title: Mechanical properties of cross-linked collagen meshes after human adipose derived stromal cells seeding.
abstract: The main goal of this study was to evaluate the potential of collagen meshes derived from porcine dermis as scaffolds for repairing pelvic organ prolapses. Mechanical properties of collagen meshes with different cross-linking percentages before and after Adipose Derived Stromal Cells (ADSC) seeding were studied as well as the cell-scaffold interaction. Uniaxial tensile tests of the collagen meshes with three different cross-linking percentages (full-, partial-, and noncross-linked) were carried out along orthogonal directions. Their mechanical properties were studied with the same tests before and after seeding with human derived adipose stem cells (ADSC) after 1 and 7 days. Histological analyses were performed to determine adhesion and proliferation of ADSC. Significant differences in mechanical properties of the unseeded meshes were observed between each orthogonal direction independently of the cross-linking percentage. A better cell adhesion rate was observed in the cross-linked meshes. An increase in the mechanical properties after cell seeding was observed with a direct relation with the degree of cross-linking. All meshes analyzed showed a marked anisotropy that should be taken into account during the surgical procedure. The cross-linking treatment increased cell adhesion and the mechanical properties of the collagen meshes after seeding. These results suggest that the mechanical properties of this type of collagen mesh could be useful as scaffolds for repair of pelvic organ prolapse.
authors.affiliation: Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN, Spain. iochgar@unizar.es
authors.forename: Ignacio
authors.initials: I
authors.lastname: Ochoa
authors.forename: Estefania
authors.initials: E
authors.lastname: Peña
authors.forename: Enrique J
authors.initials: EJ
authors.lastname: Andreu
authors.forename: Maitane
authors.initials: M
authors.lastname: Pérez-Ilzarbe
authors.forename: Jose E
authors.initials: JE
authors.lastname: Robles
authors.forename: Clara
authors.initials: C
authors.lastname: Alcaine
authors.forename: Tania
authors.initials: T
authors.lastname: López
authors.forename: Felipe
authors.initials: F
authors.lastname: Prósper
authors.forename: Manuel
authors.initials: M
authors.lastname: Doblaré
mesh_terms: D000273:Adipose Tissue / Q000166:cytology*; D000818:Animals; D001696:Biomechanical Phenomena / Q000187:drug effects; D018929:Cell Culture Techniques / Q000379:methods*; D003094:Collagen / Q000494:pharmacology*; D003432:Cross-Linking Reagents / Q000494:pharmacology*; D006801:Humans; D007211:Indoles / Q000378:metabolism; D008422:Materials Testing; D013194:Staining and Labeling; D013314:Stress, Mechanical; D017154:Stromal Cells / Q000166:cytology / Q000187:drug effects; D034421:Sus scrofa
chemical_list: D003432:Cross-Linking Reagents; D007211:Indoles; C007293:DAPI; D003094:Collagen