Molecular characterization and analysis of the drug resistance-associated protein phosphoglycerate kinase of Eimeria tenella

文献类型： 外文期刊

第一作者： Yu, Yu

作者： Yu, Yu;Huang, Wenhao;Zhao, Qiping;Zhu, Shunhai;Dong, Hui;Han, Hongyu

作者机构：

关键词： drug resistance; Eimeria tenella; phosphoglycerate kinase

期刊名称：PARASITOLOGY （ 影响因子：2.4； 五年影响因子：2.3 ）

ISSN： 0031-1820

年卷期： 2024 年 151 卷 12 期

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收录情况： SCI

摘要： Coccidiosis is a parasitic disease caused by Eimeria spp., and the emergence of drug resistance has seriously affected the control of the disease. Using RNA-seq, we previously found that phosphoglycerate kinase of Eimeria tenella (EtPGK) was differentially downregulated in diclazuril-resistant (DZR) and maduramicin-resistant (MRR) strains compared with drug-sensitive (DS) strain. In this study, we further analysed the characteristics and functions of Et PGK to find the possible mechanism of drug resistance of E. tenella. Quantitative real-time PCR (qRTPCR) and western blot found that Et PGK was highly expressed in sporulated oocysts, followed by sporozoites and second-generation merozoites of E. tenella. Indirect immunofluorescence localization showed that Et PGK was located mainly in the cytoplasm and on the surface of the parasites. Invasion inhibition assays showed that anti-rEtPGK antibody significantly inhibited the invasion of parasites. Further studies using qRT-PCR and western blot found that the transcription and translation levels of Et PGK were downregulated in both resistant (DZR and MRR) strains compared with the DS strain, and the transcription level correlated negatively with the drug concentration. The enzyme activity assay revealed that Et PGK enzyme activity was decreased in the DZR strain compared with the DS strain. qRT-PCR revealed that the mRNA transcription level of Et PGK was significantly downregulated in the field DZR strain and salinomycin-resistant strain compared with the DS strain. These results suggested that Et PGK has other important roles that are separate and distinct from its function in glycolysis, and it might be involved in the development of drug resistance of E. tenella.

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