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NUP188 Biallelic Loss of Function May Underlie a New Syndrome: Nucleoporin 188 Insufficiency Syndrome?
Molecular Syndromology ( IF 0.9 ) Pub Date : 2019-12-10 , DOI: 10.1159/000504818
Anna Sandestig 1 , Karolina Engström 1 , Alexander Pepler 2 , Ingela Danielsson 3 , Per Odelberg-Johnsson 3 , Saskia Biskup 2 , Anja Holz 2 , Margarita Stefanova 1
Affiliation  

There is no clearly established association between the gene NUP188 and human pathology. Only a few reports of patients with different clinical presentation and different heterozygous or compound heterozygous missense or splice region variants have been identified in several sequencing projects; however, a causative association between the clinical features and the identified variants has not been established. For the first time, we report 2 unrelated patients with 2 different homozygous nonsense gene variants of NUP188, p.Tyr96* and p.Gln113*, respectively. Although having different supposedly truncating mutations, the patients presented with strikingly comparable phenotypes including pre- and postnatal microcephaly, trigonocephaly, congenital bilateral cataract, microphthalmia, cleft lip and palate or high-arched palate, camptodactyly, rocker-bottom feet, heart anomalies, specific brain changes (such as loss of periventricular white matter), thin corpus callosum, and delayed myelinization. Both patients showed very similar facial features such as laterally extended arched eyebrows, wide convex nose with a wide prominent nasal bridge, and prominent angulated antihelix. They were both born small for gestational age and died shortly after birth at the age of 67 and 140 days, respectively, as a result of central respiratory failure. Our findings strongly suggest a correlation between the homozygous nonsense gene variants of NUP188 and a severe phenotype of a new developmental syndrome with poor prognosis resulting from nucleoporin 188 homolog protein insufficiency.

中文翻译:

NUP188双等位基因功能丧失可能是一种新的综合征:核蛋白188不足综合征吗?

NUP188基因与人类病理之间没有明确建立的关联。在几个测序项目中,仅发现了几例具有不同临床表现和不同杂合或复合杂合错义或剪接区变异的患者的报道;然而,尚未确定临床特征与所鉴定的变体之间的因果关系。首次,我们报告了2位无亲缘关系的患者,分别患有2种不同的NUP188,p.Tyr96 *和p.Gln113 *纯合性无义基因变体。尽管这些患者的截短突变有所不同,但它们表现出惊人的相似表型,包括出生前和出生后的小头畸形,三角头畸形,先天性双眼白内障,小眼症,唇left裂或or弓状,高弓形,摇臂底脚,心脏异常,特定的大脑变化(例如脑室周围白质的丢失),体变薄和髓鞘延迟。两名患者均表现出非常相似的面部特征,例如侧向伸展的弓形眉毛,宽阔的凸鼻和宽阔的突出鼻梁以及突出的成角度的抗螺旋线。他们均因胎龄小而出生,出生后不久因中枢性呼吸衰竭而去世,享年67岁和140天。我们的发现强烈暗示NUP188的纯合性无义基因变体与新的发展综合征的严重表型之间的相关性,该综合征的预后较差,这是由于核孔蛋白188同源蛋白不足引起的。并延迟了髓鞘化。两名患者均表现出非常相似的面部特征,例如侧向伸展的弓形眉毛,宽阔的凸鼻和宽阔的突出鼻梁以及突出的成角度的抗螺旋线。他们均因胎龄小而出生,出生后不久因中枢性呼吸衰竭而去世,享年67岁和140天。我们的发现有力地表明,NUP188的纯合性无义基因变体与一种新的发育综合征的严重表型之间存在相关性,该综合征的预后较差,这是由于核孔蛋白188同源蛋白不足引起的。并延迟了髓鞘化。两名患者均表现出非常相似的面部特征,例如侧向伸展的弓形眉毛,宽阔的凸鼻和宽阔的突出鼻梁以及突出的成角度的抗螺旋线。他们均因胎龄小而出生,出生后不久因中枢性呼吸衰竭而去世,享年67岁和140天。我们的发现强烈暗示NUP188的纯合性无义基因变体与新的发展综合征的严重表型之间的相关性,该综合征的预后较差,这是由于核孔蛋白188同源蛋白不足引起的。他们均因胎龄小而出生,出生后不久因中枢性呼吸衰竭而去世,享年67岁和140天。我们的发现强烈暗示NUP188的纯合性无义基因变体与新的发展综合征的严重表型之间的相关性,该综合征的预后较差,这是由于核孔蛋白188同源蛋白不足引起的。他们均因胎龄小而出生,出生后不久因中枢性呼吸衰竭而去世,享年67岁和140天。我们的发现强烈暗示NUP188的纯合性无义基因变体与新的发展综合征的严重表型之间的相关性,该综合征的预后较差,这是由于核孔蛋白188同源蛋白不足引起的。
更新日期:2019-12-10
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