Project description:In previous studies, we employed multiple behavior assays, including propensity to feed, simulated trawl capture and escape response, to prove the presence of bold and shy personality in olive flounder. However, the molecular mechanism of the different personality has not been elucidated. In the present study, the transcriptomic profiles of the hindbrain from flounder with distinct personalities were compared. A total of 144 differently expressed genes were identified, including 74 up-regulated and 70 downregulated genes. Genes involved in hypoxia stress were detected in SP flounder, accompanied by down-regulation of ribosomal RNA synthesis. In addition, genes related to calcium signaling pathway, including endothelin, b-Fos, c-Fos and c-Jun were up-regulated in SP flounder. Furthermore, personality-related genes, including UI, CCK, c-Fos showed a significantly higher level in SP flounder compared with BP flounder. GO enrichment analysis indicated that the GO categories “the tight junction pathway” and “lipid transport or localization pathway” are enriched in SP flounder, suggesting that the central nervous system homeostasis would be compromised. Finally, a simple and scalable DNA methylation profiling allows for methylation analysis for different genes. The results found that part of gene expression is negatively related to methylation of promoter. Altogether, identification of the related genes in flounder with different personalities will shed new light to improve critical industry issues related to stress and increase aquaculture production of flounder.
Project description:The 987 probes (Japanese flounder conserved miRNAs and candidates, fish conserved miRNAs, and contro) were hybridized with two stages during Japanese flounder metamorphosis by miRNA microarray. We validated 92 miRNAs using miRNA microarray in the 17 dph and 29 dph of Japanese flounder development, and obtained 66 differertially expressed miRNAs by comparison miRNA expression patterns of the two stages. These results indicate that miRNAs might play key roles in regulating gene expression during Japanese flounder metamorphosis.
Project description:Many known miRNAs in fish come from zebrafish and fugu whose genome sequence data are available. The Japanese flounder undergoes typical metamorphosis which is characterized by major morphological, functional, and behavioral changes during growth due to this metamorphosis from larva to juvenile. Metamorphosis is a biological process by which an animal physically develops after birth or hatching, involving a conspicuous and relatively abrupt change in the animal's body structure through cell growth and differentiation. Here, the high-throughput sequencing was adopted to identify the miRNAs during metamorphosis in the Japanese flounder. We found abundant microRNAs during metamorphosis in the Japanese flounder.
Project description:The 987 probes (Japanese flounder conserved miRNAs and candidates, fish conserved miRNAs, and contro) were hybridized with two stages during Japanese flounder metamorphosis by miRNA microarray. We validated 92 miRNAs using miRNA microarray in the 17 dph and 29 dph of Japanese flounder development, and obtained 66 differertially expressed miRNAs by comparison miRNA expression patterns of the two stages. These results indicate that miRNAs might play key roles in regulating gene expression during Japanese flounder metamorphosis. Using miRNA microarray, the flounder conserved miRNAs and candidates were identified, and 92 conserved miRNAs were detected in the 17 dph and 29 dph during metamorphosis. Meanwhile, 66 conserved miRNAs were differertially expressed by comparison miRNA expression patterns of the two stages. We further identified flounder miRNAs during metamorphosis.
