-group counts differ between sources; the original report is needed to resolve them.
- Original journal version needed to resolve treatment-arm discrepancy. The 30 anxiety and 32 neurasthenia cases are diagnostic groups. Treatment-group sizes are separate. Allocation concealment and blinding remain unresolved. Active-comparator similarity does not establish noninferiority or long-term safety.
- The arm discrepancy is unresolved. The figures describe diagnostic groups. Treatment-group sizes are separate.
Zh Nevrol Psikhiatr Im S S Korsakova. 108(4):38–48 · Journal publication
Animal research · 2013
Selank in rat and primate fatigue models
- Rats
- The abstract reports a short-lived change in fatigue-like behavior after Selank.
- Primates
- The authors reported a gradual increase in task performance and changes in EEG after repeated intranasal dosing.
The abstract reports a short-lived change in fatigue-like behavior after Selank.
Study notes · methods, sources and limitations
Participants or model Rats and monkeys exposed to experimental stressors
Design Conference abstract describing behavioral, EEG, autonomic and motor assessments in an experimental fatigue model. Monkeys received repeated intranasal Selank. The abstract supplies no dose, group sizes or effect estimates.
Important limitations
- The authors modeled selected fatigue-like features in animals. The experiment did not enroll people or validate an ME/CFS model.
6th Russian Symposium on Proteins and Peptides, p. 106 · Publication record
Comparison in people · 2014
A comparison of the anxiolytic effect and tolerability of Selank and phenazepam in anxiety disorders
- Persistence of anxiolytic effect
- One week after the final doseAbsolute change and confidence interval absent from the abstract
An active-comparator report describes anxiety and quality-of-life changes.
Study notes · methods, sources and limitations
Participants or model 60 patients with anxiety/phobic or somatoform disorders
Design 60 patients with anxiety/phobic or somatoform disorders; Selank versus phenazepam.
Important limitations
- Random allocation and blinding are not established from the abstract. Short follow-up and a small comparison cannot establish long-term safety or general cognitive enhancement.
- Values describe this study and its comparison. Unreported effect sizes and missing denominators have not been inferred.
Zh Nevrol Psikhiatr Im S S Korsakova. 114(7):17–22 · Journal publication
About Selank
Names in this research collection
TP-7 · TKPRPGP
A synthetic peptide analogue of tuftsin, a naturally occurring immune-related peptide. Selank has been investigated in anxiety-related and neurobiological research.
Identity / background source ↗
Research background
Tuftsin-derived peptide investigated in anxiety comparisons, stress models and neurochemical assays. Its clinical and laboratory evidence are kept distinct from unverified archival claims.
Autoimmune research: disease-specific findings, immune effects and open questions ↗
Russian ME/CFS and fatigue research ↗
Pregnancy and offspring research
Selank given to adult offspring increased sensory attention by a reported factor of 2–3 and facilitated learning 1.5-fold (both p<0.01). This was treatment after prenatal injury, not administration to pregnant mothers.
Adult offspring treatment cannot establish fetal safety of maternal Selank.
Reported findings and methods ↗ · Pregnancy research: full evidence review and archive ↗
More study findings
Animal research · 2011
Semax and Selank in acute loaded swimming
Study of multiple preparations
- 30 minutes
- Semax +45%; Selank +50%Reported relative to control.
- Four hours
- Semax +110%; Selank +45%The treated groups were distinct.
- 24 hours
- No detected benefit with either peptideThe separate human physiology comparison included 36 participants and did not test either peptide.
Both peptides prolonged swimming at selected early time points. Neither had a reported effect at 24 hours.
Study notes · methods, sources and limitations
Participants or model Rat subgroups of 6–7 per sampling interval. The separate human physiology comparison included 18 athletes and 18 comparison participants without a drug intervention.
Design Forced swim with 20% body-mass load, tested 0.5, 4 or 24 hours after administration. Separate enzyme and biochemical measurements.
- Reported study exposure
- Single intranasal Semax or Selank, 300 µg/kg, 1% solution, 6 µL. Control received distilled water.
