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Vet Parasitol. 2014 Sep 15;205(1-2):62-9. doi: 10.1016/j.vetpar.2014.06.029. Epub 2014 Jul 7.

Pichia pastoris expressed EtMic2 protein as a potential vaccine against chicken coccidiosis.

Author information

1
Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Taian City 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City 271018, Shandong Province, China.
2
Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Taian City 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City 271018, Shandong Province, China; Department of Basic Veterinary Medicine, College of Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Taian City 271018, Shandong Province, China.
3
Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Shandong Agricultural University, 61 Daizong Street, Taian City 271018, Shandong Province, China; Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, Shandong Agricultural University, 61 Daizong Street, Taian City 271018, Shandong Province, China. Electronic address: xmzhao66@163.com.

Abstract

Chicken coccidiosis caused by Eimeria species leads to tremendous economic losses to the avian industry worldwide. Identification of parasite life cycle specific antigens is a critical step in recombinant protein vaccine development against Eimeria infections. In the present study, we amplified and cloned the microneme-2 (EtMIC2) gene from Eimeria tenella wild type strain SD-01, and expressed the EtMic2 protein using Pichia pastoris and Escherichia coli expression systems, respectively. The EtMic2 proteins expressed by P. pastoris and E. coli were used as vaccines to immunize chickens and their protective efficacies were compared and evaluated. The results indicated that both P. pastoris and E. coli expressed EtMic2 proteins exhibited good immunogenicity in stimulating host immune responses and the Pichia expressed EtMic2 provided better protection than the E. coli expressed EtMic2 did by significantly increasing growth rate, inducing high specific antibody response, reducing the oocyst output and cecal lesions. Particularly, the Pichia expressed EtMic2 protein exhibited much better ability in inducing cell mediated immune response than the E. coli expressed EtMic2.

KEYWORDS:

Eimeria tenella; EtMic2; Pichia pastoris; Vaccine

PMID:
25047705
DOI:
10.1016/j.vetpar.2014.06.029
[Indexed for MEDLINE]
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