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De Novo ARID1B mutations cause growth delay associated with aberrant Wnt/β-catenin signaling.
Human Mutation ( IF 3.3 ) Pub Date : 2020-03-03 , DOI: 10.1002/humu.23990
Xiaomin Liu 1 , Guorui Hu 1 , Jun Ye 1 , Bin Ye 2 , Nan Shen 3 , Yue Tao 3 , Xia Zhang 1 , Yanjie Fan 1 , Huili Liu 1 , Zhigang Zhang 2 , Danfeng Fang 2 , Xuefan Gu 1 , Xi Mo 3 , Yongguo Yu 1
Affiliation  

Haploinsufficiency of ARID1B (AT-rich interaction domain 1B) has been involved in autism spectrum disorder, nonsyndromic and syndromic intellectual disability, and corpus callosum agenesis. Growth impairment is a major clinical feature caused by ARID1B mutations; however, the mechanistic link has not been elucidated. Here, we confirm that growth delay is a common characteristic of patients with ARID1B mutations, which may be associated with dysregulation of the Wnt/β-catenin signaling pathway. An analysis of patients harboring pathogenic variants of ARID1B revealed that nearly half had short stature and nearly all had below-average height. Moreover, the percentage of patients with short stature increased with age. Knockdown of arid1b in zebrafish embryos markedly reduced body length and perturbed the expression of both chondrogenic and osteogenic genes including sox9a, col2a1a, runx2b, and col10a1. Knockout of Arid1b in chondrogenic ATDC5 cells inhibited chondrocyte proliferation and differentiation. Finally, Wnt/β-catenin signaling was perturbed in Arid1b-depleted zebrafish embryos and Arid1b knockout ATDC5 cells. These data indicate that ARID1B modulates bone growth possibly via regulation of the Wnt/β-catenin pathway, and may be an appropriate target for gene therapy in disorders of growth and development.

中文翻译:

De Novo ARID1B突变导致与Wnt /β-catenin异常信号传导相关的生长延迟。

ARID1B(富含AT的相互作用域1B)的单倍剂量不足已参与自闭症谱系障碍,非综合征和综合征性智力障碍以及,体发育不全。生长障碍是由ARID1B突变引起的主要临床特征。但是,机械连接尚未阐明。在这里,我们确认生长延迟是ARID1B突变患者的共同特征,可能与Wnt /β-catenin信号通路的失调有关。对携带ARID1B病原体的患者进行的分析显示,近一半的人身材矮小,几乎所有人的身高都低于平均水平。而且,身材矮小的患者的百分比随着年龄的增长而增加。斑马鱼胚胎中的arid1b基因敲低显着缩短了体长,并扰乱了包括sox9a,col2a1a,runx2b和col10a1在内的成软骨和成骨基因的表达。敲除软骨细胞ATDC5细胞中的Arid1b抑制了软骨细胞的增殖和分化。最后,Wnt /β-catenin信号转导在耗竭Arid1b的斑马鱼胚胎和敲除Arid1b的ATDC5细胞中。这些数据表明,ARID1B可能通过调节Wnt /β-catenin途径来调节骨骼生长,并且可能是生长发育障碍基因治疗的合适靶标。Wnt /β-catenin信号在Arid1b缺失的斑马鱼胚胎和Arid1b敲除的ATDC5细胞中受到干扰。这些数据表明,ARID1B可能通过调节Wnt /β-catenin途径来调节骨骼的生长,并且可能是生长和发育疾病中基因治疗的合适靶标。Wnt /β-catenin信号在Arid1b缺失的斑马鱼胚胎和Arid1b敲除的ATDC5细胞中受到干扰。这些数据表明,ARID1B可能通过调节Wnt /β-catenin途径来调节骨骼的生长,并且可能是生长和发育疾病中基因治疗的合适靶标。
更新日期:2020-03-03
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