Rapid genome sequencing identifies a novel de novo SNAP25 variant for neonatal congenital myasthenic syndrome.

Rapid genome sequencing identifies a novel de novo SNAP25 variant for neonatal congenital myasthenic syndrome.
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DOI:
10.1101/mcs.a006242
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发表时间:
2022-12
影响因子:
1.8
通讯作者:
Jenkins, Sabrina Malone
Jenkins, Sabrina Malone
中科院分区:
其他
文献类型:
--
作者:
Reynolds, Hayley M.;Wen, Ting;Farrell, Andrew;Mao, Rong;Moore, Barry;Boyden, Steven E.;Bayrak-Toydemir, Pinar;Nicholas, Thomas J.;Rynearson, Shawn;Holt, Carson;Miller, Christine;Noble, Katherine;Bentley, Dawn;Palmquist, Rachel;Ostrander, Betsy;Manberg, Stephanie;Bonkowsky, Joshua L.;Shayota, Brian J.;Jenkins, Sabrina Malone

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先天性肌无力综合征(CMS)是一组32种疾病,涉及神经肌肉接头处的遗传功能障碍,导致骨骼肌无力,并伴有体力活动。精确的诊断和分子亚型鉴定对于治疗是至关重要的,因为一种亚型的药物可能会加重另一种亚型的疾病(Engel et al.,Lancet Neurol 14:420 [2015]; Finsterer,Orphanet J Rare Dis 14:57 [2019]; Prior和Ghosh,J Child Neurol 36:610 [2021])。SNAP 25相关的CMS亚型(先天性肌无力综合征18,CMS 18; MIM #616330)是一种罕见的疾病,其特征在于肌肉疲劳,延迟的精神发育和共济失调。在此,我们对一名重症新生儿进行了快速全基因组测序(rWGS),发现了一种未报告的致病性从头SNAP 25 c.529C > T; p.Gln177Ter变体。在这份报告中,我们提出了一个新的情况下CMS 18复杂的新生儿后果。这一发现为CMS 18的表型严重程度提供了独特的见解,扩展了报道的SNAP 25变体表型,并为CMS 18的个性化管理奠定了基础。
Congenital myasthenic syndrome (CMS) is a group of 32 disorders involving genetic dysfunction at the neuromuscular junction resulting in skeletal muscle weakness that worsens with physical activity. Precise diagnosis and molecular subtype identification are critical for treatment as medication for one subtype may exacerbate disease in another (Engel et al., Lancet Neurol 14: 420 [2015]; Finsterer, Orphanet J Rare Dis 14: 57 [2019]; Prior and Ghosh, J Child Neurol 36: 610 [2021]). The SNAP25-related CMS subtype (congenital myasthenic syndrome 18, CMS18; MIM #616330) is a rare disorder characterized by muscle fatigability, delayed psychomotor development, and ataxia. Herein, we performed rapid whole-genome sequencing (rWGS) on a critically ill newborn leading to the discovery of an unreported pathogenic de novo SNAP25 c.529C > T; p.Gln177Ter variant. In this report, we present a novel case of CMS18 with complex neonatal consequence. This discovery offers unique insight into the extent of phenotypic severity in CMS18, expands the reported SNAP25 variant phenotype, and paves a foundation for personalized management for CMS18.
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