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与双等位基因变异相关的先天性活动障碍和僵硬。

Congenital immobility and stiffness related to biallelic variants.

作者信息

Bunod Roxane, Doummar Diane, Whalen Sandra, Keren Boris, Chantot-Bastaraud Sandra, Maincent Kim, Villy Marie-Charlotte, Mayer Michèle, Rodriguez Diana, Burglen Lydie, Léger Pierre-Louis, Kieffer François, Martin Isabelle, Héron Delphine, Buratti Julien, Isapof Arnaud, Afenjar Alexandra, Billette de Villemeur Thierry, Mignot Cyril

机构信息

Département de Génétique (R.B., S.W., B.K., S.C.-B., M.-C.V., L.B., D.H., J.B., A.A., C.M.), Hôpital Armand Trousseau & Groupe Hospitalier Pitié-Salpêtrière, and Unité de Neuropédiatrie et Pathologie du Développement (D.D., M.M., D.R., A.I., T.B.V.), Hôpital Armand Trousseau, AP-HP Sorbonne Université, Paris; Centre de Référence des Maladies Neurogénétiques (D.D., D.R.); Centre de Référence Anomalies du Développement et Syndromes Malformatifs (S.W., C.M.); Hôpital de Pédiatrie et de Rééducation (K.M.), Bullion; INSERM UMR 1141 (D.R.), Paris; Réanimation Néonatale et Pédiatrique (P.-L.L.), and Service de Néonatologie (F.K., I.M.), Hôpital Armand Trousseau, AP-HP Sorbonne Université, Paris; Centre de Référence Déficience Intellectuelles de Causes Rares (D.H., A.A., T.B.V., C.M.); and INSERM (C.M.), U 1127, CNRS UMR 7225, Sorbonne Universités, UPMC Université Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle Epinière, Paris, France.

出版信息

Neurol Genet. 2020 Sep 24;6(6):e520. doi: 10.1212/NXG.0000000000000520. eCollection 2020 Dec.

DOI:10.1212/NXG.0000000000000520
PMID:33134516
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7577533/
Abstract

OBJECTIVE

To delineate the phenotype associated with biallelic variants.

METHODS

We describe 2 new patients with -related disorder diagnosed by whole-exome sequencing and compare their phenotype to 6 previous patients.

RESULTS

Patients 1 and 2 had a similar distinctive phenotype comprising congenital stiffness of limbs, absent spontaneous movements, weak sucking, and hypoventilation. Both had absent brainstem evoked auditory responses (BEARs). Patient 1 carried the homozygous p.(His357Argfs*15) variant in . In the light of the finding in patient 1, a second reading of exome data for patient 2 revealed the novel homozygous p.(Gly128Val) variant.

CONCLUSIONS

Analysis of the phenotypes of these 2 patients and of the 6 previous cases showed that biallelic mutations are responsible for a unique congenital encephalopathy likely comprising absent BEAR, different from hyperekplexia and other conditions with neonatal hypertonia.

摘要

目的

描绘与双等位基因变异相关的表型。

方法

我们描述了2例通过全外显子组测序诊断出患有相关疾病的新患者,并将他们的表型与之前的6例患者进行比较。

结果

患者1和患者2具有相似的独特表型,包括肢体先天性僵硬、无自主运动、吸吮无力和通气不足。两人均无脑干听觉诱发电位(BEARs)。患者1在[具体基因名称未给出]中携带纯合的p.(His357Argfs*15)变异。鉴于患者1的这一发现,对患者2的外显子组数据进行二次解读发现了新的纯合p.(Gly128Val)变异。

结论

对这2例患者以及之前6例病例的表型分析表明,双等位基因突变导致了一种独特的先天性脑病,可能表现为无BEAR,不同于惊吓症和其他伴有新生儿肌张力亢进的疾病。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53f5/7577533/5a17f8d11da5/NG2019012930f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53f5/7577533/5a17f8d11da5/NG2019012930f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53f5/7577533/5a17f8d11da5/NG2019012930f1.jpg

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