A chemiluminescence resonance energy transfer strategy and its application for detection of platinum ions and cisplatin
A novel chemiluminescence resonance energy transfer (CRET) system was developed and combined with a structure-switching aptamer for the highly sensitive detection of platinum. Platinum was chosen as a model analyte to demonstrate the generality of the new CRET system. This aptameric platform consisted of a streptavidin labeled aptamer against platinum and a streptavidin-coated magnetic bead for the selective separation of platinum-bound aptamer. The platinum–aptamer probe contained several guanine (G) bases bound to the 3,4,5-trimethoxyphenyl-glyoxal (TMPG) donor group at the 5′ end, a fluorescent acceptor (6-carboxy-2′,4,7,7′-tetrachlorofluorescein, TET) at the 3′ end, and a streptavidin aptamer sequence in which several base pairs were replaced by the G-G mismatch to induce the platinum-oligonucleotide coordination. The chemiluminescence (CL) generated by TMPG/G bases is transferred to the acceptor (TET). In the presence of platinum, the platinum–aptamer probe was folded such that the G bases at the 5′ end and TET at the 3′ were in close proximity. The complex was separated using streptavidin-coated magnetic beads by the addition of TMPG to form the TMPG/G bases complex. The ultraweak CL from the TMPG/G bases was strongly enhanced by TET. This novel CRET-based method can be easily performed with high limit of detection (50 ng·mL−1) and selectivity over other metal ions. This technique provides a novel method for simple, fast, and convenient point-of-care diagnostics for monitoring proteins and metal ions.
KeywordsCRET Streptavidin aptamer Platinum-oligonucleotide coordination Platinum aptameric platform Platinum detection
We acknowledge financial support from the Zhejiang Provincial Natural Science Foundation of China (LY18H300003), the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (2018R1C1B6001112), the National Natural Science Foundation of China (21405136, 81673399), the National Key Project of China (2017YFC0908600) and Scientific Research Fund of Zhejiang Provincial Education Department (Y201430444).
Compliance with ethical standards
The author(s) declare that they have no competing interests.
- 39.Moreno-Gordaliza E, Giesen C, Lazaro A, Esteban-Fernandez D, Humanes B, Canas B, Panne U, Tejedor A, Jakubowski N, Gomez-Gomez MM (2011) Elemental bioimaging in kidney by LA-ICP-MS as a tool to study nephrotoxicity and renal protective strategies in cisplatin therapies. Anal Chem 83(20):7933–7940CrossRefGoogle Scholar
- 40.Martincic A, Cemazar M, Sersa G, Kovac V, Milacic R, Scancar J (2013) A novel method for speciation of Pt in human serum incubated with cisplatin, oxaliplatin and carboplatin by conjoint liquid chromatography on monolithic disks with UV and ICP-MS detection. Talanta 116:141–148CrossRefGoogle Scholar
- 44.Ruttkay-Nedecky B, Skalickova S, Kremplova M, Nejdl L, Kudr J, Hynek D, Novotna M, Labuda J, Adam V, Kizek R (2015) Formation of G-quadruplex and its utilizing for an automated spectrometric detection of cisplatin. Int J Electrochem Sci 10(5):3973–3987Google Scholar