scholarly journals 11p11.12p12 duplication in a family with intellectual disability and craniofacial anomalies

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Xuejiao Chen ◽  
Huihui Xu ◽  
Weiwu Shi ◽  
Feng Wang ◽  
Fenfen Xu ◽  
...  
Keyword(s):  
Intellectual Disability ◽  
Chromosomal Region ◽  
Clinical Phenotype ◽  
Deletion Syndrome ◽  
Potential Candidate ◽  
Sequencing Analysis ◽  
Craniofacial Anomalies ◽  
Biochemical Tests ◽  
Clinical Phenotypes ◽  
Duplication Syndrome

Abstract Background Potocki–Shaffer syndrome (PSS) is a rare contiguous gene deletion syndrome marked by haploinsufficiency of genes in chromosomal region 11p11.2p12. Approximately 50 cases of PSS have been reported; however, a syndrome with a PSS-like clinical phenotype caused by 11p11.12p12 duplication has not yet been reported. Methods 11p11.12p12 duplication syndrome was identified and evaluated using a multidisciplinary protocol. Diagnostic studies included intelligence testing, thorough physical examination, electroencephalography (EEG), magnetic resonance imaging (MRI) of the brain, ultrasonography, biochemical tests and karyotype analysis. Next-generation sequencing analysis clarified the location of the chromosomal variations, which was confirmed by chromosome microarray analysis (CMA). Whole-exome sequencing (WES) was performed to exclude single nucleotide variations (SNVs). A wider literature search was performed to evaluate the correlation between the genes contained in the chromosomal region and clinical phenotypes. Results The proband was a 36-year-old mother with intellectual disability (ID) and craniofacial anomalies (CFA). She and her older son, who had a similar clinical phenotype, both carried the same 11p11.12p12 duplication with a copy number increase of approximately 10.5 Mb (chr11:40231033_50762504, GRCh37/hg19) in chromosome bands 11p11.12p12. In addition, she gave birth to a child with a normal phenotype who did not carry the 11p11.12p12 duplication. By literature research and DECIPHER, we identified some shared and some distinct features between this duplication syndrome and PSS. One or more of ALX4, SLC35C1, PHF21A and MAPK8IP1 may be responsible for 11p11.12p12 duplication syndrome. Conclusions We present the first report of 11p11.12p12 duplication syndrome. It is an interesting case worth reporting. The identification of clinical phenotypes will facilitate genetic counselling. A molecular cytogenetic approach was helpful in identifying the genetic aetiology of the patients and potential candidate genes with triplosensitive effects involved in 11p11.12p12 duplication.

scholarly journals Clinical characteristics of Polish patients with molecularly confirmed Mowat-Wilson syndrome

2021 ◽  
Author(s):  
Aleksandra Jakubiak ◽  
Krzysztof Szczałuba ◽  
Magdalena Badura-Stronka ◽  
Anna Kutkowska-Kaźmierczak ◽  
Anna Jakubiuk-Tomaszuk ◽  
...  
Keyword(s):  
Intellectual Disability ◽  
Congenital Anomalies ◽  
Chromosomal Region ◽  
Neurodevelopmental Disorder ◽  
Hirschsprung Disease ◽  
Psychomotor Retardation ◽  
Facial Features ◽  
Dysmorphic Features ◽  
Pathogenic Variants ◽  
Intragenic Deletions

AbstractMowat-Wilson syndrome is a rare neurodevelopmental disorder caused by pathogenic variants in the ZEB2 gene, intragenic deletions of the ZEB2 gene, and microdeletions in the critical chromosomal region 2q22-23, where the ZEB2 gene is located. Mowat-Wilson syndrome is characterized by typical facial features that change with the age, severe developmental delay with intellectual disability, and multiple congenital abnormalities. The authors describe the clinical and genetic aspects of 28th patients with Mowat-Wilson syndrome diagnosed in Poland. Characteristic dysmorphic features, psychomotor retardation, intellectual disability, and congenital anomalies were present in all cases. The incidence of most common congenital anomalies (heart defect, Hirschsprung disease, brain defects) was similar to presented in literature. Epilepsy was less common compared to previously reported cases. Although the spectrum of disorders in patients with Mowat-Wilson syndrome is wide, knowledge of characteristic dysmorphic features awareness of accompanying abnormalities, especially intellectual disability, improves detection of the syndrome.

