A portable all-in-one microfluidic device with real-time colorimetric LAMP for HPV16 and HPV18 DNA point-of-care testing
Biosens Bioelectron. 2023 Dec 22;248:115968. doi: 10.1016/j.bios.2023.115968. Online ahead of print.ABSTRACTScreening for high-risk human papillomavirus (HPV) infection is one of the most important preventative measures for cervical cancer. However, fast, convenient, and low-cost HPV detection remains challenging, especially in resource-limited settings. Here, we report a portable all-in-one device (PAD) for point-of-care testing (POCT) for HPV16 and HPV18 DNA in cervical swabs. The PAD was engineered to integrate modules for extraction-free sample lysis, loop-mediated isothermal amplification (LAMP) with lyophilized reagent beads, and real-time colorimetric signal sensing into a single miniaturized device, considerably shortening the sample-to-result time to 15 min. The precision liquid handling in the completely sealed microfluidic chip is achieved by a uniquely designed pressure-balanced automatic liquid flow mechanism, thereby eliminating the need for manual manipulation of liquids and thus the risk of biohazards. The PAD employs an improved real-time colorimetric LAMP (rcLAMP) assay with a limit of detection (LOD) of 1 copy/μL, enabled by enhanced assay chemistry to maximize the reaction kinetics. To validate this device for clinical application, we tested 206 clinical cervical swab samples and obtained a sensitivity of 92.1% and a specificity of 99.0%. This custom PAD enabled by microfluidic and electronic engineering techniques can be configured for the simultaneous d...
Source: Biosensors and Bioelectronics - Category: Biotechnology Authors: Hao Bai Yuqing Liu Linbo Gao Tao Wang Xiaoli Zhang Jie Hu Lisha Ding Yueting Zhang Qian Wang Lei Wang Jianlong Li Zhifeng Zhang Yang Wang Chenlan Shen Binwu Ying Xiaoyu Niu Wenchuang Hu Source Type: research
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