Novel CYFIP2 Frameshift Variant Linked to Dyskinetic Crises: Functional Studies Show Impaired Cell Motility.

IF 2.3 3区 医学 Q2 GENETICS & HEREDITY
María Eugenia Amato, Marcos Frías, Alfredo Cerisola, Mònica Roldán, Juan Darío Ortigoza-Escobar
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引用次数: 0

Abstract

CYFIP2, essential for actin cytoskeleton regulation, is implicated in early-onset developmental and epileptic encephalopathy (DEE) with neurodevelopmental impairments and variable movement disorders, including occasional dyskinetic crises. We report a novel CYFIP2 frameshift variant (c.281_282insA/p.(Gln95ProfsTer15)) causing dyskinetic crises and to assess its functional impact. Clinical and genetic evaluations were conducted, alongside functional studies using patient-derived fibroblasts. Actin dynamics and cell motility were analyzed with confocal microscopy and live-cell imaging. The patient exhibited DEE, delayed neurodevelopment, refractory seizures, and movement disorders, including dystonia, choreoathetosis, and dyskinetic crises. Functional studies revealed disrupted actin organization, impaired cell motility, and altered protrusive structures. This study confirms CYFIP2 as a cause of dyskinetic crises and underscores its role in cellular dynamics, broadening the phenotypic spectrum of CYFIP2-related disorders. Early genetic diagnosis and further research are essential to developing targeted therapeutic strategies.

新的CYFIP2移码变体与运动障碍危机相关:功能研究显示细胞运动受损。
CYFIP2对肌动蛋白细胞骨架调节至关重要,与早发性发育性和癫痫性脑病(DEE)有关,伴神经发育障碍和可变运动障碍,包括偶尔的运动障碍危象。我们报告了一种新的CYFIP2移码变体(c.281_282insA/p.(Gln95ProfsTer15))引起运动障碍危机,并评估其功能影响。进行了临床和遗传评估,并使用患者来源的成纤维细胞进行了功能研究。用共聚焦显微镜和活细胞成像分析肌动蛋白动力学和细胞运动。患者表现为DEE、神经发育迟缓、难治性癫痫发作和运动障碍,包括肌张力障碍、舞蹈症和运动障碍危象。功能研究显示肌动蛋白组织被破坏,细胞运动受损,突起结构改变。这项研究证实了CYFIP2是运动障碍危机的一个原因,并强调了它在细胞动力学中的作用,拓宽了CYFIP2相关疾病的表型谱。早期基因诊断和进一步研究对于制定有针对性的治疗策略至关重要。
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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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