title: Electrospun polyphosphazene nanofibers for in vitro rat endothelial cells proliferation.
abstract: A large variety of natural and synthetic polymers have been explored as scaffolds for the seeding and growth of different types of cells. To fabricate a scaffold that can be used as a synthetic extracellular matrix (ECM), it is important to replicate the nanoscale dimensions of natural ECM. The electrospinning process allows to produce ultrathin fibers so that this method represents a suitable approach to scaffold fabrication for tissue engineering applications. In this work, the feasibility of obtaining flat or tubular matrices from biocompatible poly[(ethyl phenylalanato)(1.4) (ethyl glycinato)(0.6) phosphazene] by electrospinning was evaluated and the effect of process parameters on the diameter of nanofibers was examined. The adhesion and growth of rat neuromicrovascular endothelial cells cultured on sheets and tubes composed by the polymer with an average fiber diameter of 850 +/- 150 nm were also reported. Microscopic examination of the seeded tubes demonstrated that, after 16 days of incubation, endothelial cells formed a monolayer on the whole surface. These results are the first step to demonstrate that tubes of biodegradable polyphosphazenes might be a feasible model to construct human tissues such as vessels or cardiac valves.
authors.affiliation: Institute of Organic Synthesis and Photoreactivity, ISOF, C.N.R., Viale dell'Università,2, 35020 Legnaro, Padova, Italy.
authors.forename: Paolo
authors.initials: P
authors.lastname: Carampin
authors.forename: Maria Teresa
authors.initials: MT
authors.lastname: Conconi
authors.forename: Silvano
authors.initials: S
authors.lastname: Lora
authors.forename: Anna Michela
authors.initials: AM
authors.lastname: Menti
authors.forename: Silvia
authors.initials: S
authors.lastname: Baiguera
authors.forename: Silvia
authors.initials: S
authors.lastname: Bellini
authors.forename: Claudio
authors.initials: C
authors.lastname: Grandi
authors.forename: Pier Paolo
authors.initials: PP
authors.lastname: Parnigotto
mesh_terms: D000818:Animals; D040761:Biomimetic Materials / Q000737:chemistry*; D002319:Cardiovascular System / Q000166:cytology; D002448:Cell Adhesion; D049109:Cell Proliferation; D042783:Endothelial Cells / Q000166:cytology; D004730:Endothelium, Vascular / Q000166:cytology*; D005109:Extracellular Matrix; D008297:Male; D049329:Nanostructures / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000627:therapeutic use*; D011108:Polymers / Q000627:therapeutic use*; D051381:Rats; D017207:Rats, Sprague-Dawley; D023822:Tissue Engineering / Q000379:methods*
chemical_list: D009943:Organophosphorus Compounds; D011108:Polymers; C108974:poly(phosphazene)