华西口腔医学杂志

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纳米羟磷灰石/聚酰胺66对牙髓细胞生物学作用的实验研究

苏勤,叶玲,周学东   

  1. 口腔生物医学工程教育部重点实验室,四川大学,四川 成都610041
  • 收稿日期:2005-02-25 修回日期:2005-02-25 出版日期:2005-02-20 发布日期:2005-02-20
  • 通讯作者: 周学东,Tel: 028-85501439
  • 作者简介:苏 勤(1971-),女,重庆人,副教授,博士
  • 基金资助:
    四川省科委重点资助项目(02SG022-001)

Biological Effects of Nano-hydroxyapatite/Polyamide 66 on the Dental Pulp Cells

SU Qin,YE Ling,ZHOUXue-dong   

  1. Key.Laboratory ofOral Biomedical Engineering ofMinistry ofEducation,Sichuan University,Chengdu610041,China
  • Received:2005-02-25 Revised:2005-02-25 Online:2005-02-20 Published:2005-02-20

摘要: 目的 探讨新型纳米羟磷灰石/聚酰胺66复合生物材料(nHA-PA66)对牙髓细胞的生物学作用。方法 采 用细胞培养技术、倒置显微镜观察、四唑盐比色法(MTT)、流式细胞术、碱性磷酸酶活性检测和实时定量RT-PCR (QRT-PCR)等实验技术及方法,从细胞分子水平研究nHA-PA66对体外培养的人牙髓细胞生长及功能的影响。结果  牙髓细胞在nHA-PA66浸提液作用下,细胞外形无明显改变;nHA-PA66对牙髓细胞增殖、细胞周期、碱性磷酸酶 活性及牙本质涎磷蛋白(DSPP)mRNA的表达无明显促进或抑制作用。结论 nHA-PA66作为一种新型纳米生物材 料,对牙髓细胞的生长和功能无不良影响,有较好的生物相容性,但未见到明显的细胞生物活性作用。

关键词: 纳米羟磷灰石/聚酰胺66, 生物相容性, 生物活性

Abstract:

Objective To investigate the biological effects of the new nano-hydroxyapatite/polyamide 66 biological composites (nHA-PA66) on the dental pulp cells.Methods After interaction with the nHA-PA66 eluate, the growth, proliferation, and function of theinvitrocultured human dental pulp cellswere studied by cell culture technique, inverted phase-contrastmicroscope observation, MTT assay, flow cytometry, ALP activity assay and quantitative reverse transcriptase-polymerase chain reaction (QRT-PCR) analysis.Results The cultured pulp cells grewwell and showed nomorphological variation. Moreover, thismaterial had no negative effects on the proliferation, cell cycle, ALP activity and the expression of dentin sialophosphoprotein (DSPP) mR- NA of the pulp cells.Conclusion As a newnano-biomaterial, nHA-PA66 has good biocompatibilitytothe pulp cells, but no ob- vious bioactivity.

Key words: nano-hydroxyapatite/polyamide 66, biocompatibility, bioactivity