scholarly journals Episodic Behavioural Regression in an 8-Year-Old Female: Sequelae of 22q11.2 Duplication Syndrome

2018 ◽  
Vol 2018 ◽  
pp. 1-3
Author(s):  
A. Bahji ◽  
S. Khalid-Khan
Keyword(s):  
Case Reports ◽  
22Q11.2 Deletion Syndrome ◽  
Autism Spectrum ◽  
Deletion Syndrome ◽  
Medical Illness ◽  
22Q11.2 Deletion ◽  
Genetic Syndrome ◽  
Potential Risk Factors ◽  
22Q11.2 Duplication Syndrome ◽  
Duplication Syndrome

22q11.2 duplication syndrome is a recently discovered genetic syndrome with unclear neuropsychiatric sequelae. While its connection to 22q11.2 deletion syndrome is actively investigated, case reports on the neuropsychiatric sequelae of affected individuals have been previously described, largely focusing on comorbid autism spectrum disorder. Here, we present the case of an 8-year-old female experiencing episodes of severe behavioural regression following medical illness. We analyze the case and relate it to the available literature and identify potential risk factors.

scholarly journals Novel compound heterozygous mutations in WDR62 gene leading to developmental delay and Primary Microcephaly in Saudi Family

2019 ◽  
Vol 35 (3) ◽  
Author(s):  
Muhammad Imran Naseer ◽  
Mahmood Rasool ◽  
Angham Abdulrahman Abdulkareem ◽  
Adeel G. Chaudhary ◽  
Syed Kashif Zaidi ◽  
...  
Keyword(s):  
Intellectual Disability ◽  
Developmental Delay ◽  
Genetic Defect ◽  
Compound Heterozygous ◽  
Sequencing Analysis ◽  
The Novel ◽  
Primary Microcephaly ◽  
Saudi Family ◽  
Exon 9 ◽  
Compound Heterozygous Mutations

Objective: Primary microcephaly (MCPH) is a rare autosomal recessive disorder characterized by impaired congenital reduction of brain size along with head circumference and intellectual disability. MCPH is a heterogeneous disorder and more than twenty four genes associated with this disease have been identified so far. The objective of this study was to find out the novel genes or mutations leading to the genetic defect in a Saudi family with primary microcephaly. Methods: Whole exome sequencing was carried out to find the novel mutation and the results was further validated using Sanger sequencing analysis. This study was done in the Center of excellence in Genomic Medicine and Research, King Abdulaziz University under KACST project during 2017 and 2018. Results: We report a novel compound heterozygous mutations c.797C>T in exon 7 and c.1102G>A in exon 9 of the WD repeat domain 62 (WDR62) (OMIM 604317) gene in two affected siblings in Saudi family with intellectual disability, speech impediments walking difficulty along with primary microcephaly. Two rare, missense variants were detected in heterozygous state in the WDR62 gene in these two affected individuals from the heterozygous parents. Conclusions: A compound heterozygous mutations c.797C>T in exon 7 and c.1102G> A in exon 9 of the WDR62 gene was identified. WDR62 gene is very important gene and mutation can lead to neuro developmental defects, brain malformations, reduced brain and head size. These results should be taken into consideration during prognostic discussions and mutation spectrum with affected patients and their families in the Saudi population. doi: https://doi.org/10.12669/pjms.35.3.36 How to cite this:Naseer MI, Rasool M, Abdulkareem AA, Chaudhary AG, Zaidi SK, Al-Qahtani MH. Novel compound heterozygous mutations in WDR62 gene leading to developmental delay and Primary Microcephaly in Saudi Family. Pak J Med Sci. 2019;35(3):---------.  doi: https://doi.org/10.12669/pjms.35.3.36 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

