Jump to main content
Jump to site search

Issue 12, 2017
Previous Article Next Article

Ultrasensitive electrochemical detection of Dicer1 3′UTR for the fast analysis of alternative cleavage and polyadenylation

Author affiliations

Abstract

Alternative cleavage and polyadenylation (APA) is involved in several important biological processes in animals, e.g. cell growth and development, and cancer progression. The increasing data show that cancer cells are inclined to produce mRNA isoforms with a shortened 3′UTR undergoing APA. For example, the Dicer1 isoform with a shorter 3′untranslated region (3′UTR) was found to be overexpressed in some cancer cells, which may be used as a potential novel prognostic biomarker for cancer. In the present work, a novel electrochemical biosensor for ultrasensitive determination of Dicer1 was designed by using gold nanoparticles and p-sulfonated calix[6]arene functionalized reduced graphene oxide (Au@SCX6-rGO) as nanocarriers. The results showed that the expressions of the shorter 3′UTR (Dicer1-S) both in BT474 and SKBR3 were obviously higher than those of the longer Dicer1 (Dicer1-L) by the constructed biosensor, which agreed well with the result analyzed by the RT-qPCR method. The detection ranges of Dicer1-S and Dicer1-L were 10−14–10−9 M and 10−15–10−10 M. The LODs were 3.5 and 0.53 fM. The specificity of the proposed biosensor was also very high. For the first time, the expressional analysis of different 3′UTRs caused by APA was studied by an electrochemical method. Moreover, the use of a macrocyclic host for constructing an electrochemical/biosensing platform has rarely been reported. The proposed electrochemical sensing strategy is thus expected to provide a new method for determination of novel biomarkers and a novel method for fast and cheap analysis of APA.

Graphical abstract: Ultrasensitive electrochemical detection of Dicer1 3′UTR for the fast analysis of alternative cleavage and polyadenylation

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 30 Nov 2016, accepted on 26 Feb 2017, published on 01 Mar 2017 and first published online on 01 Mar 2017


Article type: Paper
DOI: 10.1039/C6NR09300K
Citation: Nanoscale, 2017,9, 4272-4282
  •   Request permissions

    Ultrasensitive electrochemical detection of Dicer1 3′UTR for the fast analysis of alternative cleavage and polyadenylation

    H. Zhao, F. Liu, S. Wu, L. Yang, Y. Zhang and C. Li, Nanoscale, 2017, 9, 4272
    DOI: 10.1039/C6NR09300K

Search articles by author