SMC1A基因新生突变致Cornelia de Lange综合征2型2例n

• 作 者: 杨昌键 窦庆阳 袁兴 束晓梅
• 出 处: 中华实用儿科临床杂志
• 发表日期: 2021年10期
• 关键词: Cornelia de Lange综合征 SMC1A基因n 临床特征

分析2019年3月遵义医科大学附属医院收治的Cornelia de Lange综合征(CdLs)患儿2例的临床资料及基因变异结果。2例均在婴儿期起病，表现为难治性癫痫，均伴发育落后及特殊外貌，基因检测显示X染色体上n SMC1A基因突变，例1为c.2561dupA(p.K854fs)移码突变；例2为c.3441+1G>A(exon24)剪接突变，均为新生杂合突变，位点未见文献报道。2例患儿为n SMC1A基因突变所致CdLs，进一步扩大了CdLs的基因型。提示对于早期癫痫起病伴特殊外貌及发育落后的患儿需考虑CdLs的可能，必要时需行基因检测。n “,”The clinical features and gene mutation characteristics of 2 children who suffered from Cornelia de Lange syndrome(CdLs)and were admitted to Affiliated Hospital of Zunyi Medical University in March 2019 were retrospectively analyzed.The 2 cases developed in infancy and presented with intractable epilepsy were accompanied with developmental retardation and special appearance.It was obvious that the 2 children had n SMC1A gene mutations on X chromosome.Case 1 was frameshift mutations in the n SMC1A gene at c. 2561dupA(p.K854fs), and case 2 was mutations in the n SMC1A gene at c. 3441+ 1G>A(exon24)splicing mutation.These were heterozygous de novo mutations, and weren′t detected in their parents, which was not reported in literatures.In this study, 2 cases of CdLs were caused byn SMC1A gene mutation, which enriched the human gene mutation database.CdLs should be considered in children with early-onset epilepsy, especially appearance and developmental retardation.Genetic testing is the most important diagnostic method.n