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  • Title: Molecular characterization of 60S ribosomal protein L12 of E. tenella.
    Author: Liang S, Zhu S, Zhao Q, Yu Y, Dong H, Wang Q, Wang H, Yu S, Huang B, Han H.
    Journal: Exp Parasitol; 2020 Oct; 217():107963. PubMed ID: 32781092.
    Abstract:
    This study analyzed the large-subunit (60S) ribosomal protein L12 of Eimeria tenella (Et60s-RPL12). A full-length cDNA was cloned, and the recombinant protein was expressed in E. coli BL21 and inoculated in rabbits to produce the polyclonal antibody. Quantitative real-time polymerase chain reaction and western blotting were used to analyze the transcription levels of Et60s-RPL12 and translation levels in different developmental stages of E. tenella. The results showed that the mRNA transcription level of Et60s-RPL12 was highest in second-generation merozoites, whereas the translation level was highest in unsporulated oocysts. Indirect immunofluorescence showed that Et60s-RPL12 was localized to the anterior region and surface of sporozoites, except for the two refractile bodies. As the invasion of DF-1 cells progressed, fluorescence intensity was increased, and Et60s-RPL12 was localized to the parasitophorous vacuole membrane (PVM). The secretion assay results using staurosporine indicated that this protein was secreted, but not from micronemes. The role of Et60s-RPL12 in invasion was evaluated in vitro. The results of the invasion assay showed that polyclonal antibody inhibited host cell invasion by the parasite, which reached about 12%. However, the rate of invasion was not correlated with the concentration of IgG.
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