De novo assembly and characterization of the transcriptome of the pancreatic fluke Eurytrema pancreaticum (trematoda: Dicrocoeliidae) using Illumina paired-end sequencing.
Eurytrema pancreaticum is one of the most common trematodes living in the pancreatic and bile ducts of ruminants and also occasionally infects humans, causing eurytremiasis. In spite of its economic and medical importance, very little is known about the genomic resources of this parasite. Herein, we performed de novo sequencing, assembly and characterization of the transcriptome of adult E. pancreaticum. Approximately 36.4 million high-quality clean reads were obtained, and the length of the transcript contigs ranged from 66 to 19,968 nt with mean length of 479 nt and N50 length of 1094 nt, and then 23,573 unigenes were assembled. Of these unigenes, 15,353 (65.1%) were annotated by blast searches against the NCBI non-redundant protein database. Among these, 15,267 (64.8%), 2732 (11.6%) and 10,354 (43.9%) of the unigenes had significant similarity with proteins in the NR, NT and Swiss-Prot databases, respectively. 5510 (23.4%) and 4567 (19.4%) unigenes were assigned to GO and COG, respectively. 8886 (37.7%) unigenes were identified and mapped onto 254 pathways in the KEGG Pathway database. Furthermore, we found that 105 (1.18%) unigenes were related to pancreatic secretion and 61 (0.7%) to pancreatic cancer. The present study represents the first transcriptome of any members of the family Dicrocoeliidae, which has little genomic information available in the public databases. The novel transcriptome of E. pancreaticum should provide a useful resource for designing new strategies against pancreatic flukes and other trematodes of human and animal health significance.
State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu Province 730046, PR China.
Guo-Hua
GH
Liu
State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu Province 730046, PR China.
Min-Jun
MJ
Xu
State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu Province 730046, PR China.
Hui-Qun
HQ
Song
College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province, PR China.
Chun-Ren
CR
Wang
State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu Province 730046, PR China; College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, Heilongjiang Province, PR China. Electronic address: zhuxingquan@caas.cn.
Xing-Quan
XQ
Zhu
D000818:Animals; D030562:Databases, Protein; D004012:Dicrocoeliidae / Q000235:genetics* / Q000472:pathogenicity; D059014:High-Throughput Nucleotide Sequencing; D006801:Humans; D018895:Microsatellite Repeats; D058977:Molecular Sequence Annotation; D010190:Pancreatic Neoplasms / Q000235:genetics / Q000469:parasitology; D020641:Polymorphism, Single Nucleotide; D059467:Transcriptome
De novo; Eurytrema pancreaticum; Next-generation sequencing; Transcriptome