ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2017, Vol. 48 ›› Issue (8): 1519-1528.doi: 10.11843/j.issn.0366-6964.2017.08.017

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Protein Profile Analyses of Protoscoleces in Echinococcus granulosus

WANG Zheng-rong1, BO Xin-wen1*, ZHANG Yan-yan1, MA Xun1,2, WANG Zhi-xin1,3, LU Ping-ping1,2   

  1. 1. State Key Labaratory of Sheep Genetic Improvement and Healthy Production/Institute of Animal Husbandry and Veterinary, Xinjiang Academy of Agricultural and Reclamation Sciences, Shihezi 832000, China;
    2. College of Animal Science and Technology, Shihezi University, Shihezi 832000, China;
    3. College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
  • Received:2017-03-24 Online:2017-08-23 Published:2017-08-23

Abstract:

The aim of this study was to explore the protein expression characteristics of protoscoleces, to reveal the main functional proteins and signaling pathways during the development of protoscoleces in Echinococcus granulusos, to lay the foundation for the mechanisms of development regulation of protoscoleces and screening target genes for vaccines and drugs. The LC-MS/MS technology was used to analyze the proteins expressed in the protoscoleces, then the proteins were analyzed based on GO, KOG and KEGG. Finally, the qRT-PCR and in situ hybridization were used to analyze the different expression and localization of the β-catenin which is the key gene of the Wnt signaling pathway. The results showed that the present study identified 7 172 peptides, 1 197 proteins, including multiple potential antigenic proteins, such as tetraspanin superfamily, 6-phosphogluconate dehydrogenase, enolase and epidermal antigenic proteins. Signal pathway analysis showed that 632 of these proteins involved in 276 pathways, such as Wnt, Notch, Hedgehog, NF-κB, cAMP and bile acid signaling pathways closely related to development of E. granulosus. The in situ hybridization analysis showed that the β-catenin was mainly distributed in the hooks and dispersed cells of the protoscoleces. Meanwhile, the relative transcription of β-catenin was gradually decreased during 0 to 10 days in vitro culture. In summary, this study analyzed the protein expression elements of protoscoleces, revealed the main regulatory pathways of protoscolex development, and provided a theoretical basis for the growth mechanisms of protoscoleces and effective prevention of hydatid disease.

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