Target-responsive dumbbell probe-mediated rolling circle amplification strategy for highly sensitive Hg2+ detection

RSC Advances ◽  
2014 ◽  
Vol 4 (51) ◽  
pp. 27091-27097 ◽  
Author(s):  
Qingwang Xue ◽  
Yanqin Lv ◽  
Yuanfu Zhang ◽  
Shuling Xu ◽  
Qiaoli Yue ◽  
...  
Keyword(s):  
Rolling Circle Amplification ◽  
Selective Detection ◽  
Label Free ◽  
Rolling Circle ◽  
Fluorescent Sensing ◽  
Highly Sensitive ◽  
Mercuric Ions ◽  
Amplification Strategy

A novel label-free amplified fluorescent sensing scheme based on target-responsive dumbbell probe-mediated rolling circle amplification (D-RCA) has been developed for sensitive and selective detection of mercuric ions.

scholarly journals A Label-Free Fluorescent Sensor Based on the Formation of Poly(thymine)-Templated Copper Nanoparticles for the Sensitive and Selective Detection of MicroRNA from Cancer Cells

Chemosensors ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 52
Author(s):  
Qian Ma ◽  
Zhiqiang Gao ◽  
Hiranya Dayal ◽  
Sam Fong Yau Li
Keyword(s):  
Cancer Cells ◽  
Copper Nanoparticles ◽  
Fluorescent Sensor ◽  
Rolling Circle Amplification ◽  
High Specificity ◽  
Excitation Wavelength ◽  
Selective Detection ◽  
Label Free ◽  
Rolling Circle ◽  
Highly Sensitive

In this work, a simple and label-free fluorescence “off” to “on” platform was designed for the sensitive and selective detection of microRNA (miRNA) in cancer cells. This method utilized a padlock DNA-based rolling circle amplification (P-RCA) to synthesize fluorescent poly(thymine) (PolyT) which acted as a template for the synthesis of copper nanoparticles (CuNPs) within 10 minutes under mild conditions. While the repeated PolyT sequence was used as the template for CuNP synthesis, other non-PolyT parts (single strand-DNAs without the capacity to act as the template for CuNP formation) served as “smart glues” or rigid linkers to build complex nanostructures. Under the excitation wavelength of 340 nm, the synthesized CuNPs emitted strong red fluorescence effectively at 620 nm. To demonstrate the use of this method as a universal biosensor platform, lethal-7a (let-7a) miRNA was chosen as the standard target. This sensor could achieve highly sensitive and selective detection of miRNA in the presence of other homologous analogues for the combination of P-RCA with the fluorescent copper nanoparticle. Overall, this novel label-free method holds great potential in the sensitive detection of miRNA with high specificity in real samples.

A cascade signal amplification strategy for sensitive and label-free DNA detection based on Exo III-catalyzed recycling coupled with rolling circle amplification

The Analyst ◽  
2014 ◽  
Vol 139 (11) ◽  
pp. 2884-2889 ◽  
Author(s):  
Xingti Liu ◽  
Qingwang Xue ◽  
Yongshun Ding ◽  
Jing Zhu ◽  
Lei Wang ◽  
...  
Keyword(s):  
Detection Method ◽  
Dna Detection ◽  
Rolling Circle Amplification ◽  
Label Free ◽  
Exonuclease Iii ◽  
Rolling Circle ◽  
Free Dna ◽  
Exo Iii ◽  
Amplification Strategy ◽  
Cascade Amplification

A sensitive and label-free DNA detection method was developed based on cascade amplification combining exonuclease-III recycling with rolling circle amplification.

A fluorescent biosensor for highly specific and ultrasensitive detection of adenosine triphosphate based on ligation-triggered branched rolling circle amplification

2019 ◽  
Vol 11 (36) ◽  
pp. 4629-4636
Author(s):  
Hongxin Jiang ◽  
Guimei Han ◽  
Yaping Xu ◽  
Junxing Li ◽  
Xiaowei Liu ◽  
...  
Keyword(s):  
Adenosine Triphosphate ◽  
Rolling Circle Amplification ◽  
Dna Ligase ◽  
Ultrasensitive Detection ◽  
Selective Detection ◽  
Rolling Circle ◽  
T4 Dna Ligase ◽  
Fluorescent Sensing ◽  
Fluorescent Biosensor

A fluorescent sensing strategy for ultrasensitive and highly selective detection of ATP was presented by taking advantage of the exponential amplification capability of BRCA and the extreme specificity of T4 DNA ligase toward ATP.

scholarly journals A dumbbell probe-mediated rolling circle amplification strategy for highly sensitive microRNA detection

2010 ◽  
Vol 38 (15) ◽  
pp. e156-e156 ◽  
Author(s):  
Yuntao Zhou ◽  
Qing Huang ◽  
Jimin Gao ◽  
Jianxin Lu ◽  
Xizhong Shen ◽  
...  
Keyword(s):  
Rolling Circle Amplification ◽  
Rolling Circle ◽  
Microrna Detection ◽  
Highly Sensitive ◽  
Amplification Strategy

A T7 exonuclease-RCA dual amplification system for high-sensitivity and high-selectivity analysis of microRNA

2019 ◽  
Vol 11 (18) ◽  
pp. 2450-2455 ◽  
Author(s):  
Yan Xu ◽  
Yan Li ◽  
Hongkun Zhou ◽  
Xiaoping Mei ◽  
Jieyun Ye ◽  
...  
Keyword(s):  
High Selectivity ◽  
Rolling Circle Amplification ◽  
High Sensitivity ◽  
Selective Detection ◽  
Rolling Circle ◽  
Highly Sensitive ◽  
Amplification System ◽  
Dual Amplification ◽  
T7 Exonuclease

A novel combination of rolling circle amplification and T7 exonuclease-assisted amplification to achieve highly sensitive and selective detection of microRNA molecules was developed.

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