FSCN1 as a Candidate Gene for Syndromic Intellectual Disability? Evidence From a Recurrent Variant in an Iranian Cohort.

IF 2.3 3区 医学 Q2 GENETICS & HEREDITY
Hossein Najmabadi, Tara Akhtarkhavari, Ebrahim Shokouhian, Sanaz Arzhangi, Kimia Kahrizi
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引用次数: 0

Abstract

Intellectual disability (ID) is a genetically heterogeneous disorder, and many causative genes remain unidentified. FSCN1 encodes an actin-bundling protein essential for neuronal development, but its role in human neurodevelopmental disorders has not been clinically established. By revisiting data from a previously studied Iranian ID cohort, we identified two unrelated families carrying the same rare pathogenic missense variant in FSCN1 (c.665C>A; p.Ala222Asp). Affected individuals exhibited moderate to severe ID with consistent craniofacial features, including a prominent maxilla, long face, broad forehead, and thick lower lip. In silico tools predicted the variant as damaging and destabilizing, and the affected residue is highly conserved. This study provides the first clinical evidence linking FSCN1 to syndromic ID with craniofacial anomalies. The craniofacial features observed in our patients are consistent with experimental evidence from animal models. Together with supportive data from animal models, our findings suggest FSCN1 as a candidate gene for rare or ultra-rare forms of ID and warrant further functional studies to elucidate its precise pathogenic mechanisms.

FSCN1是综合征性智力残疾的候选基因?来自伊朗人群中一种复发性变异的证据。
智力残疾(ID)是一种遗传异质性疾病,许多致病基因尚未确定。FSCN1编码一种对神经元发育至关重要的肌动蛋白捆绑蛋白,但其在人类神经发育障碍中的作用尚未得到临床证实。通过回顾先前研究的伊朗ID队列数据,我们确定了两个不相关的家族携带相同的FSCN1罕见致病性错义变异(c.665C> a; p.Ala222Asp)。受影响的个体表现为中度至重度ID,颅面特征一致,包括突出的上颌骨、长脸、宽额头和厚下唇。在硅工具预测变异是破坏性的和不稳定的,受影响的残基是高度保守的。这项研究提供了第一个临床证据,将FSCN1与颅面异常综合征性ID联系起来。在我们的患者中观察到的颅面特征与动物模型的实验证据一致。结合动物模型的支持性数据,我们的研究结果表明FSCN1是罕见或超罕见形式ID的候选基因,需要进一步的功能研究来阐明其确切的致病机制。
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来源期刊
Clinical Genetics
Clinical Genetics 医学-遗传学
CiteScore
6.50
自引率
0.00%
发文量
175
审稿时长
3-8 weeks
期刊介绍: Clinical Genetics links research to the clinic, translating advances in our understanding of the molecular basis of genetic disease for the practising clinical geneticist. The journal publishes high quality research papers, short reports, reviews and mini-reviews that connect medical genetics research with clinical practice. Topics of particular interest are: • Linking genetic variations to disease • Genome rearrangements and disease • Epigenetics and disease • The translation of genotype to phenotype • Genetics of complex disease • Management/intervention of genetic diseases • Novel therapies for genetic diseases • Developmental biology, as it relates to clinical genetics • Social science research on the psychological and behavioural aspects of living with or being at risk of genetic disease
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