A case of Luscan-Lumish syndrome: Possible involvement of enhanced GH signaling

2020 ◽  
Author(s):  
Kentaro Suda ◽  
Hidenori Fukuoka ◽  
Genzo Iguchi ◽  
Keitaro Kanie ◽  
Yasunori Fujita ◽  
...  
Keyword(s):  
Intellectual Disability ◽  
De Novo ◽  
Novel Mutation ◽  
Body Height ◽  
Chiari I Malformation ◽  
Oral Glucose ◽  
Tall Stature ◽  
Sequencing Analysis ◽  
Serum Growth Hormone ◽  
Chiari I

Abstract Context Luscan-Lumish syndrome (LLS) is characterized by postnatal overgrowth, obesity, Chiari I malformation, seizures, and intellectual disability. SET domain-containing protein 2 (SETD2) is a histone methyltransferase, where mutations in the gene are associated with the development of LLS. However, mechanisms underlying LLS remain unclear. Case description A 20-year-old man was referred to our hospital because of tall stature. His body height was 188.2 cm (+3.18 SD) and he showed obesity with a body mass index of 28.4 kg/m 2. He exhibited acral overgrowth, jaw malocclusion, and prognathism, but no history of seizures, intellectual disability, or speech delay. Serum growth hormone (GH), insulin-like growth factor 1 (IGF-1), and nadir GH levels after administration of 75 g oral glucose were within normal range. Pituitary magnetic resonance imaging showed no pituitary adenoma, but Chiari I malformation. Whole exome sequencing analysis of the proband revealed a de novo heterozygous germline mutation in SETD2 (c.236T>A, p.L79H). Skin fibroblasts derived from the patient grew faster than those from his father and the control subject. In addition, these cells showed enhanced tyrosine phosphorylation and transcriptional activity of signal transducer and activator of transcription 5b (STAT5b) and increased IGF-1 expression induced by GH. Conclusion This is a mild case of LLS with a novel mutation in SETD2 without neurological symptoms. LLS should be differentiated in a patient with gigantism without pituitary tumors. Although further investigation is necessary, this is the first study to suggest the involvement of aberrant GH signaling in the development of LLS.

scholarly journals Comparative characterization of PCDH19 missense and truncating variants in PCDH19-related epilepsy

2020 ◽  
Author(s):  
Mami Shibata ◽  
Atsushi Ishii ◽  
Ayako Goto ◽  
Shinichi Hirose
Keyword(s):  
Distribution Function ◽  
Intellectual Disability ◽  
Cumulative Distribution Function ◽  
Clinical Phenotype ◽  
Cytoplasmic Domain ◽  
Cumulative Distribution ◽  
Clinical Implications ◽  
Healthy Individuals ◽  
Conserved Domains

AbstractMissense and truncating variants in protocadherin 19 (PCDH19) cause PCDH19-related epilepsy. In this study, we aimed to investigate variations in distributional characteristics and the clinical implications of variant type in PCDH19-related epilepsy. We comprehensively collected PCDH19 missense and truncating variants from the literature and by sequencing six exons and intron–exon boundaries of PCDH19 in our cohort. We investigated the distribution of each type of variant using the cumulative distribution function and tested for associations between variant types and phenotypes. The distribution of missense variants in patients was clearly different from that of healthy individuals and was uniform throughout the extracellular cadherin (EC) domain, which consisted of six highly conserved domains. Truncating variants showed two types of distributions: (1) located from EC domain 1 to EC domain 4, and (2) located from EC domain 5 to the cytoplasmic domain. Furthermore, we also found that later onset seizures and milder intellectual disability occurred in patients with truncating variants located from EC domain 5 to the cytoplasmic domain compared with those of patients with other variants. Our findings provide the first evidence of two types of truncating variants in the PCDH19 gene with regard to distribution and the resulting clinical phenotype.

