Adipocyte ADAM17 plays a limited role in metabolic inflammation.

Adipocyte ADAM17 plays a limited role in metabolic inflammation.
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脂肪细胞ADAM17在代谢性炎症中的作用有限。

DOI:
10.1080/21623945.2020.1814544
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发表时间:
2020-12
期刊:
影响因子:
3.3
通讯作者:
Martin RK
Martin RK
中科院分区:
生物学4区
文献类型:
--
作者:
Lownik JC;Farrar JS;Pearce JV;Celi FS;Martin RK

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ADAM 17、其底物和其天然抑制剂的作用在炎症(包括代谢性炎症)的背景下得到了充分研究,结果不一。先前的研究使用内源性ADAM 17抑制剂的过表达检查了整体ADAM 17敲低模型和ADAM 17抑制,结果显示代谢健康得到改善,代谢炎症减少。然而,还没有研究使用体内模型检查脂肪细胞ADAM 17的作用。在这项研究中,我们使用Adipoq-Cre表达小鼠与Adam 17-floxed小鼠杂交,建立了脂肪细胞特异性Adam 17敲除模型。使用这个模型,我们发现脂肪细胞ADAM 17的丢失在基线代谢反应中没有明显的作用。令人惊讶的是,在使用高脂饮食(HFD)的代谢应激状态下,我们观察到脂肪细胞ADAM 17对代谢表型以及炎症细胞群体的总体影响很小。使用全身代谢表型,我们表明,ADAM 17的损失对能量利用没有影响,无论是在基线状态,以及以下HFD。然而,最后,使用高参数流式细胞术,我们发现脂肪细胞ADAM 17的丢失改变了HFD后的巨噬细胞和嗜酸性粒细胞群。总的来说,这里介绍的研究对ADAM 17在代谢反应和代谢炎症中的作用有了更多的了解,特别是在脂肪细胞中。
The role of ADAM17, its substrates, and its natural inhibitor has been well studied in the context of inflammation, including metabolic inflammation, with mixed results. Previous studies examining global Adam17 knockdown models and ADAM17 inhibition using overexpression of endogenous ADAM17 inhibitors have shown improved metabolic health and decreased metabolic inflammation. However, there have been no studies examining the role of adipocyte ADAM17 using in vivo models. In this study, we developed an adipocyte-specific Adam17 knockout model using Adipoq-Cre-expressing mice crossed with Adam17-floxed mice. Using this model, we show that loss of adipocyte ADAM17 plays no evident role in baseline metabolic responses. Surprisingly, in a state of metabolic stress using high-fat diet (HFD), we observed that adipocyte ADAM17 had little effect overall on the metabolic phenotype as well as inflammatory cell populations. Using whole-body metabolic phenotyping, we show that loss of ADAM17 has no effect on energy utilization both at a baseline state as well as following HFD. However, lastly, using high-parameter flow cytometry, we show that loss of adipocyte ADAM17 alters macrophage and eosinophil populations following HFD. Overall, the studies presented here give more insight into the role of ADAM17 in metabolic responses and metabolic inflammation, specifically in adipocytes.
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