In vitro and in vivo pro-angiogenic effects of thymosin-β4-derived peptides.
Dettin. Monica M; Ghezzo. Francesca F; Conconi. Maria Teresa MT; Urbani. Luca L; D'Auria. Gabriella G; Falcigno. Lucia L; Guidolin. Diego D; Nico. Beatrice B; Ribatti. Domenico D; Di Bello. Carlo C; Parnigotto. Pier Paolo PP
Key Findings
- All three fragments keep the native conformation of thymosin‑beta‑4
- Each fragment promotes angiogenesis both in vitro and in vivo
- The N‑terminal fragment especially boosts the effect by activating several cell‑signaling pathways
Practical Outcomes
- The findings hint that thymosin‑beta‑4 fragments could eventually help with tissue repair or anti‑aging by enhancing blood‑vessel formation, but there are no human studies, dosing guidelines, or safety data yet, so they’re not ready for personal use or protocol development.
Summary
Scientists created three short pieces of the protein thymosin‑beta‑4 and showed that each piece can still form the same shape as the full protein and can stimulate new blood‑vessel growth in lab dishes and in animal tests.
Abstract
Thymosin-β4 (Tβ4) is a G-actin sequestering peptide involved in regeneration and remodeling of injured tissues. In this work, we have designed and synthesized three peptide sequences containing the N-terminus (TYB4-n), the central part (TYB4-i) or the C-terminus (TYB4-c) of Tβ4. All fragments are overlapping on the main central binding actin site. After a structural characterization, we have evaluated in vitro and in vivo their pro-angiogenic effects. The results of this study have shown that: (i) each fragment reproduces the native conformation; (ii) Tβ4-derived peptides exert both in vitro and in vivo pro-angiogenic effects; (iii) their in vitro effect seem to be related to the activation of several signaling pathways and is positively modulated by the N-terminus of Tβ4.
Study Information
pubmed
2011
2011-07-29T00:00:00.000Z
10.1016/j.cellimm.2011.07.008
8
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