Targeted mass spectrometry to monitor nuclear accumulation of endogenous Nrf2 and its application to SH-SY5Y cells stimulated with food components.

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Östreicher C, Gensberger-Reigl S, Pischetsrieder M
Zeitschrift: Analytical and Bioanalytical Chemistry
Jahr der Veröffentlichung: 2019
Band: 411
Heftnummer: 6
Seitenbereich: 1273-1286
ISSN: 1618-2642


Abstract

The Nrf2 signaling pathway is highly significant for redox homeostasis. Hence, nutrients and drugs activating Nrf2 can prevent oxidative stress-mediated medical conditions. After activation, Nrf2 accumulates in the cell nucleus; therefore, stimulation of Nrf2 by food components and drugs is usually monitored by measuring nuclear Nrf2 levels. The present study developed a targeted mass spectrometry method for the highly reliable quantification of nuclear Nrf2 levels. Three Nrf2-specific peptides were detected after enzymatic digestion of the nuclear fraction by the developed protocol for micro-liquid chromatography-tandem mass spectrometry in scheduled multiple reaction monitoring mode (microLC-MS/MS-sMRM). The method also identified nuclear Nrf2 unequivocally and specifically in the SDS-PAGE fraction of 100-150 kDa. Moreover, highly precise and linear relative quantification was achieved (mean relative standard deviation 8.3%; coefficient of determination 0.998). Incubation experiments in SH-SY5Y neuroblastoma cells revealed significantly up to 6-fold elevated nuclear Nrf2 levels after stimulation with 10 μM carnosol (rosemary), 10 μM sulforaphane (broccoli), or 20 μM cinnamaldehyde (cinnamon). Our results were in very good accordance with conventional Nrf2 western blotting and were highly correlated with the food components' effect on the expression levels of NAD(P)H dehydrogenase [quinone] 1 and thioredoxin reductase 1, two major Nrf2-regulated cytoprotective enzymes. The newly developed microLC-MS/MS-sMRM method shows broad applicability and can serve as a highly selective and reliable method to analyze Nrf2 activation. Graphical abstract ᅟ.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Gensberger-Reigl, Sabrina Dr.
Lehrstuhl für Lebensmittelchemie (Henriette-Schmidt-Burkhardt Lehrstuhl)
Östreicher, Christiane
Lehrstuhl für Lebensmittelchemie (Henriette-Schmidt-Burkhardt Lehrstuhl)
Pischetsrieder, Monika Prof. Dr.
Lehrstuhl für Lebensmittelchemie (Henriette-Schmidt-Burkhardt Lehrstuhl)


Zusätzliche Organisationseinheit(en)
Emil-Fischer-Zentrum (Emil Fischer Center)


Zitierweisen

APA:
Östreicher, C., Gensberger-Reigl, S., & Pischetsrieder, M. (2019). Targeted mass spectrometry to monitor nuclear accumulation of endogenous Nrf2 and its application to SH-SY5Y cells stimulated with food components. Analytical and Bioanalytical Chemistry, 411(6), 1273-1286. https://dx.doi.org/10.1007/s00216-018-1560-2

MLA:
Östreicher, Christiane, Sabrina Gensberger-Reigl, and Monika Pischetsrieder. "Targeted mass spectrometry to monitor nuclear accumulation of endogenous Nrf2 and its application to SH-SY5Y cells stimulated with food components." Analytical and Bioanalytical Chemistry 411.6 (2019): 1273-1286.

BibTeX: 

Zuletzt aktualisiert 2019-14-02 um 11:23