Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA388978 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR5642420_1.fastq.gz | Fastqsanger.gz | |||
| SRR5642420_2.fastq.gz | Fastqsanger.gz | |||
| SRR5642430_1.fastq.gz | Fastqsanger.gz | |||
| SRR5642430_2.fastq.gz | Fastqsanger.gz | |||
| SRR5642421_1.fastq.gz | Fastqsanger.gz |
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Project description:RATIONALE: Idiopathic pulmonary fibrosis (IPF) is a fatal disease with overtly scarred peripheral and basilar lung regions and macroscopically unaffected central lung areas. OBJECTIVES: To gain better insight into IPF pathobiology by comparing transcriptomic profiles of normal-appearing and scarred regions of IPF lung. METHODS: Lung tissue samples from macroscopically unaffected (normal-appearing, IPFn) and scarred (IPFs) regions of explanted IPF lungs were analyzed by RNASeq and compared with healthy control (HC) lung tissues. RT-qPCR and immunohistochemistry were used to confirm selected findings. MEASUREMENTS AND RESULTS: Numerous previously reported IPF-associated gene expression disturbances as well as additional differentially expressed mRNAs were observed. There were profound transcriptomic changes in IPFn compared with HC tissues, which included elevated expression of extracellular matrix-, immunity- and inflammation-related mRNAs. The magnitude and statistical significance of these changes were comparable or greater than those in the IPFs-to-HC comparison. When directly compared with IPFn, IPFs tissues demonstrated elevated expression of epithelial mucociliary mRNAs. Compared with HC, both IPFn and IPFs tissues demonstrated reduced expression of mRNAs related to solute carrier membrane transport and metabolic processes. Primary fibroblast cultures from IPFn and IPFs tissues were transcriptomically identical. CONCLUSIONS: Macroscopically normal-appearing IPF tissues demonstrate profound disease activity and substantially similar transcriptomic profiles to scarred areas. Differences between these tissues are due to cell types other than fibroblasts and notably include enhanced expression of mucociliary genes in scarred areas. Deranged epithelial homeostasis or possibly non-transcriptomic factors may thus explain the marked architectural differences between normal-appearing and terminally scarred lung in end-stage IPF.
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