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Mutation profiling in eight cases of vagal paragangliomas.
BMC Medical Genomics ( IF 2.1 ) Pub Date : 2020-09-18 , DOI: 10.1186/s12920-020-00763-4
Anna V Kudryavtseva 1 , Dmitry V Kalinin 2 , Vladislav S Pavlov 1 , Maria V Savvateeva 1 , Maria S Fedorova 1 , Elena A Pudova 1 , Anastasiya A Kobelyatskaya 1 , Alexander L Golovyuk 2 , Zulfiya G Guvatova 1 , George S Razmakhaev 3 , Tatiana B Demidova 4 , Sergey A Simanovsky 4 , Elena N Slavnova 3 , Andrey А Poloznikov 3 , Andrey P Polyakov 3 , Nataliya V Melnikova 1 , Alexey A Dmitriev 1 , George S Krasnov 1 , Anastasiya V Snezhkina 1
Affiliation  

Vagal paragangliomas (VPGLs) belong to a group of rare head and neck neuroendocrine tumors. VPGLs arise from the vagus nerve and are less common than carotid paragangliomas. Both diagnostics and therapy of the tumors raise significant challenges. Besides, the genetic and molecular mechanisms behind VPGL pathogenesis are poorly understood. The collection of VPGLs obtained from 8 patients of Russian population was used in the study. Exome library preparation and high-throughput sequencing of VPGLs were performed using an Illumina technology. Based on exome analysis, we identified pathogenic/likely pathogenic variants of the SDHx genes, frequently mutated in paragangliomas/pheochromocytomas. SDHB variants were found in three patients, whereas SDHD was mutated in two cases. Moreover, likely pathogenic missense variants were also detected in SDHAF3 and SDHAF4 genes encoding for assembly factors for the succinate dehydrogenase (SDH) complex. In a patient, we found a novel variant of the IDH2 gene that was predicted as pathogenic by a series of algorithms used (such as SIFT, PolyPhen2, FATHMM, MutationTaster, and LRT). Additionally, pathogenic/likely pathogenic variants were determined for several genes, including novel genes and some genes previously reported as associated with different types of tumors. Results indicate a high heterogeneity among VPGLs, however, it seems that driver events in most cases are associated with mutations in the SDHx genes and SDH assembly factor-coding genes that lead to disruptions in the SDH complex.

中文翻译:

八例迷走神经副神经节瘤的突变分析。

迷走神经副神经节瘤(VPGLs)属于一组罕见的头颈部神经内分泌肿瘤。VPGL 起源于迷走神经,比颈动脉副神经节瘤少见。肿瘤的诊断和治疗都提出了重大挑战。此外,对 VPGL 发病机制背后的遗传和分子机制知之甚少。在研究中使用了从俄罗斯人群的 8 名患者中获得的 VPGLs 的集合。使用 Illumina 技术进行外显子组文库制备和 VPGL 的高通量测序。基于外显子组分析,我们确定了 SDHx 基因的致病性/可能致病性变异,在副神经节瘤/嗜铬细胞瘤中经常发生突变。在三名患者中发现了 SDHB 变异,而在两名患者中发现了 SDHD 变异。而且,在编码琥珀酸脱氢酶 (SDH) 复合物组装因子的 SDHAF3 和 SDHAF4 基因中也检测到可能的致病性错义变异。在一名患者中,我们发现了 IDH2 基因的一种新变异,该变异被一系列使用的算法(例如 SIFT、PolyPhen2、FATHMM、MutationTaster 和 LRT)预测为致病性。此外,还确定了几种基因的致病性/可能致病性变异,包括新基因和一些先前报道的与不同类型肿瘤相关的基因。结果表明 VPGLs 之间存在高度异质性,然而,在大多数情况下,驱动事件似乎与 SDHx 基因和 SDH 组装因子编码基因的突变有关,这些突变导致 SDH 复合体的破坏。在一名患者中,我们发现了 IDH2 基因的一种新变异,该变异被一系列使用的算法(例如 SIFT、PolyPhen2、FATHMM、MutationTaster 和 LRT)预测为致病性。此外,还确定了几种基因的致病性/可能致病性变异,包括新基因和一些先前报道的与不同类型肿瘤相关的基因。结果表明 VPGLs 之间存在高度异质性,然而,在大多数情况下,驱动事件似乎与 SDHx 基因和 SDH 组装因子编码基因的突变有关,这些突变导致 SDH 复合体的破坏。在一名患者中,我们发现了 IDH2 基因的一种新变异,该变异被一系列使用的算法(例如 SIFT、PolyPhen2、FATHMM、MutationTaster 和 LRT)预测为致病性。此外,还确定了几种基因的致病性/可能致病性变异,包括新基因和一些先前报道的与不同类型肿瘤相关的基因。结果表明 VPGLs 之间存在高度异质性,然而,在大多数情况下,驱动事件似乎与 SDHx 基因和 SDH 组装因子编码基因的突变有关,这些突变导致 SDH 复合体的破坏。包括新基因和一些先前报道的与不同类型肿瘤相关的基因。结果表明 VPGLs 之间存在高度异质性,然而,在大多数情况下,驱动事件似乎与 SDHx 基因和 SDH 组装因子编码基因的突变有关,这些突变导致 SDH 复合体的破坏。包括新基因和一些先前报道的与不同类型肿瘤相关的基因。结果表明 VPGLs 之间存在高度异质性,然而,在大多数情况下,驱动事件似乎与 SDHx 基因和 SDH 组装因子编码基因的突变有关,这些突变导致 SDH 复合体的破坏。
更新日期:2020-09-20
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