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Meng CY, Ma XY, Xu MY, Pei SF, Liu Y, Hao ZL, Li QZ, Feng FM. Transcriptomics-based investigation of manganese dioxide nanoparticle toxicity in rats' choroid plexus. Sci Rep 2023; 13:8510. [PMID: 37231062 PMCID: PMC10213021 DOI: 10.1038/s41598-023-35341-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 05/16/2023] [Indexed: 05/27/2023] Open
Abstract
Manganese dioxide nanoparticles (MnO2-NPs) have a wide range of applications in biomedicine. Given this widespread usage, it is worth noting that MnO2-NPs are definitely toxic, especially to the brain. However, the damage caused by MnO2-NPs to the choroid plexus (CP) and to the brain after crossing CP epithelial cells has not been elucidated. Therefore, this study aims to investigate these effects and elucidate potential underlying mechanisms through transcriptomics analysis. To achieve this objective, eighteen SD rats were randomly divided into three groups: the control group (control), low-dose exposure group (low-dose) and high-dose exposure group (high-dose). Animals in the two treated groups were administered with two concentrations of MnO2-NPs (200 mg kg-1 BW and 400 mg kg-1 BW) using a noninvasive intratracheal injection method once a week for three months. Finally, the neural behavior of all the animals was tested using a hot plate tester, open-field test and Y-type electric maze. The morphological characteristics of the CP and hippocampus were observed by H&E stain, and the transcriptome of CP tissues was analysed by transcriptome sequencing. The representative differentially expressed genes were quantified by qRT-PCR. We found that treatment with MnO2-NPs could induce learning capacity and memory faculty decline and destroy the structure of hippocampal and CP cells in rats. High doses of MnO2-NPs had a more obvious destructive capacity. For transcriptomic analysis, we found that there were significant differences in the numbers and types of differential genes in CP between the low- and high-dose groups compared to the control. Through GO terms and KEGG analysis, high-dose MnO2-NPs significantly affected the expression of transporters, ion channel proteins, and ribosomal proteins. There were 17 common differentially expressed genes. Most of them were transporter and binding genes on the cell membrane, and some of them had kinase activity. Three genes, Brinp, Synpr and Crmp1, were selected for qRT-PCR to confirm their expression differences among the three groups. In conclusion, high-dose MnO2-NPs exposure induced abnormal neurobehaviour, impaired memory function, destroyed the structure of the CP and changed its transcriptome in rats. The most significant DEGs in the CP were within the transport system.
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Affiliation(s)
- Chun-Yan Meng
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, 063210, People's Republic of China
| | - Xin-Yi Ma
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, 063210, People's Republic of China
| | - Ming-Yan Xu
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, 063210, People's Republic of China
| | - Sheng-Fei Pei
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, 063210, People's Republic of China
| | - Yang Liu
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, 063210, People's Republic of China
| | - Zhuo-Lu Hao
- School of Public Health, Nanjing Medical University, Nanjing, 211166, People's Republic of China
| | - Qing-Zhao Li
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, 063210, People's Republic of China
| | - Fu-Min Feng
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei, 063210, People's Republic of China.
- College of Life Sciences, North China University of Science and Technology, Tangshan, Hebei, 063210, People's Republic of China.
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