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Lamin A/C is Expressed in Pluripotent Mouse Embryonic Stem Cells

机译:Lamin A / C在多能小鼠胚胎干细胞中表达。

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The pluripotent nature of embryonic stem cells (ESC) is associated with a dynamic open chromatin state and an irregular nuclear shape. It has been postulated that the absence of Lamin A/C contributes to these features. However, we show that mouse ESCs express low, yet readily detectable, amounts of Lamin A/C at both the RNA and protein levels. Full-length transcripts of both isoforms were readily detected by q-PCR and deep RNA sequencing. Additionally, protein expression was validated in multiple primary and established ESC lines by immunoblotting using several independent antibodies. Immunofluorescence labeling showed localization of Lamin A/C at the nuclear periphery of all Oct4/Nanog double-positive ESC lines examined, as well as in the inner cell mass of blastocysts. Our results demonstrate ESCs do express low levels of Lamin A/C, thus models linking pluripotency and nuclear dynamics with the absence of Lamin A/C need to be revisited.
机译:胚胎干细胞(ESC)的多能性与动态的开放染色质状态和不规则的核形状有关。据推测,没有Lamin A / C有助于这些功能。但是,我们显示,小鼠ESC在RNA和蛋白质水平上均表达低但易于检测的Lamin A / C量。通过q-PCR和深RNA测序很容易检测到两种同工型的全长转录本。此外,通过使用几种独立抗体的免疫印迹,在多个主要和已建立的ESC品系中验证了蛋白表达。免疫荧光标记显示Lamin A / C定位在所有检查的Oct4 / Nanog双阳性ESC系的核外围以及囊胚的内部细胞团中。我们的结果表明,ESC确实表达了低水平的Lamin A / C,因此需要重新研究在缺乏Lamin A / C的情况下将多能性和核动力学联系起来的模型。

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