1. Botelho MC, Costa C, Silva S, Costa S, Dhawan A, Oliveira PA, et al. Effects of titanium dioxide nanoparticles in human gastric epithelial cells in vitro. J Biomed Biotechnol. 2014;68(1):59-64. Doi: 10.1016/j.biopha.2013.08.006.
2. Chen Z, Wang Y, Ba T, Li Y, Pu J, Chen T, et al. Genotoxic evaluation of titanium dioxide nanoparticles in vivo and in vitro. Toxicol Lett. 2014;226(3):314-9. Doi: 10.1016/j.toxlet.2014.02.020.
3. Trouiller B, Reliene R, Westbrook A, Solaimani P, Schiestl RH. Titanium dioxide nanoparticles induce DNA damage and genetic instability in vivo in mice. Cancer Res. 2009;69(22):8784-9. Doi: 10.1158/0008-5472.CAN-09-2496.
4. Chen J, Dong X, Zhao J, Tang G. In vivo acute toxicity of titanium dioxide nanoparticles to mice after intraperitioneal injection . J Appl Toxicol. 2009;29(4):330-7. Doi: 10.1002/jat.1414.
5. Weir A, Westerhoff P, Fabricius L, Hristovski K, Von Goetz N. Titanium dioxide nanoparticles in food and personal care products. Environ Sci Technol. 2012;46(4):2242-50. Doi.org/10.1021/es204168d
6. Barlow S, Chesson A, Collins JD, Flynn A, Hardy A, Jany K-D, et al. The potential risks arising from nanoscience and nanotechnologies on food and feed safety. EFSA J. 2009;7(3).
7. Wang J, Zhou G, Chen C, Yu H, Wang T, Ma Y, et al. Acute toxicity and biodistribution of different sized titanium dioxide particles in mice after oral administration. Toxicol Lett. 2007;168(2):176-85. Doi: 10.1016/j.toxlet.2006.12.001.
8. Xie G, Wang C, Sun J, Zhong G. Tissue distribution and excretion of intravenously administered titanium dioxide nanoparticles. Toxicol Lett. 2011;205(1):55-61. Doi: 10.1016/j.toxlet.2011.04.034.
9. Cho W-S, Kang B-C, Lee JK, Jeong J, Che J-H, Seok SH. Comparative absorption, distribution, and excretion of titanium dioxide and zinc oxide nanoparticles after repeated oral administration. Part Fibre Toxicol. 2013;10(1):1-9. Doi: 10.1186/1743-8977-10-9.
10. Geraets L, Oomen AG, Krystek P, Jacobsen NR, Wallin H, Laurentie M, et al. Tissue distribution and elimination after oral and intravenous administration of different titanium dioxide nanoparticles in rats. Part Fibre Toxicol. 2014;11(1):1-21. Doi: 10.1186/1743-8977-11-30.
11. Jones K, Morton J, Smith I, Jurkschat K, Harding A-H, Evans G. Human in vivo and in vitro studies on gastrointestinal absorption of titanium dioxide nanoparticles. Toxicol Lett. 2015;233(2):95-101. Doi: 10.1016/j.toxlet.2014.12.005.
12. Chen J, Dong X, Zhao J, Tang G. In vivo acute toxicity of titanium dioxide nanoparticles to mice after intraperitioneal injection. J Appl Toxicol. 2009;29(4):330-7. Doi: 10.1002/jat.1414.
13. Fabian E, Landsiedel R, Ma-Hock L, Wiench K, Wohlleben W, Van Ravenzwaay B. Tissue distribution and toxicity of intravenously administered titanium dioxide nanoparticles in rats. Arch Toxicol. 2008;82(3):151-7. Doi: 10.1007/s00204-007-0253-y.
14. Bergin IL, Witzmann FA. Nanoparticle toxicity by the gastrointestinal route: evidence and knowledge gaps. IJBNN. 2013;3(1-2). Doi: 10.1504/IJBNN.2013.054515.
15. Azim SAA, Darwish HA, Rizk MZ, Ali SA, Kadry MO. Amelioration of titanium dioxide nanoparticles-induced liver injury in mice: possible role of some antioxidants. Exp Toxicol Pathol. 2015;67(4):305-14. Doi: 10.1016/j.etp.2015.02.001.
16. Cui Y, Liu H, Zhou M, Duan Y, Li N, Gong X, et al. Signaling pathway of inflammatory responses in the mouse liver caused by TiO2 nanoparticles. J Biomed Mater Res A. 2011;96(1):221-9. Doi: 10.1002/jbm.a.32976.
17. Shukla RK, Kumar A, Vallabani NVS, Pandey AK, Dhawan A. Titanium dioxide nanoparticle-induced oxidative stress triggers DNA damage and hepatic injury in mice. Nanomedicine. 2014;9(9):1423-34. Doi: 10.2217/nnm.13.100.
18. Talamini L, Gimondi S, Violatto MB, Fiordaliso F, Pedica F, Tran NL, et al. Repeated administration of the food additive E171 to mice results in accumulation in intestine and liver and promotes an inflammatory status. Nanotoxicology. 2019;13(8):1087-101. Doi: 10.1080/17435390.2019.1640910.
