Fibronectin Adhesion-promoting Peptide (Heparin Binding Peptide) is one of the heparin-binding amino acid sequences found in the carboxy-terminal heparin-binding domain of fibronectin. It promotes assembly of mesenchymal stem cell (MSC) spheroids into larger aggregates. Fibronectin Adhesion-promoting Peptide directly promotes the adhesion, spreading, and migration of endothelial cells by reacting with heparin binding domains of cells^[1][2]. In Vitro: GRGDS and Fibronectin Adhesion-promoting Peptide (Heparin Binding Peptide: WQPPRARI) micropatterns increase the endothelialisation of prosthetic materials in vitro. Fibronectin Adhesion-promoting Peptide also enhances haptotactic cell migration. The anti-apoptotic effects of fibronectin require the presence of the WQPPRARI sequence, which may be due to synergistic survival signals mediated by this sequence and by the RGD motif^[1].
RDGS and Fibronectin Adhesion-promoting Peptide promote cell adhesion through different activation pathways that induce different forms of adhesion which can be highlighted through the analysis of focal and fibrillar contacts^[2].