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Total RNAseq of human healthy control inferior turbinate and glucocorticoid-treated, aspirin-exacerbated respiratory disease (AERD) nasal polyp nasal brushings

ABSTRACT: Total RNAseq of human healthy control inferior turbinate and glucocorticoid-treated, aspirin-exacerbated respiratory disease (AERD) nasal polyp nasal brushings

PROVIDER: PRJEB32590 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR3324390_1.fastq.gz	Fastqsanger.gz
	ERR3324390_2.fastq.gz	Fastqsanger.gz
	ERR3324391_1.fastq.gz	Fastqsanger.gz
	ERR3324391_2.fastq.gz	Fastqsanger.gz
	ERR3324382_1.fastq.gz	Fastqsanger.gz

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Total RNAseq of human healthy control inferior turbinate and glucocorticoid-treated, NSAID-exacerbated respiratory disease (N-ERD) nasal polyp nasal brushings

Project description:NSAID-exacerbated respiratory disease (N-ERD) represents a particularly severe endotype of chronic rhinosinusitis with nasal polyps (CRSwNP), which affects around 10-16% of CRSwNP patients. N-ERD is characterized by severe and refractory nasal polyposis, bronchial asthma and intolerance to non-steroidal anti-inflammatory drugs (NSAIDs), including aspirin. Today, the pathogenesis of N-ERD remains incompletely understood and curative treatments are lacking. Using a global transcriptomic approach, we identified local changes between the mucosa of N-ERD nasal polyps and healthy control inferior turbinates. Nasal brushing samples were collected from inferior turbinates of healthy controls and nasal polyps of N-ERD patients under anterior rhinoscopy and stored at -80°C in RNAprotect until RNA isolation and RNAseq.

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Project description:The objective of this study was to determine if nasal transcriptomics could be used to characterize the underlying pathobiology and predict clinical course of patients with pediatric ARDS (PARDS). Subjects meeting consensus PARDS criteria or controls admitted to the Pediatric ICU without lung disease had nasal cytology brushings on days 1, 3, 7 and 14. The gene expression of these brushings was compared to identify subtypes and describe clinical course. Concurrent nasal and bronchial brushings were collected if bronchoscopy was performed. We identified four PARDS subgroups, termed A, B, C, and D. Subgroup B was marked by inflammation and ciliary cell dysfunction. Subgroup D was marked by reduced epithelial stem cell mRNAs without inflammation. Subgroup A had hypo-inflammation and upregulation of pathways important in epithelial cell repair. Subgroup C had increased ciliary cell genes. Control specimens almost entirely clustered with Subgroup C, but one that developed PARDS clustered with Subgroup B and several that developed lung injury clustereced with Subgroups B and A. Over time, Subgroups D and B transitioned to A which transitioned to C. Bronchial and nasal gene expresison were similar.

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Project description:Allergic nasal polyposis is a chronic type 2 inflammatory condition of the upper respiratory tract. We characterize nasal polyps from 5 subjects using single-cell RNA-sequencing, identifying “allergic” tuft cells, characterized by increased expression of the prostaglandin synthetic pathway, in association with a PGE2-activated gene signature.

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Project description:Objectives: To determine whether disease processes related to granulomatosis with polyangiitis (GPA) are reflected in gene expression profiles of nasal mucosa. Methods: Nasal brushings of the inferior turbinate were obtained from 32 patients with GPA (10 with active nasal disease, 13 with prior nasal disease, 9 with no history of nasal disease) and a composite comparator group with and without inflammatory nasal disease (12 healthy people, 15 with sarcoidosis, 8 with allergic rhinitis). Differential gene expression was assessed between subgroups of GPA and comparators. Results: 339 genes were differentially expressed between the GPA and comparator groups (absolute fold change > 1.5; false discovery rate < 0.05). Top canonical pathways upregulated in nasal brushings from patients with GPA include granulocyte adhesion and diapedesis (p=8.6 E-22), agranulocyte adhesion and diapedesis (p=1.3 E-14), interleukin 10 signaling (3.0 E-11), and TREM1 signaling (9.0 E-11). A set of genes differentially expressed in GPA independent of nasal disease activity status included genes related to epithelial barrier integrity (fibronectin 1, desmosomal proteins) and several matricellular proteins (e.g. osteonectin, osteopontin). Significant overlap of differentially expressed genes was observed between active and prior nasal disease GPA subgroups. Peripheral blood neutrophil and mononuclear gene expression levels associated with GPA were similarly altered in the nasal gene expression profiles of patients with active or prior nasal disease. Conclusions: Profiling the nasal transcriptome in GPA reveals gene expression signatures related to innate immunity, inflammatory cell chemotaxis, extracellular matrix composition, and epithelial barrier integrity. Airway-based expression profiling is feasible and informative in GPA.

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