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Spatial deconvolution of tertiary lymphoid structure in human IPF lungs revealed novel CCL19-expressing mural cells

ABSTRACT: Spatial deconvolution of tertiary lymphoid structure in human IPF lungs revealed novel CCL19-expressing mural cells

PROVIDER: PRJNA1041738 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26860524_1.fastq.gz	Fastqsanger.gz
	SRR26860524_2.fastq.gz	Fastqsanger.gz
	SRR26860525_1.fastq.gz	Fastqsanger.gz
	SRR26860525_2.fastq.gz	Fastqsanger.gz
	SRR26860526_1.fastq.gz	Fastqsanger.gz

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Spatial deconvolution of tertiary lymphoid structure in human IPF lungs revealed novel CCL19-expressing mural cells

Project description:Tertiary lymphoid structures (TLS) are commonly observed in human idiopathic pulmonary fibrosis (IPF) lungs. The specific immune and non-immune cells in the TLS of IPF patients, and the factors that drive TLS formation, remain largely unknown. Here we spatially deconvoluted immune and non-immune cells in the TLS of human IPF lungs, and examined the signals underlying TSL development in IPF patients. We identified a novel subset of CCL19hi-IPF-associated-mural cells (CCL19hiIAMC) that enveloped the vessels inside the TLS. CCL19hiIAMCs were the major source of CCL19 inside the TLS of IPF lungs, attracting T/B lymphocytes and unique CCR7+DCs to drive TLS formation. CCL19hiIAMCs also provided other pro-TLS and proinflammatory molecules to promote lymphocyte maturation and tissue inflammation. Our data also reveal that various IPF-associated fibroblasts surrounded the TLS, promoting TLS development and plasma cells dissemination via CXCL12/CXCR4 signaling. CCR7 and CXCR4 signaling attracted lymphocytes and DCs that upregulated pro-TLS genes in the IPF microenvironment to enhance TLS formation. Together, these findings have deconvoluted the cell subsets and their transcriptomes in the TLS of IPF lungs and suggest that novel CCL19hiIAMCs may drive TLS formation in collaboration with various immune cells and fibroblasts.

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Human IPF and control lungs LC-MSMS

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Differences between fibroblasts derived from normal and IPF lungs

Project description:Objective: To evaluate the characteristics of IPF lungs in fibroblasts, we performed RNA-Sequencing of fibroblasts derived from normal and IPF lungs Method:　NHLF（Normal human lung fibroblast）　and DHLF-IPF (DIPF; Diseased human lung fibroblasts derived from idiopathic pulmonary fibrosis)　were purchased from Lonza (Walkersville, MD, USA) .Total RNA was extracted from fibroblasts (NHLF and DIPF) using an RNeasy® Mini Kit (#74106; Qiagen, Valencia, CA, USA). Preparation of a next-generation sequencing library was performed using a SMARTer® Stranded Total RNA Sample Prep Kit–Pico Input Mammalian (TaKaRa, Shiga, Japan). Sequencing was performed on an Illumina HiSeq 2500 platform in 75-base single-end mode with Illumina Casava 1.8.2 software for base calling. Sequenced reads were mapped to the human reference genome sequence (hg19) using TopHat v.2.0.13 software, in combination with Bowtie 2 v.2.2.3 and SAMtools v.0.1.19. Result: Of the 26,257 genes analyzed, for NHLF and DHLF-IPF (DIPF), FPKM was required to be greater than or equal to 0.3. Under these conditions, 764 genes were up regulated inDHLF-IPF (DIPF) and 691 genes were down regulated.

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Gene expression signatures for Normal-looking, fibrotic foci and hyperplastic (adjacent to fibrotic foci) area in IPF lungs

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