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LncRNA-sequencing in a rat model of hypoxic pulmonary hypertension (HPH)

ABSTRACT: lncRNA-sequencing in a rat model of hypoxic pulmonary hypertension (HPH)

PROVIDER: PRJNA754361 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR15441725_1.fastq.gz	Fastqsanger.gz
	SRR15441725_2.fastq.gz	Fastqsanger.gz
	SRR15441726_1.fastq.gz	Fastqsanger.gz
	SRR15441726_2.fastq.gz	Fastqsanger.gz
	SRR15441727_1.fastq.gz	Fastqsanger.gz

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Project description:The potential roles of mRNAs and lncRNAs in the development and the reoxygenation treatment of reversal of hypoxic pulmonary hypertension are still unknown. 24 healthy adult male C57/BL6 mice were divided into three groups (normoxia group, hypoxia group, hypoxia-normoxia group), lncRNA and mRNA microarray was performed，meanwhile，the changes of right ven-tricular systolic pressure (RVSP) and other physiological indexes were measured in the three groups. The results showed that the index of RVSP, the right ventricular hypertrophy index RV/(LV+S), pulmonary artery walls and the muscularization ratio of pulmonary arterioles were significantly increased after Hypoxia treatment, while they were attenuated after the normoxia condition restored. Moreover, the study revealed there were 62 lncRNAs and 99 mRNAs with significant difference expression were associated with the reversal of hypoxic pulmonary hypertension by reoxygenation in mice. Furthermore, the pathway enrichment and gene ontology analysis of 99 DEGS were performed. Interestingly, the result suggested that chemokine subfamily CCL2/ CXCL played a role in the occurrence, development and reversion of pulmonary hypertension by reoxygenation. This study was the first time to demonstrate the transcriptome profiles of lncRNAs and mRNAs in the lung tissue during the reversal of hypoxic pulmonary hypertension in mice by reoxygenation, which might further broaden the understanding of the pathogenesis and the therapeutic effect of oxygen recovery of hypoxic pulmonary hypertension.

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Project description:17β-estradiol (E2) exerts complex and context-dependent effects in pulmonary hypertension. In hypoxia-induced pulmonary hypertension (HPH), E2 attenuates lung vascular remodeling through estrogen receptor (ER)-dependent effects; however, ER target genes in the hypoxic lung remain unknown. In order to identify the genome regulated by the E2-ER axis in the hypoxic lung, we performed a microarray analysis in lungs from HPH rats treated with E2 (75 mcg/kg/d) ± ER-antagonist ICI182,780 (3 mg/kg/d). Untreated HPH rats and normoxic rats served as controls. Using a false discovery rate of 10%, we identified a significantly differentially regulated genome in E2-treated vs. untreated hypoxia rats. Genes most up-regulated by E2 encoded matrix metalloproteinase 8, S100 calcium binding protein A8, and IgA Fc receptor; genes most down-regulated by E2 encoded olfactory receptor 63, secreted frizzled-related protein 2, and thrombospondin 2. Several genes affected by E2 changed in the opposite direction after ICI182,780 co-treatment, indicating an ER-regulated genome in HPH lungs. The bone morphogenetic protein antagonist Grem1 (gremlin 1) was up-regulated by hypoxia, but found to be among the most down-regulated genes after E2 treatment. Gremlin 1 protein was reduced in E2-treated vs. untreated hypoxic animals, and ER-blockade abolished the inhibitory effect of E2 on Grem1 mRNA and protein. In conclusion, E2 ER-dependently regulates several genes involved in proliferative and inflammatory processes during hypoxia. Gremlin 1 is a novel target of the E2-ER axis in HPH. Understanding the mechanisms of E2 gene regulation in HPH may allow for selectively harnessing beneficial transcriptional activities of E2 for therapeutic purposes.

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