Journal of Zhejiang University-SCIENCE B

, Volume 19, Issue 2, pp 159–167 | Cite as

Toxicity testing of four silver nanoparticle-coated dental castings in 3-D LO2 cell cultures

  • Yi-ying Zhao
  • Qiang ChuEmail author
  • Xu-er Shi
  • Xiao-dong Zheng
  • Xiao-ting Shen
  • Yan-zhen ZhangEmail author


To address the controversial issue of the toxicity of dental alloys and silver nanoparticles in medical applications, an in vivo-like LO2 3-D model was constructed within polyvinylidene fluoride hollow fiber materials to mimic the microenvironment of liver tissue. The use of microscopy methods and the measurement of liver-specific functions optimized the model for best cell performances and also proved the superiority of the 3-D LO2 model when compared with the traditional monolayer model. Toxicity tests were conducted using the newly constructed model, finding that four dental castings coated with silver nanoparticles were toxic to human hepatocytes after cell viability assays. In general, the toxicity of both the castings and the coated silver nanoparticles aggravated as time increased, yet the nanoparticles attenuated the general toxicity by preventing metal ion release, especially at high concentrations.


LO2 cell 3-D model Silver nanoparticles Dental alloys Toxicity test 

LO2 细胞3-D 模型用于四种纳米银包裹的牙科合金材料毒性的检测





借助中空纤维管和胶原蛋白首次构建了LO2 细胞三维聚集体,并将该模型应用到医用材料毒性的评价中。


首先,采用扫描电镜观察中空纤维材料的孔径, 确保营养物质的正常交换。然后,将混合有胶原 蛋白的细胞悬液注入到中空纤维管的内胆,通过 尿素氮和白蛋白检测,确定最佳细胞密度进行长 期培养。在显微镜下观察细胞聚集体的形态,确 保模型的成功建立。其次,应用水热法制作纳米 银颗粒并将颗粒包裹到预先购买的合金材料上。 最后,用不同牙科材料的浸提液培养细胞1、3 和5 天,通过MTT 检测细胞死亡率,从而间接 评价材料的毒性。


中空纤维材料的表征结果显示该材料具有较好的耐热性和细胞粘附性,孔径大小适宜营养物质交 换,可以应用到三维模型的构建中。通过白蛋白 和尿素氮两个指标来评价三维模型的活性,发现 每毫升5×104 细胞的浓度最适宜细胞生长(图4)。 进一步模型评价表明,相比于传统单层培养的细胞,三维模型中的细胞能保持长期活力(图6) 且可以在更短时间内对低药物浓度作出反应。


