Phenotypic Heterogeneity and Genotypic Spectrum of Inborn Errors of Immunity Identified through Whole Exome Sequencing in a Thai Patient Cohort

2021 ◽  
Author(s):  
Maliwan Tengsujaritkul ◽  
Narissara Suratannon ◽  
Chupong Ittiwut ◽  
Rungnapa Ittiwut ◽  
Pantipa Chatchatee ◽  
...  
Keyword(s):  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Phenotypic Heterogeneity ◽  
Inborn Errors ◽  
Thai Patient ◽  
Patient Cohort ◽  
Inborn Errors Of Immunity ◽  
Whole Exome

Whole-Exome Sequencing-Based Approach for Germline Mutations in Patients with Inborn Errors of Immunity

2020 ◽  
Vol 40 (5) ◽  
pp. 729-740 ◽  
Author(s):  
Tsubasa Okano ◽  
Kohsuke Imai ◽  
Takuya Naruto ◽  
Satoshi Okada ◽  
Motoi Yamashita ◽  
...  
Keyword(s):  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Germline Mutations ◽  
Inborn Errors ◽  
Inborn Errors Of Immunity ◽  
Whole Exome

scholarly journals Whole-exome sequencing for detecting inborn errors of immunity: overview and perspectives

F1000Research ◽  
2017 ◽  
Vol 6 ◽  
pp. 2056
Author(s):  
Barbara Bosch ◽  
Yuval Itan ◽  
Isabelle Meyts
Keyword(s):  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Molecular Mechanisms ◽  
Future Research ◽  
Sequencing Analysis ◽  
Genetic Etiology ◽  
Inborn Errors ◽  
Inborn Errors Of Immunity ◽  
Whole Exome ◽  
Clinical Description

The study of inborn errors of immunity is based on a comprehensive clinical description of the patient’s phenotype and the elucidation of the underlying molecular mechanisms and their genetic etiology. Deciphering the pathogenesis is key to genetic counseling and the development of targeted therapy. This review shows the power of whole-exome sequencing in detecting inborn errors of immunity along five central steps taken in whole-exome sequencing analysis. In parallel, we highlight the challenges for the clinical and scientific use of the method and how these hurdles are currently being addressed. We end by ruminating on major areas in the field open to future research.

scholarly journals Whole exome sequencing in inborn errors of immunity

2017 ◽  
Vol 17 (6) ◽  
pp. 421-430 ◽  
Author(s):  
Giorgia Bucciol ◽  
Erika Van Nieuwenhove ◽  
Leen Moens ◽  
Yuval Itan ◽  
Isabelle Meyts
Keyword(s):  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Inborn Errors ◽  
Inborn Errors Of Immunity ◽  
Whole Exome

scholarly journals A single‐center pilot study in Malaysia on the clinical utility of whole‐exome sequencing for inborn errors of immunity

2021 ◽  
Author(s):  
Adiratna Mat Ripen ◽  
Chai Teng Chear ◽  
Mohd Farid Baharin ◽  
Revathy Nallusamy ◽  
Kwai Cheng Chan ◽  
...  
Keyword(s):  
Pilot Study ◽  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Clinical Utility ◽  
Single Center ◽  
Inborn Errors ◽  
Inborn Errors Of Immunity ◽  
Whole Exome

scholarly journals Ablepharon macrostomia syndrome in a Thai patient: case report and literature review

2020 ◽  
Vol 14 (2) ◽  
pp. 83-88
Author(s):  
Phawin Kor-anantakul ◽  
Kanya Suphapeetiporn ◽  
Somchit Jaruratanasirikul
Keyword(s):  
Case Report ◽  
Literature Review ◽  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Sequencing Analysis ◽  
Patient Case ◽  
Thai Patient ◽  
Labia Minora ◽  
Whole Exome ◽  
Rare Congenital Disorder

AbstractAblepharon macrostomia syndrome (AMS) is a rare congenital disorder. To our knowledge, only 20 cases have been reported to date, and all in patients from Western countries. We report a case of AMS in a Thai patient, who presented at age 3 months with severe ectropion of both upper and lower eyelids, alopecia totalis, no palpable clitoris, and hypoplasia of both labia minora and labia majora. Trio whole exome sequencing analysis was performed, which revealed a heterozygous missense c.223G>A (p.Glu75Lys) variation in TWIST2. To our knowledge, this is the first reported case of AMS in a patient from Thailand and the first reported case of AMS in Asia.

