Analysis of intracellular enzyme activity by surface enhanced Raman scattering

Stevenson, R. et al. (2013) Analysis of intracellular enzyme activity by surface enhanced Raman scattering. Analyst, 138(21), pp. 6331-6336. (doi: 10.1039/c3an00729d)

Abstract

Dysfunctional intracellular enzymatic activity is believed to be an underlying cause of a myriad of diseases. We present the first use of surface enhanced Raman scattering (SERS) as a detection technique capable of reporting intracellular activity of a specific enzyme. Careful choice of reagents allowed the preparation of high resolution cellular activity maps highlighting the specific conversion of the commonly used ELISA reagent 5-bromo-4-chloro-3-indolyl β-D-galactopyranoside (X-Gal), by wild type β-galactosidase enzymes. Further, through co-addition of X-Gal substrate and inhibitors we were able to demonstrate that intracellular substrate conversion occurred predominantly through an enzymatically specific pathway. The data presented therefore supports the application of SERS probes as sensitive, specific sensors of biochemical activity and demonstrates the use of SERS probes for the first time as beacons capable of high resolution subcellular localisation of native enzymes.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Brewer, Professor James and Tetley, Dr Laurence
• Authors: Stevenson, R., McAughtrie, S., Senior, L., Stokes, R.J., McGachy, H., Tetley, L., Nativo, P., Brewer, J.M., Alexander, J., Faulds, K., and Graham, D.
• College/School: College of Medical Veterinary and Life Sciences > School of Life Sciences; College of Medical Veterinary and Life Sciences > School of Infection & Immunity
• Journal Name: Analyst
• ISSN: 0003-2654
• ISSN (Online): 1364-5528