2~10 48 0.3~3,000 μg/ml Cytotoxicity and inflammation [15] U973 20 12~24 0.625~20 μg/ml MLN4924 Transcriptional change of TIMP-1 [16] BGC-823 20 24~72 100~800 mg/L Cytotoxicity and inhibited growth [17] NIH3 T3/HFW 15 24~72 0.0005~50 μg/ml Cytotoxicity and ROS [18] WIL2-NS 8.2 6~48 26~130 μg/ml Cause genotoxicity and cytotoxicity [19] PC12 cells 21 6~48 1~100 μg/ml ROS and apoptosis [20] lymphocytes 25 1~48 20~100 μg/ml Induced genotoxicity [21] MC3T3-E1 5/32 24~72 5~500 μg/ml Cytotoxicity and pro-inflammatory [22] Hela cells 80 × 10 12 0.1~1.6 mg/ml Cytotoxicity and OS-mediated [23]

THP-1 cells 10 to 40 24 0.1~1.6 mg/ml Reactive oxygen [24] HDMEC 70 24~72 5~50 μg/ml No cytotoxicity and inflammatory [25] check details CHL 21 24/72 0.025~1.00 mg/ml Cytotoxicity [26] HLF 21/80 24/48 5~80 mg/L Inhibit GJIC [27] A549 5 to 10 6 25~200 μg/ml DNA damage [28] Red cells 15 3 1.25~20.0 g/L MDA generations and hemolytic [29] A549 25 1~24 100 μg/ml ROS and inhibit the growth [30] BGC-823 20 24 0.1~0.4 mg/ml Increased ROS levels [31] HaCaT 20 to 35 4 10~300 μg/ml Damaged structure and inhibited growth [32] A549

5 24~72 5~160 μg/ml Induced ROS [33] L929 20 to 100 24~72 50~200 μg/ml No cell proliferation and apoptosis [34] 293 T and CHO 10 24 10~500 μg/ml Induced cell apoptosis [35] HaCaT 4~60 24 10~200 mg/ml Cytotoxicity and apoptosis BEAS, Human bronchial epithelial cells; CHL, Classical Hodgkin lymphoma; HDMEC, Human dermal microvascular endothelial cells; GJIC, Gap junctional intercellular communication; HDL, human diploid fibroblast; HLF, Human lactoferrin; OS, Oxidative stress; NS, Nervous system; ROS, Reactive oxygen species. Table

2 Description of evidence for health effects of nano-TiO 2 from mice and rats models Reference Exposed Depsipeptide routes Diameter (nm) Dose Time Main results [36] Digestive tract 25~155 5 g/kg 2 weeks Transported to other tissues and organs [7] Respiratory tract 21 42 mg/m3 8 to 18 days Lung inflammation and neurobehavioral toxicity [37] Respiratory tract 10/100 500 μg/mouse 30 days Pathological lesions in the brain and neurotoxicity. [38] Intraperitoneal 5 5~150 mg/kg 14 days Liver toxicity, inflammation, and apoptosis [39] Respiratory tract 25 1.25 mg 7 days Lung toxicities and Selleck AZD6244 presence of aggregates or agglomerates [40] Skin 4/60 5% TiO2 60 days Retained in the stratum corneum and the basal cells [41] Intraperitoneal 5 5~150 mg/kg 14 days Liver DNA cleavage and hepatocyte apoptosis [42] Intraperitoneal 100 324~2592 mg/kg 7/14 days The toxicity of the liver, kidney, lung, and spleen [43] Intraperitoneal 5 5~150 mg/kg 14 days Caused serious damage to the liver and kidney [44] Respiratory tract <10 5~500 μg 24 h Induce lung inflammation [45] Respiratory tract 34.

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