LO2细胞 三维模型 纳米银 牙科合金 毒性检测 


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  1. Al-Hiyasat AS, Bashabsheh OM, Darmani H, 2002. Elements released from dental casting alloys and their cytotoxic effects. Int J Prosthodont, 155:473–478.Google Scholar
  2. Aksakal B, Yildirim OS, Gul H, 2004. Metallurgical failure analysis of various implant materials used in orthopedic applications. J Fail Anal Prev, 43:17–23. Scholar
  3. Allaker RP, 2010. The use of nanoparticles to control oral biofilm formation. J Dent Res, 8911:1175–1186. Scholar
  4. AshaRani PV, Mun GLK, Hande MP, et al., 2009. Cytotoxicity and genotoxicity of silver nanoparticles in human cells. ACS Nano, 32:279–290. Scholar
  5. Burcham PC, 2014. Target-organ toxicity: liver and kidney. In: An Introduction to Toxicology. Springer London, p.151–187. Scholar
  6. Chu Q, Zhao Y, Shi X, et al., 2017. in vivo-like 3-D model for sodium nitrite-and acrylamide-induced hepatotoxicity tests utilizing HepG2 cells entrapped in micro-hollow fibers. Sci Rep, 71:14837. Scholar
  7. Dambach DM, Andrews BA, Moulin F, 2005. New technologies and screening strategies for hepatotoxicity: use of in vitro models. Toxicol Pathol, 331:17–26. Scholar
  8. de Bartolo L, Salerno S, Morelli S, et al., 2006. Long-term maintenance of human hepatocytes in oxygen-permeable membrane bioreactor. Biomaterials, 2727:4794–4803. Scholar
  9. Fadeel B, Garcia-Bennett AE, 2010. Better safe than sorry: understanding the toxicological properties of inorganic nanoparticles manufactured for biomedical applications. Adv Drug Deliv Rev, 623:362–374. Scholar
  10. García-Contreras R, Argueta-Figueroa L, Mejía-Rubalcava C, et al., 2011. Perspectives for the use of silver nanoparticles in dental practice. Int Dent J, 616:297–301. Scholar
  11. Gómez-Lechón MJ, Castell JV, Donato MT, 2007. Hepatocytes— the choice to investigate drug metabolism and toxicity in man: in vitro variability as a reflection of in vivo. Chem Biol Interact, 1681:30–50. Scholar
  12. Hamouda IM, 2012. Current perspectives of nanoparticles in medical and dental biomaterials. J Biomed Res, 263: 143–151.Google Scholar
  13. Hanawa T, 2002. Evaluation techniques of metallic biomaterials in vitro. Sci Technol Adv Mater, 34:289–295. Scholar
  14. Hiromoto S, Noda K, Hanawa T, 2002. Development of electrolytic cell with cell-culture for metallic biomaterials. Corros Sci, 445:955–965. Scholar
  15. Hussain SM, Hess KL, Gearhart JM, et al., 2005. In vitro toxicity of nanoparticles in BRL 3A rat liver cells. Toxicol in Vitro, 197:975–983. Scholar
  16. Kino Y, Sawa M, Kasai S, et al., 1998. Multiporous cellulose microcarrier for the development of a hybrid artificial liver using isolated hepatocytes. J Surg Res, 791:71–76. Scholar
  17. Kittler S, Greulich C, Diendorf J, et al., 2010. Toxicity of silver nanoparticles increases during storage because of slow dissolution under release of silver ions. Chem Mater, 2216:4548–4554. Scholar
  18. Kmiec Z, 2001. Cooperation of liver cells in the synthesis and degradation of eicosanoids. In: Cooperation of Liver Cells in Health and Disease. Springer Berlin Heidelberg, p.51–59.Google Scholar
  19. Li Y, Lv XL, 2001. Research progress of modification of poly (vinylidene fluoride) porous membrane. J Tianjin Polytech Univ, 5:74–78.Google Scholar
  20. Manivasagam G, Dhinasekaran D, Rajamanickam A, 2010. Biomedical implants: corrosion and its prevention— a review. Recent Pat Corros Sci, 21:40–54. Scholar
  21. Mizumoto H, Ishihara K, Nakazawa K, et al., 2008. A new culture technique for hepatocyte organoid formation and long-term maintenance of liver-specific functions. Tissue Eng Part C Methods, 142:167–175. Scholar
  22. Morones JR, Elechiguerra JL, Camacho A, et al., 2005. The bactericidal effect of silver nanoparticles. Nanotechnology, 1610:2346–2353. Scholar
  23. Niinomi M, Hattori T, Morikawa K, et al., 2002. Development of low rigidity β-type titanium alloy for biomedical applications. Mater Trans, 4312:2970–2977. Scholar
  24. Ren YB, Yang C, Liang Y, 2002. Research and development of new biomedical metallic material. Mater Rev, 162: 12–15.Google Scholar
  25. Schmalz G, Langer H, Schweikl H, 1998. Cytotoxicity of dental alloy extracts and corresponding metal salt solutions. J Dent Res, 7710:1772–1778. Scholar
  26. Silva T, Pokhrel LR, Dubey B, et al., 2014. Particle size, surface charge and concentration dependent ecotoxicity of three organo-coated silver nanoparticles: comparison between general linear model-predicted and observed toxicity. Sci Total Environ, 468-469:968–976. Scholar
  27. Sung JH, Ji JH, Yoon JU, et al., 2008. Lung function changes in Sprague-Dawley rats after prolonged inhalation exposure to silver nanoparticles. Inhal Toxicol, 206:567–574. Scholar
  28. Wataha JC, 2000. Biocompatibility of dental casting alloys: a review. J Prosth Dent, 832:223–234. Scholar
  29. Wong KKY, Cheung SOF, Huang L, et al., 2009. Further evidence of the anti-inflammatory effects of silver nanoparticles. Chem Med Chem, 47:1129–1135. Scholar
  30. Yamamoto A, Honma R, Sumita M, 1998. Cytotoxicity evaluation of 43 metal salts using murine fibroblasts and osteoblastic cells. J Biomed Mater Res, 392:331–340.<331::AID-JBM22<3.0.CO;2-EGoogle Scholar
  31. Zreiqat H, Howlett CR, Zannettino A, et al., 2002. Mechanisms of magnesium-stimulated adhesion of osteoblastic cells to commonly used orthopaedic implants. J Biomed Mater Res, 622:175–184. Scholar

Copyright information

© Zhejiang University and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food ProcessingFuli Institute of Food ScienceHangzhouChina
  2. 2.Huajiachi Dental CenterStomatology Hospital Affiliated to Zhejiang University of MedicineHangzhouChina
  3. 3.Department of General Dentistry, the Second Affiliated Hospital, School of MedicineZhejiang UniversityHangzhouChina

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