Development of a potential method based on microchip electrophoresis with fluorescence detection for the sensitive determination of intracellular thiols in RAW264.7 cells.
Electrophoresis
; 35(8): 1188-95, 2014 Apr.
Article
em En
| MEDLINE
| ID: mdl-24482111
ABSTRACT
This paper, for the first time, reported the development of a simple, rapid, and reliable method for the separation and sensitive determination of four thiol compounds including homocysteine, cysteine, glutathione, and N-acetylcysteine based on glass MCE with fluorescence detection using a highly reactive fluorogenic probe, 1,3,5,7-tetramethyl-8-phenyl-(2-maleimide)-difluoroboradiaza-s-indacene (TMPAB-o-M), as the labeling reagent. TMPAB-o-M reacted selectively with thiols to produce highly fluorescent derivatives and the highest derivatization efficiency was achieved within 6 min in physiological conditions. After the optimization of separation conditions, a baseline separation of the four thiol compounds was achieved with the detection limits ranging from 2 nM for glutathione to 4 nM for cysteine (S/N = 3) and RSDs (n = 5) in the range of 3.2-3.8%. The proposed method was significantly sensitive compared to those using electrochemical or even LIF detection in MCE-based setup reported previously, and applied to the determination of intracellular thiols in macrophage RAW264.7 cells.
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Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Acetilcisteína
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Compostos de Sulfidrila
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Cisteína
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Eletroforese em Microchip
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Glutationa
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Macrófagos
Tipo de estudo:
Diagnostic_studies
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Evaluation_studies
Limite:
Animals
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article