First nonsense variant of MED12 gene in a female with complete Maat-Kievit-Brunner phenotype of Ohdo syndrome: A case report

IF 1 Q4 GENETICS & HEREDITY

Gene Reports Pub Date : 2024-08-02 DOI:10.1016/j.genrep.2024.102005

N. Amllal , J. Lyahyai , S.C. Elalaoui , A. Sefiani , I. Ratbi

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引用次数: 0

Abstract

Background

Ohdo syndrome (OMIM≠ 249,620) is a clinically heterogeneous group of genetic disorders mainly characterized by intellectual disability, blepharophimosis and specific facial features. It comprises five distinct subtypes, each exhibiting unique clinical characteristics. Herein, we report a novel case of the Maat-Kievit-Brunner (OSMKB; X-linked recessive) subtype caused by a novel pathogenic MED12 nonsense variant, classically associated with missense variants of the MED12 gene (Xq13.1). Moreover, we conduct a comparative analysis of reported MED12 pathogenic variants in the literature.

Case presentation

Our patient is a five-year-old girl demonstrating a complete OSMKB phenotype. She exhibits all the characteristic features associated to this latter including intellectual disability, developmental delay, indicative dysmorphia featured by blepharophemosis and a triangular face, and hypotonia.

Conclusions

clinical and molecular data of this rare case expands the clinical and genetic landscapes of MED12 gene which is considered important for establishing strong genotype-phenotype correlations as much as for genetic counselling.

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一名女性患者的 MED12 基因首次出现无义变异，并伴有完全的 Maat-Kievit-Brunner 表型（Ohdo 综合征）：病例报告

背景奥多综合征（OMIM≠249,620）是一组临床异质性遗传疾病，主要特征是智力障碍、睑外翻和特殊面部特征。它包括五个不同的亚型，每个亚型都表现出独特的临床特征。在此，我们报告了一例由新型致病性 MED12 无义变体引起的 Maat-Kievit-Brunner（OSMKB；X 连锁隐性）亚型病例，该变体通常与 MED12 基因（Xq13.1）的错义变体有关。此外，我们还对文献中报道的 MED12 致病变体进行了比较分析。这一罕见病例的临床和分子数据扩展了 MED12 基因的临床和遗传图谱，这对于建立基因型与表型之间的密切关联以及遗传咨询都非常重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Gene Reports Biochemistry, Genetics and Molecular Biology-Genetics

CiteScore

3.30

自引率

7.70%

发文量

246

审稿时长

49 days

期刊介绍： Gene Reports publishes papers that focus on the regulation, expression, function and evolution of genes in all biological contexts, including all prokaryotic and eukaryotic organisms, as well as viruses. Gene Reports strives to be a very diverse journal and topics in all fields will be considered for publication. Although not limited to the following, some general topics include: DNA Organization, Replication & Evolution -Focus on genomic DNA (chromosomal organization, comparative genomics, DNA replication, DNA repair, mobile DNA, mitochondrial DNA, chloroplast DNA). Expression & Function - Focus on functional RNAs (microRNAs, tRNAs, rRNAs, mRNA splicing, alternative polyadenylation) Regulation - Focus on processes that mediate gene-read out (epigenetics, chromatin, histone code, transcription, translation, protein degradation). Cell Signaling - Focus on mechanisms that control information flow into the nucleus to control gene expression (kinase and phosphatase pathways controlled by extra-cellular ligands, Wnt, Notch, TGFbeta/BMPs, FGFs, IGFs etc.) Profiling of gene expression and genetic variation - Focus on high throughput approaches (e.g., DeepSeq, ChIP-Seq, Affymetrix microarrays, proteomics) that define gene regulatory circuitry, molecular pathways and protein/protein networks. Genetics - Focus on development in model organisms (e.g., mouse, frog, fruit fly, worm), human genetic variation, population genetics, as well as agricultural and veterinary genetics. Molecular Pathology & Regenerative Medicine - Focus on the deregulation of molecular processes in human diseases and mechanisms supporting regeneration of tissues through pluripotent or multipotent stem cells.