Effects of controlled fibronectin surface orientation on subsequent Staphylococcus epidermidis adhesion

Area of Science:

• Biomaterials Science
• Microbiology
• Surface Chemistry

Background:

• Staphylococcus epidermidis (SE) adheres to fibronectin (FN) via cell receptors.
• The impact of protein orientation on bacterial adhesion is not well understood.

Purpose of the Study:

• To develop a method for orienting fibronectin (FN) on surfaces.
• To investigate how FN orientation influences Staphylococcus epidermidis (SE) adhesion.

Main Methods:

• Surface modification using biotinylated monoclonal antibodies (Mabs) to orient FN.
• Quantification of SE adhesion to oriented FN using static adhesion assays.
• ELISA to confirm FN orientation.

Main Results:

• A protocol was established to orient FN on surfaces using Mabs targeting its termini.
• SE adhesion increased when FN was bound via its C-terminus, leaving the NH3-terminus exposed.
• This suggests SE receptors specifically bind to the NH3-terminus of FN.

Conclusions:

• Monoclonal antibodies can precisely orient fibronectin on surfaces.
• Bacterial adhesion of SE to fibronectin is controllable by protein orientation.
• This technique offers insights into bacterial adhesion mechanisms and biomaterial design.