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Stress conditions induced circRNAs profile of extracellular vesicles in brain microvascular endothelial cells

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Abstract

Cerebral ischemia causes hypoxic injury and inflammation, and brain microvascular endothelial cells (BMVECs) dysfunction is an initial stage of blood-brain barrier disruption. Endothelial cells secrete extracellular vesicles (EVs) that are involved in intercellular signal transduction. EVs contain a variety of RNAs, proteins, and metabolites. Circular RNA (circRNA) is a member of the non-coding RNA. The expression profile and potential function of circRNAs in BMVECs are unknown. Here, human BMVECs have undergone hypoxia or TNF-α induction, and the changes in circRNAs were measured by RNA sequencing. A total of 70 circRNAs showed differential expression, including 43 previously unrecorded circRNAs and 27 recorded circRNAs. Since astrocyte end-feet encircle endothelial cells, they are considered the main targets of the EVs from BMVEC. The miRNA sequence data and bioinformatics were used to predict the circRNA-miRNA-mRNA networks in astrocytes. The gene ontology (GO) analysis showed the main downstream targets of circRNAs are DNA transcription regulation and protein kinase-related signaling pathways. These results suggest that altering circRNAs may be a potential therapeutic target for cerebral ischemia induced hypoxic injury and inflammation.

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The datasets used or analyzed during the current study are available from the corresponding author.

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Funding

This work was supported by the National Natural Science Foundation of China, No. 81960219 (to XLM); No. 82001269 (to FFS); and Science & Technology Department of Sichuan Province, No. 2021YJ0174 (to QL). The funding bodies played no role in the study design, in the collection, analysis and interpretation of data, in the writing of the paper, and in the decision to submit the paper for publication.

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XLM and FFS designed the research study. XLM, HZ, QL and JY performed the research. XLM and XH analyzed the data. XLM and FFS wrote the manuscript. All authors read and approved the final manuscript.

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Correspondence to Fei-Fei Shang.

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The authors have declared that no competing interest exists.

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Min, XL., Zou, H., Yan, J. et al. Stress conditions induced circRNAs profile of extracellular vesicles in brain microvascular endothelial cells. Metab Brain Dis 37, 1977–1987 (2022). https://doi.org/10.1007/s11011-022-01025-1

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  • DOI: https://doi.org/10.1007/s11011-022-01025-1

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