Abstract
Galectin plays an important role in host–parasite interactions. In this study, we identified a novel gene encoding galectin-10 (AcGal-10) from the cDNA library of Angiostrongylus cantonensis and characterized its biological role in the parasite. Sequence and phylogeny analysis showed that AcGal-10 is related to other galectin family members with the conserved loci (H84-D86-R88-V96-N98-W105-E108-R110). The mRNA level of AcGal-10 was expressed in reactive oxygen stress radicals. We have identified two proteins of A. cantonensis galectin-10 gene, one of which was reported (AcGAL10-W) and the others is AcGAL-10-M. In addition, recombinant AcGal-10 (rAcGal-10) was constructed into the pGEX-4T-1 plasmid, purified, and finally confirmed by SDS-PAGE and LC-MS. Hemagglutination assay showed that the minimum concentration of rAcGAL10-W and rAcGAL10-M required for the hemagglutination of BALB/c mice erythrocyte was 25 μg/mL, and the carbohydrate-binding ability showed no difference between rAcGAL10-W and rAcGAL10-M. The mRNA levels of AcGal-10 were indeed expressed higher after stimulation with H2O2 and recombinant A. cantonensis galectin-10. A mutation of AcGal-10 was also found, but there was no significant difference compared with the wild type. Furthermore, we also confirmed that recombinant AcGal-10 plays a role in the activation of the microglia. In conclusion, the report here showed that AcGal-10 may be an important molecule related to infection of A. cantonensis.
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This work was supported by the National Basic Research Program of China (2010CB530004) and National Nature Science Foundation of China (81271855, 81261160324).
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Ling-Hui Liu and Han-Jiang He contributed equally to this study.
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Liu, Lh., He, HJ., Lv, Zy. et al. The mRNA level of the galectin-10 of Angiostrongylus cantonensis induced by reactive oxygen stress. Parasitol Res 112, 933–943 (2013). https://doi.org/10.1007/s00436-012-3210-5
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DOI: https://doi.org/10.1007/s00436-012-3210-5