>
Fa   |   Ar   |   En
   Molecular characterization and protective efficacy of silent information regulator 2A from Eimeria tenella  
   
نویسنده dong h. ,yang s. ,zhao q. ,han h. ,zhu s. ,zhu x. ,li c. ,wang z. ,xia w. ,men q. ,yang l. ,huang b.
منبع parasites and vectors - 2016 - دوره : 9 - شماره : 1
چکیده    Background: silent information regulator 2 (sir2) proteins are a family of nad + -dependent protein deacetylases that are considered potential targets for anti-parasitic agents. in this study,we cloned and characterized sir2a of the protozoan parasite eimeria tenella (etsir2a) and investigated its protective efficacy as a dna vaccine. methods: the etsir2a gene encoding 33.37 kda protein from e. tenella second-generation merozoites was cloned,and recombinant etsir2a protein (retsir2a) was produced in an escherichia coli expression system. the retsir2a was used to immunize rabbits. anti-retsir2a antibodies were used to determine the immunolocolization of etsir2a in the parasite by immunofluorescence assay (ifa). transcript and protein expression of etsir2a in different development stages of e. tenella were observed by quantitative real-time pcr (qpcr) and western blot (wb) analysis,respectively. the recombinant plasmid pcaggs-etsir2a was constructed and its efficacy against e. tenella infection in chickens was evaluated. results: qpcr and wb analysis revealed etsir2a expression was developmentally regulated at both the mrna and protein levels. etsir2a mrna levels were higher in unsporulated oocysts than at other developmental stages,including sporulated oocysts,sporozoites and second-generation merozoites. in contrast,etsir2a protein expression levels were highest in second-generation merozoites,moderate in unsporulated oocysts and sporulated oocysts and lowest in sporozoites. immunostaining with anti-retsir2a antibody indicated that etsir2a was mainly located in the cytoplasm of sporozoites and second-generation merozoites,and was strongly expressed during first stage schizogony. animal-challenge experiments demonstrated that immunization with pcaggs-etsir2a significantly increased average body-weight gain,and decreased mean lesion score and oocyst output in chickens. conclusions: these results suggest that etsir2a may play an important role in parasite cell survival and may be an effective candidate for the development of new vaccines against e. tenella infection in chickens. © 2016 the author(s).
کلیدواژه Coccidia; Eimeria; Recombinant plasmid; Silent information regulator 2
آدرس shanghai veterinary research institute,chinese academy of agricultural science,key laboratory of animal parasitology,ministry of agriculture,shanghai,200241, China, shanghai veterinary research institute,chinese academy of agricultural science,key laboratory of animal parasitology,ministry of agriculture,shanghai,200241,china,college of animal science and technology,yunnan agricultural university,kunming,650201, China, shanghai veterinary research institute,chinese academy of agricultural science,key laboratory of animal parasitology,ministry of agriculture,shanghai,200241, China, shanghai veterinary research institute,chinese academy of agricultural science,key laboratory of animal parasitology,ministry of agriculture,shanghai,200241, China, shanghai veterinary research institute,chinese academy of agricultural science,key laboratory of animal parasitology,ministry of agriculture,shanghai,200241, China, shanghai veterinary research institute,chinese academy of agricultural science,key laboratory of animal parasitology,ministry of agriculture,shanghai,200241, China, shanghai veterinary research institute,chinese academy of agricultural science,key laboratory of animal parasitology,ministry of agriculture,shanghai,200241, China, shanghai veterinary research institute,chinese academy of agricultural science,key laboratory of animal parasitology,ministry of agriculture,shanghai,200241, China, shanghai veterinary research institute,chinese academy of agricultural science,key laboratory of animal parasitology,ministry of agriculture,shanghai,200241, China, shanghai veterinary research institute,chinese academy of agricultural science,key laboratory of animal parasitology,ministry of agriculture,shanghai,200241, China, college of animal science and technology,yunnan agricultural university,kunming,650201, China, shanghai veterinary research institute,chinese academy of agricultural science,key laboratory of animal parasitology,ministry of agriculture,shanghai,200241,china,jiangsu co-innov. ctr. for prev. and control of important animal infectious diseases and zoonoses,yangzhou,225009, China
 
     
   
Authors
  
 
 

Copyright 2023
Islamic World Science Citation Center
All Rights Reserved