Inceptor as a regulator of brain insulin sensitivity.

Inceptor as a regulator of brain insulin sensitivity.
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DOI:
10.1038/s41598-023-36248-4
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发表时间:
2023-07-18
期刊:
影响因子:
4.6
通讯作者:
Ferris, Heather A.
Ferris, Heather A.
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Post, Lisa A.;Kulas, Joshua A.;Milstein, Joshua L.;Sebastian, Sarah V. L.;Hosseini-Barkooie, Seyyedmohsen;Stevenson, Max E.;Bloom, George S.;Ferris, Heather A.

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虽然历史上被认为是胰岛素不敏感的器官,但现在人们已经接受了胰岛素在大脑生理学中的作用。脑内胰岛素和IGF1信号的改变与神经系统疾病有关,但调节脑内胰岛素敏感性的分子因素仍不确定。在这项研究中,我们提出了一种最近被描述的蛋白质,称为启动子,可能在脑胰岛素和IGF1抵抗中发挥作用。我们研究了Inceptor在健康和患病神经组织中的分布,以了解该蛋白的分布,并研究它在胰岛素抵抗状态下可能发生的变化。我们发现,Inceptor实际上存在于小脑、海马体、下丘脑和大脑皮层的神经元中,雌性小鼠大脑皮质中的表达水平高于雄性小鼠。我们还证实了Inceptor与IR和IGF1R在脑内共定位。我们发现,在神经元培养中,Inceptor被击倒后,胰岛素受体信号几乎没有变化,或者在高脂饮食下,在小鼠的Inceptor水平上,或者在小鼠或人类组织中,在阿尔茨海默病(AD)组织中,Inceptor水平几乎没有什么不同。这些结果都为我们理解大脑中的Inceptor提供了重要的进步。第一阶段注册报告手稿于2022年8月9日原则上被接受。这篇手稿已于2022年8月24日通过开放科学论坛(OSF)注册,可在此处获得:https://osf.io/9q8sw.
While historically viewed as an insulin insensitive organ, it is now accepted that insulin has a role in brain physiology. Changes in brain insulin and IGF1 signaling have been associated with neurological diseases, however the molecular factors regulating brain insulin sensitivity remain uncertain. In this study, we proposed that a recently described protein, termed Inceptor, may play a role in brain insulin and IGF1 resistance. We studied Inceptor in healthy and diseased nervous tissue to understand the distribution of the protein and examine how it may change in states of insulin resistance. We found that Inceptor is in fact present in cerebellum, hippocampus, hypothalamus, and cortex of the brain in neurons, with higher levels in cortex of female compared to male mice. We also confirmed that Inceptor colocalized with IR and IGF1R in brain. We saw little difference in insulin receptor signaling following Inceptor knockdown in neuron cultures, or in Inceptor levels with high-fat diet in mouse or Alzheimer’s disease in mouse or human tissue. These results all provide significant advancements to our understanding of Inceptor in the brain. The Stage 1 registered report manuscript was accepted-in-principle on 9 August 2022. This manuscript was registered through Open Science Forum (OSF) on 24 August 2022 and is available here: https://osf.io/9q8sw.
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