Selank Reduces Anxiety in Mice by Protecting Their Natural Anti-Anxiety Enkephalins
Selank reduced anxiety-like behavior in anxious BALB/c mice while modifying enkephalin-degrading enzyme activity, with effects depending on the animals' baseline emotional phenotype.
Quick Facts
What This Study Found
Selank reduced anxiety behavior in naturally anxious BALB/c mice while modifying enkephalin-degrading enzyme activity, with the anxiolytic effect phenotype-dependent — working most in animals with the greatest enkephalin degradation.
Key Numbers
How They Did This
Animal behavioral study comparing Selank effects in anxious (BALB/c) versus calm (C57BL/6) mice. Anxiety-like behavior and plasma enkephalin-degrading enzyme activity measured before and after treatment.
Why This Research Matters
The phenotype-dependent response suggests Selank works best in individuals with genuine enkephalin deficiency — a potential biomarker for predicting who will respond to this anxiolytic.
The Bigger Picture
Not all anxiety is the same. Selank's phenotype-dependent efficacy suggests personalized anxiety treatment — using enkephalin degradation as a biomarker to identify patients who will benefit most.
What This Study Doesn't Tell Us
Mouse study using inbred strains. Human anxiety is more complex than mouse strain differences. Small sample inherent to behavioral pharmacology studies.
Questions This Raises
- ?Could enkephalin enzyme levels predict Selank response in human anxiety patients?
- ?Do naturally anxious humans have faster enkephalin degradation?
- ?Would Selank combine well with other anxiolytics for treatment-resistant cases?
Trust & Context
- Key Stat:
- Works where needed Selank specifically helped anxious mice (with fast enkephalin breakdown) but not calm mice — suggesting it corrects a specific biochemical deficit
- Evidence Grade:
- Preliminary animal evidence with phenotype comparison providing insight into Selank's mechanism and potential patient selection.
- Study Age:
- Published in 2002. Selank's phenotype-dependent effects support personalized approaches to peptide anxiolytic therapy.
- Original Title:
- Effects of Selank on behavioral reactions and activities of plasma enkephalin-degrading enzymes in mice with different phenotypes of emotional and stress reactions.
- Published In:
- Bulletin of experimental biology and medicine, 133(2), 133-5 (2002)
- Authors:
- Sokolov, O Yu(4), Meshavkin, V K(2), Kost, N V(5), Zozulya, A A
- Database ID:
- RPEP-00774
Evidence Hierarchy
Tests effects in animals (usually mice or rats), not humans.
What do these levels mean? →Frequently Asked Questions
Does Selank work better for some people than others?
This study suggests yes — it worked specifically in naturally anxious mice. If your anxiety involves rapid destruction of natural anti-anxiety peptides (enkephalins), Selank's protective effect would benefit you most.
Could a blood test predict who Selank would help?
Potentially. This study shows different enkephalin-degrading enzyme levels in anxious versus calm mice. If similar patterns exist in humans, an enzyme test could predict who would respond best to Selank.
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Cite This Study
https://rethinkpeptides.com/research/RPEP-00774APA
Sokolov, O Yu; Meshavkin, V K; Kost, N V; Zozulya, A A. (2002). Effects of Selank on behavioral reactions and activities of plasma enkephalin-degrading enzymes in mice with different phenotypes of emotional and stress reactions.. Bulletin of experimental biology and medicine, 133(2), 133-5.
MLA
Sokolov, O Yu, et al. "Effects of Selank on behavioral reactions and activities of plasma enkephalin-degrading enzymes in mice with different phenotypes of emotional and stress reactions.." Bulletin of experimental biology and medicine, 2002.
RethinkPeptides
RethinkPeptides Research Database. "Effects of Selank on behavioral reactions and activities of ..." RPEP-00774. Retrieved from https://rethinkpeptides.com/research/sokolov-2002-effects-of-selank-on
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.