Several viruses are known to utilize cellular integrin molecules to gain entry into cells. Because of the ability of herpes simplex virus type 1 (HSV-1) to disrupt cellular adhesion, as seen particularly in ocular infections, we examined the ability of several peptides, containing known integrin recognition sequences, to interfere with plaque formation of HSV-1 in epithelial cells. We also examined the possible involvement of tachykinins in virus entry. We did not detect any decrease in plaque formation by HSV-1 in the presence of Arg-Gly-Asp, Asp-Gly-Glu-Ala, or EILDV peptides or in the presence of monoclonal antibodies to the human β1 or β4 integrin subunit. Substance P or inhibitors of the NK1 or NK2 tachykinin receptors also had no inhibitory effects on HSV-1 plaque formation.

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