结节性硬化伴或不伴婴儿痉挛表型与基因型的相关性分析

Phenotype and genotype correlation in tuberous sclerosis complex with/without infantile spasms

目的探讨结节性硬化伴或不伴婴儿痉挛表型与基因型的相关性。方法选择临床诊断结节性硬化的15例患儿为研究对象,8例伴婴儿痉挛,7例不伴婴儿痉挛,分析其临床表现、结节性硬化基因突变特征。结果 7例伴婴儿痉挛的结节性硬化患儿存在TSC2基因突变,发现5种新突变位点:c.4305_4306delAG,c.4255_4258delCAGT,c.4734_4735insGGCC,c.4245delG,c.1901_1902insAT;6例不伴婴儿痉挛的结节性硬化患儿也存在TSC2基因突变,包括2种新突变:c.246G>A,c.3691_3694delCTGT;另有1例为TSC1基因突变。结论结节性硬化基因突变类型及位点与结节性硬化伴或不伴婴儿痉挛表型的关系不明确。

Objectives To investigate the characteristics of the clinical phenotype and gene mutations in patients with tuberous sclerosis complex （TSC） with/without infantile spasms （IS）. Methods Fifteen infants with TSC were en- rolled in the study, 8 were with IS and 7 without. Their clinical manifestations and mutations of TSC gene were analyzed. Results A total of 5 novel TSC2 mutations, c.4305 4306delAG, c.4255_4258delCAGT, c.4734_4735insGGCC, c.4245delG, c.1901_1902insAT, were identified in 7 TSC cases with IS. TSC2 mutations were also found in 6 TSC cases without IS, 2 of mutations （c.246G〉A, c.3691 3694delCTGT） were new. Besides, one TSC1 mutation was detected in a TSC infant without IS. Conclusions The correlations between genotype and phenotype in TSC with/without IS are not clear based on this study.