The authors prepared three peptides derived from the type III
connecting segment domain (IIICS) of fibronectin: EILDV, EILDVPST, REDV,
and a laminin-related peptide YIGSR. Each peptide inhibited the
experimental tumor metastasis of B16-BL6 melanoma, while EILDV had the
strongest effect. The peptides conjugated with poly(ethylene glycol)
(PEG) were more effective than the unmodified peptides in molar ratio
terms. A mixture composed of PEG hybrids with EILDV, REDV and YIGSR
significantly inhibited tumor metastasis. |