由与 Moebius 综合征相关的胚系染色体重排引起的 semaphorin-plexin 通路的多基因截断。

Multigenic truncation of the semaphorin-plexin pathway by a germline chromothriptic rearrangement associated with Moebius syndrome.

机构信息

Wilhelm Johannsen Center for Functional Genome Research, Department of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen, Denmark.

Department of Regulation and Evaluation of Medicines and Health products, Faculty of Pharmacy, University of Lisbon, Lisbon, Portugal.

出版信息

Hum Mutat. 2019 Aug;40(8):1057-1062. doi: 10.1002/humu.23775. Epub 2019 May 14.

Abstract

Moebius syndrome (MBS) is a congenital disorder caused by paralysis of the facial and abducens nerves. Although a number of candidate genes have been suspected, so far only mutations in PLXND1 and REV3L are confirmed to cause MBS. Here, we fine mapped the breakpoints of a complex chromosomal rearrangement (CCR) 46,XY,t(7;8;11;13) in a patient with MBS, which revealed 41 clustered breakpoints with typical hallmarks of chromothripsis. Among 12 truncated protein-coding genes, SEMA3A is known to bind to the MBS-associated PLXND1. Intriguingly, the CCR also truncated PIK3CG, which in silico interacts with REVL3 encoded by the other known MBS-gene REV3L, and with the SEMA3A/PLXND1 complex via FLT1. Additional studies of other complex rearrangements may reveal whether the multiple breakpoints in germline chromothripsis may predispose to complex multigenic disorders.

摘要

Moebius 综合征(MBS)是一种由面神经和展神经麻痹引起的先天性疾病。虽然有许多候选基因被怀疑,但到目前为止,只有 PLXND1 和 REV3L 的突变被证实会导致 MBS。在这里,我们对一名 MBS 患者的复杂染色体重排(CCR)46,XY,t(7;8;11;13)进行了精细定位,揭示了 41 个具有典型染色体碎裂特征的簇状断点。在 12 个截断的蛋白编码基因中,SEMA3A 已知与 MBS 相关的 PLXND1 结合。有趣的是,该 CCR 还截断了 PIK3CG,PIK3CG 在计算机上与另一个已知的 MBS 基因 REV3L 编码的 REVL3 相互作用,并且通过 FLT1 与 SEMA3A/PLXND1 复合物相互作用。对其他复杂重排的进一步研究可能会揭示生殖细胞染色体碎裂中的多个断点是否可能导致复杂的多基因疾病。

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