Sox9-Meis1 Inactivation Is Required for Adipogenesis, Advancing Pref-1(+) to PDGFRα(+) Cells.

Sox9-Meis1 Inactivation Is Required for Adipogenesis, Advancing Pref-1(+) to PDGFRα(+) Cells.
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DOI:
10.1016/j.celrep.2018.09.086
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发表时间:
2018-10-23
期刊:
影响因子:
8.8
通讯作者:
Sul HS
Sul HS
中科院分区:
生物学1区
文献类型:
--
作者:
Gulyaeva O;Nguyen H;Sambeat A;Heydari K;Sul HS

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脂肪细胞来源于白色脂肪组织(WAT)中脂肪前体的定型和分化。在脂肪形成的研究中,前体标记物,包括Pref-1和PDGFRα,被用来从WAT的基质血管组分中分离前体,但标记物之间的关系尚不清楚。在这里,我们在小鼠中使用Pref-1启动子-rtTA系统来标记Pref-1+细胞并诱导Pref-1靶Sox 9的失活。我们显示了Sox 9对Pref-1+增殖性早期前体的维持的需求。在Sox 9失活后,这些Pref-1+细胞成为表达早期脂肪形成标志物的PDGFRα+细胞。因此,我们表明Pref-1+细胞先于PDGFRα+细胞在脂肪形成途径中,Sox 9失活是WAT生长和扩增所必需的。此外,我们表明,在维持早期脂肪前体,Sox 9激活Meis 1,阻止脂肪形成分化。我们的研究还证明了Pref-1启动子-rtTA系统在早期脂肪前体群体中可诱导基因失活。尚未研究Sox 9+、Pref-1+和PDGFRα+ WAT前体之间的关系。Gulyaeva等人表明Pref-1+细胞是早期脂肪前体,在Sox 9失活后,它们在脂肪形成途径的后期阶段变成PDGFRα+细胞。在维持Pref-1+脂肪前体的过程中,Sox 9激活Meis 1,从而阻止脂肪形成分化。
Adipocytes arise from the commitment and differentiation of adipose precursors in white adipose tissue (WAT). In studying adipogenesis, precursor markers, including Pref-1 and PDGFRα, are used to isolate precursors from stromal vascular fractions of WAT, but the relation among the markers is not known. Here, we used the Pref-1 promoter-rtTA system in mice for labeling Pref-1+ cells and for inducible inactivation of the Pref-1 target Sox9. We show the requirement of Sox9 for the maintenance of Pref-1+ proliferative, early precursors. Upon Sox9 inactivation, these Pref-1+ cells become PDGFRα+ cells that express early adipogenic markers. Thus, we show that Pref-1+ cells precede PDGFRα+ cells in the adipogenic pathway and that Sox9 inactivation is required for WAT growth and expansion. Furthermore, we show that in maintaining early adipose precursors, Sox9 activates Meis1, which prevents adipogenic differentiation. Our study also demonstrates the Pref-1 promoter-rtTA system for inducible gene inactivation in early adipose precursor populations. The relationship among Sox9+, Pref-1+, and PDGFRα+ WAT precursors has not been studied. Gulyaeva et al. show that Pref-1+ cells are early adipose precursors and, upon Sox9 inactivation, they become PDGFRα+ cells at a later stage of the adipogenic pathway. In maintaining Pref-1+ adipose precursors, Sox9 activates Meis1, which prevents adipogenic differentiation.
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