3例Sotos综合征的基因型与临床表现分析
网络出版日期: 2016-08-31
基金资助
国家自然科学基金(81570516,81270936);上海市教育委员会高峰高原学科建设计划(20152520)
Analysis of genotypes and clinical manifestations of three cases of Sotos syndrome
Online published: 2016-08-31
Supported by
National Natural Science Foundation of China, 81570516, 81270936; Shanghai Municipal Education Commission—Gaofeng Clinical Medicine Grant Support, 20152520
目的·探讨Sotos综合征的临床特征与遗传特征,提高对中国人群Sotos综合征的认识。方法·对3例Sotos综合征患儿的临床特征和基因测序结果进行回顾性分析。结果·3例患儿均是男性,来自无关家庭,6~11月龄。3例患儿均以“智力落后”为首发症状。其中2例患儿表现为特殊面容,包括巨颅、额头突起、眼裂下斜、尖下颌、高腭弓、双颞部毛发退化;1例患儿无特殊面容。基因测序检测到3例患儿均携带一个NSD1基因杂合致病性突变,但突变位点不同。其中c.4118_4119insTGACCTT(p.L1373F fs*18)为新发现的突变,c.5885T>C(p.Ile1962Thr)和c.5990A>G(p.Tyr1997Cys)在文献中已有报道。3例患儿均确诊为Sotos综合征。结论·Sotos综合征的典型症状有助于诊断该病,DNA测序分析等基因诊断可确诊该病。Sotos综合征的表现型与基因型具有相关性。
康路路 刘晓青 张惠文 邱文娟 孙昱 顾学范 . 3例Sotos综合征的基因型与临床表现分析[J]. 上海交通大学学报(医学版), 2016 , 36(8) : 1165 . DOI: 10.3969/j.issn.1674-8115.2016.08.011
Objective · To investigate the clinical and genetic characteristics of Sotos syndrome and improve the awareness of this disorder among Chinese population. Methods · Clinical characteristics and gene sequencing results of three sporadic cases of Sotos syndrome were retrospectively reviewed. Results · Three male pediatric patients aged from 6 to 11 months were from unrelated families. The first symptom of all three patients was mental retardation. Two of them showed characterized facial appearance, including macrocephaly, broad forehead, down-slanting palpebral fissures, pointed chin, high palate, and bitemporal hair sparsity. One patient had normal facial appearance. Gene sequencing found that all patients carried a heterozygous pathogenic mutation in NSD1 gene with different mutation sites. The c.4118_4119insTGACCTT (L1373F fs*18) was a novel mutation, while c.5885T>C (p.Ile1962Thr) and c.5990A>G (p.Tyr1997Cys) had been reported. The Sotos syndrome was confirmed in 3 patients. Conclusion · Typical symptoms can help diagnose the Sotos syndrome and genetic diagnoses such as DNA sequencing can confirm this disease. Genotypes are associated with phenotypes in Satos syndrome.
Key words: Sotos syndrome; NSD1 gene; genotype
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