title: A role for specific collagen motifs during wound healing and inflammatory response of fibroblasts in the teleost fish gilthead seabream.
abstract: Specific sites and sequences in collagen to which cells can attach, either directly or through protein intermediaries, were identified using Toolkits of 63-amino acid triple-helical peptides and specific shorter GXX'GEX″ motifs, which have different intrinsic affinity for integrins that mediate cell adhesion and migration. We have previously reported that collagen type I (COL-I) was able to prime in vitro the respiratory burst and induce a specific set of immune- and extracellular matrix-related molecules in phagocytes of the teleost fish gilthead seabream (Sparus aurata L.). It was also suggested that COL-I would provide an intermediate signal during the early inflammatory response in gilthead seabream. Since fibroblasts are highly involved in the initiation of wound repair and regeneration processes, in the present study SAF-1 cells (gilthead seabream fibroblasts) were used to identify the binding motifs in collagen by end-point and real-time cell adhesion assays using the collagen peptides and Toolkits. We identified the collagen motifs involved in the early magnesium-dependent adhesion of these cells. Furthermore, we found that peptides containing the GFOGER and GLOGEN motifs (where O is hydroxyproline) present high affinity for SAF-1 adhesion, expressed as both cell number and surface covering, while in cell suspensions, these motifs were also able to induce the expression of the genes encoding the proinflammatory molecules interleukin-1β and cyclooxygenase-2. These data suggest that specific collagen motifs are involved in the regulation of the inflammatory and healing responses of teleost fish.
authors.affiliation: Department of Cell Biology and Histology, University of Murcia, Murcia 30100, Spain. pcasbri@um.es
authors.forename: Patricia
authors.initials: P
authors.lastname: Castillo-Briceño
authors.forename: Dominique
authors.initials: D
authors.lastname: Bihan
authors.forename: Michael
authors.initials: M
authors.lastname: Nilges
authors.forename: Samir
authors.initials: S
authors.lastname: Hamaia
authors.forename: José
authors.initials: J
authors.lastname: Meseguer
authors.forename: Alfonsa
authors.initials: A
authors.lastname: García-Ayala
authors.forename: Richard W
authors.initials: RW
authors.lastname: Farndale
authors.forename: Victoriano
authors.initials: V
authors.lastname: Mulero
mesh_terms: D020816:Amino Acid Motifs; D000595:Amino Acid Sequence; D000818:Animals; D002448:Cell Adhesion / Q000187:drug effects; D003094:Collagen / Q000737:chemistry* / Q000276:immunology*; D051546:Cyclooxygenase 2 / Q000235:genetics / Q000378:metabolism; D005347:Fibroblasts / Q000187:drug effects / Q000276:immunology* / Q000473:pathology*; D005786:Gene Expression Regulation / Q000187:drug effects; D006801:Humans; D007249:Inflammation / Q000276:immunology* / Q000473:pathology; D019012:Integrin beta1 / Q000378:metabolism; D053583:Interleukin-1beta / Q000235:genetics / Q000378:metabolism; D008274:Magnesium / Q000494:pharmacology; D008969:Molecular Sequence Data; D010455:Peptides / Q000737:chemistry / Q000276:immunology; D055550:Protein Stability / Q000187:drug effects; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D051192:Receptors, Pattern Recognition / Q000276:immunology; D021541:Sea Bream / Q000276:immunology*; D055672:Static Electricity; D013329:Structure-Activity Relationship; D014945:Wound Healing / Q000187:drug effects / Q000276:immunology*
chemical_list: D019012:Integrin beta1; D053583:Interleukin-1beta; D010455:Peptides; D012333:RNA, Messenger; D051192:Receptors, Pattern Recognition; D003094:Collagen; D051546:Cyclooxygenase 2; D008274:Magnesium