Transcriptomic response to water accommodated fraction of crude oil exposure in the gill of Japanese flounder, Paralichthys olivaceus
2016
Zhu, Lin | Qu, Keming | Xia, Bin | Sun, Xuemei | Chen, Bijuan
Illumina-based RNA-seq was used to determine the short-term transcriptomic responses of Paralichthys olivaceus gill to an environmentally relevant level of water accommodated fraction (WAF) of crude oil. 213,979 transcripts and 128,482 unigenes were obtained. Differential expression analysis revealed that 1641 and 2142 genes were significantly up- and down-regulated. Enrichment analysis identified a set of GO terms and putative pathways involved in the response of P. olivaceus to WAF exposure. Analysis of the transcripts revealed the effective protective mechanisms of P. olivaceus to reduce the toxic effects of WAF. Moreover, WAF exposure induced the metabolism of energy substrates, and downstream pathway genes were modified to provide protection against toxic damage. Transcripts analysis demonstrated that the genes involved in circadian rhythm signaling were regulated in gills of P. olivaceus exposed to WAF. These results provide insights into the mechanisms of WAF-induced toxicity in fishes and into the WAF-sensitive biomarkers in P. olivaceus.
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