Metabolomics

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NMR based metabolomics study of Y2 receptor activation by neuropeptide Y in the SK-N-BE2 human neuroblastoma cell line


ABSTRACT: Neuropeptide Y (NPY) and its Y2 receptors (Y2R) play an important role in regulating growth of various tumors and are highly expressed in human neuroblastoma brain tumors. Cell lines derived from neuroblastoma brain tumors provide a good model to study the consequences of NPY activation of Y2R in tumor metabolism. In this study, the metabolic response to activation and inhibition of Y2R was examined in the human neuroblastoma cell line SK-N-BE2 using high-resolution nuclear magnetic resonance spectroscopy (NMR). Three treatments were evaluated: (1) activation of Y2R with NPY, (2) blocking Y2R with BIIE0246, and (3) treatment of cells with both NPY and BIIE. The largest metabolic changes were observed for NPY activation of Y2R. The principal response to NPY activation of Y2R was increased glycolysis (Warburg effect). Our results also showed depleted intracellular nutrients in NPY activated cells, which may have been due to the high rate of conversion of glucose to lactate, glycine and alanine. All amino acids except glutamine were increased in response to Y2R activation, implying increased autophagic degradation of proteins. TCA cycle intermediates were not detected, possibly due to low steady-state concentrations, but the increase of glutamate and its high correlation with glucose provided evidence of increased TCA activity. The changes of most metabolites observed upon NPY treatment were reversed with BIIE treatment. In summary, our study indicates that NPY activation of Y2R in human neuroblastoma cells stimulates glycolysis, glutaminolysis and possibly TCA activity.

INSTRUMENT(S): Bruker

SUBMITTER: Bo Wang 

PROVIDER: MTBLS104 | MetaboLights | 2014-10-01

REPOSITORIES: MetaboLights

Dataset's files

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Action DRS
MTBLS104 Other
FILES Other
a_MTBLS104_npy_study_metabolite_profiling_NMR_spectroscopy.txt Txt
i_Investigation.txt Txt
m_MTBLS104_npy_study_metabolite_profiling_NMR_spectroscopy_v2_maf.tsv Tabular
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