Promoting Microvascular Formation with a VEGF-Mimetic Peptide | Dr. Daniel Gould

Dr. Daniel Gould co-authored this research published in Biomaterials, examining how an engineered hydrogel incorporating a VEGF-mimetic peptide could be used to promote the formation of microvascular networks within tissue-engineered constructs.

Developing a functional blood supply is one of the central challenges in tissue engineering. Without adequate microvascularization, engineered tissues may struggle to receive the oxygen and nutrients necessary for survival, growth, and integration with surrounding tissue.

The researchers investigated a 15-amino-acid peptide known as QK, designed to mimic the angiogenic activity of vascular endothelial growth factor, or VEGF. The peptide was modified and covalently incorporated into polyethylene glycol, or PEG, hydrogels to create a biomaterial capable of delivering localized pro-angiogenic signaling.

The study found that PEG modification increased the peptide's solubility and biological activity. In laboratory testing, the immobilized QK peptide promoted endothelial cell proliferation and angiogenic activity comparable to, and in some settings greater than, hydrogels incorporating VEGF.

The researchers also evaluated the material in vivo. Hydrogels containing the immobilized VEGF-mimetic peptide promoted the development of microvascular structures, demonstrating the potential for a small engineered peptide to encourage vascularization within a biomaterial scaffold.

The research contributes to the development of vascularized tissue-engineering strategies by demonstrating how synthetic biomaterials and targeted biological signals can be combined to influence blood vessel formation and create more biomimetic cellular environments.