title: Microarray-based Raman spectroscopic assay for kinase inhibition by gold nanoparticle probes.
abstract: In this paper, a microarray-based surface-enhanced Raman spectroscopic (SERS) assay for detection of kinase functionality and inhibition has been reported. Biotinylated anti-phosphoserinen antibodies mark the phosphorylation and inhibition events and gold nanoparticles are attached to the antibodies by standard avidin-biotin chemistry, followed by silver deposition for SERS signal enhancement. The avidin conjugated fluorescein is used as SERS probe. The alpha-catalytic subunit of cyclic adenosine 5'-monophosphate (cAMP) dependent protein kinase (PKA), its well known substrate, kemptide, and three inhibitors, H89, HA1077, and KN62 have been chosen here to establish the SERS assay. As expected, highly selective inhibition of PKA is demonstrated with the inhibitor H89 and the inhibition assay enable to detect kinase inhibition as well as derive IC(50) (half maximal inhibitory concentration) plots.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Li
authors.forename: Dianjun
authors.initials: D
authors.lastname: Liu
authors.forename: Zhenxin
authors.initials: Z
authors.lastname: Wang
mesh_terms: D004789:Enzyme Activation / Q000187:drug effects; D006046:Gold / Q000737:chemistry*; D046228:Microarray Analysis / Q000379:methods*; D015336:Molecular Probe Techniques; D053758:Nanoparticles / Q000737:chemistry*; D010770:Phosphotransferases / Q000032:analysis / Q000037:antagonists & inhibitors*; D047428:Protein Kinase Inhibitors / Q000032:analysis / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods*
chemical_list: D047428:Protein Kinase Inhibitors; D006046:Gold; D010770:Phosphotransferases