Project description:Cryptocaryonosis caused by Cryptocaryon irritans is one of the major diseases of large yellow croaker (Larimichthys crocea), which lead to massive economic losses annually. The pathogenesis for cryptocaryonosis has been researched by a series of transcriptome studies under different infection conditions. However, little is known about the roles of tissue-specifically expressed genes during the infection of C. irritans. In this study, we analyzed the tissue-specific expression of transcripts in the major infection organs including gill and skin of L. crocea after C. irritans infection. we constructed transcriptome expression profiles of L. crocea gill and skin, including 23,172 protein-coding genes and 7,503 long noncoding RNAs (lncRNAs). By comparing transcriptome data from different tissues of L. crocea, we observed tissue specificity of transcripts in gill and skin, including 3,003 protein coding genes and 639 lncRNAs. A total of 212 of the protein coding genes were involved in immune system. Further analysis revealed that the tissue-specific DEGs in gill and skin were mainly involved in HIF-1 signaling pathway and Complement and coagulation cascades, respectively. In addition, 9 non-tissue-specific hub genes, including CCL4, DDIT4, LEP, ect., which are highly associated with C. irritans infection were identified. To our knowledge, this is the first comparative transcriptome analysis of gill and skin after C. irritans infection. Our results are helpful to understand the molecular mechanism of pathogenesis for cryptocaryonosis, espec-tissue specificity of protein-coding genes and lncRNAs involved in immune regulation.
