Development of Electrospun Composite Fibers in Multiscale Structure and Investigating the Performance on Proliferation and Osteogenic Differentiation of ADSCs |
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| Authors: | Liuyang Xuan Ming Shi Shuangshuang Ma Feng Ye Xuetao Shi Ling Yan Yan Li |
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| Affiliation: | 1. Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, Guangdong Provincial Engineering and Technology Center of Advanced and Portable Medical Devices, Biomedical Engineering, School of Engineering, Sun Yat‐sen University, Guangzhou, Guangdong, P. R. China;2. Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education of China, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, P. R. China;3. School of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong, P. R. China;4. Department of Plastic and Cosmetic Surgvery, The Third Affiliated Hospital, Sun Yat‐sen University, Guangzhou, Guangdong, P. R. China |
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| Abstract: | Electrospun composite membranes in multiscale structures are developed for bone tissue engineering. Aligned polycaprolactone (PCL) fibers entrapping CA‐HAp microparticles (containing CaCO3, hydroxyapatite, and casein in a hierarchical organization) are electrospun to find whether synergistic effects of fiber alignment and CA‐HAp microparticles on improving osteogenic differentiation can be obtained. CA‐HAp microparticles are in a spherical morphology of 1.42 ± 0.26 µm. Their presence increases fiber diameter and does not significantly affect fiber alignment. On all membranes, adipose derived stem cells (ADSCs) from humans spread very well. On a random group, cells distribute randomly and the presence of CA‐HAp microparticles facilitates cell proliferation, especially for the one at CA‐HAp/PCL 50 wt%; the one at CA‐HAp/PCL 20 wt% shows significantly much higher alkaline phosphatase (ALP) activity (112.0% higher) than the pure PCL membrane. On aligned samples, cells align along fibers and expression of ALP is enhanced. However, at the same composition (CA‐HAp/PCL 20 wt%), the random sample has much higher ALP activity than the aligned sample. The expressions of osteogenic marker genes are also evaluated. Combining the results and the applicability of membranes together, the random membrane at CA‐HAp/PCL 20 wt% is the best candidate for bone tissue engineering. |
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| Keywords: | adipose‐derived stem cells composite membranes fiber alignment osteogenic differentiation synergistic effects |
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