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Strong correlation between air-liquid interface cultures and in vivo transcriptomics of nasal brush biopsy

ABSTRACT: Strong correlation between air-liquid interface cultures and in vivo transcriptomics of nasal brush biopsy

PROVIDER: PRJNA606035 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR11067230_1.fastq.gz	Fastqsanger.gz
	SRR11067230_2.fastq.gz	Fastqsanger.gz
	SRR11067231_1.fastq.gz	Fastqsanger.gz
	SRR11067231_2.fastq.gz	Fastqsanger.gz
	SRR11067232_1.fastq.gz	Fastqsanger.gz

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Strong correlation between air-liquid interface cultures and in vivo transcriptomics of nasal brush biopsy

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Oral premalignant lesions (OPLs) with genomic alterations have a heightened risk of evolving into oral squamous cell carcinoma (OSCC). Currently, genomic data are obtained through invasive tissue biopsy. Brush biopsy has been utilized for diagnosing dysplasia but its effectiveness in reflecting the complete genomic landscape of OPLs remains uncertain. This study investigates the potential of brush biopsy samples in accurately reconstructing the genomic profile of OPLs. We analyzed single nucleotide variants (SNVs), copy number aberrations (CNAs), and subclonal structures in paired tissue and brush biopsy samples from a patient with both OPL and OSCC lesions. The results showed that brush biopsy can effectively reflect about 90% of SNVs and similar CNA profiles as those found in tissue biopsies. It was specific, as normal oral epithelium didn’t share these genomic alterations. Interestingly, brush biopsy revealed shared SNVs and CNAs between the distinct OPL and OSCC lesions, indicating a common ancestral origin. Subclonal reconstruction confirmed this shared ancestry, followed by divergent evolution of the lesions. These findings highlight the potential of brush biopsies in accurately representing the genomic profile of OPL and OSCC, proving useful in understanding tumor evolution.

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Project description:Purpose: Tracheal epithelial brush cells are rare chemosensory cells defined by their expression of elements of the bitter taste transduction system, and known to activate the cholinergic nervous system in the murine lung. Similar chemosensory cells in the intestine can generate lipid mediators and pro-inflammatory cytokines but whether brush cell can contribute to airway inflammation is unknown. Furthermore, despite the advances in understanding chemosensory cell effector functions, the receptors that mediate chemosensory cell activation and expansion beyond taste receptors in any compartment remain largely unknown. Methods: In this study, we isolated tracheal brush cells by FACS from naïve ChATBAC-eGFP mice with knockin of eGFP within a BAC spanning the acetylcholine transferase locus, marking brush cells in the epithelium and performed transcriptome profiling using low input RNA sequencing. We compared tracheal brush cells to EpCAM+ epithelial cells and CD45+ hematopoetic cells in naive mice. Results: When compared to EpCAM+ EpCs and to CD45+ cells in the airway, principal component analysis demonstrated that brush cells grouped quite distinctly. This brush cell distinction relative to EpCAM+ cells, was further reflected in the striking number of highly differentially expressed genes. This included 1305 genes expressed at 4-fold or higher levels in EpCAM+eGFP+ cells (brush cells), of which 418 genes were expressed at 32-fold or higher levels in brush cells. Conclusions: Our study represents the first detailed analysis of the transcriptome of tracheal brush cells and identifies a unique set of genes that are primarily expressed in brush cells including the bitter taste transduction system, synthenic machinery for several pro-inflammatory lipid mediators and HoxA2 transciptional factors.

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