Acta Metallurgica Sinica (English Letters) ›› 2022, Vol. 35 ›› Issue (5): 812-824.DOI: 10.1007/s40195-021-01292-4

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Doping Gd3+ Ion in PDA-PHBV Coating on Ti6Al4V Alloy for Enhancing Corrosion Resistance and Proliferation of Human Gingival Fibroblasts and Human Umbilical Vein Endothelial Cells

Sijie Qin1,2, Xiongcheng Xu4, Yanjin Lu1,2,3(), Liu Li1,3, Tingting Huang1, Jinxin Lin1,2,3()   

  1. 1Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China
    2University of the Chinese Academy of Sciences, Beijing, 100049, China
    3College of Chemistry, Fuzhou University, Fuzhou, 350108, China
    4Research Center of Oral Tissue Engineering, School and Hospital of Stomatology, Fujian Medical University, Fuzhou, 350001, China
  • Received:2021-04-24 Revised:2021-05-18 Accepted:2021-06-08 Online:2022-05-10 Published:2021-07-30
  • Contact: Yanjin Lu,Jinxin Lin
  • About author:Jinxin Lin, franklin@fjirsm.ac.cn
    Yanjin Lu, yjlu@fjirsm.ac.cn;

Abstract:

In this study, we fabricated poly(3-hydroxybutyrate-3-hydroxyvalerate) (PHBV) coatings doped with Gd3+ (1, 5, and 10 × 10-4 mol/L) on Ti6Al4V alloy for the first time to promote soft tissue sealing around dental implants. The corrosion resistance of Gd3+-modified PHBV-coated Ti6Al4V was studied by electrochemical and immersion tests, respectively, whereas CCK-8 and RT-PCR evaluated the biocompatibility to human gingival fibroblasts (HGFs) and human umbilical vein endothelial cells (HUVECs). It was found that the Gd3+-modified PHBV coating could enhance the corrosion resistance of Ti6Al4V. In vitro cell tests showed that PHBV coatings with and without Gd3+ addition could promote adhesion and proliferation of HGFs and HUVECs, showing a Gd3+ content-dependent manner. Moreover, it was found that the PDA-PHBV@1Gd showed the best proliferation to HGFs by up-regulating gene expressions of VINCULIN, ITGB1, and ITGA3, whereas the best response to HUVECs with the highest gene expression of eNOS and HIF-1α genes was found in the PDA-PHBV@5Gd-coated group.

Key words: Soft tissue sealing, Poly(3-hydroxybutyrate-3-hydroxyvalerate) (PHBV), Gd3+, Corrosion resistance, Human gingival fibroblasts