scholarly journals Phenotypic Heterogeneity and Genotypic Spectrum of Primary Immunodeficiencies with Whole Exome Sequencing in a Thai Patient Cohort

2021 ◽  
Author(s):  
Maliwan Tengsujaritkul ◽  
Narissara Suratannon ◽  
Chupong Ittiwut ◽  
Rungnapa Ittiwut ◽  
Pantipa Chatchatee ◽  
...  
Keyword(s):  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Clinical Decision Making ◽  
Diagnostic Yield ◽  
Disease Onset ◽  
Clinical Manifestations ◽  
Genetic Defects ◽  
Diagnostic Strategy ◽  
Patient Cohort ◽  
Whole Exome

Background: Primary immunodeficiency diseases (PIDs) comprise more than 400 rare diseases with potential life-threatening conditions. Clinical manifestations and genetic defects are heterogeneous and diverse among populations. Here, we aimed to characterize the clinical, immunological and genetic features of Thai pediatric patients with PIDs. The use of whole exome sequencing (WES) in diagnosis and clinical decision making was also assessed. Methods: 36 unrelated patients with clinical and laboratory findings consistent with PIDs were recruited from January 2010 to December 2020. WES was performed to identify the underlying genetic defects. Results: The median age of disease onset was 4 months (range; 1 month to 13 years) and 24 were male (66.7%). Recurrent sinopulmonary tract infection was the most common clinical presentation followed by septicemia, and severe pneumonia. Using WES, we successfully identified the underlying genetic defects in 18 patients (50%). Of the 20 variants identified, six have not been previously described (30%). According to the International Union of Immunological Societies (IUIS), 38.9% of these detected cases (7/18) were found to harbor variants associated with genes in combined immunodeficiencies with associated or syndromic features (Class II). Conclusion: The diagnostic yield of WES in this patient cohort was 50%. Six novel genetic variants in PID genes were identified. The clinical usefulness of WES in PIDs was demonstrated, emphasizing it as an effective diagnostic strategy in these genetically heterogeneous disorders.

scholarly journals Novel Discoveries in Immune Dysregulation in Inborn Errors of Immunity

2021 ◽  
Vol 12 ◽  
Author(s):  
Anwen Ren ◽  
Wei Yin ◽  
Heather Miller ◽  
Lisa S. Westerberg ◽  
Fabio Candotti ◽  
...  
Keyword(s):  
Whole Genome Sequencing ◽  
Exome Sequencing ◽  
Genome Sequencing ◽  
Immune Dysregulation ◽  
Genetic Mutation ◽  
Disease Monitoring ◽  
Whole Genome ◽  
Inborn Errors ◽  
Inborn Errors Of Immunity ◽  
Whole Exome

With the expansion of our knowledge on inborn errors of immunity (IEI), it gradually becomes clear that immune dysregulation plays an important part. In some cases, autoimmunity, hyperinflammation and lymphoproliferation are far more serious than infections. Thus, immune dysregulation has become significant in disease monitoring and treatment. In recent years, the wide application of whole-exome sequencing/whole-genome sequencing has tremendously promoted the discovery and further studies of new IEI. The number of discovered IEI is growing rapidly, followed by numerous studies of their pathogenesis and therapy. In this review, we focus on novel discovered primary immune dysregulation diseases, including deficiency of SLC7A7, CD122, DEF6, FERMT1, TGFB1, RIPK1, CD137, TET2 and SOCS1. We discuss their genetic mutation, symptoms and current therapeutic methods, and point out the gaps in this field.

scholarly journals Next-Generation Sequencing in the Field of Primary Immunodeficiencies: Current Yield, Challenges, and Future Perspectives

2021 ◽  
Author(s):  
Emil E. Vorsteveld ◽  
Alexander Hoischen ◽  
Caspar I. van der Made
Keyword(s):  
Next Generation Sequencing ◽  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Diagnostic Yield ◽  
Primary Immunodeficiencies ◽  
Next Generation ◽  
Inborn Errors ◽  
New Genes ◽  
Whole Exome ◽  
Generation Sequencing

