[Thymosin alpha(1)--an endogenous modulator of alpha-thrombin recognition site].
Dugina. T N TN; Strukova. S M SM; Khlgatian. S V SV; Ashmarin. I P IP
Key Findings
- Thymosin‑alpha‑1 blocks fibrinogen clotting activity of alpha‑thrombin without affecting its basic enzymatic activity
- It suppresses the rise in intracellular pH that thrombin normally causes in rat mast cells, similar to heparin
- Beta/gamma‑thrombin lacking the extra binding site only lowers pH, indicating the importance of that site for the observed effects
Practical Outcomes
- At present there are no direct, actionable protocols for biohackers; the findings are mainly mechanistic and suggest that thymosin‑alpha‑1 could influence clotting pathways, but more research is needed before any health‑or performance recommendations can be made.
Summary
The study shows that the natural peptide thymosin‑alpha‑1 can interfere with a specific form of the clot‑forming enzyme thrombin, reducing its ability to clot fibrinogen and altering cell pH responses, but it doesn’t provide any guidance on how to use the peptide for health or performance benefits.
Abstract
Thymosin alpha 1-inhibited fibrinogen clotting activity of alpha-thrombin, but not amidolysis of H-D-Phe-Pip-Arg-pNA. Modulation of thrombin interaction with rat peritoneal mast cells (RPMC) by suppressors of additional recognition binding site (thymosin and heparin) was studied. Thrombin-induced pHi changes of RPMC were controlled with pH-sensitive fluorescent dye, BCECF. Thrombin caused a biphasic changes in pHi: rapid cell acidification (0.02) followed by slow alkalinization (0.06 above baseline for 18 min). Thymosin suppressed thrombin-induced pHi increase above resting level. Similar changes in pHi were observed after modification of additional recognition binding site by heparin. Beta/gamma-thrombin with disrupted additional binding site was shown to induce only a decrease of pHi. It is concluded that thymosin alpha 1 is endogenous modulator of alpha-thrombin activity.
Study Information
pubmed
1992