Ascaris suum enolase is a potential vaccine candidate against ascariasis

作者：Chen, Ning; Yuan, Zi-Guo^*; Xu, Min-Jun; Zhou, Dong-Hui; Zhang, Xiu-Xiang; Zhang, Yan-Zhong; Wang, Xiao-Wei; Yan, Chao; Lin, Rui-Qing; Zhu, Xing-Quan

来源：Vaccine, 2012, 30(23): 3478-3482.

DOI：10.1016/j.vaccine.2012.02.075

• Ascaris suum
• Enolase
• Eukaryotic expression
• Protective immunity
• Vaccine

Ascariasis caused by Ascaris is the most common parasite problem in humans and pigs worldwide. No vaccines are available for the prevention of Ascaris infections. In the present study, the gene encoding Ascaris suum enolase (As-enol-1) was amplified, cloned and sequenced. Amino acid sequence alignment indicated that As-enol-1 was highly conserved between different nematodes and shared the highest identity (87%) with enolase from Anisakis simplex s.l. The recombinant pVAX-Enol was successfully expressed in Marc-145 cells. The ability of the pVAX-Enol for inducing immune protective responses against challenge infection with A. suum L3 was evaluated in Kunming mice. The immune response was evaluated by lymphoproliferative assay, cytokine and antibody measurements, and the reduction rate of recovery larvae. The results showed that the mice immunized with pVAX-Enol developed a high level of specific antibody responses against A. suum, a strong lymphoproliferative response, and significant levels of IFN-gamma, IL-2, IL-4 and IL-10 production, compared with the other groups immunized with empty plasmid or blank controls, respectively. There was a 61.13% reduction (P < 0.05) in larvae recovery compared with that in the blank control group. Our data indicated that A. suum enolase is a potential vaccine candidate against A. suum infection.

• 出版日期2012-5-14
• 单位深圳市药品检验研究院; 中国农业科学院兰州兽医研究所; 黑龙江八一农垦大学; 华南农业大学; 家畜疫病病原生物学国家重点实验室; 徐州医科大学; 云南农业大学