STRONGYLOIDES-STERCORALIS - IDENTIFICATION OF A PROTEASE THAT FACILITATES PENETRATION OF SKIN BY THE INFECTIVE LARVAE

被引:107
作者
MCKERROW, JH
BRINDLEY, P
BROWN, M
GAM, AA
STAUNTON, C
NEVA, FA
机构
[1] NIH,PARASIT DIS LAB,BETHESDA,MD 20892
[2] CORNELL UNIV,MED CTR,COLL MED,NEW YORK,NY 10021
关键词
Invasion; Larva; Protease; Skin; Strongyloides;
D O I
10.1016/0014-4894(90)90094-S
中图分类号
R38 [医学寄生虫学]; Q [生物科学];
学科分类号
07 ; 0710 ; 09 ; 100103 ;
摘要
Host invasion and tissue migration of several helminths have been linked to the expression and release of parasite-derived proteases. One of the most remarkable examples of tissue migration is that of larvae of the nematode parasite Strongyloides stercoralis, which can move through tissue at speeds of up to 10 cm per hour. We have shown the Strongyloides L3 larvae secrete a potent histolytic metalloprotease to facilitate their rapid migration. This protease has elastase activity and catalyzes the degradation of a model of dermal extracellular matrix. The importance of this enzyme in the pathogenesis of strongyloidiasis is underscored by the observation that invasion by larvae of skin vitro is prevented by metalloprotease inhibitors. These results substantiate the role of proteases as virulence factors in strongyloidiasis, as well as other related parasitic infections, and suggest new approaches to therapy. © 1990.
引用
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页码:134 / 143
页数:10
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