Cytocompatibility of electrospun polyvinylidene fluoride piezoelectric bionic periosteum
- VernacularTitle:静电纺丝聚偏氟乙烯压电仿生骨膜的细胞相容性
- Author:
Suiyan WEI
1
;
Yijing CAO
;
Shuai ZHAO
;
Dongyao LI
;
Qin WEI
;
Yan XU
;
Guoqiang XU
Author Information
- Keywords: electrospinning; polyvinylidene fluoride; bone defect; biomimetic periosteum; cell compatibility; bone tissue engineering
- From: Chinese Journal of Tissue Engineering Research 2024;28(15):2351-2357
- CountryChina
- Language:Chinese
- Abstract: BACKGROUND:Polyvinylidene fluoride(PVDF)with piezoelectric properties,good biocompatibility and nontoxicity make it a suitable candidate for periosteal repair. OBJECTIVE:To evaluate the cytotoxicity of PVDF bionic periosteum by electrospinning with zinc and magnesium ions in vitro. METHODS:Pure PVDF,zinc-doped PVDF,magnesium-doped PVDF and Zinc-magnesium ion PVDF piezoelectric bionic periosteum were prepared by electrospinning technology,respectively.They were named PVDF,PVDF-Zn,PVDF-Mg and PVDF-Zn-Mg,in which the mass fraction of zinc and magnesium ions were all 1%.Osteoblasts and vascular endothelial cells were co-cultured with four groups of bionic periosteum.Cell compatibility of bionic periosteum was determined by alkaline phosphatase staining,CD31 immunofluorescence staining,and scanning electron microscopy. RESULTS AND CONCLUSION:(1)Osteoblasts:Alkaline phosphatase staining after 7 days of culture showed that the PVDF-Zn group secreted more alkaline phosphatase than the other three groups.Under a scanning electron microscopy,after 1 day of culture,the cells had a certain spread on the surface of PVDF-Mg and PVDF-Zn-Mg bionic periosteum,and the pseudopod extended to all sides.On day 3,the cell edge of each group extended pseudopods to the material.By days 5 and 7,the cells were fully spread,well grown and firmly covered the surface of the fibers,and the cellular pseudopods extended around and into the interstitial space of the fibers.CCK-8 assay showed that the cell proliferation on the bionic periosteum of each group showed an increasing trend over time and the relative proliferation rate of cells at 1,3,5,and 7 days was≥75%,and the cytotoxicity was≤grade 1.(2)Vascular endothelial cells:CD31 immunofluorescence staining for 3 days showed that the cells adhered and spread well on the bionic periosteum of each group and connected with each other,and the number of cells in the PVDF-Zn-Mg group was more than that in the other three groups.Under scanning electron microscope,the cells began to adhere to the surface of each group of fibers after 1 and 3 days of culture.On day 5,the cells were well spread on the surface of the fibers and extended obvious pseudopods.On day 7,the cells on the PVDF-Mg and PVDF-Zn-Mg bionic periosteum grew in multiple layers and extended the pseudopod into the fibrous void.CCK-8 assay showed that the cell proliferation on the bionic periosteum of each group showed a downward trend over time,and the relative proliferation rate of cells at 1,3,5 and 7 days was≥125%,and the cytotoxicity was grade 0.(3)The results showed that Zn-Mg electrospun PVDF piezoelectric bionic periosteum had good cytocompatibility.
