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Targeted NGS panel for autoinflammation and vasculitis

ABSTRACT: Clinical impact of a targeted next-generation sequencing gene panel for autoinflammation and vasculitis

PROVIDER: PRJEB21374 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR2012520_1.fastq.gz	Fastqsanger.gz
	ERR2012520_2.fastq.gz	Fastqsanger.gz
	ERR2012530_1.fastq.gz	Fastqsanger.gz
	ERR2012530_2.fastq.gz	Fastqsanger.gz
	ERR2012540_1.fastq.gz	Fastqsanger.gz

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Clinical impact of a targeted next-generation sequencing gene panel for autoinflammation and vasculitis.

Project description:BackgroundMonogenic autoinflammatory diseases (AID) are a rapidly expanding group of genetically diverse but phenotypically overlapping systemic inflammatory disorders associated with dysregulated innate immunity. They cause significant morbidity, mortality and economic burden. Here, we aimed to develop and evaluate the clinical impact of a NGS targeted gene panel, the "Vasculitis and Inflammation Panel" (VIP) for AID and vasculitis.MethodsThe Agilent SureDesign tool was used to design 2 versions of VIP; VIP1 targeting 113 genes, and a later version, VIP2, targeting 166 genes. Captured and indexed libraries (QXT Target Enrichment System) prepared for 72 patients were sequenced as a multiplex of 16 samples on an Illumina MiSeq sequencer in 150bp paired-end mode. The cohort comprised 22 positive control DNA samples from patients with previously validated mutations in a variety of the genes; and 50 prospective samples from patients with suspected AID in whom previous Sanger based genetic screening had been non-diagnostic.ResultsVIP was sensitive and specific at detecting all the different types of known mutations in 22 positive controls, including gene deletion, small INDELS, and somatic mosaicism with allele fraction as low as 3%. Six/50 patients (12%) with unclassified AID had at least one class 5 (clearly pathogenic) variant; and 11/50 (22%) had at least one likely pathogenic variant (class 4). Overall, testing with VIP resulted in a firm or strongly suspected molecular diagnosis in 16/50 patients (32%).ConclusionsThe high diagnostic yield and accuracy of this comprehensive targeted gene panel validate the use of broad NGS-based testing for patients with suspected AID.

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Project description:Both innate and adaptive immune responses are reportedly increased in Behcet’s disease (BD), a chronic-relapsing systemic vasculitis lying at the intersection between autoinflammation and autoimmunity. To further study pathophysiologic molecular mechanisms operating in BD we searched for transcriptome-wide changes in blood mononuclear cells from these patients. We performed 3’ mRNA next generation sequencing-based genome-wide transcriptional profiling followed by analysis of differential expression signatures, KEGG pathways, GO biological processes and transcription factor signatures al 25 samples (11 healthy controls and 14 BD).

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Autoinflammation with enhanced type I interferon signaling due to DNASE2 mutations

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EXPLORING GENE EXPRESSION PROFILES IN PRIMARY CENTRAL NERVOUS SYSTEM VASCULITIS

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Project description:The aim of this study was to compare copy-number-variation (CNV) detection methods for targeted NGS panel data in a clinical diagnostic setting. We present targeted NGS panel data from 170 samples that were processed using the TruSight(TM) Cancer (TSC) panel (Illumina, San Diego, CA, USA), which targets 94 genes and 284 SNPs associated with a predisposition towards cancer. The samples are enriched for CNVs in the genes of interest. All CNVs have previously been assessed with MLPA and can therefore be considered as confirmed.

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Blood transcriptome indicates different disease etiology in pediatric ANCA-associated vasculitis subtypes.

Project description:Purpose: The goal of this study was to compare gene expression profiles from whole blood RNA-Seq data from pediatric ANCA-associated vasculitis patients to identify mechanistic endotypes. Methods: Whole blood mRNA profiles were generated from pediatric and adult vasculitis patients using Illumina GAIIx or Hi Seq 2500 RNA-Seq. Fastq files were alinged to human genome version GRC38.91 using STAR v2.6 and count data was generated with HTSEQ v0.61p1. Counts that passed quality and minimum expression filteres were anlayzed by hierarchical clustering based on Euclidean distance, and then for differential expression with DESeq2. Results: Our workflow identified 14,156 transcripts consistently expressed in vasculitis patients. Distance hierarchcial clustering identified three groups within these pediatric samples, and two groups plus one outlier in the adult samples. The two largest pediatric clusters were used as groups for differential expression analysis with the DESeq2 package for R. DE analysis identified 3,809 differentially expressed genes between clusters. Between the two adult groups, 1,682 genes were differentially expressed. DE genes were anlayzed for enrichment using ReatomePA as the reference database. This analysis revealed that genes involved in T-cell mediated immunity are more highly expressed in pediatric patients that fell into one endotype and those involved in neutrophil and Toll-like receptor mediated inflammation are more highly expressed in pediatric patients that fell into the other endotype group. Similar results were also seen in adults. Conclusions: This study utilizes RNA-Seq data to investigate the etiologies of ANCA-associated vasculitis. Using this approach we have identified T-cell mediated immunity and Toll-like receptor mediated inflammation as potentially differing inflammatory mechanisms in both pediatric and adult vasculitis patients that do not fall along normal diagnostic criteria.

2021-01-01 | GSE129752 | GEO

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