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Single-nuclei transcriptome analysis of IgM+ cells isolated from channel catfish spleen

ABSTRACT: Channel catfish, Ictalurus punctatus, are the primary cultured species of the catfish industry. Significant losses in production are attributed to bacterial diseases which are challenging to control and new interventions need to be developed. To gain insight into the in situ catfish immune system, we used single-nuclei RNAseq. We produced two single-nuclei atlases from three individual catfish using flow cytometry sorted IgM+ splenic cells. Libraries were prepared using the 10X Genomics system and sequenced on an Illumina sequencer. The reads were aligned to the reference genome (Ip Coco_2.0) using Cell Ranger (v8.0.0).

ORGANISM(S): Ictalurus punctatus

PROVIDER: GSE278995 | GEO | 2025/04/09

REPOSITORIES: GEO

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Gene expression profiling at the single nuclei level of channel catfish spleen

Project description:Channel catfish, Ictalurus punctatus, is an important model U.S. aquaculutre species. Given its role in food production, the catfish immune response to industry-relevant pathogens has been extensively studied and has provided crucial information on innate and adaptive immune function during disease progression. To further examine the channel catfish immune system, single-nuclei RNA sequencing on whole spleens from three adult individuals was performed. Spleen cell suspensions were prepared by passing tissues through cell sieves. Single-cell RNAseq libraries were then prepared using the 10X Genomics Chromium X with the Next GEM Single Cell 3’ Reagents and sequenced 2x150bp on an Illumina sequencer. Each demultiplexed library was aligned to the CoCo_2.0 channel catfish reference assembly, filtered, and counted to generate feature-barcode matrices. Cluster analysis allowed for the identification of multiple cell types including erythrocytes, hematopoietic stem cells, B cells, T/NK cells, myeloid lineage derivatives, plasma cells and endothelial cells. The majority of cells detected were erythrocytes, which are nucleated in teleost fish.

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Global gene expression in catfish spleen after injection of lipopolysaccharide

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