Protective Efficacy of Rhomboid-Like Protein 3 As a Candidate Antigen Against in Chickens

Overview

Journal Front Microbiol

Specialty Microbiology

Date 2021 May 24

PMID 34025594

Citations 6

Authors

Chen Chen

Di Tian

Junzhi Su

Xiaoqian Liu

Muhammad Ali A Shah

Xiangrui Li

Lixin Xu

Ruofeng Yan

Xiaokai Song

Affiliations

Soon will be listed here.

Abstract

Avian coccidiosis brings tremendous economic loss to the poultry industry worldwide. The third generation vaccine, including subunit and DNA vaccines, exhibited promising developmental prospects. In a previous study, we found rhomboid-like protein 3 of (EmROM3) was involved in infections by species. However, the protective efficacy of EmROM3 against () remains unknown. In this study, chickens were intramuscularly immunized with the recombinant protein EmROM3 (rEmROM3) or pVAX1-EmROM3 to determine the EmROM3-induced immune response. The induced humoral immune response was determined by measuring serum IgG antibody levels in immunized chickens. The induced cellular immune response was detected by measuring the transcription level of immune related cytokines and the proportion of T cell subsets of the immunized chickens. Finally, the protective efficacy of the EmROM3 vaccine against was evaluated by immunization-challenge trials. Results revealed that the purified rEmROM3 reacted with chicken anti- serum. The recombinant plasmid of pVAX1-EmROM3 was transcribed and translated in the injected muscle from the vaccinated chickens. In experimental groups, the IgG titers, proportions of CD4 and CD8 T cells, and transcription level of splenic cytokines were significantly increased compared with the control groups. The immunization-challenge trial revealed that immunization with rEmROM3 or pVAX1-EmROM3 led to restored weight gain, alleviated enteric lesion, decreased oocyst output as well as the higher anticoccidial index (ACI), indicating partial protection against . These results indicate that EmROM3 is an effective candidate antigen for developing novel vaccines against infection by .

Citing Articles

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