Citation: LI Yingying, WANG Dingyi, NONG Qiying, LIU Lihong, ZHANG Meng, LIANG Yong, HU Ligang, HE Bin, JIANG Guibin. 3D printed portable gel electrophoresis device for rapid detection of proteins[J]. Chinese Journal of Chromatography, ;2020, 38(11): 1316-1322. doi: 10.3724/SP.J.1123.2020.02018 shu

3D printed portable gel electrophoresis device for rapid detection of proteins

LI Yingying ^1,2 ,
WANG Dingyi ² ,
NONG Qiying ² ,
LIU Lihong ² ,
ZHANG Meng ¹ ,
LIANG Yong ^1,3 ,
HU Ligang ^1,2,, ,
HE Bin ² ,
JIANG Guibin ²

1.
Institute of Environment and Health, Jianghan University, Wuhan 430056, China;
2.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;
3.
Hubei Key Laboratory of Environmental and Health Hazards of Persistent Toxic Substances, Wuhan 430056, China

Corresponding author: HU Ligang, lghu@rcees.ac.cn
Received Date: 26 February 2020

Fund Project: National Natural Science Foundation of China (Nos. 21577153, 91743203).

The growing demand for rapid, portable, and economical detection methods for environmental analysis has resulted in increasing demands on the portability and miniaturization of analytical instruments. The miniaturization of scientific instruments facilitates analysis in the field of medicine, food, and environment, especially for the under-resourced areas. The gel electrophoresis devices currently available for protein separation are primarily used in laboratories. Miniaturized instruments that can be used for on-site and rapid separation of protein have not yet been reported. In this study, a portable gel electrophoresis device for rapid separation and detection of proteins was developed and manufactured by 3D printing in a laboratory, which was economical, convenient, and quick. First, four kinds of portable gel electrophoresis devices that included three kinds of columnar gel and one slab gel electrophoresis device were designed with computer-aided design software SolidWorks 2017 (Dassault Systemes SE, France); the components including gel tubes, gel plates, and gel electrophoresis tanks were then printed using a 3D printer after optimization of the printing parameters. Then, the performance of the four kinds of gel electrophoresis devices was investigated using prestained protein molecular weight standards. The results showed that the single-channel slab gel electrophoresis design can quickly separate proteins with the best separation efficiency. Moreover, the effect of different separation gel lengths (5, 10, 15, and 20 mm) on protein separation was studied and it was found that 10% separation gels with a length of 5 mm could effectively separate prestained protein molecular weight standards (in the range of 15-250 kD) in 20 minutes. Next, the battery was optimized for the portable GE device and a 25 V lithium battery (70 mm×60 mm×40 mm) was used as the power supply, which could provide a constant voltage of 25 V for 100 hours during gel electrophoresis. Then, the One-Step Blue^TM reagent (Biotium, USA) was used to color the separation results of the five standard proteins (carbonic anhydrase, ovalbumin, bovine serum albumin, conalbumin, ribonuclease A), and the results were recorded by mobile phone. Finally, the proposed gel electrophoresis device was compared with the commercial device. The results showed that the two devices are comparable; however, the slab gel electrophoresis was faster, portable, and economical.
In summary, this research designed and manufactured a portable gel electrophoresis device using 3D printing technique, which can be used for on-site analysis and detection of proteins. The device presents the following advantages compared with the commercial devices:1) small and portable:the size of the electrophoresis tank of the device is only 15 mm×20 mm×17 mm and the 25 V lithium battery has a working time of approximately 100 hours; 2) low cost:it can be processed in 5 hours using 3D printing technology, with 10 mL of printing material while the total cost is less than 400 RMB; 3) fast separation:this device can quickly achieve protein separation compared with commercial devices and can further use multiple electrophoresis tanks in parallel to analyze more samples at the same time. Besides, this research also highlights the advantages of 3D printing for the development of miniaturized analytical equipment. Though this study has achieved preliminary results for rapid separation of proteins using gel electrophoresis devices, the quantitative analysis of proteins following protein detection and the application of more samples need further research. Meanwhile, the continued application of 3D printing technology will promote the development of miniaturized and portable experimental equipment.
- gel electrophoresis,
- 3D printing,
- protein,
- portable,
- separation
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