Revealing New Landscape of Turbot (Scophthalmus maximus) Spleen Infected with Aeromonas salmonicida through Immune Related circRNA-miRNA-mRNA Axis

LncRNA (BCO1-AS) regulate inflammatory responses in bacterial infection through caspase-1 in turbot (Scophthalmus maximus)

LncRNA plays key role in several biological processes, including transcriptional regulation, post transcriptional control and epigenetic regulation. However, research on the functional roles of lncRNAs in teleost species remains limited. Here, we discovered a lncRNA (BCO1-AS) with a critical role in antibacterial responses. Briefly, the full length of BCO1-AS was 2005 bp. Subsequently, BCO1-AS was distributed throughout the nucleus, where it may either trans- or cis-regulate the nearby genes. In addition, BCO1-AS was widely expressed in all the examined tissues with the highest expression level in intestine, while the lowest expression level was detected in muscle. Moreover, following Vibrio anguillarum challenge, BCO1-AS was significantly down-regulated in intestine, and up-regulated in gill and skin. In CHIRP experiment, BCO1-AS could effectively enrich RNA and might interact with several immune-related genes. Furthermore, we found that LPS could induce the expression of BCO1-AS. Finally, BCO1-AS could positively regulate caspase-1 at the mRNA and protein level. The BCO1-AS was speculated to inhibit the synthesis of inflammatory components. In summary, these results showed the roles of BCO1-AS in the regulation of inflammatory in turbot, which provided valuable information for further understanding the immune regulation network of lncRNA in teleost fish.

The Application of Genetic and Genomic Biotechnology in Aquaculture

This Special Issue, "The Application of Genetic and Genomic Biotechnology in Aquaculture," collates 14 published manuscripts covering different aspects of implementing advanced molecular genetics and genomic science in aquaculture [...].

Transcriptome analysis of turbot (Scophthalmus maximus) head kidney and liver reveals immune mechanism in response to Vibrio anguillarum infection

The diseases triggered by Vibrio anguillarum infection have created huge economic losses to the turbot (Scophthalmus maximus) farming industry. However, the immune mechanism of turbot to V. anguillarum infection has not been deeply investigated. To better understand the immune response of turbot to V. anguillarum infection, transcriptome analysis of the head kidney and liver of turbot was performed. A total of 15,948 and 11,494 differentially expressed genes (DEGs) were obtained from the turbot head kidney and liver, respectively. Transcriptome analysis revealed that the head kidney and liver of turbot have some differences in the gene ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analysis of the DEGs for the different functions of these two organs. Although there are many uncertain factors in this immune process, such as the occurrence of alternative splicing (AS) events and the differences in the protein structure of the DEGs, the NFκB signalling pathway, MKK-dependent AP-1 activation, JAK-STAT signalling pathway, the signal transmission of MHC Ⅰ and a series of DEGs including HSP90 driving NLRP3 to produce inflammatory factors (IL-1β, IL-8, TNFα, etc.) were possible important immune response pathways for turbot to V. anguillarum infection. Overall, our research has conducted a preliminary exploration of the immune mechanism of turbot in response to V. anguillarum infection.