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Article Open Access

Construction of a cDNA library and preliminary analysis of the expressed sequence tags of the earthworm Eisenia fetida (Savigny, 1826)

  • Authors:
    • Chang Liu
    • Xuan Wang
    • Jiu‑Bo Tian
    • Pei‑Yuan Ma
    • Fan‑Xiu Meng
    • Qi Zhang
    • Bao‑Feng Yu
    • Rui Guo
    • Zhi‑Zhen Liu
    • Hai‑Long Wang
    • Jun Xie
    • Niu‑Liang Cheng
    • Jian‑Hua Wang
    • Bo Niu
    • Gong‑Qin Sun
  • View Affiliations / Copyright

    Affiliations: Department of Biochemistry and Molecular Biology, Shanxi Medical University, Taiyuan, Shanxi 030001, P.R. China, Department of Biotechnology, Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing 100020, P.R. China
    Copyright: © Liu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 2537-2550
    |
    Published online on: February 5, 2019
       https://doi.org/10.3892/mmr.2019.9938
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Abstract

Earthworms are useful indicator organisms of soil health and Eisenia fetida have been extensively used as test organisms in ecotoxicological studies. In order to gain insight into the gene expression profiles associated with physiological functions of earthworms, a full‑length enriched cDNA library of the Eisenia fetida genome was successfully constructed using Switching Mechanism at 5'End of RNA Template technology. Construction of a cDNA library and analysis of Expressed Sequence Tags (ESTs) are efficient approaches for collecting genomic information and identifying genes important for a given biological process. Furthermore, analysis of the expression abundance of ESTs was performed with the aim of providing genetic and transcriptomic information on the development and regenerative process of earthworms. Phrep and Crossmatch were used to process EST data and a total of 1,140 high‑quality EST sequences were determined by sequencing random cDNA clones from the library. Clustering analysis of sequences revealed a total of 593 unique sequences including 225 contiguous and 368 singleton sequences. Basic Local Alignment Search Tool analysis against the Kyoto Encyclopedia of Genes and Genomes database resulted in 593 significant hits (P‑value <1x10‑8), of which 168 were annotated through Gene Ontology analysis. The STRING database was used to determine relationships among the 168 ESTs, identifying associated genes involved in protein‑protein interactions and gene expression regulation. Based on nucleic acid and protein sequence homology, the mutual relationships between 287 genes could be obtained, which identified a portion of the ESTs as known genes. The present study reports on the construction of a high‑quality cDNA library representative of adult earthworms, on a preliminary analysis of ESTs and on a putative functional analysis of ESTs. The present study is expected to enhance our understanding of the molecular basis underlying the biological development of earthworms.
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Copy and paste a formatted citation
Spandidos Publications style
Liu C, Wang X, Tian JB, Ma PY, Meng FX, Zhang Q, Yu BF, Guo R, Liu ZZ, Wang HL, Wang HL, et al: Construction of a cDNA library and preliminary analysis of the expressed sequence tags of the earthworm Eisenia fetida (Savigny, 1826). Mol Med Rep 19: 2537-2550, 2019.
APA
Liu, C., Wang, X., Tian, J., Ma, P., Meng, F., Zhang, Q. ... Sun, G. (2019). Construction of a cDNA library and preliminary analysis of the expressed sequence tags of the earthworm Eisenia fetida (Savigny, 1826). Molecular Medicine Reports, 19, 2537-2550. https://doi.org/10.3892/mmr.2019.9938
MLA
Liu, C., Wang, X., Tian, J., Ma, P., Meng, F., Zhang, Q., Yu, B., Guo, R., Liu, Z., Wang, H., Xie, J., Cheng, N., Wang, J., Niu, B., Sun, G."Construction of a cDNA library and preliminary analysis of the expressed sequence tags of the earthworm Eisenia fetida (Savigny, 1826)". Molecular Medicine Reports 19.4 (2019): 2537-2550.
Chicago
Liu, C., Wang, X., Tian, J., Ma, P., Meng, F., Zhang, Q., Yu, B., Guo, R., Liu, Z., Wang, H., Xie, J., Cheng, N., Wang, J., Niu, B., Sun, G."Construction of a cDNA library and preliminary analysis of the expressed sequence tags of the earthworm Eisenia fetida (Savigny, 1826)". Molecular Medicine Reports 19, no. 4 (2019): 2537-2550. https://doi.org/10.3892/mmr.2019.9938
Copy and paste a formatted citation
x
Spandidos Publications style
Liu C, Wang X, Tian JB, Ma PY, Meng FX, Zhang Q, Yu BF, Guo R, Liu ZZ, Wang HL, Wang HL, et al: Construction of a cDNA library and preliminary analysis of the expressed sequence tags of the earthworm Eisenia fetida (Savigny, 1826). Mol Med Rep 19: 2537-2550, 2019.
APA
Liu, C., Wang, X., Tian, J., Ma, P., Meng, F., Zhang, Q. ... Sun, G. (2019). Construction of a cDNA library and preliminary analysis of the expressed sequence tags of the earthworm Eisenia fetida (Savigny, 1826). Molecular Medicine Reports, 19, 2537-2550. https://doi.org/10.3892/mmr.2019.9938
MLA
Liu, C., Wang, X., Tian, J., Ma, P., Meng, F., Zhang, Q., Yu, B., Guo, R., Liu, Z., Wang, H., Xie, J., Cheng, N., Wang, J., Niu, B., Sun, G."Construction of a cDNA library and preliminary analysis of the expressed sequence tags of the earthworm Eisenia fetida (Savigny, 1826)". Molecular Medicine Reports 19.4 (2019): 2537-2550.
Chicago
Liu, C., Wang, X., Tian, J., Ma, P., Meng, F., Zhang, Q., Yu, B., Guo, R., Liu, Z., Wang, H., Xie, J., Cheng, N., Wang, J., Niu, B., Sun, G."Construction of a cDNA library and preliminary analysis of the expressed sequence tags of the earthworm Eisenia fetida (Savigny, 1826)". Molecular Medicine Reports 19, no. 4 (2019): 2537-2550. https://doi.org/10.3892/mmr.2019.9938
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