Picomolar-Level Sensing of Cannabidiol by Metal Nanoparticles Functionalized with Chemically Induced Dimerization Binders
Picomolar-Level Sensing of Cannabidiol by Metal Nanoparticles Functionalized with Chemically Induced Dimerization Binders
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通过化学诱导二聚化粘合剂功能化的金属纳米颗粒对大麻二酚进行皮摩尔水平传感
DOI:
10.1021/acssensors.3c01758
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发表时间:
2023
期刊:
影响因子:
8.9
通讯作者:
Wang, Chao
中科院分区:
文献类型:
--
作者:
Ikbal, M. D.;Kang, Shoukai;Chen, Xiahui;Gu, Liangcai;Wang, Chao
Simple and fast detection of small molecules is critical for health and environmental monitoring. Methods for chemical detection often use mass spectrometers or enzymes; the former relies on expensive equipment, and the latter is limited to those that can act as enzyme substrates. Affinity reagents like antibodies can target a variety of small-molecule analytes, but the detection requires the successful design of chemically conjugated targets or analogs for competitive binding assays. Here, we developed a generalizable method for the highly sensitive and specific in-solution detection of small molecules, using cannabidiol (CBD) as an example. Our sensing platform uses gold nanoparticles (AuNPs) functionalized with a pair of chemically induced dimerization (CID) nanobody binders (nanobinders), where CID triggers AuNP aggregation and sedimentation in the presence of CBD. Despite moderate binding affinities of the two nanobinders to CBD (equilibrium dissociation constantsKDof ∼6 and ∼56 μM), a scheme consisting of CBD–AuNP preanalytical incubation, centrifugation, and electronic detection (ICED) was devised to demonstrate a high sensitivity (limit of detection of ∼100 picomolar) in urine and saliva, a relatively short sensing time (∼2 h), a large dynamic range (5 logs), and a sufficiently high specificity to differentiate CBD from its analog, tetrahydrocannabinol. The high sensing performance was achieved with the multivalency of AuNP sensing, the ICED scheme that increases analyte concentrations in a small assay volume, and a portable electronic detector. This sensing system is readily applicable for wide molecular diagnostic applications.
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DOI:
--
发表时间:
1972
期刊:
影响因子:
--
作者:
C. Hornick;F. Karush
通讯作者:
F. Karush
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
茂垣里奈;大黒耕;相田卓三
通讯作者:
相田卓三
影响因子:
4.6
作者:
Smolinska-Kempisty K;Guerreiro A;Canfarotta F;Cáceres C;Whitcombe MJ;Piletsky S
通讯作者:
Piletsky S
影响因子:
2.9
作者:
Rich, Rebecca L.;Cannon, Michelle J.;Myszka, David G.
通讯作者:
Myszka, David G.
DOI:
10.1126/science.aao5902
发表时间:
2018-03-09
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Stanton BZ;Chory EJ;Crabtree GR
通讯作者:
Crabtree GR