These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Aptamer fluorescence anisotropy assays for detection of aflatoxin B1 and adenosine triphosphate using antibody to amplify signal change.
    Author: Li Y, Yu H, Zhao Q.
    Journal: RSC Adv; 2022 Mar 01; 12(12):7464-7468. PubMed ID: 35424710.
    Abstract:
    Fluorescence polarization/anisotropy (FP/FA) is an attractive technology for determining small molecules in homogeneous solution based on rotation changes of a fluorescent reporter. Binding induced conformation change is a specific property of aptamers. This property has been integrated into aptamer based FA assays for small molecules. In this work, we reported aptamer FA assays for aflatoxin B1 (AFB1) and adenosine triphosphate (ATP) by using antibody conjugated complementary DNA at the 3' end and a fluorescein (FAM)-labeled aptamer at the 5' end. The hybridization of aptamer and cDNA induced a FAM label close to the large-sized antibody, which restricts the local rotation of FAM and gives high FA signal. With the addition of target, the aptamer probe binds with the target, and the aptamer-cDNA duplex is inhibited, causing FA signal decreases. This method achieved detection of 25 pM AFB1 and 1 μM ATP, respectively. The assay is promising for application.
    [Abstract] [Full Text] [Related] [New Search]