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Design of a Digital LAMP Detection Platform Based on Droplet Microfluidic Technology.

Liying JiangXianghao LanLinjiao RenMingzhu YangBo WeiYang Wang
Published in: Micromachines (2023)
Loop-mediated isothermal amplification (LAMP) is a rapid and high-yield amplification technology for specific DNA or RNA molecules. In this study, we designed a digital loop-mediated isothermal amplification (digital-LAMP)-functioning microfluidic chip to achieve higher sensitivity for detection of nucleic acids. The chip could generate droplets and collect them, based on which we could perform Digital-LAMP. The reaction only took 40 min at a constant temperature of 63 °C. The chip enabled highly accurate quantitative detection, with the limit of detection (LOD) down to 10 2 copies μL -1 . For better performance while reducing the investment of money and time in chip structure iterations, we used COMSOL Multiphysics to simulate different droplet generation ways by including flow-focusing structure and T-junction structure. Moreover, the linear structure, serpentine structure, and spiral structure in the microfluidic chip were compared to study the fluid velocity and pressure distribution. The simulations provided a basis for chip structure design while facilitating chip structure optimization. The digital-LAMP-functioning chip proposed in the work provides a universal platform for analysis of viruses.
Keyphrases
  • loop mediated isothermal amplification
  • high throughput
  • circulating tumor cells
  • sensitive detection
  • single cell
  • circulating tumor
  • quantum dots
  • molecular dynamics
  • nucleic acid