title: Collagen I membranes for tendon repair: effect of collagen fiber orientation on cell behavior.
abstract: Tendons have poor spontaneous regenerative capabilities, and complete regeneration is never achieved despite intensive remodeling. In this in vitro study, we characterized two multilamellar collagen I membranes differing in the arrangement of collagen fiber deposition (oriented vs. nonoriented) and compared their mechanical properties. Human dermal fibroblasts and tenocytes were seeded on the two membranes to evaluate the effect of fiber orientation on cell viability and cytoskeletal organization. Results demonstrate that the multilamellar collagen I membrane with oriented fibers has the better mechanical properties and affords optimum cell proliferation and adhesion. Its fiber arrangement provides an instructive pattern for cell growth and may serve to guide the alignment of cells migrating from the ends of a crushed or frayed tendon to obtain a strong, correctly structured tendon, thus providing a viable clinical option for tendon repair.
authors.affiliation: Orthopaedics Clinic, School of Medicine, Marche Polytechnic University, Via Tronto 10/A, Ancona 60020, Italy.
authors.forename: Antonio
authors.initials: A
authors.lastname: Gigante
authors.forename: Eugenio
authors.initials: E
authors.lastname: Cesari
authors.forename: Alberto
authors.initials: A
authors.lastname: Busilacchi
authors.forename: Sandra
authors.initials: S
authors.lastname: Manzotti
authors.forename: Kyriaki
authors.initials: K
authors.lastname: Kyriakidou
authors.forename: Francesco
authors.initials: F
authors.lastname: Greco
authors.forename: Roberto
authors.initials: R
authors.lastname: Di Primio
authors.forename: Monica
authors.initials: M
authors.lastname: Mattioli-Belmonte
mesh_terms: D001696:Biomechanical Phenomena; D040761:Biomimetic Materials; D002448:Cell Adhesion / Q000502:physiology; D002455:Cell Division / Q000502:physiology; D002465:Cell Movement / Q000502:physiology; D002470:Cell Survival / Q000502:physiology; D002478:Cells, Cultured; D024042:Collagen Type I / Q000502:physiology* / Q000648:ultrastructure; D020405:Dermis / Q000166:cytology; D005347:Fibroblasts / Q000166:cytology / Q000502:physiology / Q000648:ultrastructure; D006801:Humans; D066298:In Vitro Techniques; D008567:Membranes, Artificial; D018613:Microscopy, Confocal; D008855:Microscopy, Electron, Scanning; D012038:Regeneration / Q000502:physiology; D013708:Tendon Injuries / Q000473:pathology / Q000503:physiopathology*; D013710:Tendons / Q000166:cytology / Q000502:physiology*; D013718:Tensile Strength / Q000502:physiology; D054457:Tissue Scaffolds
chemical_list: D024042:Collagen Type I; D008567:Membranes, Artificial