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在怀孕期间胰岛素敏感性变化期间,染色体19 miRNA集群成员的表达在怀孕期间发生变化

Fernanda Alvarado-Flores¹, Tianjiao Chu², Patrick Catalano³

¹Mount Sinai Chicago Hospital, Chicago, IL, USA.

|January 23, 2025

概括

胎盘微RNAs,特别是miR-517a-3p,与怀孕期间母亲胰岛素敏感性降低有关,可能会影响胎儿的生长. 这项研究研究了胎盘miRNA在与怀孕相关的胰岛素抵抗中的作用.

科学领域:

生殖生物学生殖生物学
内分泌学在内分泌学.
分子遗传学分子遗传学

背景情况:

怀孕涉及胰岛素敏感性的生理变化,对胎儿发育至关重要.
怀孕期间胰岛素敏感性受损会对胎儿生长产生负面影响.
这些胰岛素敏感性变化的胎盘起源被怀疑但尚未完全理解.

研究的目的:

为了研究胎盘微RNA (miRNA) 和孕妇在怀孕期间的胰岛素敏感性之间的关联.
为了确定特定的胎盘miRNA是否会影响骨肌肉中的胰岛素敏感机制.
探索胎盘miRNAs,母亲的胰岛素敏感性和胎儿生长结果之间的关系.

主要方法:

量化PCR (qPCR) 用于测量孕妇的血和胎盘组织中的miRNA表达.
人类骨肌肉髓质细胞在体外用miRNA模仿剂进行治疗,以评估对葡萄糖吸收的影响.
使用统计模型分析miRNAs,胰岛素敏感性和胎儿生长参数之间的关联.

主要成果:

19号染色体miRNA集群 (C19MC) 的胎盘表达,包括miR-517a-3p,在肥胖症中升高,与母亲的胰岛素抵抗 (HOMA-IR) 相相关.
胎盘miR-517a-3p与更高的后代脂肪和出生体重有关.
血miR-517a-3p水平与怀孕期间母亲胰岛素敏感性降低相关,在体外,miR-517a-3p和miR-524-3p损害了肌肉细胞的葡萄糖吸收.

结论:

C19MC的成员,特别是miR-517a-3p,在整个怀孕期间对胰岛素敏感性的生理调节中发挥作用.
这些miRNAs可能会通过影响母亲的胰岛素敏感性来影响胎儿的生长.
这些发现支持怀孕相关的胰岛素敏感性改变的胎盘起源.

关键词:

在C19MC miRNAs中.葡萄糖的吸收量葡萄糖的吸收胰岛素敏感性的原因胎盘胎盘胎盘胎盘怀孕怀孕怀孕怀孕骨肌细胞骨肌细胞

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