Article

An immunohistochemical procedure to detect patients with paraganglioma and phaeochromocytoma with germline SDHB, SDHC, or SDHD gene mutations: a retrospective and prospective analysis

Department of Pathology, Josephine Nefkens Institute, Erasmus MC, University Medical Center, Rotterdam, Netherlands.
The Lancet Oncology (Impact Factor: 24.73). 09/2009; 10(8):764-71. DOI: 10.1016/S1470-2045(09)70164-0
Source: PubMed

ABSTRACT Phaeochromocytomas and paragangliomas are neuro-endocrine tumours that occur sporadically and in several hereditary tumour syndromes, including the phaeochromocytoma–paraganglioma syndrome. This syndrome is caused by germline mutations in succinate dehydrogenase B (SDHB), C (SDHC), or D (SDHD) genes. Clinically, the phaeochromocytoma–paraganglioma syndrome is often unrecognised, although 10–30% of apparently sporadic phaeochromocytomas and paragangliomas harbour germline SDH-gene mutations. Despite these figures, the screening of phaeochromocytomas and paragangliomas for mutations in the SDH genes to detect phaeochromocytoma–paraganglioma syndrome is rarely done because of time and financial constraints. We investigated whether SDHB immunohistochemistry could effectively discriminate between SDH-related and non-SDH-related phaeochromocytomas and paragangliomas in large retrospective and prospective tumour series.

Download full-text

Full-text

Available from: Judith Favier, Feb 05, 2014
0 Followers
 · 
216 Views
  • Source
    • "Until present, the choice of which genes to be tested has been guided by clinical presentation and ex vivo biomarkers. Immunohistochemistry can be very well used to show the presence or absence of protein products [2] [3]. Metabolomics, or global metabolite profiling, which is a new technology of functional genomics, can be used for investigating metabolite changes associated with some gene mutations [4]. "
    [Show abstract] [Hide abstract]
    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 1H 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.
    Neoplasia (New York, N.Y.) 01/2015; 10(1). DOI:10.1016/j.neo.2014.10.010 · 5.40 Impact Factor
  • Source
    • "Deleterious mutations in any of the SDH genes invariably result in decreased SDH activity or a significant reduction or complete absence of the protein (Gill, et al. 2011; Korpershoek, et al. 2011; Rustin et al. 2002; van Nederveen, et al. 2009; Yang, et al. 2012). "
    [Show abstract] [Hide abstract]
    ABSTRACT: Warburg's metabolic hypothesis is based on the assumption that a cancer cell's respiration must be under attack, leading to its damage, in order to obtain increased glycolysis. Although this may not apply to all cancers, there is some evidence proving that primarily abnormally functioning mitochondrial complexes are indeed related to cancer development. Thus, mutations in complex II (succinate dehydrogenase (SDH)) lead to the formation of pheochromocytoma/paraganglioma. Mutations in one of the SDH genes (SDHx mutations) lead to succinate accumulation associated with very low fumarate levels, increased glutaminolysis, the generation of reactive oxygen species (ROS), and pseudohypoxia. This results in significant changes in signaling pathways (many of them dependent on the stabilization of hypoxia-inducible factor (HIF)) including oxidative phosphorylation, glycolysis, specific expression profiles, as well as genomic instability and increased mutability resulting in tumor development. Although there is currently no very effective therapy for SDHx-related metastatic pheochromocytomas/paragangliomas, targeting their fundamental metabolic abnormalities may provide a unique opportunity for the development of novel and more effective forms of therapy for these tumors.
    Endocrine Related Cancer 02/2014; DOI:10.1530/ERC-13-0398 · 4.91 Impact Factor
  • Source
    • "Two independent SdhbÀ/À clones were studied (c6 and c8). As previously reported for human tumors (Favier et al., 2009; van Nederveen et al., 2009), Sdhb-deficient cells completely lost SDHB protein production but had normal SDHA levels (Figure S2A). They displayed a selective loss of SDH/succinate cytochrome c reductase (SCCR) activity (Figures 2B, S2B, and S2C), accompanied by large increases in both intracellular (Figure 2C) and secreted (Figure S2D) succinate levels and abnormally small amounts of the following organic acids (fumarate and malate) produced by the TCA cycle. "
    [Show abstract] [Hide abstract]
    ABSTRACT: Paragangliomas are neuroendocrine tumors frequently associated with mutations in RET, NF1, VHL, and succinate dehydrogenase (SDHx) genes. Methylome analysis of a large paraganglioma cohort identified three stable clusters, associated with distinct clinical features and mutational status. SDHx-related tumors displayed a hypermethylator phenotype, associated with downregulation of key genes involved in neuroendocrine differentiation. Succinate accumulation in SDH-deficient mouse chromaffin cells led to DNA hypermethylation by inhibition of 2-OG-dependent histone and DNA demethylases and established a migratory phenotype reversed by decitabine treatment. Epigenetic silencing was particularly severe in SDHB-mutated tumors, potentially explaining their malignancy. Finally, inactivating FH mutations were identified in the only hypermethylated tumor without SDHx mutations. These findings emphasize the interplay between the Krebs cycle, epigenomic changes, and cancer.
    Cancer cell 05/2013; 23. DOI:10.1016/j.ccr.2013.04.018 · 23.89 Impact Factor
Show more