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Actin-depolymerizing factor of second-generation merozoite in Eimeria tenella: clone, prokaryotic expression, and diclazuril-induced mRNA expression

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Abstract

Actin depolymerizing factor (ADF) is an essential actin-binding protein that plays a key role in the control of actin dynamics and actin-based motility processes in intracellular parasites. To determine the effects of diclazuril on ADF gene of second-generation merozoites (mz-ADF) mRNA expression in Eimeria tenella, mz-ADF gene was cloned by RT-PCR from extracted RNA in second-generation merozoite of E. tenella and successfully expressed by pET-28a vector in Escherichia coli BL21(DE3). Results showed that the full length of the cloned cDNA sequence of the mz-ADF gene is 476 bp including an ORF of 375 bp. The sequence has 100% homology with a published sequence of sporozoite stage E. tenella ADF mRNA (GenBank EF195234.1). The recombinant protein was induced to be expressed by 1 mM isopropyl β-d-1-thiogalactopyranoside in vitro. Sodium dodecyl sulfate–polyacrylamide gel electrophoresis analysis showed that 16.99 kDa fusion protein existed in solvable form. Compared with the infected/control group, mz-ADF mRNA expression level was downregulated by 63.86% in the infected/treatment group with the treatment of diclazuril. In conclusion, the data presented here indicate that mz-ADF gene participates in an important role in the invasion host of E. tenella. Downregulation of mz-ADF mRNA expression enrich the mechanism study of diclazuril on E. tenella.

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Acknowledgements

This study was financially supported by central grade public welfare fundamental science fund for scientific research institute (contract grant number: 2008JB09).

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Authors and Affiliations

  1. Key Laboratory of Veterinary Drug Safety Evaluation and Residues Research, Chinese Academy of Agricultural Sciences, Shanghai Veterinary Research Institute, 518 Ziyue Road, Minhang, Shanghai, 200241, People’s Republic of China

    Bian-hua Zhou, Fei-qun Xue, Xiao-yang Wang, Feng-kun Yang, Man-man Ban, Rui-xiang Xin & Cong-cong Wang

  2. College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, Hehan, 471003, People’s Republic of China

    Bian-hua Zhou & Hong-wei Wang

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  1. Bian-hua Zhou
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Correspondence to Fei-qun Xue.

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Zhou, Bh., Wang, Hw., Xue, Fq. et al. Actin-depolymerizing factor of second-generation merozoite in Eimeria tenella: clone, prokaryotic expression, and diclazuril-induced mRNA expression. Parasitol Res 106, 571–576 (2010). https://doi.org/10.1007/s00436-009-1699-z

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  • DOI: https://doi.org/10.1007/s00436-009-1699-z

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