Isothiocyanate-functionalized RGD peptides for tailoring cell-adhesive surface patterns.

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Cell Biology

Background:

• Advances in micro- and nanotechnology necessitate novel methods for biomolecule immobilization.
• RGD peptides are crucial for creating cell-adhesive surfaces in biological and medical fields.

Purpose of the Study:

• To develop a rapid, one-step covalent immobilization method for RGD peptides on various surfaces.
• To demonstrate the applicability of this method for creating cell-attractive surface patterns.

Main Methods:

• Developed a one-step thiourea formation method to covalently bind RGD peptides (fused to an isothiocyanate anchor) to amino-terminated surfaces.
• Utilized fibroblast spreading and focal contact formation to assess peptide functionality.
• Applied the method to surfaces patterned by microcontact printing and chemical etching.

Main Results:

• Successfully immobilized RGD peptides, inducing specific fibroblast spreading and focal contact formation.
• Demonstrated specificity as control peptides and soluble RGD peptide inhibited cell adhesion.
• Showcased successful functionalization of micro-patterned surfaces, with cells selectively adhering to RGD-coated areas.

Conclusions:

• The developed thiourea-based method provides a fast and versatile approach for peptide immobilization on diverse materials.
• This technique effectively creates functional, cell-selective surface patterns for applications in cell biology and medicine.
• Facilitates peptide-functionalization of both large and small surface areas, including micro-patterns.