title: Graphene surface-anchored fluorescence sensor for sensitive detection of microRNA coupled with enzyme-free signal amplification of hybridization chain reaction.
abstract: A new enzyme-free signal amplification-based assay for microRNA (miRNA) detection is developed by using hybridization chain reaction (HCR) coupled with a graphene oxide (GO) surface-anchored fluorescence signal readout pathway. MiRNAs can efficiently initiate HCR between two species of fluorescent hairpin probes. After HCR, both of the excess hairpin probes and the HCR products will be anchored on the GO surface. The fluorescence of the hairpin probes can be completely quenched by GO, whereas the HCR products maintain strong fluorescence. Therefore, integrating HCR strategy for signal amplification with selective fluorescence quenching effects of GO provides a versatile miRNA assay.
authors.affiliation: Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, Hebei Province, PR China.
authors.forename: Lang
authors.initials: L
authors.lastname: Yang
authors.forename: Chenghui
authors.initials: C
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Ren
authors.forename: Zhengping
authors.initials: Z
authors.lastname: Li
mesh_terms: D005453:Fluorescence; D006108:Graphite / Q000737:chemistry*; D057230:Limit of Detection; D035683:MicroRNAs / Q000032:analysis*; D009693:Nucleic Acid Hybridization; D013499:Surface Properties
chemical_list: D035683:MicroRNAs; D006108:Graphite