Role of MDH2 pathogenic variant in pheochromocytoma and paraganglioma patients.
Genet Med
; 20(12): 1652-1662, 2018 12.
Article
em En
| MEDLINE
| ID: mdl-30008476
ABSTRACT
PURPOSE:
MDH2 (malate dehydrogenase 2) has recently been proposed as a novel potential pheochromocytoma/paraganglioma (PPGL) susceptibility gene, but its role in the disease has not been addressed. This study aimed to determine the prevalence of MDH2 pathogenic variants among PPGL patients and determine the associated phenotype.METHODS:
Eight hundred thirty patients with PPGLs, negative for the main PPGL driver genes, were included in the study. Interpretation of variants of unknown significance (VUS) was performed using an algorithm based on 20 computational predictions, by implementing cell-based enzymatic and immunofluorescence assays, and/or by using a molecular dynamics simulation approach.RESULTS:
Five variants with potential involvement in pathogenicity were identified three missense (p.Arg104Gly, p.Val160Met and p.Ala256Thr), one in-frame deletion (p.Lys314del), and a splice-site variant (c.429+1G>T). All were germline and those with available biochemical data, corresponded to noradrenergic PPGL.CONCLUSION:
This study suggests that MDH2 pathogenic variants may play a role in PPGL susceptibility and that they might be responsible for less than 1% of PPGLs in patients without pathogenic variants in other major PPGL driver genes, a prevalence similar to the one recently described for other PPGL genes. However, more epidemiological data are needed to recommend MDH2 testing in patients negative for other major PPGL genes.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Paraganglioma
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Feocromocitoma
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Neoplasias das Glândulas Suprarrenais
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Malato Desidrogenase
Tipo de estudo:
Risk_factors_studies
Limite:
Adult
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article