Publication: Degradation of human matrix metalloprotease-9 by secretory metalloproteases of angiostrongylus cantonensis infective stage
Issued Date
2012-11-05
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ISSN
01251562
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2-s2.0-84868122629
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Mahidol University
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SCOPUS
Bibliographic Citation
Southeast Asian Journal of Tropical Medicine and Public Health. Vol.43, No.5 (2012), 1105-1113
Suggested Citation
Poom Adisakwattana, Supaporn Nuamtanong, Pa thai Yenchitsomanus, Chalit Komalamisra, Ladda Meesuk Degradation of human matrix metalloprotease-9 by secretory metalloproteases of angiostrongylus cantonensis infective stage. Southeast Asian Journal of Tropical Medicine and Public Health. Vol.43, No.5 (2012), 1105-1113. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/14545
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Title
Degradation of human matrix metalloprotease-9 by secretory metalloproteases of angiostrongylus cantonensis infective stage
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Abstract
Angiostrongylus cantonensis infection is the major cause of eosinophilic meningitis. Successful migration and evasion of the immune system by infectivestage larvae (L3) rely heavily on secreted proteases, which activate human promatrix metalloprotease (MMP-9) into active MMP-9. This study showed that the proteases in excretory-secretory (ES) products of A. cantonensis third stage larvae degraded recombinant and native human proMMP-9 in a dose- and timedependent manner. Protease inhibitory assays showed that metalloproteases were the key enzymes involved in the degradation of human proMMP-9. To assess the effects of ES products on inflammation, ES products were incubated with THP-1 human monocytic cells, which showed induction of MMP-2 and not MMP-9 production. These results indicated that degradation of human MMP-9 was due to metalloproteases present in ES of A. cantonensis L3, which may be involved in suppressing the host's immune response to allow parasite migration to the host central nervous system.