DNA-induced synthesis of biomimetic enzyme for sensitive detection of superoxide anions released from live cell.
Ailing DingBin WangXiaoqing MaJianglin DiaoJiushang ZhengJiucun ChenChang Ming LiPublished in: RSC advances (2018)
In this work, we successfully fabricate a rapid, sensitive sensor for the detection of superoxide anions O 2 ˙ - based on graphene/DNA/Mn 3 (PO 4 ) 2 biomimetic enzyme. In the design, graphene is served as excellent carrier to improve the catalysis of Mn 3 (PO 4 ) 2 nanoparticles; and DNA adsorbed on graphene acts as medium to assist the growth of Mn 3 (PO 4 ) 2 on graphene. The fabricated graphene/DNA/Mn 3 (PO 4 ) 2 composites exhibit excellently electrochemical activity, significantly decrease the response time and increase the sensitivity of the sensor towards O 2 ˙ - . The successful detection of O 2 ˙ - released from cancer cell demonstrated its potential applications in biology and medicine.
Keyphrases
- room temperature
- loop mediated isothermal amplification
- circulating tumor
- ionic liquid
- sensitive detection
- cell free
- single molecule
- walled carbon nanotubes
- visible light
- carbon nanotubes
- hydrogen peroxide
- nucleic acid
- transition metal
- gold nanoparticles
- quantum dots
- circulating tumor cells
- oxidative stress
- high glucose
- molecularly imprinted