Important limitations
- Small subgroups, incomplete uncertainty and extreme swim conditions.
Doctoral dissertation author abstract, methods and animal results · Doctoral dissertation author abstract, methods and animal results
Animal research · 2009
Rat behavioral assays: selank
Study of multiple preparations
- Noopept, Semax, Selank and Dilept · vertical activity
- Reduced vertical movements reportedCompound-specific rat behavior at the stated doses, not a measure of human alertness.
- Porsolt immobility
- Lower with Oleyl-Cortagen, Dilept and Cortexin; higher with Cerebrolysin, Semax, Cortagen and SelankThis unweighted behavior assay is distinct from loaded endurance swimming. Piracetam was inactive in the report.
Separate comparisons in an assay battery.
Study notes · methods, sources and limitations
Participants or model 192 Wistar rats, 200–220 g; methods describe at least 10–12 per group across a behavioral test battery
Design 192 Wistar rats, 200–220 g; methods describe at least 10–12 per group across a behavioral test battery
- Reported study exposure
- 0.1 mg/kg intraperitoneally in the rat study.
Important limitations
- Electrical self-stimulation and immobility do not measure athletic endurance.
- Multiple behavioral comparisons, endpoint-specific group sizes and precise uncertainties need table recovery. Deltaran is the tested DSIP-containing formulation; no result for isolated DSIP can be inferred. The 2015 dissertation used separate doses/routes; it is not confirmed as independent replication of every experiment.
- Opposing effects across assays are informative. Electrical self-stimulation and immobility are behavior readouts, and neither establishes improved human motivation or endurance.
Medical Academic Journal, 2009; publisher article 9357 · Original journal article
Animal research · 2008
Use of Selank to correct measures of integrative brain activity and biogenic amine levels in adult rats resulting from antenatal hypoxia
- Sensory attention
- Reported 2–3-fold increasep<0.01; no n or confidence interval supplied
- Learning
- Reported 1.5-fold facilitationp<0.01
- Monoamine balance
- Investigative behavior and serotonin/noradrenaline balance reportedly restored; exact concentrations absent
Selank given to adult offspring increased sensory attention by a reported factor of 2–3 and facilitated learning 1.5-fold (both p<0.01). This was treatment after prenatal injury, not administration to pregnant mothers.
Study notes · methods, sources and limitations
Participants or model Adult rats exposed to antenatal hypoxia on gestation days 14–16; n not supplied in abstract
Design Adult-offspring behavioral and brain serotonin/noradrenaline assessment after prenatal hypoxia; Selank 300 µg/kg intraperitoneally.
Important limitations
- Adult offspring treatment cannot establish fetal safety of maternal Selank.
- Adult offspring treatment cannot establish fetal safety of maternal Selank. The 2008 English article translates the 2006 Russian paper, PMID 17385425; these are not independent replications. Sample sizes, blinding, litter handling and numerical raw scores are unavailable in the abstract.
Neuroscience and behavioral physiology. 2008;38(2):203. PMID 18197389 · Original journal publication
Lab research · 2017
Studying the Toxic Effects of Some Biologically Active Peptides on the Model of Mouse Embryonic Stem Cells
Study of multiple preparations
- Selank neuronal differentiation
- GABA-positive neuron ratio decreased by 61%Selank 100 µM versus control; not an in-vivo malformation endpoint
- PGP proliferation
- Small but significant inhibition at 10 µMNo numerical inhibition magnitude in abstract
- Semax cell survival
- Increased survival at 10 and 0.1 µM during serum deprivationCell-stress endpoint, not reproductive toxicology
Selank at 100 µM reduced the GABA-positive neuron ratio by 61% versus control. Semax improved cell survival under serum deprivation, while PGP modestly inhibited proliferation at 10 µM. Cell findings cannot substantiate the abstract’s broad fetal-safety conclusion.
More reported outcomes
- Safety-inference limit
- The authors infer no embryonic/fetal toxicity; this culture model does not establish that claim in pregnancy
Study notes · methods, sources and limitations
Participants or model Mouse embryonic stem cells and neuronal derivatives, not pregnant animals or human fetuses
Design Cultured mouse embryonic stem cells; proliferation, survival during serum deprivation and neuronal differentiation after several peptides and growth-factor controls.
