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ABSTRACT: Transcriptome analysis of Micropterus salmoides to Aeromonas veronii challenge in heat stress

PROVIDER: PRJNA748458 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR15204249_1.fastq.gz	Fastqsanger.gz
	SRR15204249_2.fastq.gz	Fastqsanger.gz
	SRR15204250_1.fastq.gz	Fastqsanger.gz
	SRR15204250_2.fastq.gz	Fastqsanger.gz
	SRR15204251_1.fastq.gz	Fastqsanger.gz

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Project description:Largemouth bass (Micropterus salmoides) were challenged with Aeromonas veronii (Av), Aeromonas hydrophila (Ah), Flavobacterium columnare (Fc), and coinfections (AvFc, AhFc), alongside mock-challenged and pre-challenge controls. Gill and spleen tissues were sampled at 0h (pre-challenge baseline), 12h, and 24h post-challenge. RNA-Seq was performed on 161 samples (79 gill, 82 spleen; 6 biological replicates per treatment/timepoint group, 10 for pre-challenge). Three gill samples were excluded due to low mapping rates consistent with gDNA contamination (11B3G, 15J2G, 29R3G). Differential expression analysis was performed using DESeq2 across 72 pairwise contrasts per tissue.

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Project description:The bacterium Aeromonas veronii is a co-pathogenic species that can negatively impact the health of both humans and aquatic animals. In this study, we used single-cell transcriptome analysis (scRNA-seq) to investigate the effects of infection with A. veronii on head kidney cells and the regulation of gene expression in the dark sleeper (Odontobutis potamophila). scRNA-seq was used to assess the effects of infection with A. veronii in O. potamophila B cells, endothelial cells, macrophages, and granulocytes, and differential enrichment analysis of gene expression in B cells and granulocytes was performed. The analyses revealed a significant increase in neutrophils and decrease in eosinophils in granulocytes infected with A. veronii. Activation of neutrophils enhanced ribosome biogenesis by up-regulating the expression of rps12 and rpl12 to fight against invading pathogens. Crucial pro-inflammatory mediators il1b, ighv1-4, and the major histocompatibility class II genes mhc2a and mhc2dab, which are involved in virulence processes, were up-regulated, suggesting that A. veronii activates an immune response that presents antigens and activates immunoglobulin receptors in B cells. These cellular immune responses triggered by infection with A. veronii enriched the available scRNA-seq data for teleosts, and these results are important for understanding the evolution of cellular immune defense and functional differentiation of head kidney cells.

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Project description:Micropterus salmoides transcriptome

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