C-terminal Pro-Gly-Pro tripeptide in contrast to full-length neuropeptide semax exhibits no neuroprotective effect in experimental cerebral ischemia.
Fadyukova. O E OE; Kadi. A A; Bai. Ou O; Andzhusheva. G M GM; Koshelev. V B VB
Key Findings
- The Pro‑Gly‑Pro fragment alone did not reduce neurological deficits or death in rats with cerebral ischemia.
- Full‑length semax’s neuroprotective effect is mainly due to its ACTH4‑7 segment.
- The fragment’s lack of effect suggests it’s not a viable standalone supplement for brain protection.
Practical Outcomes
- If you’re considering semax for brain health, use the complete peptide rather than isolated fragments. The study doesn’t change dosing or timing recommendations, but it warns against expecting benefits from the tiny Pro‑Gly‑Pro piece alone.
Summary
A study in rats showed that just the tiny Pro‑Gly‑Pro piece of the brain‑boosting peptide semax doesn’t protect against stroke‑like damage, meaning the protective effects come from the larger ACTH4‑7 part of the molecule. For DIY health enthusiasts, this means the short fragment isn’t useful on its own, and any neuroprotective benefits likely require the full semax peptide.
Abstract
The C-terminal fragment Pro-Gly-Pro of semax does not modulate the development of symptoms of neurological deficiency and mortality in rats with incomplete global cerebral ischemia. Hence, previously revealed neuroprotective effects of semax are mainly determined by corticotropin ACTH4-7 fragment.
Study Information
pubmed
2005
2005-04-01T00:00:00.000Z
10.1007/s10517-005-0311-5
2
7