title: A novel electrochemical biosensor for sensitive detection of telomerase activity based on structure-switching DNA.
abstract: Telomerase has been considered to be an important tumor biomarker for early cancer diagnostics and a valuable target for therapy treatment. A novel electrochemical biosensor based on structure-switching DNA probe with ferrocene (Fc) as the electroactive reporter to detect telomerase activity was developed. The developed approach displayed desirable dynamic range from 10(2) to 6 × 10(4) Hela cells mL(-1) with a detection limit of 100 Hela cells mL(-1). This biosensor afforded good reproducibility, stability and simple operations. It provided a useful platform for practical use in quantitative telomerase activity assay for clinical applications. Telomerase inhibitor performance was also investigated and the results indicated the approach was suitable for telomerase inhibitor screening research.
authors.affiliation: State Key Laboratory of Chemo/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China.
authors.forename: Zi
authors.initials: Z
authors.lastname: Yi
authors.forename: Hai-Bo
authors.initials: HB
authors.lastname: Wang
authors.forename: Ke
authors.initials: K
authors.lastname: Chen
authors.forename: Qing
authors.initials: Q
authors.lastname: Gao
authors.forename: Hao
authors.initials: H
authors.lastname: Tang
authors.forename: Ru-Qin
authors.initials: RQ
authors.lastname: Yu
authors.forename: Xia
authors.initials: X
authors.lastname: Chu
mesh_terms: D015374:Biosensing Techniques / Q000379:methods*; D004247:DNA / Q000737:chemistry*; D006046:Gold / Q000737:chemistry; D006367:HeLa Cells; D006801:Humans; D057230:Limit of Detection; D019098:Telomerase / Q000037:antagonists & inhibitors / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D006046:Gold; D004247:DNA; D019098:Telomerase
keywords: Electrochemical biosensor; Structure-switching DNA probe; Telomerase