[Long-lasting behavioral effects of chronic neonatal treatment with ACTH (4-10) analogue semax in white rat pups].
Sebentsova. E A EA; Denisenko. A V AV; Levitskaia. N G NG; Andreeva. L A LA; Kamenskiĭ. A A AA; Miasoedov. N F NF
Key Findings
- Daily neonatal injection of semax (0.05 mg/kg) from days 8‑21 after birth.
- At 4‑8 weeks old, treated rats showed higher exploratory activity and lower anxiety.
- Semax‑treated rats performed better in a passive avoidance learning test.
Practical Outcomes
- For biohackers, the study hints that semax may have long‑term brain‑modulating effects, but it was only tested in newborn rats, so it doesn't provide a clear, safe protocol for adult use. More human‑focused research is needed before considering semax for cognitive or mood enhancement.
Summary
In a study on baby rats, giving the peptide semax every day for two weeks after birth led to lasting changes: the rats were more curious, less anxious, and learned better later on. This suggests semax can influence brain development, but the research was done in newborn rats, not humans.
Abstract
It is well known that ACTH/MSH-like peptides (melanocortins) have neurotrophic and neuroprotective effects on the central and peripheral nervous systems in the early postnatal life. The aim of present work was to study consequences of the ACTH (4-10) analogue Semax influence on the developing brain. The work was carried out in white rat pups. The peptide (0.05 mg/kg, i/p) was injected daily on the 8th-21st postnatal days. Delayed long-lasting effects of such treatment on animal behavior were revealed. At the age of four to eight weeks, Semax-treated rats displayed elevated exploratory activity, decreased anxiety level and improved passive avoidance conditioning. The results suggest that neonatal Semax administration modulates the development of the central nervous system.
Study Information
pubmed
2005