A microfluidic system for monitoring glucagon secretion from human pancreatic islets of Langerhans.

A microfluidic system for monitoring glucagon secretion from human pancreatic islets of Langerhans.
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DOI:
10.1039/d1ay00703c
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发表时间:
2021-08-28
期刊:
Analytical methods : advancing methods and applications
影响因子:
--
通讯作者:
Roper MG
Roper MG
中科院分区:
其他
文献类型:
--
作者:
Eaton WJ;Roper MG

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高血糖素是一种由29个氨基酸组成的多肽,由朗格汉斯胰岛内的α细胞释放,有助于提高血糖水平。虽然已经开发了大量的方法来定量测量从胰岛释放的胰岛素,但这些方法并没有很好地开发用于胰升糖素,尽管它在血糖调节中很重要。在这项工作中,开发了一种简单但坚固的微流控装置,用于夹持人胰岛并向其灌流葡萄糖。将灌流液收集成2分钟的组分,用均相时间分辨Förster共振能量转移(TRRET)夹心免疫分析法定量测定胰高血糖素。对微流控装置内流体流动的模拟表明,该装置在胰岛上产生了很低的剪应力,并且用标准的胰升糖素溶液对流动进行了表征,结果显示响应时间在2个分数(<4分钟)内。对来自多个捐赠者的人胰岛的研究结果显示,在整个刺激过程中,胰高血糖素要么“突然”释放,要么“持续”释放。该设备和方法的简单性和健壮性预计会吸引许多研究胰岛生理学的研究人员。设计了一种微流控装置,用于夹持人的朗格汉斯胰岛,以使用均相免疫分析方法监测胰升糖素的分泌。
Glucagon is a 29-amino acid peptide released from α-cells within pancreatic islets of Langerhans to help raise blood glucose levels. While a plethora of methodologies have been developed for quantitative measurement of insulin released from islets, such methods are not well developed for glucagon despite its importance in blood sugar regulation. In this work, a simple yet robust microfluidic device was developed for holding human pancreatic islets and perfuse them with glucose. The perfusate was collected into 2 min fractions and glucagon quantified using a homogeneous time-resolved Förster resonance energy transfer (TR-FRET) sandwich immunoassay. Simulation of fluid flow within the microfluidic device indicated the device produced low amounts of shear stress on islets, and characterization of the flow with standard glucagon solutions revealed response times within 2 fractions (<4 min). Results with human islets from multiple donors demonstrated either a “burst” of glucagon or a “sustained” glucagon release across the entire period of stimulation. The simplicity, yet robustness, of the device and method is expected to appeal to a number of researchers examining pancreatic islet physiology. A microfluidic device was designed to hold human pancreatic islets of Langerhans for monitoring glucagon secretion using a homogeneous immunoassay.
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