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BMP-2 and Sonic Hedgehog Have Contrary Effects on Adipocyte-Like Differentiation of C3H10T1/2 Cells

机译:BMP-2和声波刺猬对C3H10T1 / 2细胞的脂肪细胞样分化具有相反的作用

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摘要

The signaling pathways of bone morphogenic protein 2 (BMP-2) and Sonic hedgehog (Shh) are related during embryogenesis. Both proteins have been implicated as important components during osteogenic differentiation; e.g., considering their in vitro effects in the pluripotent C3H10T/1/2 cell system. Also, BMP-2 has been frequently reported to stimulate adipogenesis as well as osteogenesis in these cells. We investigated the relative potencies of Shh and BMP-2 with regard to adipogenesis. We performed differentiation experiments by stimulating C3H10T1/2 cells with BMP-2, Shh, or a combination. We monitored adipocyte-like differentiation via gene expression analysis and cytologic staining. An adipocytic phenotype was observed in BMP-2- treated cells, as shown by upregulation of two adipocytic marker mRNAs, PPAR-γ and aP2, and by staining of lipid-filled cell vesicles with Oil Red O. In contrast, no adipocyte-like differentiation could be detected either after treatment with Shh or after exposure to a combination of Shh and BMP-2. Our results demonstrate for the first time that Shh and BMP-2 have contrary effects on adipocyte-like differentiation. Whereas BMP2 promotes the adipocytic lineage, Shh suppresses the expression of the BMP-2-induced fat-cell phenotype.
机译:骨形态发生蛋白2(BMP-2)和声波刺猬(Shh)的信号传导通路在胚胎发生过程中相关。两种蛋白都被认为是成骨分化过程中的重要成分。例如,考虑其在多能C3H10T / 1/2细胞系统中的体外作用。同样,BMP-2经常被报道刺激这些细胞的脂肪生成以及成骨。我们研究了Shh和BMP-2在脂肪形成方面的相对效力。我们通过用BMP-2,Shh或它们的组合刺激C3H10T1 / 2细胞进行了分化实验。我们通过基因表达分析和细胞学染色监测脂肪细胞样分化。在BMP-2处理的细胞中观察到脂肪细胞表型,如两个脂肪细胞标记mRNA,PPAR-γ和aP2的上调以及用油红O染色脂质填充的细胞囊泡所显示。相反,没有脂肪样细胞样可以在用Shh治疗后或暴露于Shh和BMP-2的组合后检测到分化。我们的结果首次证明Shh和BMP-2对脂肪细胞样分化具有相反的作用。 BMP2促进脂肪细胞谱系,而Shh抑制BMP-2诱导的脂肪细胞表型的表达。

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