Long non-coding RNA and mRNA analysis of Ang II-induced neuronal dysfunction

The sustained activation of Angiotensin II (Ang II) induces the remodelling of neurovascular units, inflammation and oxidative stress reactions in the brain. Long non-coding RNAs (lncRNAs) play a crucial regulatory role in the pathogenesis of hypertensive neuronal damage. The present study aimed to substantially extend the list of potential candidate genes involved in Ang II-related neuronal damage. This study assessed apoptosis and energy metabolism with Annexin V/PI staining and a Seahorse assay after Ang II exposure in SH-SY5Y cells. The expression of mRNA and lncRNA was investigated by transcriptome sequencing. The integrated analysis of mRNA and lncRNAs and the molecular mechanism of Ang II on neuronal injury was analysed by bioinformatics. Ang II increased the apoptosis rate and reduced the energy metabolism of SH-SY5Y cells. The data showed that 702 mRNAs and 821 lncRNAs were differentially expressed in response to Ang II exposure (244 mRNAs and 432 lncRNAs were upregulated, 458 mRNAs and 389 lncRNAs were downregulated) (fold change ≥ 1.5, P < 0.05). GO and KEGG analyses showed that both DE mRNA and DE lncRNA were enriched in the metabolism, differentiation, apoptosis and repair of nerve cells. This is the first report of the lncRNA-mRNA integrated profile of SH-SY5Y cells induced by Ang II. The novel targets revealed that the metabolism of the vitamin B group, the synthesis of unsaturated fatty acids and glycosphingolipids are involved in the Ang II-related cognitive impairment. Sphingolipid metabolism, the Hedgehog signalling pathway and vasopressin-regulated water reabsorption play important roles in nerve damage.