Thymosin-like peptides as potential immunostimulants. Synthesis via the polymeric-reagent method.
Mokotoff. M M; Zhao. M M; Roth. S M SM; Shelley. J A JA; Slavoski. J N JN; Kouttab. N M NM
Key Findings
- Three thymosin‑like peptides were synthesized using a polymeric‑reagent method.
- The peptides were evaluated for their ability to stimulate RNA and DNA synthesis in human T lymphocytes.
- None of the new peptides showed a significant increase in T‑cell activation or proliferation compared to thymosin‑alpha‑1 or thymopentin.
Practical Outcomes
- These particular peptide analogs should not be added to a self‑experiment or supplementation routine because they offer no added benefit over the standard thymosin‑alpha‑1. For biohackers seeking immune support, sticking with the proven thymosin‑alpha‑1 formulation remains the sensible approach.
Summary
Scientists created three new peptide versions that look like thymosin‑alpha‑1, but when they tested them they didn’t boost T‑cell activity any more than the original peptide, so they aren’t useful for immune‑boosting hacks.
Abstract
This paper reports our attempt at designing new immunostimulating peptides which are chemically related to the bioactive peptides thymosin alpha 1 and thymopentin. Three peptides were synthesized, Asp-Leu-Lys-Glu-Arg-Lys-Asp-Val-Tyr (3), Arg-Lys-Asp-Val-Tyr-Glu-Glu-Ala-Glu-Asn (2), and Asp-Leu-Lys-Glu-Arg-Lys-Asp-Val-Tyr-Glu-Glu-Ala-Glu-Asn (1), each of which contains the thymopentin sequence and portions of the bioactive sequence of thymosin alpha 1. Peptides 1-3 were assembled from selected blocked fragments that were synthesized by the polymeric-reagent method, using PHBT (polystyrene-bound 1-hydroxybenzotriazole) as the activating polymer. The ability of peptides 1-3 to enhance the activation (RNA synthesis) and proliferation (DNA synthesis) of human T lymphocytes was determined. In comparison to thymosin alpha 1, thymosin alpha 1 (15-28), and thymopentin, peptides 1-3 did not show significant enhancement of these processes.
Study Information
pubmed
1990
10.1021/jm00163a057