scholarly journals Vaccine-associated varicella and rubella infections in severe combined immunodeficiency with isolated CD4 lymphocytopenia and mutations inIL7Rdetected by tandem whole exome sequencing and chromosomal microarray

2014 ◽  
Vol 178 (3) ◽  
pp. 459-469 ◽  
Author(s):  
D. K. Bayer ◽  
C. A. Martinez ◽  
H. S. Sorte ◽  
L. R. Forbes ◽  
G. J. Demmler-Harrison ◽  
...  
Keyword(s):  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Severe Combined Immunodeficiency ◽  
Chromosomal Microarray ◽  
Combined Immunodeficiency ◽  
Whole Exome

scholarly journals High-Frequency Exon Deletion of DNA Cross-Link Repair 1C Accounting for Severe Combined Immunodeficiency May Be Missed by Whole-Exome Sequencing

2021 ◽  
Vol 12 ◽  
Author(s):  
Feifan Xiao ◽  
Yulan Lu ◽  
Bingbing Wu ◽  
Bo Liu ◽  
Gang Li ◽  
...  
Keyword(s):  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Rare Variant ◽  
Severe Combined Immunodeficiency ◽  
Cell Receptor ◽  
Homozygous Deletion ◽  
Combined Immunodeficiency ◽  
Cross Link ◽  
Single Nucleotide Variants ◽  
Whole Exome

Next-generation sequencing (NGS) has been used to detect severe combined immunodeficiency (SCID) in patients, and some patients with DNA cross-link repair 1C (DCLRE1C) variants have been identified. Moreover, some compound variants, such as copy number variants (CNV) and single nucleotide variants (SNV), have been reported. The purpose of this study was to expand the genetic data related to patients with SCID carrying the compound DCLRE1C variant. Whole-exome sequencing (WES) was performed for genetic analysis, and variants were verified by performing Sanger sequencing or quantitative PCR. Moreover, we searched PubMed and summarized the data of the reported variants. Four SCID patients with DCLRE1C variants were identified in this study. WES revealed a homozygous deletion in the DCLRE1C gene from exons 1–5 in patient 1, exons 1–3 deletion and a novel rare variant (c.92T>C, p.L31P) in patient 2, exons 1–3 deletion and a novel rare variant (c.328C>G, p.L110V) in patient 3, and exons 1–4 deletion and a novel frameshift variant (c.449dup, p.His151Alafs*20) in patient 4. Based on literature review, exons 1–3 was recognized as a hotspot region for deletion variation. Moreover, we found that compound variations (CNV + SNV) accounted for approximately 7% variations in all variants. When patients are screened for T-cell receptor excision circles (TRECs), NGS can be used to expand genetic testing. Deletion of the DCLRE1C gene should not be ignored when a variant has been found in patients with SCID.

scholarly journals A Novel Non-frameshift ADA Deletion Detected by Whole Exome Sequencing in an Iranian Family with Severe Combined Immunodeficiency

2020 ◽  
Author(s):  
Taravat Talebi ◽  
Alirezai Biglari ◽  
Mohammad Shahroeei ◽  
Majid Changi-Ashtiani ◽  
Hossein Dinmohammadi ◽  
...  
Keyword(s):  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Novel Mutation ◽  
Genetic Disorders ◽  
Severe Combined Immunodeficiency ◽  
Genetic Diagnosis ◽  
Sample Volume ◽  
Combined Immunodeficiency ◽  
Whole Exome ◽  
And Function

Severe combined immunodeficiency (SCID) comprises a heterogeneous group of genetic disorders caused by early defects in the development and function of T cells. Other lymphocyte lineages (B and/or natural killer cells) are variably affected. With a worldwide frequency of approximately 1:50,000 live births, SCID may result from diverse mutations in over 16 genes. Whole-exome sequencing (WES) provides an opportunity for parallel screening of all those genes. This approach is also useful for genetic diagnosis in parents whose infant expired before genetic testing. Here, we describe a heterozygous novel non-frameshift deletion (c.587_598del p.196_199del) in the adenosine deaminase (ADA) gene identified by WES in healthy parents of an expired child with SCID. The mutation was subsequently confirmed to be homozygous in the deceased baby whose left-over blood sample volume was insufficient for direct WES analysis. In conclusion, we here describe a novel mutation in ADA, a well-known SCID gene.  

scholarly journals Case Report: Whole exome sequencing identifies variation c.2308G>A p.E770K in RAG1 associated with B- T- NK+ severe combined immunodeficiency

F1000Research ◽  
2017 ◽  
Vol 5 ◽  
pp. 2532
Author(s):  
Geeta Madathil Govindaraj ◽  
Shamsudheen Karuthedath Vellarikkal ◽  
Rijith Jayarajan ◽  
Rowmika Ravi ◽  
Ankit Verma ◽  
...  
Keyword(s):  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Molecular Diagnosis ◽  
Severe Combined Immunodeficiency ◽  
Combined Immunodeficiency ◽  
Recombination Activating Genes ◽  
Whole Exome ◽  
Clinical Presentations ◽  
Rag 1 ◽  
Cellular Immune

Severe combined immunodeficiency is a large clinically heterogeneous group of disorders caused by a defect in the development of humoral or cellular immune responses. At least 13 genes are known to be involved in the pathophysiology of the disease and the mutation spectrum in SCID has been well documented. Mutations of the recombination-activating genes RAG 1 and RAG 2 are associated with a range of clinical presentations including, severe combined immunodeficiency and autoimmunity. Recently, our understanding of the molecular basis of immune dysfunction in RAG deficiency has improved tremendously with newer insights into the ultrastructure of the RAG complex. In this report, we describe the application of whole exome sequencing for arriving at a molecular diagnosis in a child suffering from B- T- NK+ severe combined immunodeficiency. Apart from making the accurate molecular diagnosis, we also add a genetic variation c.2308G>A p.E770K to the compendium of variations associated with the disease.

scholarly journals Case Report: Whole exome sequencing identifies variation c.2308G>A p.E770K in RAG1 associated with B- T- NK+ severe combined immunodeficiency

F1000Research ◽  
2016 ◽  
Vol 5 ◽  
pp. 2532 ◽  
Author(s):  
Geeta Madathil Govindaraj ◽  
Shamsudheen Karuthedath Vellarikkal ◽  
Rijith Jayarajan ◽  
Rowmika Ravi ◽  
Ankit Verma ◽  
...  
Keyword(s):  
Exome Sequencing ◽  
Whole Exome Sequencing ◽  
Molecular Diagnosis ◽  
Severe Combined Immunodeficiency ◽  
Combined Immunodeficiency ◽  
Widespread Application ◽  
Clinical Scales ◽  
Cellular Immune Responses ◽  
Whole Exome ◽  
Cellular Immune

Severe combined immunodeficiency is a large clinically heterogeneous group of disorders caused by a defect in the development of humoral or cellular immune responses. At least 13 genes are known to be involved in the pathophysiology of the disease and the mutation spectrum in SCID have been well documented. The widespread application of whole-exome sequencing based on next-generation sequencing has offered a new opportunity to systematically screen these genes in clinical scales. In this report, we describe the application of whole exome sequencing for arriving at a molecular diagnosis in a child suffering from B- T- NK+ severe combined immunodeficiency. Apart from making the accurate molecular diagnosis, we also add a genetic variation c.2308G>A p.E770K to the compendium of variations associated with the disease.

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