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Title of Journal: Parasitol Res

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Abbravation: Parasitology Research

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Springer-Verlag

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DOI

10.1007/s00120-005-0823-7

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1432-1955

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Silencing of xylose isomerase and cellulose syntha

Authors: Yousuf Aqeel Ruqaiyyah Siddiqui Naveed Ahmed Khan
Publish Date: 2012/12/28
Volume: 112, Issue: 3, Pages: 1221-1227
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Abstract

A key challenge in the successful treatment of Acanthamoeba infections is its ability to transform into a dormant cyst form that is resistant to physiological conditions and pharmacological therapies resulting in recurrent infections The carbohydrate linkage analysis of cyst walls of Acanthamoeba castellanii showed variously linked sugar residues including xylofuranose/xylopyranose glucopyranose mannopyranose and galactopyranose Here it is shown that exogenous xylose significantly reduced A castellanii differentiation in encystation assays P  005 using paired t test onetailed distribution Using small interfering RNA siRNA probes against xylose isomerase and cellulose synthase as well as specific inhibitors the findings revealed that xylose isomerase and cellulose synthase activities are crucial in the differentiation of A castellanii Inhibition of both enzymes using siRNA against xylose isomerase and cellulose synthase but not scrambled siRNA attenuated A castellanii metamorphosis as demonstrated by the arrest of encystation of A castellanii Neither inhibitor nor siRNA probes had any effect on the viability and extracellular proteolytic activities of A castellanii

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