Metabolome profiling by HRMAS NMR spectroscopy of pheochromocytomas and paragangliomas detects SDH deficiency: clinical and pathophysiological implications

Neoplasia. 2015 Jan;17(1):55-65. doi: 10.1016/j.neo.2014.10.010.

Abstract

Succinate dehydrogenase gene (SDHx) mutations increase susceptibility to develop pheochromocytomas/paragangliomas (PHEOs/PGLs). In the present study, we evaluate the performance and clinical applications of (1)H high-resolution magic angle spinning (HRMAS) nuclear magnetic resonance (NMR) spectroscopy-based global metabolomic profiling in a large series of PHEOs/PGLs of different genetic backgrounds. Eighty-seven PHEOs/PGLs (48 sporadic/23 SDHx/7 von Hippel-Lindau/5 REarranged during Transfection/3 neurofibromatosis type 1/1 hypoxia-inducible factor 2α), one SDHD variant of unknown significance, and two Carney triad (CTr)-related tumors were analyzed by HRMAS-NMR spectroscopy. Compared to sporadic, SDHx-related PHEOs/PGLs exhibit a specific metabolic signature characterized by increased levels of succinate (P < .0001), methionine (P = .002), glutamine (P = .002), and myoinositol (P < .0007) and decreased levels of glutamate (P < .0007), regardless of their location and catecholamine levels. Uniquely, ATP/ascorbate/glutathione was found to be associated with the secretory phenotype of PHEOs/PGLs, regardless of their genotype (P < .0007). The use of succinate as a single screening test retained excellent accuracy in distinguishing SDHx versus non-SDHx-related tumors (sensitivity/specificity: 100/100%). Moreover, the quantification of succinate could be considered a diagnostic alternative for assessing SDHx-related mutations of unknown pathogenicity. We were also able, for the first time, to uncover an SDH-like pattern in the two CTr-related PGLs. The present study demonstrates that HRMAS-NMR provides important information for SDHx-related PHEO/PGL characterization. Besides the high succinate-low glutamate hallmark, SDHx tumors also exhibit high values of methionine, a finding consistent with the hypermethylation pattern of these tumors. We also found important levels of glutamine, suggesting that glutamine metabolism might be involved in the pathogenesis of SDHx-related PHEOs/PGLs.

MeSH terms

  • Female
  • Humans
  • Immunohistochemistry
  • Male
  • Metabolic Networks and Pathways
  • Metabolome*
  • Metabolomics* / methods
  • Middle Aged
  • Models, Molecular
  • Mutation
  • Nuclear Magnetic Resonance, Biomolecular
  • Paraganglioma / diagnosis
  • Paraganglioma / genetics*
  • Paraganglioma / metabolism*
  • Pheochromocytoma / diagnosis
  • Pheochromocytoma / genetics*
  • Pheochromocytoma / metabolism*
  • Positron-Emission Tomography
  • Protein Structure, Secondary
  • ROC Curve
  • Sensitivity and Specificity
  • Succinate Dehydrogenase / chemistry
  • Succinate Dehydrogenase / deficiency
  • Succinate Dehydrogenase / genetics*
  • Succinate Dehydrogenase / metabolism*
  • Succinic Acid / chemistry
  • Succinic Acid / metabolism
  • Tomography, X-Ray Computed

Substances

  • Succinic Acid
  • Succinate Dehydrogenase