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Exosomes Derived From Human Adipose-Derived Stem Cells Inhibit Lipogenesis Involving Hedgehog Signaling Pathway.
Frontiers in Bioengineering and Biotechnology ( IF 5.7 ) Pub Date : 2021-08-31 , DOI: 10.3389/fbioe.2021.734810
Ziwan Ji 1 , Zhongming Cai 1 , Shuming Gu 1, 2 , Yucang He 1 , Zikai Zhang 1 , Tian Li 1 , Qing Wei 1 , Jingping Wang 1 , Chen Ke 1 , Liqun Li 1
Affiliation  

Since obesity impairs wound closure and adipose-derived exosomes (ADEs) regulate wound healing in clinical applications, we hypothesized that ADEs may inhibit adipogenesis of adipose-derived stem cells (ADSCs) to reduce the adverse effects of obesity on wound healing. Hedgehog (Hh) signaling has been previously shown to inhibit adipogenesis in ADSCs. The present study aimed to determine the role of ADEs in the adipogenesis of ADSCs and the Hh signaling pathway. ADSCs collected from human adipose tissues were co-cultured with ADEs and treated with an adipogenic inducer. qRT-PCR showed that ADEs could inhibit adipogenic differentiation of ADSCs and activate Hh signaling. The differences in the mRNA expression profiles of genes related to Hh signaling between the groups that were exposed to either high fat or low fat indicated that increased Hh signaling activation is necessary but not sufficient to inhibit adipogenic differentiation in the ADSC differentiation process. The Hh signaling pathway can be activated effectively by ADEs, especially during high-fat exposure after treatment with ADEs. Oil Red O staining of adipocytes suggested that ADEs inhibited not only adipogenic differentiation, but also lipogenesis in ADSCs. Overall, targeted activation of Hh signaling by ADEs reduced lipid accumulation in ADSCs and may be explored for clinical applications.

中文翻译:

源自人类脂肪干细胞的外泌体抑制涉及刺猬信号通路的脂肪生成。

由于肥胖会损害伤口闭合,脂肪来源的外泌体(ADEs)在临床应用中调节伤口愈合,我们假设 ADE 可能抑制脂肪来源干细胞(ADSCs)的脂肪生成,以减少肥胖对伤口愈合的不利影响。Hedgehog (Hh) 信号先前已被证明可抑制 ADSC 中的脂肪生成。本研究旨在确定 ADE 在 ADSC 脂肪生成和 Hh 信号通路中的作用。从人类脂肪组织中收集的 ADSC 与 ADE 共培养,并用脂肪生成诱导剂处理。qRT-PCR 显示 ADEs 可以抑制 ADSCs 的成脂分化并激活 Hh 信号。暴露于高脂肪或低脂肪的组之间与 Hh 信号相关的基因的 mRNA 表达谱的差异表明,增加 Hh 信号激活是必要的,但不足以抑制 ADSC 分化过程中的脂肪形成分化。Hh 信号通路可以被 ADE 有效激活,特别是在用 ADE 治疗后的高脂肪暴露期间。脂肪细胞的油红 O 染色表明 ADEs 不仅抑制脂肪形成分化,而且抑制 ADSCs 中的脂肪生成。总体而言,ADE 对 Hh 信号的靶向激活减少了 ADSC 中的脂质积累,可用于临床应用。Hh 信号通路可以被 ADE 有效激活,特别是在用 ADE 治疗后的高脂肪暴露期间。脂肪细胞的油红 O 染色表明 ADEs 不仅抑制脂肪形成分化,而且抑制 ADSCs 中的脂肪生成。总体而言,ADE 对 Hh 信号的靶向激活减少了 ADSC 中的脂质积累,可用于临床应用。Hh 信号通路可以被 ADE 有效激活,特别是在用 ADE 治疗后的高脂肪暴露期间。脂肪细胞的油红 O 染色表明 ADEs 不仅抑制脂肪形成分化,而且抑制 ADSCs 中的脂肪生成。总体而言,ADE 对 Hh 信号的靶向激活减少了 ADSC 中的脂质积累,可用于临床应用。
更新日期:2021-08-31
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