Somatic IDH1 Hotspot Variants in Chinese Patients With Pheochromocytomas and Paragangliomas.
J Clin Endocrinol Metab
; 108(5): 1215-1223, 2023 04 13.
Article
en En
| MEDLINE
| ID: mdl-36355572
ABSTRACT
CONTEXT IDH1 is a pheochromocytoma/paraganglioma (PPGL) susceptibility gene; however, its role, especially in the Chinese population, has not been characterized. OBJECTIVE:
To determine the prevalence of somatic IDH1 hotspot variants in a large cohort of Chinese patients with PPGLs and to summarize associated phenotypes.METHODS:
This retrospective cross-sectional study was based on a main cohort of 1141 patients with PPGLs from 2 tertiary-care centers in China. We included 50 cases with urinary bladder paragangliomas (UBPGLs), of whom 29 were part of the main cohort and 21 were from other centers. Two additional cases with IDH1 hotspot variants not part of the main cohort were also included for summarizing IDH1-associated phenotypes. Next-generation sequencing of tumor DNA was used to analyze a customized panel of genes.RESULTS:
The overall prevalence of IDH1 hotspot variants in the main cohort was 0.5% (6/1141). Among those PPGLs without mutations in 15 common driver genes, the prevalence of IDH1 variants was 0.9% (4/455). When restricted to paraganglioma (PGL) without mutations, the prevalence reached 4.7% (4/86). Among UBPGLs, IDH1 hotspot variants accounted for 8% (4/50). Together, all 10 patients (9 PGLs and 1 pheochromocytoma) with IDH1 hotspot variants, including 3 females with concurrent EPAS1 hotspot variants, had apparently sporadic tumors, without metastasis or recurrence. There were 3 patients with biochemical data, all showing a non-adrenergic phenotype.CONCLUSIONS:
The somatic IDH1 hotspot variants cause PPGL development in some Chinese patients, especially among those apparently sporadic PGLs with a non-adrenergic phenotype and without mutations in major PPGL driver genes.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Paraganglioma
/
Feocromocitoma
/
Neoplasias de las Glándulas Suprarrenales
/
Isocitrato Deshidrogenasa
Tipo de estudio:
Observational_studies
/
Risk_factors_studies
Límite:
Female
/
Humans
Idioma:
En
Revista:
J Clin Endocrinol Metab
Año:
2023
Tipo del documento:
Article
País de afiliación:
China