%0 Journal Article %T Characterization of a novel aspartyl protease inhibitor from Haemonchus contortus %A Baojie Li %A Javaid Ali Gadahi %A Lixin Xu %A Muhammad Ehsan %A Ruofeng Yan %A Wenxiang Gao %A Xiangrui Li %A Xiaokai Song %A Zhenchao Zhang %J Archive of "Parasites & Vectors". %D 2017 %R 10.1186/s13071-017-2137-1 %X Aspartyl protease inhibitor (API) was thought to protect intestinal parasitic nematodes from their hostile proteolytic environment. Studies on Ostertagia ostertagi, Ascaris suum and Brugia malayi indicated that aspins might play roles in nematode infection. In a recent study, proteins differentially expressed between free-living third-stage larvae (L3) and activated L3 (xL3) of Haemonchus contortus were identified by 2D-DIGE. API was found downregulated in xL3 when compared with L3. However, there was no report about the functions of H. contortus API in the parasite-host interaction. In this study, the gene encoding API from H. contortus was cloned, expressed, and part of its biological characteristics were studied %K Haemonchus contortus %K Aspartyl protease inhibitor %K Localization %K Differential expression %K Inhibitory activity %K Induction of cytokines %U https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5395858/