A20FMDV2 is a selective αvβ6 integrin inhibitor (IC50: 3 nM), with an activity 1,000-fold more selective for αvβ6 than for other RGD-directed integrins (αvβ3, αvβ5, and α5β1). A20FMDV2 can be derived from the foot-and-mouth disease virus. A20FMDV2 can be radiolabeled for the PET imaging of αvβ6 integrin-positive tumors.
References:
[1]. Hausner SH, et al. Use of a peptide derived from foot-and-mouth disease virus for the noninvasive imaging of human cancer: generation and evaluation of 4-[18F]fluorobenzoyl A20FMDV2 for in vivo imaging of integrin alphavbeta6 expression with positron emission tomograp. Cancer Res. 2007 Aug 15;67(16):7833-40.