甲蓝作为基于核酸的侧流检测的新信号追踪器
Jurjaan Onayza Noim1, Dhruvi Kakadiya1, Stephanie Dang1
1Department of Biomedical Engineering, University of Calgary, 2500 University Dr NW, T2N 1N4, Calgary, AB, Canada.
Scientific reports
|October 14, 2025
概括
我们开发了MebiQue-LFA,一种新型的核酸侧流测定方法,使用甲蓝染料进行视觉检测. 这种分析提供了增强的灵敏度与电化学读取点的护理诊断.
科学领域:
- 生物技术是生物技术.
- 分析化学 分析化学
- 分子诊断学 分子诊断
背景情况:
- 侧流检测 (LFA) 被广泛用于快速诊断.
- 目前的LFA通常缺乏核酸检测的灵敏度和定量能力.
- 需要改进,具有成本效益的核酸检测平台.
研究的目的:
- 开发一种新型的核酸集成横向流量试验 (MebiQue-LFA).
- 为了利用甲蓝 (MB) 作为核酸检测的色度信号追踪器.
- 为了实现双模式检测 (视觉和电化学),提高灵敏度和量化.
主要方法:
- 开发MebiQue-LFA,其中包括甲蓝染料和电化学转导.
- 测试设计针对模型单链DNA序列.
- 在缓冲器,人工血液,血和血清样本中进行验证.
主要成果:
- 在缓冲 (0.62 fM) 和稀释血液 (43 fM) 中达到低检测极限 (DL).
- 证明了高的特异性,区分单基不匹配.
- 在复杂的生物基质 (血,血清) 中具有强大的性能,DL为16 pM.
- 具有成本效益 (约3CAD/测试),快速 (15分钟) 和稳定.
结论:
- MebiQue-LFA为核酸检测提供了一个敏感,特定和具有成本效益的平台.
- 双模式检测提高了 Point-of-Care 应用程序的可用性.
- 对于分散的诊断和移动读出兼容性的潜力.
相关概念视频
03:31Labeling DNA Probes
9.3K
DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...
9.3K
02:57Southern Blot
22.4K
Agarose gel electrophoresis is very useful in separating DNA fragments by size. Running a DNA ladder containing fragments of the known length alongside the sample helps determine the approximate length of the sample DNA fragments. However, additional steps are needed to verify the sequence identity of the sample DNA fragments.
Denatured DNA fragments must be transferred onto a carrier membrane from the gel to make it accessible to a probe - a small ssDNA fragment complementary to the target DNA...
Denatured DNA fragments must be transferred onto a carrier membrane from the gel to make it accessible to a probe - a small ssDNA fragment complementary to the target DNA...
22.4K