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Lin C, Wang Y, Huang Z, Guo Y, Wu W. Low Cost Three-Dimensional Programmed Mini-Pump Used in PCR. MICROMACHINES 2022; 13:mi13050772. [PMID: 35630239 PMCID: PMC9143699 DOI: 10.3390/mi13050772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/06/2022] [Accepted: 05/11/2022] [Indexed: 02/05/2023]
Abstract
Programmed mini-pumps play a significant role in various fields, such as chemistry, biology, and medicine, to transport a measured volume of liquid, especially in the current detection of (COVID-19) with PCR. In view of the cost of the current automatic pipetting pump being higher, which is difficult to use in a regular lab, this paper designed and assembled a three-dimensional programmed mini-pump with the common parts and components, such as PLC controller, motor, microinjector, etc. With the weighting calibration before and after pipetting operation, the error of the pipette in 10 μL (0.2%), 2 μL (1.8%), and 1 μL (5.6%) can be obtained. Besides, the contrast test between three-dimensional programmed mini-pump and manual pipette was conducted with the ORF1ab and pGEM-3Zf (+) genes in qPCR. The results proved that the custom-made three-dimensional programmed mini-pump has a stronger reproducibility compared with manual pipette (ORF1ab: 24.06 ± 0.33 vs. 23.50 ± 0.58, p = 0.1014; pGEM-3Zf (+): 11.83.06 ± 0.24 vs. 11.50 ± 0.34, p = 0.8779). These results can lay the foundation for the functional, fast, and low-cost programmed mini-pump in PCR or other applications for trace measurements.
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Affiliation(s)
- Chengxiong Lin
- National Engineering Research Center for Healthcare Devices, Guangdong Provincial Key Laboratory of Medical Electronic Instruments and Polymer Material Products, Institute of Biological and Medical Engineering, Guangdong Academy of Sciences, Guangzhou 510316, China; (C.L.); (Y.W.); (Z.H.); (Y.G.)
- School of Mechanical and Electrical Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Yaocheng Wang
- National Engineering Research Center for Healthcare Devices, Guangdong Provincial Key Laboratory of Medical Electronic Instruments and Polymer Material Products, Institute of Biological and Medical Engineering, Guangdong Academy of Sciences, Guangzhou 510316, China; (C.L.); (Y.W.); (Z.H.); (Y.G.)
| | - Zhengyu Huang
- National Engineering Research Center for Healthcare Devices, Guangdong Provincial Key Laboratory of Medical Electronic Instruments and Polymer Material Products, Institute of Biological and Medical Engineering, Guangdong Academy of Sciences, Guangzhou 510316, China; (C.L.); (Y.W.); (Z.H.); (Y.G.)
| | - Yu Guo
- National Engineering Research Center for Healthcare Devices, Guangdong Provincial Key Laboratory of Medical Electronic Instruments and Polymer Material Products, Institute of Biological and Medical Engineering, Guangdong Academy of Sciences, Guangzhou 510316, China; (C.L.); (Y.W.); (Z.H.); (Y.G.)
- School of Mechanical and Electrical Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Wenming Wu
- National Engineering Research Center for Healthcare Devices, Guangdong Provincial Key Laboratory of Medical Electronic Instruments and Polymer Material Products, Institute of Biological and Medical Engineering, Guangdong Academy of Sciences, Guangzhou 510316, China; (C.L.); (Y.W.); (Z.H.); (Y.G.)
- Correspondence:
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Park H, Jung W, Jang H, Namkoong K, Choi KY. One-Step RT-qPCR for Viral RNA Detection Using Digital Analysis. Front Bioeng Biotechnol 2022; 10:837838. [PMID: 35340840 PMCID: PMC8948435 DOI: 10.3389/fbioe.2022.837838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 01/24/2022] [Indexed: 11/20/2022] Open
Abstract
The rapid detection of viruses is becoming increasingly important to prevent widespread infections. However, virus detection via reverse transcription-quantitative polymerase chain reaction (RT-qPCR) is time-consuming, as it involves independent nucleic acid extraction and complementary DNA synthesis. This process limits the potential for rapid diagnosis and mass analysis, which are necessary to curtail viral spread. In this study, a simple and rapid thermolysis method was developed to circumvent the need for extraction and purification of viral RNA. The developed protocol was applied to one-chip digital PCR (OCdPCR), which allowed thermolysis, RT, and digital PCR in a single unit comprising 20,000 chambers of sub-nanoliter volume. Two viruses such as tobacco mosaic virus and cucumber mosaic virus were tested as model viral particles. First, the temperature, exposure time, and template concentration were optimized against tobacco mosaic viral particles, and the most efficient conditions were identified as 85°C, 5 min, and 0.01 μg/nL with a cycle threshold of approximately 33. Finally, the OCdPCR analysis yielded 1,130.2 copies/µL using 10−2 μg/nL of viral particles in a 30 min thermolysis-RT reaction at 70°C. This novel protocol shows promise as a quick, accurate, and precise method for large-scale viral analysis in the future.
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Affiliation(s)
- Hyuna Park
- Department of Environmental Engineering, College of Engineering, Ajou University, Suwon-si, South Korea
| | - Wonjong Jung
- Device Research Center, Advanced Sensor Lab, Samsung Advanced Institute of Technology, Samsung Electronics Co.Ltd., Suwon-si, South Korea
| | - Hyeongseok Jang
- Device Research Center, Advanced Sensor Lab, Samsung Advanced Institute of Technology, Samsung Electronics Co.Ltd., Suwon-si, South Korea
| | - Kak Namkoong
- Device Research Center, Advanced Sensor Lab, Samsung Advanced Institute of Technology, Samsung Electronics Co.Ltd., Suwon-si, South Korea
| | - Kwon-Young Choi
- Department of Environmental Engineering, College of Engineering, Ajou University, Suwon-si, South Korea
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