High-throughput Giardia lamblia viability assay using bioluminescent ATP content measurements.

Abstract:

:The human pathogen Giardia lamblia is an anaerobic protozoan parasite that causes giardiasis, one of the most common diarrheal diseases worldwide. Although several drugs are available for the treatment of giardiasis, drug resistance has been reported and is likely to increase, and recurrent infections are common. The search for new drugs that can overcome the drug-resistant strains of Giardia is an unmet medical need. New drug screen methods can facilitate the drug discovery process and aid with the identification of new drug targets. Using a bioluminescent ATP content assay, we have developed a phenotypic drug screen method to identify compounds that act against the actively growing trophozoite stage of the parasite. This assay is homogeneous, robust, and suitable for high-throughput screening of large compound collections. A screen of 4,096 pharmacologically active small molecules and approved drugs revealed 43 compounds with selective anti-Giardia properties, including 32 previously reported and 11 novel anti-Giardia agents. The most potent novel compound was fumagillin, which showed 50% inhibitory concentrations of 10 nM against the WB isolate and 2 nM against the GS isolate.

authors

Chen CZ,Kulakova L,Southall N,Marugan JJ,Galkin A,Austin CP,Herzberg O,Zheng W

doi

10.1128/AAC.00618-10

subject

Has Abstract

pub_date

2011-02-01 00:00:00

pages

667-75

issue

2

eissn

0066-4804

issn

1098-6596

pii

AAC.00618-10

journal_volume

55

pub_type

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