期刊
PARASITOLOGY RESEARCH
卷 97, 期 5, 页码 386-389出版社
SPRINGER
DOI: 10.1007/s00436-005-1461-0
关键词
Blastocystis; immunoglobulin A; mucosal; proteinases; protozoa
类别
Microbial immunoglobulin A (IgA) proteases cleave human secretory IgA, promoting the mucosal adhesion of pathogens. To investigate if the enteric protozoan Blastocystis degrades human secretory IgA, cell lysate and conditioned medium from two species were exposed to immunoglobulin A. Secretory IgA was cleaved by both cell lysate and conditioned medium with mainly cysteine proteinase activity in B. hominis B isolate and aspartic proteinase activity in B. ratii WR1 isolate. These findings suggest that Blastocystis proteases may play a role in parasite survival in vivo.
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