期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 424, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.127562
关键词
TCS; social dominance; memory formation; hippocampus; synaptic plasticity; gut microbiota
资金
- National Natural Science Foundation of China [82171536, 81771462, 81800742]
- Natural Science Foundation of Hebei Province [H2018206119, A201802022]
- CAMS Innovation Fund for Medical Sciences [2019-I2M-5-055]
- Science and Technology Research Foundation for Colleges and Universities of Hebei Province [QN2017102]
- Special Foundation for Excellent Undergraduate Students from Hebei Medical University [USIP2020008, USIP2020060, USIP2020097]
The study revealed that chronic exposure to TCS can reduce social dominance in mice, decrease social interaction, impair memory formation, alter the relative abundance of gut microbiota, and induce ultrastructural damage to hippocampal neurons and synapses. These findings suggest that TCS exposure may impact social behaviors through changes in gut microbiota and impaired plasticity of hippocampal neurons and synapses.
Triclosan (TCS), a newly identified environmental endocrine disruptor (EED) in household products, has been reported to have toxic effects on animals and humans. The effects of TCS exposure on individual social behaviors and the potential underlying mechanisms are still unknown. This study investigated the behavioral effects of 42day exposure to TCS (0, 50, 100 mg/kg) in drinking water using the open field test (OFT), social dominance test (SDT), social interaction test (SIT), and novel object recognition task (NOR). Using 16S rRNA sequencing analysis and transmission electron microscopy (TEM), we observed the effects of TCS exposure on the gut microbiota and ultrastructure of hippocampal neurons and synapses. Behavioral results showed that chronic TCS exposure reduced the social dominance of male and female mice. TCS exposure also reduced social interaction in male mice and impaired memory formation in female mice. Analysis of the gut microbiota showed that TCS exposure increased the relative abundance of the Proteobacteria and Actinobacteria phyla in female mice. Ultrastructural analysis revealed that TCS exposure induced ultrastructural damage to hippocampal neurons and synapses. These findings suggest that TCS exposure may affect social behaviors, which may be caused by altered gut microbiota and impaired plasticity of hippocampal neurons and synapses.
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