CRISPR/Cas12a平台由一个与原空间器相邻的基因工程DNA电路激活,用于特定的目标传感
Rui Wang1, Jiayue Li2, Yuchen Zheng1
1Institute of Biophysics, School of Pharmacy, Dezhou University, 253023 Dezhou, China. liwei_91@126.com.
Analytical methods : advancing methods and applications
|February 6, 2026
概括
这项研究引入了一个新的CRISPR/Cas12a诊断平台,使用PAM工程DNA电路来提高灵敏度. 这种多功能系统成功地检测了真实样本中循环的瘤DNA,酶和农药.
科学领域:
- 分子生物学分子生物学
- 生物技术是生物技术.
- 生物感应是一种生物感应.
背景情况:
- 克里斯普尔/卡斯系统被广泛用于核酸诊断.
- 将CRISPR/Cas应用扩展到非核酸点提出了一些挑战.
- 对多功能和灵敏的检测平台的需求至关重要.
研究的目的:
- 开发一个由一个原空间器相邻动机 (PAM) 设计的DNA电路激活的CRISPR/Cas12a平台.
- 调查PAM在CRISPR/Cas12a.a.的DNA电路激活中的作用.
- 为各种目标建立一个多功能传感平台.
主要方法:
- 开发一个PAM工程DNA电路来激活CRISPR/Cas12a.
- 研究PAM对DNA电路和Cas12a激活的影响.
- 针对目标特异性的识别元素的战略设计.
- 两个阶段的信号放大策略.
主要成果:
- 用PAM设计的DNA电路有效地激活Cas12a;没有PAM的电路不会.
- 实现了敏感检测,ctDNA的检测极限 (LODs) 为0.023 fM,UDG为0.00004 U/mL,ACE为0.12 fM.
- 展示了一种超越单个组件的双阶段信号放大机制.
- 在真实样本中验证了定量测定.
结论:
- 通过PAM工程设计的DNA电路激活的CRISPR/Cas12a平台提供了增强的灵敏度和多功能性.
- 该方法在分子诊断,食品安全和环境监测方面具有实用性.
- 这种多功能传感平台对未来的进步具有重大前景.
相关概念视频
CRISPR
58.0K
Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced...
58.0K
CRISPR and crRNAs
19.1K
Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
19.1K
What is Genetic Engineering?
80.3K
Overview
80.3K
The Sense of Self: Reflected Self-Appraisal and Social Comparison
56.1K
According to Charles Cooley, we base our image on what we think other people see (Cooley 1902). We imagine how we must appear to others, then react to this speculation. We don certain clothes, prepare our hair in a particular manner, wear makeup, use cologne, and the like—all with the notion that our presentation of ourselves is going to affect how others perceive us. We expect a certain reaction, and, if lucky, we get the one we desire and feel good about it. But more than that, Cooley...
56.1K
Eukaryotic Transcription Activators
12.8K
Transcription activators are proteins that promote the transcription of genes from DNA to RNA. In most cases, these proteins contain two separate domains ‒ a domain that binds to DNA and a domain for activating transcription; however, in some cases, a single domain is responsible for both binding and activation of transcription, as seen in the glucocorticoid receptor and MyoD.
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These...
The binding domains are capable of recognizing and interacting with regulatory sequences on the DNA. These...
12.8K
DNA Helicases
24.2K
DNA unwinding helicase enzymes are a type of motor protein. Motor proteins can translocate along filaments or polymers using energy generated from ATP hydrolysis. Helicases are involved in all the important cellular processes where DNA unwinding is required, such as DNA replication, repair, recombination, and transcription. They are present in all living organisms, but vary in their structure, function, and mechanism of action. For example, in prokaryotes, DnaB helicase binds and translocates...
24.2K


