Citation:
LI Zhu-Heng, GAO Jing-Qing, JIAN Ming-Hong, WANG Zhen-Xin. Fabrication of Lectin Microarray for Studying Interactions of Antibiotics with Staphylococcus aureus by Gold Nanoparticle Probes[J]. Chinese Journal of Analytical Chemistry,
;2018, 46(12): 1904-1912.
doi:
10.11895/j.issn.0253-3820.181570
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The lectin microarray-based resonance light scattering (RLS) assay has been developed to evaluate the interactions of Staphylococcus aureus (S. aureus) with three broad-spectrum antibiotics (amoxicillin, vancomycin and streptomycin). S. aureus was firstly captured by immobilized lectins on the substrate surface, and then labeled with Griffonia simplicifolia Ⅱ (GSⅡ) modified 38.5 nm gold nanoparticles (GNP@GSⅡ) for generating RLS signal. The investigation of the binding affinity of S. aureus with 16 lectins in the presence of antibiotics showed that amoxicillin and vancomycin could significantly reduce the expression level of glycans on S. aureus membrane, while streptomycin could increase the expression level of glycans on S. aureus membrane. The experimental result may suggest the different action mechanisms of antibiotics with S. aureus. Furthermore, the minimum inhibitory concentration (MIC) values and bactericidal efficiency of antibiotics could also be determined by the drug induced change of RLS intensity of GSⅡ subarray and lectin binding patterns of S. aureus, respectively.
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