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Dexmedetomidine attenuates cisplatin-induced cognitive impairment by modulating miR-429-3p expression in rats

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Abstract

Chemotherapy-induced cognitive impairment (CICI) is widely recognized as a frequent adverse side effect following the administration of chemotherapeutic agents. This study aimed to explore the neuroprotective functions and mechanisms of microRNAs (miRNAs) mediated by dexmedetomidine (Dex) on cisplatin-induced CICI. The model rats received 5 mg/kg cisplatin injections once per week for 4 weeks. Dex (30 μg/kg) was administered before cisplatin treatment. The protective effects of Dex were evaluated using Morris water maze, Nissl staining, and transmission electron microscopy. Dex-mediated miRNAs were screened via miRNA sequencing. The effects of Dex and key miRNAs on mitochondrial DNA gene mt-ND1 and caspase-9 expression were tested. Dex exhibited a protective effect against decreased learning memory ability, hippocampal neuronal damage, and mitochondrial damage in CICI rats. Thirty-nine differentially expressed (DE) miRNAs were screened, 13 of which responded positively to Dex treatment. Gene Ontology annotation identified that DE miRNAs were mainly involved in transcription, DNA-templated. Kyoto Encyclopedia of Genes and Genomes pathway analysis showed that DE miRNAs were mainly involved in neuronal function and brain development-related pathways, such as axon guidance and calcium signaling pathways. Compared to cisplatin treatment, the expression of miR-429-3p responded more strongly to Dex treatment. In cisplatin-treated cultured hippocampal neurons, Dex treatment and miR-429-3p overexpression significantly increased mitochondrial DNA gene mt-ND1expression and decreased caspase-9 expression. Our study suggests that Dex alleviates CICI by modulating miR-429-3p expression in rats. Thus, Dex may be effective in preventing the side effects of cisplatin.

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Availability of data and materials

The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Funding

This study was provided by Science and technology project of education department of Jiangxi province (project no. GJJ190035).

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Authors and Affiliations

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Contributions

Conceptualization and Funding acquisition: GX. Data curation: CL and FD. Formal analysis: JN and BZ. Investigation: CL, JN and WD. Methodology: ZZ and BZ. Writing—original draft: CL, JN and WD. Writing—review and editing: BZ, FD and ZZ. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Guohai Xu.

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Conflict of interest

The authors declared that they have no conflict of interest.

Ethics approval and consent to participate

The animal experiments in this study and all procedures involving the handling and treatment of rat during this study were approved by the Institutional Animal Care and Use Committee of the Second Affiliated Hospital of Nanchang University. All the experiments were performed according to the guidelines of the National Institutes of Health Guide for the Care and Use of Laboratory Animals.

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13205_2020_2217_MOESM3_ESM.tif

Supplementary file3 (TIF 120 kb) Quality control results of a representative sample sequence. The horizontal axis indicates the number of bases or the range of bases, the vertical axis displays quality score values; quality scores > 30 revealed the accuracy of mapping to be greater than 99.9%

13205_2020_2217_MOESM4_ESM.tif

Supplementary file4 (TIF 697 kb) Wayne diagrams illustrating predicted DE miRNAs target genes between control and model groups (A), as well as DE miRNA target genes involving the Dex and model groups (B)

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Li, C., Niu, J., Zhou, B. et al. Dexmedetomidine attenuates cisplatin-induced cognitive impairment by modulating miR-429-3p expression in rats. 3 Biotech 10, 244 (2020). https://doi.org/10.1007/s13205-020-02217-1

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  • DOI: https://doi.org/10.1007/s13205-020-02217-1

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