Fetal pulmonary hypertension: dysregulated microRNA-34c-Notch1 axis contributes to impaired angiogenesis in an ovine model.

Fetal pulmonary hypertension: dysregulated microRNA-34c-Notch1 axis contributes to impaired angiogenesis in an ovine model.
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DOI:
10.1038/s41390-022-02151-3
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发表时间:
2023-02
期刊:
影响因子:
3.6
通讯作者:
Konduri GG
Konduri GG
中科院分区:
医学3区
文献类型:
--
作者:
Mukherjee D;Rana U;Kriegel AJ;Liu P;Michalkiewicz T;Konduri GG

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当出生时肺血管阻力(PVR)未能降低时,就会发生新生儿持续性肺动脉高压(PPHN)。肺部血管生成减少导致出生时高 PVR 持续存在。 MicroRNA (miRNA) 通过转录物结合和降解来调节基因表达。它们与癌症和心血管疾病中的血管生成失调有关。我们研究了 miRNA 水平的改变是否会导致 PPHN 中血管生成受损。我们使用产前动脉导管收缩和假结扎诱导的 PPHN 胎儿羔羊模型作为对照。我们对从对照羔羊和 PPHN 羔羊中分离出的肺动脉内皮细胞 (PAEC) 进行了 RNA 测序。我们观察到 PPHN 中器官发育、细胞间信号传导和心血管功能的差异表达 miRNA 谱。与对照组相比,MiR-34c 在 PPHN PAEC 中表达上调。体外,外源 miR34c 模拟物通过对照 PAEC 减少血管生成,而抗 miR34c 改善 PPHN PAEC 的血管生成。 Notch1 是生物信息学预测的 miR-34c 靶标,在 PPHN PAEC 中,Notch1 以及 Notch1 下游靶标 Hey1 和 Hes1 均减少。外源 miR-34c 降低了对照 PAEC 中的 Notch1 表达,而抗 miR-34c 恢复了 PPHN PAEC 中的 Notch1 和 Hes1 表达。我们得出的结论是,PPHN 中 miR-34c 的增加通过降低 PAEC 中的 Notch1 表达而导致血管生成受损。
Persistent pulmonary hypertension of the newborn (PPHN) occurs when pulmonary vascular resistance (PVR) fails to decrease at birth. Decreased angiogenesis in lung contributes to persistence of high PVR at birth. MicroRNAs (miRNAs) regulate gene expression through transcript binding and degradation. They were implicated in dysregulated angiogenesis in cancer and cardiovascular disease. We investigated whether altered miRNA levels contribute to impaired angiogenesis in PPHN. We used a fetal lamb model of PPHN induced by prenatal ductus arteriosus constriction and sham ligation as controls. We performed RNA-sequencing of pulmonary artery endothelial cells (PAECs) isolated from control and PPHN lambs. We observed a differentially expressed miRNA profile in PPHN for organ development, cell-cell signaling and cardiovascular function. MiR-34c was upregulated in PPHN PAECs compared to controls. Exogenous miR34c mimic decreased angiogenesis by control PAEC and anti-miR34c improved angiogenesis of PPHN PAEC in vitro. Notch1, a predicted target for miR-34c by bioinformatics, was decreased in PPHN PAECs, along with Notch1 downstream targets, Hey1 and Hes1. Exogenous miR-34c decreased Notch1 expression in control PAECs and anti-miR-34c restored Notch1 and Hes1 expression in PPHN PAECs. We conclude that increased miR-34c in PPHN contributes to impaired angiogenesis by decreasing Notch1 expression in PAECs.
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