Microduplication of Xp22.31 and MECP2 Pathogenic Variant in a Girl with Rett Syndrome: A Case Report

Authors

  • Diana Ramirez-Montaño Center for Research on Congenital Anomalies and Rare Diseases (CIACER), Health Sciences Faculty, L Building, Universidad Icesi, Cali, Colombia
  • Estephania Candelo Center for Research on Congenital Anomalies and Rare Diseases (CIACER), Health Sciences Faculty, L Building, Universidad Icesi, Cali, Colombia
  • Harry Pachajoa Center for Research on Congenital Anomalies and Rare Diseases (CIACER), Health Sciences Faculty, L Building, Universidad Icesi, Cali, Colombia; and Department of Genetics, Fundación Valle del Lili, Cali, Colombia
Abstract:

Rett syndrome (RS) is a neurodevelopmental infantile disease characterized by an early normal psychomotor development followed by a regression in the acquisition of normal developmental stages. In the majority of cases, it leads to a sporadic mutation in the MECP2 gene, which is located on the X chromosome. However, this syndrome has also been associated with microdeletions, gene translocations, and other gene mutations.A 12-year-old female Colombian patient was presented with refractory epilepsy and regression in skill acquisition (especially language with motor and verbal stereotypies, hyperactivity, and autistic spectrum disorder criteria). The patient was born to non-consanguineous parents and had an early normal development until the age of 36 months. Comparative genomic hybridization array-CGH (750K) was performed and Xp22.31 duplication was detected (6866889-8115153) with a size of 1.248 Mb associated with developmental delay, epilepsy, and autistic traits. Given the clinical criteria of RS, MECP2 sequencing was performed which showed a de novo pathogenic variant c.338C>G (p.Pro113Arg).The features of RS include intellectual disability, developmental delay, and autism. These features are associated with copy number variations (CNVs) on the X chromosome (Xp22.31 microduplication). Here we present the first reported case of simultaneous CNV and MECP2 pathogenic mutation in a patient with RS. We propose that both DNA alterations might have a synergistic effect and could lead to variable expressivity of the phenotype.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

A case report of variant scimitar syndrome

Background: Scimitar syndrome (SS) or congenital pulmonary venolobar syndrome is a rare anomaly, most commonly including partial pulmonary venous drainage into the inferior vena cava, right lung hypoplasia, dextroposition of the heart, and anomalous systemic arterial supply from aorta or one of its branches to the right lung. Case report: A 10-day-old female infant was referred to our hospital...

full text

Simultaneous Occurrence of Turner Syndrome and Robertsonian Translocation in a Girl with Short Stature: A Case Report

Short stature is an important clinical feature of Turner syndrome (TS). In this report, a girl with short stature suspected to have Turner syndrome underwent cytogenetic analysis, which confirmd Turner syndrome by observing sex chromosomal monosomy using the karyotype test. In addition to Turner syndrome, Robertsonian (ROB) translocation t(13;14) was detected. As recommended by a genetic counse...

full text

Homozygosity for MECP2 gene in a girl with classical Rett syndrome.

We report a 21 year-old girl with classical Rett syndrome (RS) based on clinical diagnosis. The molecular testing of MECP2 gene revealed that the patient is homozygous for a de novo 473C > T mutation, causing the T158M amino acid change. Chromosome analysis showed a normal karyotype, and the haplotype analysis ruled out the possibility of parental disomy or microdeletion in MECP2 gene. Cultured...

full text

a comparison of linguistic and pragmatic knowledge: a case of iranian learners of english

در این تحقیق دانش زبانشناسی و کاربردشناسی زبان آموزان ایرانی در سطح بالای متوسط مقایسه شد. 50 دانش آموز با سابقه آموزشی مشابه از شش آموزشگاه زبان مختلف در دو آزمون دانش زبانشناسی و آزمون دانش گفتار شناسی زبان انگلیسی شرکت کردند که سوالات هر دو تست توسط محقق تهیه شده بود. همچنین در این تحقیق کارایی کتابهای آموزشی زبان در فراهم آوردن درون داد کافی برای زبان آموزان ایرانی به عنوان هدف جانبی تحقیق ...

15 صفحه اول

Congenital variant Rett syndrome in a girl with terminal deletion of chromosome 3p.

A girl fulfilling four/five of six inclusion criteria and eight/nine of 11 supportive criteria for atypical Rett syndrome had a cytogenetic deletion of chromosome 3p, del(3)(pter-->3p25.1 approximately 25.2). The deletion was situated on the maternally derived chromosome and by molecular analysis the deletion breakpoint was shown to be between DNA markers D3S3589 and D3S1263.

full text

PHACES syndrome with cataract and Horner’s syndrome: a case report

PHACES syndrome (Posterior Fossa Malformations, Hemangioma, Arterial Anomalies, Cardiac Defects and Coarctation of the Aorta, Eye Abnormalities, and Sternal Abnormalities or Ventral Developmental Defects) is a rare neurocutaneous syndrome, which characteristic feature is large segmental hemangioma. Extracutaneous involvement is an important cause of morbidity in this syndrome.<br /...

full text

My Resources

Save resource for easier access later

Save to my library Already added to my library

{@ msg_add @}


Journal title

volume 44  issue 4

pages  347- 353

publication date 2019-07-01

By following a journal you will be notified via email when a new issue of this journal is published.

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023