Understanding microRNAs regulation in heat shock response in the sea cucumber Apostichopus japonicus
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ABSTRACT: In this study, we sought to determine the expression profiles of miRNAs under HS in A. japonicus by using HiSeq techinique. Nine miRNA libraries of sea cucumbers (Control: C1, C2, C3; HS 6h: 6h1, 6h2, 6h3; HS 48h: 48h1, 48h2, 48h3 ) were sequenced respectively. We highlighted differentially expressed miRNAs among HS groups, many of which were invovled of immunity process and disease regulation.
Project description:Sea cucumbers (Holothuroidea; Echinodermata) cycle annually between aestivation, when water temperature is above about 25°C in the summer, and active life, when temperature is below about 18°C. We used RNA-Seq to determine gene expression profiles of respiratory tree tissue of A. japonicus during non-aestivation (NA), deep-aestivation (DA), and arousal from aestivation (AA).
Project description:Sea cucumbers (Holothuroidea; Echinodermata) have the capacity to regenerate lost tissues and organs.We used RNA-Seq to determine gene expression profiles associated with intestinal regeneration in A. japonicus at 3, 7, 14 and 21 days post evisceration (dpe)
Project description:Sea cucumbers (Holothuroidea; Echinodermata) cycle annually between aestivation, when water temperature is above about 25°C in the summer, and active life, when temperature is below about 18°C. We used RNA-Seq to determine gene expression profiles of respiratory tree tissue of A. japonicus during non-aestivation (NA), deep-aestivation (DA), and arousal from aestivation (AA). At least 15 individuals per stage, respiratory tree at NA, DA and AA stages were used for our experiments.
Project description:Sea cucumbers (Holothuroidea; Echinodermata) have the capacity to regenerate lost tissues and organs.We used RNA-Seq to determine gene expression profiles associated with intestinal regeneration in A. japonicus at 3, 7, 14 and 21 days post evisceration (dpe) At least 15 individuals per stage, at 3, 7, 14 and 21 days post evisceration (dpe) were used for our experiments.
Project description:The high-throughput RNA-seq was applied under both 26°C and 30°C heat stress in Apostichopus japonicus, which revealed characterization of gene expression at sub-lethal and lethal limit temperature. The results will help to better understand the characteristics of heat shock response in A. japonicus.
Project description:The present study identified and characterized miRNAs, which may play a major role in stress resistance. we applied high-throughput sequencing to investigate the alterations of miRNAs expression of sea cucumber under hypoxia stress(DO2_1,DO2_2,DO2_3),slight hypoxia stress(DO4_1,DO4_2,DO4_3) and normal condition(DO8_1,DO8_2,DO8_3). These results will provide a basis for future studies of miRNA regulation in sea cucumbers under hypoxia stress.
Project description:Sea cucumber, Apostichopus japonicus is a very important species for aquaculture, and its behavior and physiology can respond to the initial change in salinity. It is important to understand the molecular responses of A. japonicus when exposed to ambient changes in salinity In this study, RNA-seq provided a general overview of the gene expression profiles of the intestine of A. japonicus exposed to high salinity (SD40), normal salinity (SD30) and low salinity (SD20) environment.
Project description:The sea cucumber Apostichopus japonicus withstands high water temperatures in the summer by suppressing metabolic rate and entering a state of aestivation. We hypothesized that changes in the expression of miRNAs could provide important post-transcriptional regulation of gene expression during hypometabolism via control over mRNA translation. The present study analyzed profiles of miRNA expression in the sea cucumber respiratory tree using Solexa deep sequencing technology. We identified 279 sea cucumber miRNAs, including 15 novel miRNAs specific to sea cucumber. Animals sampled during deep aestivation (DA; after at least 15 days of continuous torpor) were compared with animals from a non-aestivation (NA) state (animals that had passed through aestivation and returned to an active state). We identified 30 differentially expressed miRNAs ([RPM (reads per million) >10, |FC| (|fold change|) ≥1, FDR (false discovery rate) <0.01]) during aestivation, which were validated by two other miRNA profiling methods: miRNA microarray and real-time PCR. Among the most prominent miRNA species, miR-124, miR-124-3p, miR-79, miR-9 and miR-2010 were significantly over-expressed during deep aestivation compared with non-aestivation animals, suggesting that these miRNAs may play important roles in metabolic rate suppression during aestivation. analyze the global profile of small RNAs in non-aestivation (NA) and deep aestivation (DA) sea cucumbers' respiratory tree using Solexa sequencing technology