Abstract:
:African trypanosomes are extracellular blood parasites that cause sleeping sickness in humans and Nagana in cattle. The therapeutics used to control and treat these diseases are very ineffective and thus, the development of new drugs is urgently needed. We have previously suggested to use trypanosome-specific RNA aptamers as tools for the development of novel trypanocidal compounds. Here, we report the selection of a 2'-NH(2)-modified RNA aptamer that binds to live trypanosomes with an affinity of 70 +/- 15 nM. The aptamer adopts a stable G-quartet structure and has a half-life in human serum of > 30 h. RNA binding is restricted to the flagellar attachment zone, located between the cell body and the flagellum of the parasite. We demonstrate that antigen-tagged preparations of the aptamer can bind to live trypanosomes and that they can be used to re-direct immunoglobulins to the parasite surface.
journal_name
Comb Chem High Throughput Screenjournal_title
Combinatorial chemistry & high throughput screeningauthors
Homann M,Lorger M,Engstler M,Zacharias M,Göringer HUdoi
10.2174/138620706777935324subject
Has Abstractpub_date
2006-08-01 00:00:00pages
491-9issue
7eissn
1386-2073issn
1875-5402journal_volume
9pub_type
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journal_title:Combinatorial chemistry & high throughput screening
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