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2016 ; 44
(10
): e92
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A conformation-induced fluorescence method for microRNA detection
#MMPMID26951376
Aw SS
; Tang MX
; Teo YN
; Cohen SM
Nucleic Acids Res
2016[Jun]; 44
(10
): e92
PMID26951376
show ga
MicroRNAs play important roles in a large variety of biological systems and
processes through their regulation of target mRNA expression, and show promise as
clinical biomarkers. However, their small size presents challenges for tagging or
direct detection. Innovation in techniques to sense and quantify microRNAs may
aid research into novel aspects of microRNA biology and contribute to the
development of diagnostics. By introducing an additional stem loop into the
fluorescent RNA Spinach and altering its 3' and 5' ends, we have generated a new
RNA, Pandan, that functions as the basis for a microRNA sensor. Pandan contains
two sequence-variable stem loops that encode complementary sequence for a target
microRNA of interest. In its sensor form, it requires the binding of a target
microRNA in order to reconstitute the RNA scaffold for fluorophore binding and
fluorescence. Binding of the target microRNA resulted in large changes in
fluorescence intensity. The median fold change in fluorescence observed for the
sensors tested was ?50-fold. Pandan RNA sensors exhibit good signal-to-noise
ratios, and can detect their target microRNAs within complex RNA mixtures.