Important limitations
- Embryonic-cell experiments do not test placental exposure, whole-embryo development, birth defects or pregnancy outcomes.
- Embryonic-cell experiments do not test placental exposure, whole-embryo development, birth defects or pregnancy outcomes. The study also found reduced cell differentiation and proliferation. Concentrations in a culture dish are not human doses; biological replicate counts and complete numerical results absent from the abstract.
Bulletin of experimental biology and medicine. 2017;163(6):731. PMID 29063333 · Original journal publication
Comparison in people · 2015
Optimization of the treatment of anxiety disorders with selank
- Anxiety improvement
- Earlier with add-on SelankNo numerical magnitude reported
- Sedation and other adverse symptoms
- Fewer reported with the combinationEvent counts not supplied
The authors report earlier symptom improvement and fewer unwanted effects with adjunctive Selank. Both groups received phenazepam.
Study notes · methods, sources and limitations
Participants or model 70 patients: 40 Selank plus phenazepam; 30 phenazepam alone
Design 70 patients: phenazepam alone 30 versus phenazepam plus Selank 40.
Important limitations
- Does not isolate Selank monotherapy. Allocation and blinding unresolved; a combination comparison is not general evidence of safety.
- Both groups received phenazepam. This comparison does not isolate Selank monotherapy.
Zh Nevrol Psikhiatr Im S S Korsakova. 2015;115(6):33–40 · Indexed abstract
Animal research · 2022
Selank, a Peptide Analog of Tuftsin, Attenuates Aversive Signs of Morphine Withdrawal in Rats.
- Total withdrawal index reduction
- 39.6% Selank versus 49.3% diazepam
- Tactile sensitivity threshold
- Ninefold versus thirteenfold increase
- Convulsions, ptosis and posture disorders
- Attenuation reported with Selankp<0.0001
Selank reduced the overall withdrawal score by 39.6%, compared with 49.3% for diazepam. It also reduced several physical withdrawal signs. This is an animal-model finding, not a clinical withdrawal treatment.
Study notes · methods, sources and limitations
Participants or model Rats with naloxone-triggered morphine withdrawal
Design Rat morphine-withdrawal model; single IP Selank 0.3 mg/kg versus diazepam 2 mg/kg.
Important limitations
- Animal and laboratory findings do not establish benefit in people. Abstract only. Full methods, sample-size details and adverse-event tables were outside the review.
- Animal dependence model; no human withdrawal regimen or efficacy is established.
Bulletin of experimental biology and medicine · Indexed abstract
Animal research · 2020
Morphological Changes in the Large Intestine of Rats Subjected to Chronic Restraint Stress and Treated with Selank.
- Corticosterone and colon-wall injury
- Reductions reportedNo numerical concentration, injury score or sample size supplied
Selank-treated rats had lower corticosterone and fewer stress-related changes in the colon wall. The study connects stress biology with tissue changes in the gut.
Study notes · methods, sources and limitations
Participants or model Male Wistar rats exposed to restraint stress
Design Male Wistar rats with restraint stress; IP Selank 80, 250 or 750 micrograms/kg 15 minutes before exposure.
Important limitations
- Animal and laboratory findings do not establish benefit in people. Abstract only. Full methods, sample-size details and adverse-event tables were outside the review.
- Values describe this study and its comparison. Unreported effect sizes and missing denominators have not been inferred.
Bulletin of experimental biology and medicine · Indexed abstract
Animal research · 2019
Selank, Peptide Analogue of Tuftsin, Protects Against Ethanol-Induced Memory Impairment by Regulating of BDNF Content in the Hippocampus and Prefrontal Cortex in Rats.