scholarly journals A Novel ELP2 Compound Heterozygous Mutation in a Boy with Severe Intellectual Disability, Spastic Diplegia, Stereotypic Behavior and Review of the Current Literature

2020 ◽  
Vol 11 (5-6) ◽  
pp. 315-319
Author(s):  
Ayberk Turkyilmaz ◽  
Gunes Sager
Keyword(s):  
Intellectual Disability ◽  
Current Literature ◽  
Stereotypic Behavior ◽  
Compound Heterozygous Mutation ◽  
Heterozygous Mutation ◽  
Spastic Diplegia ◽  
Compound Heterozygous ◽  
Sequencing Analysis ◽  
Severe Intellectual Disability ◽  
Elongator Complex

The elongator complex consists of 6 highly conserved subunit proteins and is indispensable for various cellular functions, such as transcription elongation, histone acetylation, and tRNA modification. The elongator complex contains 2 subunits, each of which consists of 3 different proteins (encoded by the <i>ELP1–3</i> and <i>ELP4–6</i> genes). According to the OMIM database, <i>ELP2</i> gene variations have been reported to be associated with autosomal recessive mental retardation type 58. Here, we report a male patient with severe intellectual disability, spastic diplegia, and stereotypic behavior; in addition, we also provide a review of the current literature. Using whole-exome sequencing analysis, we detected a novel compound heterozygous variation in the <i>ELP2</i> gene. We present this case report to clarify the clinical findings of a very rare neurodevelopmental phenotype and to contribute new information to the current literature on genotype-phenotype correlations.

Deletion of chromosomal region Xq28 cause of Hunter syndrome in a patient with mild clinical phenotype

2019 ◽  
Vol 126 (2) ◽  
pp. S156
Author(s):  
Natalia V. Zhurkova ◽  
Kirill Victorovich Savostyanov ◽  
Alexandr Andreevich Pushkov ◽  
Tatiana Vladimirovna Podkletnova ◽  
Nato Dzhumberovna Vashakmadze ◽  
...  
Keyword(s):  
Chromosomal Region ◽  
Clinical Phenotype ◽  
Hunter Syndrome ◽  
Mild Clinical Phenotype

Feeding and Swallowing Issues in Infants With Craniofacial Anomalies

2016 ◽  
Vol 1 (5) ◽  
pp. 13-26 ◽  
Author(s):  
Claire Kane Miller ◽  
Lauren L. Madhoun
Keyword(s):  
Clinical Signs ◽  
Oral Feeding ◽  
Deletion Syndrome ◽  
Feeding Strategies ◽  
Primary Role ◽  
Craniofacial Anomalies ◽  
Airway Protection ◽  
Feeding Difficulties ◽  
Oral Motor ◽  
Swallowing Dysfunction

The problems with feeding and swallowing that occur as a result of clefts and craniofacial anomalies range in severity. The extent of clefting, as well as other structural, airway, and neurologic issues, are factors that contribute to potential difficulty with oral feeding mechanics and with the integrity of airway protection during swallowing. Oral motor dysfunction in conjunction with obstruction in the upper airway secondary to anatomic or physiologic anomalies has the potential to cause serious disruption to the necessary coordination of respiration and swallowing. Timely identification of problems is necessary to address threats to nutritional status and/or respiratory health. The pediatric speech-language pathologist has a primary role in the clinical assessment of oral motor/feeding skills, and in the recognition of clinical signs and symptoms of swallowing dysfunction that may warrant referral for instrumental assessment of swallowing function and airway protection. The objective of this article is to summarize the potential feeding difficulties and feeding strategy options for patients with Craniofacial Microsomia, 22q11.2 Deletion Syndrome, Treacher Collins Syndrome, and Pierre Robin Sequence. Awareness of the factors that impact upon the success of feeding and the efficacy of compensatory feeding strategies is key to best practice and successful patient outcomes.

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