In vitro and in vivo pro-angiogenic effects of thymosin-β4-derived peptides

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.

► Thymosin-β4 (Tβ4) is a G-actin sequestering peptide involved in regeneration and remodeling of injured tissues.
► TYB4-n, TYB4-i, and TYB4-c have been evaluated in vitro and in vivo for pro-angiogenic effects.
► These effects are related to the activation of several signaling pathways and are modulated by the N-terminus of Tβ4.