title: Definition of a sequence, RYVVLPR, within laminin peptide F-9 that mediates metastatic fibrosarcoma cell adhesion and spreading.
abstract: A synthetic peptide from the inner globule of the B1 chain of laminin, termed peptide F-9 (RYVVLPRPVCFEKGMNYTVR; residues 641-660), has been shown to have heparin-binding and cell adhesion-promoting activities for diverse cell types (Charonis et al., J. Cell. Biol., 107: 1253-1260, 1988). In this study, the metastatic murine fibrosarcoma cell line, UV-2237-MM, adhered and spread on surfaces coated with laminin and peptide F-9 in a concentration- and time-dependent fashion. Cells migrated toward laminin in Boyden microchemotaxis chambers but not toward peptide F-9. However, exogenous soluble peptide F-9 inhibited both the adhesion and migration of cells toward laminin. Polyclonal antibodies raised against peptide F-9 were capable of inhibiting laminin-mediated cell adhesion and migration. Peptide F-9 is located 265 residues from CDPGYIGSR, another sequence on the B1 chain of laminin which has been reported by others to promote cell adhesion (Graft et al., Cell, 48: 989-996, 1987). In contrast to peptide F-9, various control peptides including CDPGYIGSR did not promote the adhesion, spreading, or migration of the UV-2237-MM fibrosarcoma cells. In addition, neither exogenous peptide CDPGYIGSR nor antibodies raised against peptide CDPGYIGSR were capable of inhibiting laminin-mediated cell adhesion or migration. These results indicate that peptide F-9, but not peptide CDPGYIGSR, represents a major fibrosarcoma cell adhesion-promoting domain on intact laminin. A series of overlapping peptides were synthesized which contained various portions of the parent peptide F-9. The use of these peptides in cell adhesion assays demonstrated that the sequence RYVVLPR from the amino terminus of peptide F-9 was essential for cell adhesion-promoting activity.
authors: Department of Laboratory Medicine and Pathology, University of Minnesota Medical School, Minneapolis 55455.
authors: A P
authors: AP
authors: Skubitz
authors: J B
authors: JB
authors: McCarthy
authors: Q
authors: Q
authors: Zhao
authors: X Y
authors: XY
authors: Yi
authors: L T
authors: LT
authors: Furcht
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002448:Cell Adhesion / Q000187:drug effects; D002465:Cell Movement / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D005354:Fibrosarcoma / Q000503:physiopathology*; D006801:Humans; D066298:In Vitro Techniques; D007680:Kidney Neoplasms / Q000503:physiopathology*; D007797:Laminin / Q000737:chemistry* / Q000494:pharmacology; D051379:Mice; D008969:Molecular Sequence Data; D009362:Neoplasm Metastasis; D010446:Peptide Fragments / Q000737:chemistry* / Q000494:pharmacology; D013997:Time Factors
chemical_list: D007797:Laminin; D010446:Peptide Fragments; C066529:laminin F9