title: Evaluation of angiogenesis of bioactive glass in the arteriovenous loop model.
abstract: In this study, the angiogenetic effect of sintered 45S5 Bioglass® was quantitatively assessed for the first time in the arteriovenous loop (AVL) model. An AVL was created by interposition of a venous graft from the contralateral side between the femoral artery and vein in the medial thigh of eight rats. The loop was placed in a Teflon isolation chamber and was embedded in a sintered 45S5 Bioglass® granula matrix filled with fibrin gel. Specimens were investigated 3 weeks postoperatively by means of microcomputed tomography, histological, and morphometrical techniques. All animals tolerated the operations well. At 3 weeks, both microcomputed tomography and histology demonstrated a dense network of newly formed vessels originating from the AVL. All constructs were filled with cell-rich, highly vascularized connective tissue around the vascular axis. Analysis of vessel diameter revealed constant small vessel diameters, indicating immature new vessel sprouts. This study shows for the first time axial vascularization of a sintered 45S5 Bioglass® granula matrix. After 3 weeks, the newly generated vascular network already interfused most parts of the scaffolds and showed signs of immaturity. The intrinsic type of vascularization allows transplantation of the entire construct using the AVL pedicle.
authors.affiliation: Department of Plastic and Hand Surgery, University of Erlangen Medical Center, Erlangen, Germany. andreas.arkudas@uk-erlangen.de
authors.forename: Andreas
authors.initials: A
authors.lastname: Arkudas
authors.forename: Amelie
authors.initials: A
authors.lastname: Balzer
authors.forename: Gregor
authors.initials: G
authors.lastname: Buehrer
authors.forename: Isabel
authors.initials: I
authors.lastname: Arnold
authors.forename: Alexander
authors.initials: A
authors.lastname: Hoppe
authors.forename: Rainer
authors.initials: R
authors.lastname: Detsch
authors.forename: Phillipa
authors.initials: P
authors.lastname: Newby
authors.forename: Tobias
authors.initials: T
authors.lastname: Fey
authors.forename: Peter
authors.initials: P
authors.lastname: Greil
authors.forename: Raymund E
authors.initials: RE
authors.lastname: Horch
authors.forename: Aldo R
authors.initials: AR
authors.lastname: Boccaccini
authors.forename: Ulrich
authors.initials: U
authors.lastname: Kneser
mesh_terms: D000818:Animals; D001164:Arteriovenous Fistula; D002516:Ceramics / Q000494:pharmacology*; D004195:Disease Models, Animal; D005898:Glass; D008297:Male; D018919:Neovascularization, Physiologic / Q000187:drug effects*; D051381:Rats; D011917:Rats, Inbred Lew; D013997:Time Factors
chemical_list: C425330:bioactive glass 45S5