title: Experimental study on the construction of small three-dimensional tissue engineered grafts of electrospun poly-ε-caprolactone.
abstract: Studies on three-dimensional tissue engineered graft (3DTEG) have attracted great interest among researchers as they present a means to meet the pressing clinical demand for tissue engineering scaffolds. To explore the feasibility of 3DTEG, high porosity poly-ε-caprolactone (PCL) was obtained via the co-electrospinning of polyethylene glycol and PCL, and used to construct small-diameter poly-ε-caprolactone-lysine (PCL-LYS-H) scaffolds, whereby heparin was anchored to the scaffold surface by lysine groups. A variety of small-diameter 3DTEG models were constructed with different PCL layers and the mechanical properties of the resulting constructs were evaluated in order to select the best model for 3DTEGs. Bone marrow mononuclear cells were induced and differentiated to endothelial cells (ECs) and smooth muscle cells (SMCs). A 3DTEG (labeled '10-4%') was successfully produced by the dynamic co-culture of ECs on the PCL-LYS-H scaffolds and SMCs on PCL. The fluorescently labeled cells on the 3DTEG were subsequently observed by laser confocal microscopy, which showed that the ECs and SMCs were embedded in the 3DTEG. Nitric oxide and endothelial nitric oxide synthase assays showed that the ECs behaved normally in the 3DTEG. This study consequently provides a new thread to produce small-diameter tissue engineered grafts, with excellent mechanical properties, that are perfusable to vasculature and functional cells.
authors: Department of Vascular Surgery, Xuanwu Hospital, Capital Medical University, No. 45 Changchun Street, Xicheng District, Beijing, 100053, China.
authors: Guang-Chang
authors: GC
authors: Zhu
authors: Yong-Quan
authors: YQ
authors: Gu
authors: Xue
authors: X
authors: Geng
authors: Zeng-Guo
authors: ZG
authors: Feng
authors: Shu-Wen
authors: SW
authors: Zhang
authors: Lin
authors: L
authors: Ye
authors: Zhong-Gao
authors: ZG
authors: Wang
mesh_terms: D000818:Animals; D001672:Biocompatible Materials / Q000138:chemical synthesis; D002454:Cell Differentiation / Q000502:physiology; D049109:Cell Proliferation / Q000502:physiology; D002470:Cell Survival / Q000502:physiology; D002478:Cells, Cultured; D019245:Compressive Strength; D004285:Dogs; D055119:Elastic Modulus; D004595:Electroplating / Q000379:methods; D042783:Endothelial Cells / Q000166:cytology* / Q000502:physiology; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005240:Feasibility Studies; D007963:Leukocytes, Mononuclear / Q000166:cytology* / Q000502:physiology; D008422:Materials Testing; D032389:Myocytes, Smooth Muscle / Q000166:cytology* / Q000502:physiology; D011091:Polyesters / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength; D023822:Tissue Engineering / Q000295:instrumentation*; D054457:Tissue Scaffolds
chemical_list: D001672:Biocompatible Materials; D011091:Polyesters; C016240:polycaprolactone