ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2019, Vol. 50 ›› Issue (10): 2088-2096.doi: 10.11843/j.issn.0366-6964.2019.10.015

• PREVENTIVE VETERINARY MEDICINE • Previous Articles     Next Articles

Effects of Host Glyceraldehyde-3-phosphate Dehydrogenase on Eimeria tenella Sporozoites Invasion of Cells

WANG Lu1, ZHU Shunhai1, ZHAO Qiping1, HUANG Bing1, HAN Hongyu1, LIU Guiling1,2, LI Zhihang1,2, ZHAO Huanzhi1, DONG Hui1*   

  1. 1. Key Laboratory of Animal Parasitology of Ministry of Agriculture, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Shanghai 200241, China;
    2. College of Life and Environment Sciences, Shanghai Normal University, Shanghai 200234, China
  • Received:2019-05-05 Online:2019-10-23 Published:2019-10-23

Abstract: At present, the mechanism of how the host cell responds to Eimeria tenella infection is highly limited. In our previous study, isobaric tags for relative and absolute quantitation were used to study the proteomics changes in host cells after infection with E. tenella sporozoites. In this study, one of the up-regulated proteins, glyceraldehyde-3-phosphate dehydrogenase (GAPDH), was selected to study its effect on the invasion of Eimeria tenella sporozoites. Gallus gallus GAPDH gene was cloned, and the prokaryotic recombinant expression plasmid pGEX-4T-1-GAPDH was constructed. The recombinant GAPDH protein (rGAPDH) was expressed and identified by Western blot. Expression of GAPDH in DF-1 cells during E. tenella sporozoites infection was detected by q-PCR, Western blot and immunohistochemistry. The effect of GAPDH polyclonal antibody on sporozoites invasion of cells was detected by antibody inhibition assay. Results were as follows:A 1 123-bp GAPDH was cloned and the rGAPDH was recognized as a~61.7 kDa protein by Western blot. The expression of GAPDH in E. tenella sporozoites-infected DF-1 cells were up-regulated by q-PCR and immunohistochemistry detection. The antibody inhibition assay showed that antibodies against GAPDH at 50, 100, 200, 300 and 400 μg·mL-1 could significantly inhibit sporozoite invasion compared with the same does of normal rabbit IgG. These results show that E. tenella sporozoites infection could induce the up-regulation of host GAPDH, and host GAPDH plays an active role in Eimeria invasion.

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