Isothermal detection of lncRNA using T7 RNA polymerase mediated amplification coupled with fluorescence-based sensor

Anal Biochem. 2021 Sep 15:629:114212. doi: 10.1016/j.ab.2021.114212. Epub 2021 Apr 16.

Abstract

In this study, the isothermal detection of a cervical cancer-associated long non-coding RNA (lncRNA), namely, lncRNA-ATB, was performed for the first time with high selectivity and sensitivity via a T7 RNA polymerase transcription-mediated amplification system combined with a graphene oxide (GO) fluorescence-based sensor. Specific lncRNA primers with the T7 promoter overhang were designed and further had with the efficient amplification ability of T7 RNA polymerase. This detection platform distinguished the target lncRNA-ATB from other lncRNAs. In addition, the super fluorescence quenching ability of GO resulted in the development of a switch on/off fluorescence sensor. The resulting platform was able to detect target lncRNAs from samples of cervical cancer cell lines (HeLa) and human sera with high selectivity and a low detection limit of 1.96 pg. Therefore, the assay developed in this study demonstrated a high potential as an alternative tool for lncRNA quantification in clinical diagnosis.

Keywords: Cervical cancer; Graphene oxide; Isothermal amplification; Long noncoding RNA; Reverse transcriptase; T7 RNA Polymerase.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Base Sequence
  • Biosensing Techniques
  • Cell Line, Tumor
  • DNA-Directed RNA Polymerases / metabolism*
  • Female
  • Graphite / chemistry
  • Humans
  • Limit of Detection
  • Nucleic Acid Amplification Techniques
  • RNA, Long Noncoding / analysis*
  • Sensitivity and Specificity
  • Spectrometry, Fluorescence
  • Surface Properties
  • Uterine Cervical Neoplasms / diagnosis*
  • Viral Proteins / metabolism*

Substances

  • RNA, Long Noncoding
  • Viral Proteins
  • graphene oxide
  • Graphite
  • bacteriophage T7 RNA polymerase
  • DNA-Directed RNA Polymerases