Transcriptome analysis of ciliary-dependent MCH signaling in differentiating 3T3-L1 pre-adipocytes.

Transcriptome analysis of ciliary-dependent MCH signaling in differentiating 3T3-L1 pre-adipocytes.
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纤毛依赖性MCH信号在分化3T3-L1前脂肪细胞中的转录组分析。

DOI:
10.1038/s41598-021-84138-4
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发表时间:
2021-03-01
期刊:
影响因子:
4.6
通讯作者:
Galbier LA
Galbier LA
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Cook LB;Ophardt HD;Shen R;Pratt BH;Galbier LA

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了解脂肪细胞对 G 蛋白偶联受体 (GPCR) 衍生信号的反应必须考虑膜微环境的作用;各个蛋白质亚群在细胞的不同区域可能存在显着差异,并且细胞分化会改变这些微环境。 3T3-L1 前脂肪细胞在分化为脂肪细胞期间经历戏剧性的表型转变,需要短暂的初级纤毛的发育。我们证明,黑色素浓缩激素 (MCH) 受体 1(一种刺激食欲的 GPCR)在早期 3T3-L1 细胞脂肪形成过程中易位至短暂的初级纤毛。此外,我们使用RNA-Seq来研究MCH信号传导是否受其受体定位的影响以及MCH是否可以影响早期脂肪细胞发育的转录组。我们发现 MCH 信号传导对纤毛受体定位敏感,这会改变脂肪形成转录程序。此外,还鉴定了 3T3-L1 细胞中新的 MCH 信号通路,包括昼夜节律、炎症反应和纤毛生物发生的信号通路。前脂肪细胞中存在活跃的 MCH 信号通路,以及这些通路与早期脂肪形成程序相交叉的发现以及其他新发现的信号通路,表明使用 MCH 受体 1 拮抗剂进行临床干预可能会对脂肪组织发育产生意想不到的后果。
An understanding of adipocyte responsiveness to G-protein-coupled receptor-(GPCR) derived signals must take into consideration the role of membrane microenvironments; that individual sub-populations of proteins may vary significantly across different regions of the cell, and that cell differentiation alters those microenvironments. 3T3-L1 pre-adipocytes undergo a dramatic phenotypic transformation during differentiation into adipocytes, requiring the development of a transient primary cilium. We demonstrate that melanin-concentrating hormone (MCH) receptor 1, a GPCR that stimulates appetite, translocates to the transient primary cilium during early 3T3-L1 cell adipogenesis. Furthermore, we used RNA-Seq to investigate whether MCH signaling is influenced by its receptor localization and whether MCH can influence the transcriptome of early adipocyte development. We found that MCH signaling is sensitive to receptor localization to cilia, and this alters the adipogenic transcriptional program. Also, novel MCH signaling pathways in 3T3-L1 cells are identified, including those for circadian rhythm, the inflammatory response, and ciliary biogenesis. The presence of active MCH-signaling pathways in pre-adipocytes and the discovery that these pathways intersect with the early adipogenic program, among other newly-identified signaling pathways, suggests that the use of MCH receptor 1 antagonists for clinical interventions may have unintended consequences on adipose tissue development.
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