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转变生长因子,β-2基因突变导致自体主导的卡穆拉蒂-恩格尔曼病,类型2 (OMIM % 606631)

Steven Mumm¹, José L Paz-Ibarra², Philippe M Campeau³

¹Division of Bone and Mineral Diseases, Department of Internal Medicine, Washington University School of Medicine, St Louis, MO 63110, USA; Center for Metabolic Bone Disease and Molecular Research, Shriners Hospitals for Children-St. Louis, St. Louis, MO 63110, USA.

|April 9, 2025

概括

卡穆拉蒂-恩格尔曼病2型 (CED2) 是一种罕见的骨发育不良. 在一家秘鲁人中发现了一种导致CED2的新型TGFB2基因突变,呈现为痛苦的超静止症.

科学领域:

遗传学是一个遗传学.
骨发育不良症骨发育不良症
分子生物学分子生物学

背景情况:

卡穆拉蒂-恩格尔曼病1型 (CED1) 是一种由TGFB1突变引起的自体主导骨发育不良.
由于负TGFB1分析,人们怀疑CED的遗传异质性,导致CED2.2的指定.
以前的报道表明,TGFB2突变在零星的CED2病例中发生.

研究的目的:

在一个秘鲁家庭中调查卡穆拉蒂-恩格尔曼病2型 (CED2) 的遗传基础.
识别和描述与CED2表型相关的新型遗传变异.

主要方法:

整体外体序列或TGFB2.2的向基因序列.
在受影响的家庭内进行隔离分析.
对已识别的变种进行生物信息分析 (例如,Polyphen-2,SIFT,gnomAD).
使用ACMG指南评估变种病原性.

主要成果:

在一个患有CED2.2的秘鲁家庭中,在TGFB2延迟相关 (LAP) 域中发现了一种新的误解变异 (c.108G>T,p.R36S).
这种变异在三代中与自体主导的CED2表型共分离.
已识别的TGFB2变种位于保存域中,在gnomAD中不存在,预计具有破坏性,并且与已知的致病变种相同.

结论:

新型TGFB2变种 (p.R36S) 很可能是致病性,并导致CED2.2.
这一发现扩大了卡穆拉蒂-恩格尔曼病的遗传谱.
氨基双酸盐治疗可能有助于控制CED2症状.

关键词:

氨基双酸氨基双酸骨形态遗传蛋白质是一种骨形态遗传蛋白质.听力障碍听力障碍是什么?过度静止症 (hyperostosis) 是一种过度静止症.与延迟相关的类.洛伊斯 - 迪茨综合征 (Loeys-Dietz综合征) 是一种代谢性骨病是一种代谢性骨病.骨质母细胞的骨质细胞.骨质结晶体骨质结晶体是一个骨质硬化症骨质硬化症渐进性隔膜细胞失生症有关肋骨病的疾病.斯马德 (SMAD) 公司骨发育不良症骨发育不良症在TGFB1中.这是TGFB2的TGFB2.转化增长因子β的转化增长因子β.

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