19. Valentini X, Deneufbourg P, Paci P, Rugira P, Laurent S, Frau A, et al. Morphological alterations induced by the exposure to TiO2 nanoparticles in primary cortical neuron cultures and in the brain of rats. Toxicol Rep. 2018;5:878-89. Doi: 10.1016/j.toxrep.2018.08.006.
20. Wang Y, Chen Z, Ba T, Pu J, Chen T, Song Y, et al. Susceptibility of young and adult rats to the oral toxicity of titanium dioxide nanoparticles. Small. 2013;9(9‐10):1742-52. Doi: 10.1002/smll.201201185.
21. Bettini S, Boutet-Robinet E, Cartier C, Coméra C, Gaultier E, Dupuy J, et al. Food-grade TiO2 impairs intestinal and systemic immune homeostasis, initiates preneoplastic lesions and promotes aberrant crypt development in the rat colon. Sci Rep. 2017;7(1):40373. Doi:10.1038/srep40373.
22. Proquin H, Jetten MJ, Jonkhout MC, Garduno-Balderas LG, Briede JJ, de Kok TM, et al. Gene expression profiling in colon of mice exposed to food additive titanium dioxide (E171). Food Chem Toxicol. 2018;111:153-65. Doi: 10.1016/j.fct.2017.11.011.
23. Urrutia-Ortega IM, Garduño-Balderas LG, Delgado-Buenrostro NL, Freyre-Fonseca V, Flores-Flores JO, González-Robles A, Pedraza-Chaverri J, Hernández-Pando R, Rodríguez-Sosa M, León-Cabrera S, Terrazas LI, van Loveren H, Chirino YI. Food-grade titanium dioxide exposure exacerbates tumor formation in colitis associated cancer model. Food Chem Toxicol. 2016 Jul;93:20-31. Doi: 10.1016/j.fct.2016.04.014.
24. Blevins LK, Crawford RB, Bach A, Rizzo MD, Zhou J, Henriquez JE, et al. Evaluation of immunologic and intestinal effects in rats administered an E 171-containing diet, a food grade titanium dioxide (TiO2). Food Chem Toxicol. 2019;133:110793. Doi: 10.1016/j.fct.2019.110793.
25. Warheit D, Brown S, Donner E. Acute and subchronic oral toxicity studies in rats with nanoscale and pigment grade titanium dioxide particles. Food Chem Toxicol. 2015;84:208-24.Doi: 10.1016/j.fct.2015.08.026 .
26. Bachler G, von Goetz N, Hungerbuhler K. Using physiologically based pharmacokinetic (PBPK) modeling for dietary risk assessment of titanium dioxide (TiO2) nanoparticles. Nanotoxicology. 2015;9(3):373-80. Doi: 10.3109/17435390.2014.940404.
27. Rompelberg C, Heringa MB, van Donkersgoed G, Drijvers J, Roos A, Westenbrink S, et al. Oral intake of added titanium dioxide and its nanofraction from food products, food supplements and toothpaste by the Dutch population. Nanotoxicology. 2016;10(10):1404-14. Doi: 10.1080/17435390.2016.1222457.
28. Heringa MB, Geraets L, van Eijkeren JC, Vandebriel RJ, de Jong WH, Oomen AG. Risk assessment of titanium dioxide nanoparticles via oral exposure, including toxicokinetic considerations. Nanotoxicology. 2016;10(10):1515-25. Doi: 10.1080/17435390.2016.1238113.
29. Peters RJ, Oomen AG, van Bemmel G, van Vliet L, Undas AK, Munniks S, et al. Silicon dioxide and titanium dioxide particles found in human tissues. Nanotoxicology. 2020;14(3):420-32.Doi: 10.1080/17435390.2020.1718232.
30. Dhawan A, Sharma V. Toxicity assessment of nanomaterials: methods and challenges. Anal Bioanal Chem. 2010;398(2):589-605. Doi: 10.1007/s00216-010-3996-x.
31. Hillyer JF, Albrecht RM. Gastrointestinal persorption and tissue distribution of differently sized colloidal gold nanoparticles. J Pharm Sci. 2001;90(12):1927-36. Doi: 10.1002/jps.1143.
32. Sharma V, Singh P, Pandey AK, Dhawan A. Induction of oxidative stress, DNA damage and apoptosis in mouse liver after sub-acute oral exposure to zinc oxide nanoparticles. Mutat Res Genet Toxicol Environ Mutagen. 2012;745(1-2):84-91. Doi: 10.1016/j.mrgentox.2011.12.009.
33. Sanaa A, Maha Z, Samy A, Hebatallah A, Mai O. Roll of potent antioxidants in regulation of SMAD-2 transcription and TGF-B1 signaling in nano sized titanium dioxide-induced oxidative injury in mice liver. Inter. J Pharma. 2015;5:17-26.
34. Xiong D, Fang T, Yu L, Sima X, Zhu W. Effects of nano-scale TiO2, ZnO and their bulk counterparts on zebrafish: acute toxicity, oxidative stress and oxidative damage. Sci Total Environ. 2011;409(8):1444-52. Doi: 10.1016/j.scitotenv.2011.01.015.
35. Olmedo DG, Tasat D, Guglielmotti MB, Cabrini RL. Titanium transport through the blood stream. An experimental study on rats. J Mater Sci Mater Med. 2003;14(12):1099-103. Doi: 10.1023/b:jmsm.0000004007.26938.67.