Paracrine role for endothelial IGF-1 receptor in white adipocyte beiging

Paracrine role for endothelial IGF-1 receptor in white adipocyte beiging
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白色脂肪细胞内皮 IGF-1 受体的旁分泌作用

DOI:
10.1101/2021.12.01.470734
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发表时间:
2021
期刊:
--
影响因子:
--
通讯作者:
Haywood N
Haywood N
中科院分区:
--
文献类型:
--
作者:
Haywood N

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哺乳动物中至少有两种不同类型的产热脂肪细胞:在发育过程中建立的预先存在的形式,称为经典棕色脂肪细胞和诱导型,“米色”脂肪细胞。各种环境因素可以刺激一个过程,经常被称为“beiging”的白色脂肪组织(WAT),导致增强的产热和肥胖抵抗力。虽然WAT作为肥胖症和肥胖症相关并发症的治疗目标已经引起了广泛的关注,但刺激肥胖而没有有害副作用的治疗仍然是难以捉摸的。内皮细胞排列在所有的血管中,因此与所有的细胞非常接近。许多研究支持内皮细胞作为旁分泌器官的可能性。我们探讨了内皮胰岛素样生长因子-1受体(IGF-1 R)作为WAT表型旁分泌调节剂的潜在作用。在这里,我们表明,在营养过剩的情况下,内皮IGF-1 R表达的减少导致白色脂肪细胞褐变,增加全身能量消耗,并通过非细胞自主旁分泌机制增强胰岛素敏感性。我们证明,这是由内皮细胞释放丙二酸,我们表明,使用前药类似物,具有潜在的治疗代谢性疾病的治疗相关的属性介导的。
There are at least two distinct types of thermogenic adipocyte in mammals: a pre-existing form established during development, termed classical brown adipocytes and an inducible form, ‘beige’ adipocytes–. Various environmental cues can stimulate a process frequently referred to as ‘beiging’ of white adipose tissue (WAT), leading to enhanced thermogenesis and obesity resistance,. Whilst beiging of WAT as a therapeutic goal for obesity and obesity-related complications has attracted much attention–; therapeutics stimulating beiging without deleterious side-effects remain elusive. The endothelium lines all blood vessels and is therefore in close proximity to all cells. Many studies support the possibility that the endothelium acts as a paracrine organ–. We explored the potential role of endothelial insulin-like growth factor-1 receptor (IGF-1R) as a paracrine modulator of WAT phenotype. Here we show that a reduction in endothelial IGF-1R expression in the presence of nutrient excess leads to white adipocyte beiging, increases whole-body energy expenditure and enhances insulin sensitivity via a non-cell autonomous paracrine mechanism. We demonstrate that this is mediated by endothelial release of malonic acid, which we show, using prodrug analogues, has potentially therapeutically-relevant properties in the treatment of metabolic disease.
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