[Protective antithrombotic effects of proline-containing peptides in the animal body subjected to stress].
Liapina. L A LA; Grigor'eva. M E ME; Andreeva. L A LA; Miasoedov. N F NF
Key Findings
- Intranasal semax prevented stress‑induced hypercoagulation in rats.
- Treatment increased antithrombotic, anticoagulant, and fibrin‑depolymerizing activity.
- Dipeptides (Gly‑Pro, Pro‑Gly) showed the strongest protective effect.
- Repeated immobilization stress normally raises blood coagulability, which semax counteracted.
Practical Outcomes
- The study suggests semax might help protect against stress‑related blood clotting, but it’s only been shown in rats and used as an intranasal injection. For biohackers, this is an interesting lead but not ready for direct use; more human safety and dosing data are needed before trying it as a stress‑or blood‑clotting intervention.
Summary
In rats, giving the peptide semax (and similar short proline‑rich peptides) through the nose before a stressful situation stopped the blood from becoming too clot‑prone. The treatment boosted the body's natural anti‑clotting and clot‑breaking systems, especially with the simple di‑peptides.
Abstract
We discovered that simple proline-containing peptides Gly-Pro, Pro-Gly, Pro-Gly-Pro, and semax had an antistress protective effect on the organism appearing as anticoagulation system activation. Repeated intranasal injection of each of these peptides to rats prior to acute immobilization stress prevented a hypercoagulation response to prolonged stress lasting 60 min. At the same time there was increase of antithrombotic, anticoagulant, and fibrin depolymerization activity and recovery of enzymatic fibrinolytic activity. Dipeptides were found to have the greatest antistress effect. Our results showed that semax had a protective effect against enhanced blood coagulability resulting from repeated immobilization stress.
Study Information
pubmed
2010