title: Identification and characterization of miR-31 potential targets by RNA-seq.
abstract: In our previous work, miR-31 displayed differential significant expression in Apostichopus japonicus sea cucumber with skin ulcer syndrome and modulated coelomocytes ROS production by targeting p105. To identify other promising targets ofmiR-31, 4 transcriptome libraries of coelomocytes, as well as 2 control libraries, were constructed frommiR-31 mimics (31 M) or AMO-miR-31 (31I) and injected into a sea cucumber at 12 and 24 h. A total of207,977 unigenes with an average length of 363 bp were assembled, in which17,204 distinct sequences (8.27% of the unigenes) were successfully matched with annotated protein sequences. Fragments per kilobase of transcript per million fragments mapped analysis indicated that 1325 unigenes displayed up-regulated expression profiles in the 31I-12 group and were depressed in the 31M - 12 group compared with the control group. A total of 1470 unigenes showed down-regulated expressions in 31I-12 and were induced in 31 M-12. Similarly, 2079 and 2098 unigenes were detected at 24 h post-injection. Among these unigenes, 36 unigenes (depressed expression in the 31 M group and induced in the 31I group) showed consistent expression patterns at 2 examined time points and were considered promising targets of miR-31. qPCR analysis confirmed that all 4 unigenes showed opposite expression profiles to miR-31 in cultured coelomocytes. Our present work provided a fast and feasible method of identifying miR-31 targets by transcriptome analysis. The results of this study would enhance our present understanding ofmiR-31 function insea cucumber immune regulation.
authors.affiliation: School of Marine Sciences, Ningbo University, PR China.
authors.forename: Sun
authors.initials: S
authors.lastname: Xueping
authors.affiliation: School of Marine Sciences, Ningbo University, PR China.
authors.forename: Lv
authors.initials: L
authors.lastname: Zhimeng
authors.affiliation: School of Marine Sciences, Ningbo University, PR China. Electronic address: lichenghua@nbu.edu.cn.
authors.forename: Li
authors.initials: L
authors.lastname: Chenghua
authors.affiliation: School of Marine Sciences, Ningbo University, PR China.
authors.forename: Lu
authors.initials: L
authors.lastname: Meng
authors.affiliation: School of Marine Sciences, Ningbo University, PR China.
authors.forename: Zhang
authors.initials: Z
authors.lastname: Pengjuan
authors.affiliation: School of Marine Sciences, Ningbo University, PR China. Electronic address: zhangweiwei1@nbu.edu.cn.
authors.forename: Zhang
authors.initials: Z
authors.lastname: Weiwei
mesh_terms: D000818:Animals; D035683:MicroRNAs / Q000235:genetics* / Q000378:metabolism; D060888:Real-Time Polymerase Chain Reaction; D017423:Sequence Analysis, RNA; D047528:Stichopus / Q000235:genetics* / Q000276:immunology* / Q000378:metabolism; D059467:Transcriptome
chemical_list: D035683:MicroRNAs
keywords: Apostichopus japonicus; Expression profile; RNA-Seq; miR-31