scholarly journals Whole Exome Sequencing to Identify Genetic Causes of Short Stature

2014 ◽  
Vol 82 (1) ◽  
pp. 44-52 ◽  
Author(s):  
Michael H. Guo ◽  
Yiping Shen ◽  
Emily C. Walvoord ◽  
Timothy C. Miller ◽  
Jennifer E. Moon ◽  
...  
Keyword(s):  
Short Stature ◽  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Genetic Causes ◽  
Whole Exome

scholarly journals Diagnostic Whole Exome Sequencing in Patients with Short Stature

2018 ◽  
Author(s):  
Huijuan Zhu ◽  
Ziying Yang ◽  
Jun Sun ◽  
Wei Li ◽  
Hongbo Yang ◽  
...  
Keyword(s):  
Short Stature ◽  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Clinical Utility ◽  
Molecular Diagnostic ◽  
Unknown Etiology ◽  
Growth Disorders ◽  
Pediatric Endocrinology ◽  
Genetic Causes ◽  
Whole Exome

AbstractShort stature is among the most common reasons for children being referred to the pediatric endocrinology clinics. The cause of short stature is broad, in which genetic factors play a substantial role, especially in primary growth disorders. However, identifying the molecular causes for short stature remains as a challenge because of the high heterogeneity of the phenotypes. Here, whole exome sequencing (WES) was used to identify the genetic causes of short stature with unknown etiology for 20 patients aged from 1 to 16 years old. The genetic causes of short stature were identified in 9 of the 20 patients, corresponding to a molecular diagnostic rate of 45%. Notably, in 2 of the 9 patients identified with genetic causes, the diagnosed diseases based on WES are different from the original clinical diagnosis. Our results highlight the clinical utility of WES in the diagnosis of rare, high heterogeneity disorders.

scholarly journals Whole-Exome Sequencing in Idiopathic Short Stature: Rare Mutations Affecting Growth

2020 ◽  
Author(s):  
Shahab Noorian ◽  
Nami Mohammadian Khonsari ◽  
Shahram Savad ◽  
Benyamin Hakak-Zargar ◽  
Tessa Voth ◽  
...  
Keyword(s):  
Short Stature ◽  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Treatment Options ◽  
Idiopathic Short Stature ◽  
Genetic Causes ◽  
Rare Mutations ◽  
Whole Exome ◽  
Common Diagnosis

AbstractIdiopathic short stature (ISS) is a common diagnosis of exclusion in patients with short stature (SS). We aimed to identify the genetic causes of SS in patients with ISS and investigate treatment options. Fourteen children with diagnosis of ISS were identified, and whole-exome sequencing (WES) was subsequently conducted on blood-derived DNA. Five patients were correctly diagnosed with ISS and four had rare mutations that have not been previously reported. Four patients had mutations known to cause SS and one had a mutation that was known not to affect height. WES can help identify rare mutations implicated in ISS.

scholarly journals Genetic causes of cardiomyopathies identified by Whole Exome Sequencing

2013 ◽  
Vol 34 (suppl 1) ◽  
pp. 2605-2605
Author(s):  
B. Tomberli ◽  
F. Girolami ◽  
S. Bardi ◽  
M. Benelli ◽  
E. Contini ◽  
...  
Keyword(s):  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Genetic Causes ◽  
Whole Exome

Juberg-Hayward syndrome is a cohesinopathy, caused by mutation in ESCO2

2020 ◽  
Author(s):  
Piranit Nik Kantaputra ◽  
Prapai Dejkhamron ◽  
Worrachet Intachai ◽  
Chumpol Ngamphiw ◽  
Katsushige Kawasaki ◽  
...  
Keyword(s):  
Short Stature ◽  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Upper Limb ◽  
Autosomal Recessive ◽  
Cleft Lip ◽  
Clinical Findings ◽  
Protein Model ◽  
Whole Exome ◽  
Cleft Lip Palate

Summary Background Juberg-Hayward syndrome (JHS; MIM 216100) is a rare autosomal recessive malformation syndrome, characterized by cleft lip/palate, microcephaly, ptosis, short stature, hypoplasia or aplasia of thumbs, and dislocation of radial head and fusion of humerus and radius leading to elbow restriction. Objective To report for the first time the molecular aetiology of JHS. Patient and methods Clinical and radiographic examination, whole exome sequencing, Sanger sequencing, mutant protein model construction, and in situ hybridization of Esco2 expression in mouse embryos were performed. Results Clinical findings of the patient consisted of repaired cleft lip/palate, microcephaly, ptosis, short stature, delayed bone age, hypoplastic fingers and thumbs, clinodactyly of the fifth fingers, and humeroradial synostosis leading to elbow restriction. Intelligence is normal. Whole exome sequencing of the whole family showed a novel homozygous base substitution c.1654C>T in ESCO2 of the proband. The sister was homozygous for the wildtype variant. Parents were heterozygous for the mutation. The mutation is predicted to cause premature stop codon p.Arg552Ter. Mutations in ESCO2, a gene involved in cohesin complex formation, are known to cause Roberts/SC phocomelia syndrome. Roberts/SC phocomelia syndrome and JHS share similar clinical findings, including autosomal recessive inheritance, short stature, cleft lip/palate, severe upper limb anomalies, and hypoplastic digits. Esco2 expression during the early development of lip, palate, eyelid, digits, upper limb, and lower limb and truncated protein model are consistent with the defect. Conclusions Our study showed that Roberts/SC phocomelia syndrome and JHS are allelic and distinct entities. This is the first report demonstrating that mutation in ESCO2 causes JHS, a cohesinopathy.

scholarly journals Infancy-Onset T1DM, Short Stature, and Severe Immunodysregulation in Two Siblings With a Homozygous LRBA Mutation

