کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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2775205 | 1152315 | 2011 | 4 صفحه PDF | دانلود رایگان |
The application of commercially available microarray slides as substrates for fluorogenic protease assays has been explored in terms of binding efficiency, stability, and activity. A fluorescent, biotinylated substrate for botulinum neurotoxin A (BoNTA) was attached via self-assembled monolayer of Streptavidin to amine-reactive aldehyde, epoxy, hydrogel, and polymer slides. Nexterion Slide P® was found to have optimal protein binding efficiency and stability of the slides examined. Addition of glycerol to the printing buffer improved spot morphology significantly and polyvinylpyrrolidone provided long-term stability, allowing chips to be stored for up to 1 month with good viability. Detection of a recombinant BoNTA light chain was then carried out at 37 °C and a sub-lethal dose was detected in 2 hours.
► Microarray slides were tested as substrates for protease assay biosensors.
► Nexterion Slide P® had optimal signal-to-noise ratio and binding stability.
► Glycerol with humidity was found to improve spot morphology.
► Buffer additive PVP improved binding stability long-term and in assays.
► Botulinum neurotoxin A was detected in sub-lethal doses in 2 hours.
Journal: Experimental and Molecular Pathology - Volume 91, Issue 3, December 2011, Pages 714–717