Vascularization and biocompatibility of poly(ε-caprolactone) fiber mats for rotator cuff tear repair

Autoři: Sarah Gniesmer aff001;  Ralph Brehm aff003;  Andrea Hoffmann aff002;  Dominik de Cassan aff005;  Henning Menzel aff005;  Anna Lena Hoheisel aff002;  Birgit Glasmacher aff002;  Elmar Willbold aff002;  Janin Reifenrath aff002;  Nils Ludwig aff008;  Ruediger Zimmerer aff001;  Frank Tavassol aff001;  Nils-Claudius Gellrich aff001;  Andreas Kampmann aff001
Působiště autorů: Department of Oral and Maxillofacial Surgery, Hannover Medical School, Hannover, Germany aff001;  NIFE—Lower Saxony Centre for Biomedical Engineering, Implant Research and Development, Hannover, Germany aff002;  Institute for Anatomy, University of Veterinary Medicine Hannover, Hannover, Germany aff003;  Department of Orthopedic Surgery, Laboratory for Biomechanics and Biomaterials, Graded Implants and Regenerative Strategies, Hannover Medical School, Hannover, Germany aff004;  Institute for Technical Chemistry, Braunschweig University of Technology, Braunschweig, Germany aff005;  Institute of Multiphase Processes, Leibniz University Hannover, Hannover, Germany aff006;  Department of Orthopedic Surgery, Hannover Medical School, Hannover, Germany aff007;  Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States of America aff008
Vyšlo v časopise: PLoS ONE 15(1)
Kategorie: Research Article


Rotator cuff tear is the most frequent tendon injury in the adult population. Despite current improvements in surgical techniques and the development of grafts, failure rates following tendon reconstruction remain high. New therapies, which aim to restore the topology and functionality of the interface between muscle, tendon and bone, are essentially required. One of the key factors for a successful incorporation of tissue engineered constructs is a rapid ingrowth of cells and tissues, which is dependent on a fast vascularization. The dorsal skinfold chamber model in female BALB/cJZtm mice allows the observation of microhemodynamic parameters in repeated measurements in vivo and therefore the description of the vascularization of different implant materials. In order to promote vascularization of implant material, we compared a porous polymer patch (a commercially available porous polyurethane based scaffold from Biomerix) with electrospun polycaprolactone (PCL) fiber mats and chitosan-graft-PCL coated electrospun PCL (CS-g-PCL) fiber mats in vivo. Using intravital fluorescence microscopy microcirculatory parameters were analyzed repetitively over 14 days. Vascularization was significantly increased in CS-g-PCL fiber mats at day 14 compared to the porous polymer patch and uncoated PCL fiber mats. Furthermore CS-g-PCL fiber mats showed also a reduced activation of immune cells. Clinically, these are important findings as they indicate that the CS-g-PCL improves the formation of vascularized tissue and the ingrowth of cells into electrospun PCL scaffolds. Especially the combination of enhanced vascularization and the reduction in immune cell activation at the later time points of our study points to an improved clinical outcome after rotator cuff tear repair.

Klíčová slova:

Biomaterial implants – Macrophages – Medical implants – Polymers – Porous materials – Tendons – Tissue repair – White blood cells


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