2016 ◽  
Vol 101 (3) ◽  
pp. 898-904 ◽  
Author(s):  
Felix Schreiner ◽  
Michaela Plamper ◽  
Gesche Dueker ◽  
Stefan Schoenberger ◽  
Laura Gámez-Díaz ◽  
...  
Keyword(s):  
Short Stature ◽  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Cell Sorting ◽  
Mononuclear Cells ◽  
Fluorescence Activated Cell Sorting ◽  
Truncating Mutation ◽  
Normal Ranges ◽  
Whole Exome ◽  
Lrba Deficiency

Abstract Context: Type 1 diabetes mellitus (T1DM) is caused by autoimmunity against pancreatic β-cells. Although a significant number of T1DM patients have or will develop further autoimmune disorders during their lifetime, coexisting severe immunodysregulation is rare. Objective: Presuming autosomal-recessive inheritance in a complex immunodysregulation disorder including T1DM and short stature in two siblings, we performed whole-exome sequencing. Case Presentation: Two Libyan siblings born to consanguineous parents were presented to our diabetology department at ages 12 and 5 years, respectively. Apart from T1DM diagnosed at age 2 years, patient 1 suffered from chronic restrictive lung disease, mild enteropathy, hypogammaglobulinemia, and GH deficiency. Fluorescence-activated cell sorting analysis revealed B-cell deficiency. In addition, CD4+/CD25+ and CD25high/FoxP3+ cells were diminished, whereas an unusual CD25−/FoxP3+ population was detectable. The younger brother, patient 2, also developed T1DM during infancy. Although his enteropathy was more severe and electrolyte derangements repeatedly led to hospitalization, he did not have significant pulmonary problems. IgG levels and B-lymphocytes were within normal ranges. Results: By whole-exome sequencing we identified a homozygous truncating mutation (c.2445_2447del(C)3ins(C)2, p.P816Lfs*4) in the lipopolysaccharide-responsive beige-like anchor (LRBA) gene in both siblings. The diagnosis of LRBA deficiency was confirmed by a fluorescence-activated cell sorting-based immunoassay showing the absence of LRBA protein in phytohemagglutinin-stimulated peripheral blood mononuclear cells. Conclusion: We identified a novel truncating LRBA mutation in two siblings with T1DM, short stature, and severe immunodysregulation. LRBA mutations have previously been reported to cause multiorgan autoimmunity and immunodysfunction. In light of the variable phenotypes reported so far in LRBA-mutant individuals, LRBA deficiency should be considered in all patients presenting with T1DM and signs of severe immunodysregulation.

ISDN2014_0322: REMOVED: Identification of novel genetic causes of Rett syndrome‐like phenotypes by whole exome sequencing

2015 ◽  
Vol 47 (Part_A) ◽  
pp. 99-99
Author(s):  
Fátima Lopes ◽  
Mafalda Barbosa ◽  
Teresa Temudo ◽  
Joaquim Sá ◽  
Ana Isabel Dias ◽  
...  
Keyword(s):  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Rett Syndrome ◽  
Genetic Causes ◽  
Whole Exome

scholarly journals A de novo frameshift variant of ANKRD11 (c.1366_1367dup) in a Chinese patient with KBG syndrome

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Jing Chen ◽  
Zhongmin Xia ◽  
Yulin Zhou ◽  
Xiaomin Ma ◽  
Xudong Wang ◽  
...  
Keyword(s):  
Short Stature ◽  
Exome Sequencing ◽  
Developmental Delay ◽  
Whole Exome Sequencing ◽  
Slow Wave ◽  
In Silico ◽  
De Novo ◽  
Triangular Face ◽  
Whole Exome ◽  
Kbg Syndrome

Abstract Background KBG syndrome is a rare autosomal dominant genetic disease mainly caused by pathogenic variants of ankyrin repeat domain-containing protein 11 (ANKRD11) or deletions involving ANKRD11. Herein, we report a novel de novo heterozygous frameshift ANKRD11 variant via whole exome sequencing in a Chinese girl with KBG syndrome. Case presentation A 2-year-2-month-old girl presented with a short stature and developmental delay. Comprehensive physical examinations, endocrine laboratory tests and imaging examination were performed. Whole‐exome sequencing and Sanger sequencing were used to detect and confirm the variant associated with KBG in this patient, respectively. The pathogenicity of the variant was further predicted by several in silico prediction tools. The patient was diagnosed as KBG syndrome with a short stature and developmental delay, as well as characteristic craniofacial abnormalities, including a triangular face, long philtrum, wide eyebrows, a broad nasal bridge, prominent and protruding ears, macrodontia of the upper central incisors, dental crowding, and binocular refractive error. Her skeletal anomalies included brachydactyly, fifth finger clinodactyly, and left-skewed caudal vertebrae. Electroencephalographic results generally showed normal background activity with sporadic spikes and slow wave complexes, as well as multiple spikes and slow wave complexes in the bilateral parietal, occipital, and posterior temporal regions during non-rapid-eye-movement sleep. Brain MRI showed a distended change in the bilateral ventricles and third ventricle, as well as malformation of the sixth ventricle. Whole exome sequencing revealed a novel heterozygous frameshift variant in the patient, ANKRD11 c.1366_1367dup, which was predicted to be pathogenic through in silico analysis. The patient had received physical therapy since 4 months of age, and improvement of gross motor dysfunction was evident. Conclusions The results of this study expand the spectrum of ANKRD11 variants in KBG patients and provide clinical phenotypic data for KBG syndrome at an early age. Our study also demonstrates that whole exome sequencing is an effective method for the diagnosis of rare genetic disorders.

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