1
|
Dumont E, De Bleye C, Cailletaud J, Sacré PY, Van Lerberghe PB, Rogister B, Rance GA, Aylott JW, Hubert P, Ziemons E. Development of a SERS strategy to overcome the nanoparticle stabilisation effect in serum-containing samples: Application to the quantification of dopamine in the culture medium of PC-12 cells. Talanta 2018; 186:8-16. [PMID: 29784422 DOI: 10.1016/j.talanta.2018.04.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 04/02/2018] [Accepted: 04/08/2018] [Indexed: 12/19/2022]
Abstract
The analysis of serum samples by surface-enhanced Raman spectroscopy (SERS) has gained ground over the last few years. However, the stabilisation of colloids by the proteins contained in these samples has restricted their use in common practice, unless antibodies or aptamers are used. Therefore, this work was dedicated to the development of a SERS methodology allowing the analysis of serum samples in a simple and easy-to-implement way. This approach was based on the pre-aggregation of the colloid with a salt solution. Gold nanoparticles (AuNPs) were used as the SERS substrate and, owing to its physiopathological importance, dopamine was chosen as a model to implement the SERS approach. The presence of this neurotransmitter could be determined in the concentration range 0.5-50 ppm (2.64-264 µM) in the culture medium of PC-12 cells, with a R2 of 0.9874, and at even lower concentrations (0.25 ppm, 1.32 µM) in another matrix containing fewer proteins. Moreover, the effect of calcium and potassium on the dopamine exocytosis from PC-12 cells was studied. Calcium was shown to have a predominant and dose-dependant effect. Finally, PC-12 cells were exposed to dexamethasone in order to increase their biosynthesis and release of dopamine. This increase was monitored with the developed SERS approach.
Collapse
Affiliation(s)
- E Dumont
- University of Liege (ULiege), CIRM, VibraSanté Hub, Department of Pharmacy, Laboratory of Pharmaceutical Analytical Chemistry, CHU, B36, B-4000 Liege, Belgium.
| | - C De Bleye
- University of Liege (ULiege), CIRM, VibraSanté Hub, Department of Pharmacy, Laboratory of Pharmaceutical Analytical Chemistry, CHU, B36, B-4000 Liege, Belgium
| | - J Cailletaud
- University of Liege (ULiege), CIRM, VibraSanté Hub, Department of Pharmacy, Laboratory of Pharmaceutical Analytical Chemistry, CHU, B36, B-4000 Liege, Belgium
| | - P-Y Sacré
- University of Liege (ULiege), CIRM, VibraSanté Hub, Department of Pharmacy, Laboratory of Pharmaceutical Analytical Chemistry, CHU, B36, B-4000 Liege, Belgium
| | - P-B Van Lerberghe
- University of Liege (ULiege), GIGA-Neurosciences, Laboratory of Developmental Neurobiology, CHU, B36, B-4000 Liege, Belgium
| | - B Rogister
- University of Liege (ULiege), GIGA-Neurosciences, Laboratory of Nervous System Disorders and Therapy, CHU, B36, B-4000 Liege, Belgium; Department of Neurology, CHU of Liège, B-4000 Liege, Belgium
| | - G A Rance
- University of Nottingham, Nanoscale and Microscale Research Centre, University Park, NG7 2RD Nottingham, United Kingdom
| | - J W Aylott
- University of Nottingham, School of Pharmacy, Laboratory of Biophysics and Surface Analysis, University Park, NG7 2RD Nottingham, United Kingdom
| | - Ph Hubert
- University of Liege (ULiege), CIRM, VibraSanté Hub, Department of Pharmacy, Laboratory of Pharmaceutical Analytical Chemistry, CHU, B36, B-4000 Liege, Belgium
| | - E Ziemons
- University of Liege (ULiege), CIRM, VibraSanté Hub, Department of Pharmacy, Laboratory of Pharmaceutical Analytical Chemistry, CHU, B36, B-4000 Liege, Belgium
| |
Collapse
|