AbstractPrimary immunodeficiencies comprise a group of inborn errors of immunity that display significant clinical and genetic heterogeneity. Next-generation sequencing techniques and predominantly whole exome sequencing have revolutionized the understanding of the genetic and molecular basis of genetic diseases, thereby also leading to a sharp increase in the discovery of new genes associated with primary immunodeficiencies. In this review, we discuss the current diagnostic yield of this generic diagnostic approach by evaluating the studies that have employed next-generation sequencing techniques in cohorts of patients with primary immunodeficiencies. The average diagnostic yield for primary immunodeficiencies is determined to be 29% (range 10–79%) and 38% specifically for whole-exome sequencing (range 15–70%). The significant variation between studies is mainly the result of differences in clinical characteristics of the studied cohorts but is also influenced by varying sequencing approaches and (in silico) gene panel selection. We further discuss other factors contributing to the relatively low yield, including the inherent limitations of whole-exome sequencing, challenges in the interpretation of novel candidate genetic variants, and promises of exploring the non-coding part of the genome. We propose strategies to improve the diagnostic yield leading the way towards expanded personalized treatment in PIDs.

scholarly journals Whole-exome sequencing-based discovery of STIM1 deficiency in a child with fatal classic Kaposi sarcoma

2010 ◽  
Vol 207 (11) ◽  
pp. 2307-2312 ◽  
Author(s):  
Minji Byun ◽  
Avinash Abhyankar ◽  
Virginie Lelarge ◽  
Sabine Plancoulaine ◽  
Ayse Palanduz ◽  
...  
Keyword(s):  
T Cell ◽  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Single Gene ◽  
Human Herpesvirus ◽  
Kaposi Sarcoma ◽  
Single Family ◽  
Inborn Errors ◽  
Whole Exome ◽  
Classic Kaposi Sarcoma

Classic Kaposi sarcoma (KS) is exceedingly rare in children from the Mediterranean Basin, despite the high prevalence of human herpesvirus-8 (HHV-8) infection in this region. We hypothesized that rare single-gene inborn errors of immunity to HHV-8 may underlie classic KS in childhood. We investigated a child with no other unusually severe infectious or tumoral phenotype who died from disseminated KS at two years of age. Whole-exome sequencing in the patient revealed a homozygous splice-site mutation in STIM1, the gene encoding stromal interaction molecule 1, which regulates store-operated Ca2+ entry. STIM1 mRNA splicing, protein production, and Ca2+ influx were completely abolished in EBV-transformed B cell lines from the patient, but were rescued by the expression of wild-type STIM1. Based on the previous discovery of STIM1 deficiency in a single family with a severe T cell immunodeficiency and the much higher risk of KS in individuals with acquired T cell deficiencies, we conclude that STIM1 T cell deficiency precipitated the development of lethal KS in this child upon infection with HHV-8. Our report provides the first evidence that isolated classic KS in childhood may result from single-gene defects and provides proof-of-principle that whole-exome sequencing in single patients can decipher the genetic basis of rare inborn errors.

scholarly journals A.07 Genomics of atypical dyskinetic cerebral palsy – opportunities for improved diagnosis and management

2017 ◽  
Vol 44 (S2) ◽  
pp. S10-S10
Author(s):  
H Goez ◽  
A Matthews ◽  
B Al Jabri ◽  
I Blydt-Hansen ◽  
J Andersen ◽  
...  
Keyword(s):  
Cerebral Palsy ◽  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Genetic Variants ◽  
Inborn Errors Of Metabolism ◽  
Inborn Errors ◽  
Chromosomal Disorders ◽  
Glutaric Aciduria ◽  
Whole Exome ◽  
Deep Brain

Background: Cerebral palsy (CP) is a debilitating disorder (1). Based on neuromotor impairments it is divided to spastic, dyskinetic and ataxic types (2). Inborn Errors of Metabolism (IEMs), monogenic and chromosomal disorders mimic CP (3). We aimed to identify causal genetic variants in patients with atypical dyskinetic CP in whom known IEMs were ruled out. Timely diagnosis is essential for proper management, especially in conditions that mimic CP and are treatable. Methods: We enrolled 23 patients with unexplained atypical dyskinetic CP, for whole exome sequencing. Variants were filtered against public and in-house databases to identify variants predicted as damaging (in silico tools and ACMG criteria). We applied a virtual gene panel of known and suspected CP and movement disorder genes and investigated each sample. Results: The participants presented with symptoms including: spasticity, dystonia, choera-athetosis, ataxia and cognitive delays. We identified 23 diagnoses: 13 dominant,6 recessive and 4 X-linked. 12 patients had movement disorders. In 4, the diagnoses enabled targeted treatment (neurotransmitter supplements in Unverricht Lundborg diseases (CSTB) and PAK3 deficiency, deep brain stimulation in GNAO1 deficiency, medical diet in Glutaric Aciduria (GCDH). Conclusions: Whole Exome Sequencing contributes to establishing diagnosis in patients with atypical dyskinetic CP resulting in precision medicine and improved health outcomes.

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