Optical Clearing in the Kidney Reveals Potassium-Mediated Tubule Remodeling

Optical Clearing in the Kidney Reveals Potassium-Mediated Tubule Remodeling
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肾脏的光学清除揭示了钾介导的肾小管重塑

DOI:
10.1016/j.celrep.2018.11.021
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发表时间:
2018
期刊:
影响因子:
8.8
通讯作者:
David Ellison
David Ellison
中科院分区:
生物学1区
文献类型:
--
作者:
Turgay Saritas;Victor G. Puelles;James A. McCormick;Paul Welling;David Ellison

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远端肾单位重塑有助于许多临床相关情况的病理生理学,包括利尿剂抵抗和某些孟德尔血压疾病。然而,组成性遗传破坏很可能有实质性的发展影响,在这一段,以及是否在生理刺激小管重塑是一个正常的稳态机制尚不清楚。由于远端肾单位作为一个钾传感器,我们评估了增殖和小管长度的三维饮食或诱导的遗传操作后,通过使用成年小鼠肾脏的光学清除,整体安装免疫标记,和先进的光学显微镜。我们发现,饮食钾限制导致迅速增殖的各种肾单位段,包括远曲小管,而破坏钾传感器Kir4.1引起萎缩,尽管环境低钾血症。这些结果提供了肾小管快速适应饮食的证据,并表明了清除方法评估健康和患病肾脏中细胞数量和小管长度的能力。
Distal nephron remodeling contributes to the pathophysiology of many clinically relevant scenarios, including diuretic resistance and certain Mendelian disorders of blood pressure. However, constitutive genetic disruptions are likely to have substantial developmental effects in this segment, and whether tubule remodeling upon physiological stimuli is a normal homeostatic mechanism is not known. Since the distal nephron acts as a potassium sensor, we assessed proliferation and tubule length in three dimensions upon dietary or inducible genetic manipulation by using optical clearing of adult mouse kidneys, whole-mount immunolabeling, and advanced light microscopy. We show that dietary potassium restriction leads promptly to proliferation of various nephron segments, including the distal convoluted tubule, whereas disruption of the potassium sensor Kir4.1 causes atrophy, despite ambient hypokalemia. These results provide proof that kidney tubules adapt rapidly to diet and indicate the power of clearing approaches to assess cell number and tubule length in healthy and diseased kidney.
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