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Microsurgical arterovenous loops and biological templates: A novel in vivo chamber for tissue engineering

✍ Scribed by Benedetto Manasseri; Giuseppe Cuccia; Silvia Moimas; Francesco Stagno D'Alcontres; Francesca Polito; Alessandra Bitto; Domenica Altavilla; Francesco Squadrito; Stefano Geuna; Lucia Pattarini; Lorena Zentilin; Chiara Collesi; Uday Puligadda; Mauro Giacca; Michele Rosario Colonna

Publisher: John Wiley and Sons
Year: 2007
Tongue: English
Weight: 498 KB
Volume: 27
Category: Article
ISSN: 0738-1085
DOI: 10.1002/micr.20415

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✦ Synopsis

Background: Microsurgical tissue engineering is an emerging topic in regenerative medicine. Here we describe a new microsurgical model of bioengineering in rats based on the use of an arterovenous loop (AV) implanted into a commercially available crosslinked collagen/glycosaminoglycan template. Methods: The microvascular loop was created between the femoral artery and vein and covered by the template folded onto itself. The chamber was isolated from the outside tissue by an outer silicon layer to impede tissue ingrowth. Results: At 1-month postimplantation, the tissue chamber was found heavily vascularized, as assessed by laser Doppler perfusion analysis. Histological examination showed that the AV loop was integrated into the collagen matrix of the template and that the whole template was filled with a newly formed soft connective tissue. Most interestingly, the whole scaffold was found heavily vascularized, including the formation of a large number of a-SMA-positive arterioles. Conclusions: The developed microsurgical chamber provides a highly vascular, isolated tool for in vivo tissue engineering. V

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