title: Alignment of the Fibrin Network Within an Autologous Plasma Clot.
abstract: Autologous plasma clots with longitudinally aligned fibrin fibers could serve as a scaffold for longitudinal axonal regrowth in cases of traumatic peripheral nerve injuries. Three different techniques for assembling longitudinally oriented fibrin fibers during the fibrin polymerization process were investigated as follows: fiber alignment was induced by the application of either a magnetic field or-as a novel approach-electric field or by the induction of orientated flow. Fiber alignment was characterized by scanning electron microscopy analysis followed by image processing using fast Fourier transformation (FFT). Besides FFT output images, area xmin to xmax, as well as full width at half maximum (FWHM) of the FFT graph plot peaks, was calculated to determine the relative degree of fiber alignment. In addition, fluorescently labeled human fibrinogen and mesenchymal stem cells (MSCs) were used to visualize fibrin and cell orientation in aligned and nonaligned plasma clots. Varying degrees of fiber alignment were achieved by the three different methods, with the electric field application producing the highest degree of fiber alignment. The embedded MSCs showed a longitudinal orientation in the electric field-aligned plasma clots. The key feature of this study is the ability to produce autologous plasma clots with aligned fibrin fibers using physical techniques. This orientated internal structure of an autologous biomaterial is promising for distinct therapeutic applications, such as a guiding structure for cell migration and growth dynamics.
authors.affiliation: 1 Department of Trauma Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum , Bochum, Germany .|2 Department of Surgical Research, BG University Hospital Bergmannsheil, Ruhr University Bochum , Bochum, Germany .
authors.forename: Jan
authors.initials: J
authors.lastname: Gessmann
authors.affiliation: 1 Department of Trauma Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum , Bochum, Germany .|2 Department of Surgical Research, BG University Hospital Bergmannsheil, Ruhr University Bochum , Bochum, Germany .
authors.forename: Dominik
authors.initials: D
authors.lastname: Seybold
authors.affiliation: 2 Department of Surgical Research, BG University Hospital Bergmannsheil, Ruhr University Bochum , Bochum, Germany .
authors.forename: Elvira
authors.initials: E
authors.lastname: Peter
authors.affiliation: 1 Department of Trauma Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum , Bochum, Germany .
authors.forename: Thomas Armin
authors.initials: TA
authors.lastname: Schildhauer
authors.affiliation: 2 Department of Surgical Research, BG University Hospital Bergmannsheil, Ruhr University Bochum , Bochum, Germany .
authors.forename: Manfred
authors.initials: M
authors.lastname: Köller
mesh_terms: D001777:Blood Coagulation; D004574:Electromagnetic Fields; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005337:Fibrin / Q000737:chemistry / Q000528:radiation effects / Q000648:ultrastructure*; D048091:Guided Tissue Regeneration / Q000295:instrumentation*; D045164:Mesenchymal Stem Cell Transplantation / Q000295:instrumentation*; D010949:Plasma / Q000737:chemistry* / Q000528:radiation effects; D011487:Protein Conformation / Q000187:drug effects; D054457:Tissue Scaffolds
chemical_list: D005337:Fibrin