Coaxial electrospinning of PEEU/gelatin to fiber meshes with enhanced mesenchymal stem cell attachment and proliferation

Autor:	Jie Zou, Andreas Lendlein, Oliver E. C. Gould, Weiwei Wang, Karl Kratz, Xianlei Sun, Wing Tai Tung, Nan Ma
Rok vydání:	2020
Předmět:	Thermoplastic Materials science food.ingredient business.product_category Polymers Physiology Polyesters 030204 cardiovascular system & hematology Gelatin 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine food Physiology (medical) Microfiber Humans Fiber Elastic modulus Cell Proliferation chemistry.chemical_classification Tissue Engineering Tissue Scaffolds Mesenchymal Stem Cells Hematology Polymer Electrospinning chemistry Chemical engineering Surface modification Cardiology and Cardiovascular Medicine business
Zdroj:	Clinical Hemorheology and Microcirculation. 74:53-66
ISSN:	1875-8622 1386-0291
DOI:	10.3233/ch-199235
Popis:	Microfibers with a core-shell structure can be produced by co-axial electrospinning, allowing for the functionalization of the outer layer with bioactive molecules. In this study, a thermoplastic, degradable polyesteretherurethane (PEEU), consisting of poly(p-dioxanone) (PPDO) and poly(ɛ-caprolactone) (PCL) segments with different PPDO to PCL weight ratios, were processed into fiber meshes by co-axial electrospinning with gelatin. The prepared PEEU fibers have a diameter of 1.3±0.5 μm and an elastic modulus of around 5.1±1.0 MPa as measured by tensile testing in a dry state at 37°C, while the PEEU/Gelatin core-shell fibers with a gelatin content of 12±6 wt% and a diameter of 1.5±0.5 μm possess an elastic modulus of 15.0±1.1 MPa in a dry state at 37 °C but as low as 0.7±0.7 MPa when hydrated at 37 °C. Co-axial electrospinning allowed for the homogeneous distribution of the gelatin shell along the whole microfiber. Gelatin with conjugated Fluorescein (FITC) remained stable on the PEEU fibers after 7 days incubation in Phosphate-buffered saline (PBS) at 37 °C. The gelatin coating on PEEU fibers lead to enhanced human adipose tissue derived mesenchymal stem cell (hADSC) attachment and a proliferation rate 81.7±34.1 % higher in cell number in PEEU50/Gelatin fibers after 7 days of cell culture when compared to PEEU fibers without coating. In this work, we demonstrate that water-soluble gelatin can be incorporated as the outer shell of a polymer fiber via molecular entanglement, with a sustained presence and role in enhancing stem cell attachment and proliferation.
Databáze:	OpenAIRE
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