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具有自主驱动离心微流控系统的自动微分配器集成多重酶联免疫吸附测定装置。

Automatic microdispenser-integrated multiplex enzyme-linked immunosorbent assay device with autonomously driven centrifugal microfluidic system.

作者信息

Okamoto Shunya, Nagai Moeto, Shibata Takayuki, Ukita Yoshiaki

机构信息

Toyohashi University of Technology, Department of Mechanical Engineering Japan

Toyohashi University of Technology, Institute for Research on Next-generation Semiconductor and Sensing Science (IRES2) Japan.

出版信息

RSC Adv. 2024 Apr 26;14(20):13827-13836. doi: 10.1039/d4ra02656j. eCollection 2024 Apr 25.

Abstract

In this study, we established the control and design theory of an autonomously driven dispenser at a steady rotation speed and proposed a dispenser-integrated multiplex enzyme-linked immunosorbent assay (ELISA) device. In establishing the theory of the dispenser, we estimated the flow rate in the dispenser and the applied pressure onto the passive valves, so that the suitable burst pressure of the valves and flow rate could be designed. The dispenser-integrated multiplex ELISA device has the potential to perform flow control for executing an ELISA of 6 samples/standards per chip or 18 samples/standards per compact disk by just steadily rotating a chip. In the immunoassay evaluation of the device using mouse IgG detection, it was confirmed that the device could assay 5 μL of several standards in just 30 min without nonspecific reactions, and although this system has a high limit of detection (LOD, 63.4-164 pg mL) it is equal to that of manual assay with a titer plate. The device can be fabricated by transferring the microchannel pattern from a mold without complex assembly or alignment, and it can control the liquid operation by just steadily rotating. Thus, the device system developed will contribute to reducing the cost of fabricating chips and control equipment for ELISA systems. Consequently, a compact, portable, and low-cost ELISA system for point-of-care testing is expected to be realized.

摘要

在本研究中,我们建立了以稳定转速自主驱动分配器的控制与设计理论,并提出了一种集成分配器的多重酶联免疫吸附测定(ELISA)装置。在建立分配器理论时,我们估算了分配器中的流速以及施加在无源阀上的压力,以便能够设计出合适的阀破裂压力和流速。集成分配器的多重ELISA装置具有通过稳定旋转芯片来执行每芯片6个样品/标准品或每光盘18个样品/标准品的ELISA的流量控制潜力。在使用小鼠IgG检测对该装置进行免疫测定评估时,证实该装置能够在30分钟内检测5μL的几种标准品且无非特异性反应,并且尽管该系统的检测限较高(LOD,63.4 - 164 pg/mL),但与使用滴定板的手动测定相当。该装置可以通过从模具转移微通道图案来制造,无需复杂的组装或对准,并且仅通过稳定旋转就能控制液体操作。因此,所开发的装置系统将有助于降低ELISA系统芯片和控制设备的制造成本。因此,有望实现一种用于即时检测的紧凑、便携且低成本的ELISA系统。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1cdf/11047056/6924e14c324f/d4ra02656j-f1.jpg

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