[Effects of nootropic drugs on behavior of BALB/c and C57BL/6 mice in the exploratory cross-maze test].
Vasil'eva. E V EV; Salimov. R M RM; Kovalev. G I GI
Key Findings
- BALB/c mice are more anxious and explore less than C57BL/6 mice.
- Semax improved exploratory behavior and reduced anxiety in BALB/c mice.
- No significant effect of semax was observed in the less‑anxious C57BL/6 strain.
Practical Outcomes
- For biohackers, the data suggest semax might have anxiety‑reducing and motivation‑boosting effects, but only in individuals who start with higher baseline anxiety. Because the evidence comes from mice, any human use would be experimental and should start with low doses while monitoring mood and activity. More human‑focused research is needed before recommending a specific protocol.
Summary
In a mouse study, the peptide semax (along with several other nootropics) helped a strain of mice that is naturally more anxious (BALB/c) explore new environments better and feel less anxious. The same effect was not seen in a less‑anxious mouse strain (C57BL/6).
Abstract
Exploratory behavior, locomotor activity, and anxiety in inbred mice of C57BL/6 and BALB/c strains subchronically treated with placebo or various types of nootropic (cognition enhancing) drugs (piracetam, phenotropil, noopept, semax, pantogam, nooglutil) have been evaluated using the exploratory cross-maze test. It was found that BALB/c mice in comparison to C57BL/6 mice are characterized by greater anxiety and lower efficiency of exploratory behavior in the previously unfamiliar environment. All tested drugs clearly improved the exploratory behavior in BALB/c mice only. In BALB/c mice, piracetam, phenotropil, noopept, and semax also reduced anxiety, while phenotropil additionally increased locomotor activity. Thus, the nootropic drugs displayed clear positive modulation of spontaneous orientation in the mice strain with initially low exploratory efficiency (BALB/c) in the cross-maze test. Some drugs (pantogam, nooglutil) exhibited only nootropic properties, while the other drugs exhibited both nootropic effects on the exploratory activity and produced modulation of the anxiety level (piracetam, fenotropil, noopept, semax) and locomotor activity (fenotropil).
Study Information
pubmed
2012