Genetic effects of chemically and biosynthesized titanium dioxide nanoparticles and of female rats and their fetuses.

With the increase in nanoparticles (NPs) products on the market, the possibility of animal and human exposure to these materials will increase. The smaller size of NPs facilitates their entrance through placental barriers and allows them to accumulate in embryonic tissue, where they can then be a source of different developmental malformations. Several toxicity studies with chemically synthesized titanium dioxide NPs (CTiO NPs) have been recently carried out; although there is insufficient data on exposure to biosynthesized titanium dioxide NPs (BTiO NPs) during pregnancy, the study aimed to evaluate the ability of an eco-friendly biosynthesis technique using garlic extract against maternal and fetal genotoxicities, which could result from repeated exposure to TiO NPs during gestation days (GD) 6-19. A total of fifty pregnant rats were divided into five groups (n = 10) and gavaged CTiO NPs and BTiO NPs at 100 and 300 mg/kg/day concentrations. Pregnant rats on GD 20 were anesthetized, uterine horns were removed, and then embryotoxicity was performed. The kidneys of the mothers and fetuses in each group were collected and then maintained in a frozen condition. Our results showed that garlic extract can be used as a reducing agent for the formation of TiO NPs. Moreover, BTiO NPs showed less toxic potential than CTiO NPs in HepG cells. Both chemically and biosynthesized TiO NP-induced genetic variation in the sequences of mother groups compared to the control group. In conclusion, the genetic effects of the sequence induced by chemically synthesized TiO NPs were greater than those of biosynthesized TiO NPs. However, there were no differences between the control group and the embryo-treated groups with chemically and biologically synthesized TiO NPs.