- Object recognition in non-ethanol nine-month-old rats
- Improvement reportedp<0.05
- Ethanol-withdrawal memory/attention disturbances
- Prevention reportedp<0.01
- Ethanol-associated BDNF increase
- Prevented in hippocampus and frontal cortexp<0.05
Selank improved object-recognition performance during alcohol withdrawal and prevented the ethanol-associated rise in BDNF in the hippocampus and frontal cortex. This finding concerns normalization in this model, not a general increase in BDNF.
Study notes · methods, sources and limitations
Participants or model Rats exposed to 10% ethanol as their only fluid for 30 weeks
Design Rats exposed to 10% ethanol as sole fluid for 30 weeks; Selank 0.3 mg/kg/day IP for seven days. Object-recognition test and ex-vivo BDNF assays.
Important limitations
- Animal and laboratory findings do not establish benefit in people. Abstract only. Full methods, sample-size details and adverse-event tables were outside the review.
- No numerical behavioral effect size is supplied. This is normalization of an ethanol-associated BDNF increase, not a claim that Selank universally raises BDNF.
Bulletin of experimental biology and medicine · Indexed abstract
Animal research · 2019
Effect of Selank on Morphological Parameters of Rat Liver in Chronic Foot-Shock Stress.
- Degenerative liver changes
- Reduced at all three doses
- Nucleus/cytoplasm ratio
- Restored at 300 and 1,000 micrograms/kg
- Strongest reported stress-limiting effect
- 300 micrograms/kgMiddle tested dose; no numerical histology effect size supplied
Selank reduced stress-related liver-cell damage at all tested doses. The strongest reported effect occurred at the middle dose, 300 micrograms/kg; the response was not simply greater at higher doses.
Study notes · methods, sources and limitations
Participants or model Male Wistar rats under chronic foot-shock stress
Design Male Wistar rats with foot-shock stress; IP Selank 100, 300 or 1,000 micrograms/kg 15 minutes before each session.
Important limitations
- Animal and laboratory findings do not establish benefit in people. Abstract only. Full methods, sample-size details and adverse-event tables were outside the review.
- Values describe this study and its comparison. Unreported effect sizes and missing denominators have not been inferred.
Bulletin of experimental biology and medicine · Indexed abstract
Animal research · 2019
State of Colon Microbiota in Rats during Chronic Restraint Stress and Selank Treatment.
- Gut microbiota
- Restoration reportedNo bacterial abundance percentages or species-level effect sizes in the abstract
Stress shifted the balance of intestinal bacteria. The authors report that Selank restored the microbiota toward its usual composition; the abstract does not provide species-level changes or numerical effect sizes.
Study notes · methods, sources and limitations
Participants or model Male Wistar rats under chronic restraint stress
Design Male Wistar rats with chronic restraint stress; IP Selank 80, 250 or 750 micrograms/kg 15 minutes before exposure.
Important limitations
- Animal and laboratory findings do not establish benefit in people. Abstract only. Full methods, sample-size details and adverse-event tables were outside the review.
- Values describe this study and its comparison. Unreported effect sizes and missing denominators have not been inferred.
Bulletin of experimental biology and medicine · Indexed abstract
- Compound class
- Synthetic regulatory neuropeptide
- Research collection
- Neuropeptide research · editorial grouping
- Research institutions
- No institutional affiliation recorded
- Source review
- Review dates and the material assessed are listed with each publication below.
Understanding the evidence
Human research
Small active-comparator anxiety studies and imaging
Study methods
Study-specific design and limitations below
Independent replication
Independent replication and participant overlap are unclear
Source access
Indexed abstracts, selected publisher text and archival records
Safety evidence
Long-term safety and product equivalence not established by this collection
Open a topic for the evidence assessment.
Patents and claimed inventions
These 4 grouped records distinguish claimed molecules, uses, formulations and related chemistry. Patent disclosure does not establish clinical benefit or approval.
Status is an indexed snapshot, not an official legal assessment. Search the patent collection and read the method →
Linked sources
Explore the research map and unresolved leads ↗
Related compound research
Follow shared publications or research classes. These links do not establish equivalent effects between compounds.
Research collection curated by @PepMariner · editorial standards. Send a source correction ↗
Browse bibliography & PDFs ↗