核酸
生物传感器
注意事项
肉眼
炸薯条
检出限
核酸检测
纳米技术
化学
计算机科学
色谱法
材料科学
医学
生物化学
电信
护理部
作者
Di Huang,Yong Zhao,Mengjun Fang,Peijie Shen,Huaizhe Xu,Yichen He,Shengfu Chen,Zhenjun Si,Zhinan Xu
出处
期刊:Lab on a Chip
[The Royal Society of Chemistry]
日期:2023-01-01
卷期号:23 (19): 4265-4275
被引量:2
摘要
The CRISPR Cas system, as a novel nucleic acid detection tool, is often hindered by cumbersome experimental procedures, complicated reagent transfer processes, and associated aerosol pollution risks. In this study, an integrated nucleic acid detection platform named "up and down chip" was developed, which combined RT-RAA technology for nucleic acid amplification, DNase-dead Cas12a-modified magnetic beads for specific recognition of target nucleic acid, and HRP-TMB chromogenic reaction for signal output in different chambers of a single microfluidic chip. The magnetic beads were migrated in an up-and-down manner between different chambers through magnetic driving, achieving a "sample-in, result-out" detection mode. By introducing a homemade heating box for temperature control during the reaction and using the naked eye or a smartphone APP for color-based signal reading, no professional or precise instruments were required in this platform. Using this platform, highly sensitive detection of the HIV-1 genome as low as 250 copies (CPs) per mL was achieved within 100 min while maintaining good detection performance against common variants as well as excellent specificity and anti-interference ability. In addition, compared with qRT-PCR, it also exhibited good accuracy for 56 spiked plasma samples, indicating its promising potential for clinical application.
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