Serum-stable RNA aptamers to an invariant surface domain of live African trypanosomes.

  • Homann M
  • Lorger M
  • Engstler M
 et al. 
  • 22


    Mendeley users who have this article in their library.
  • 32


    Citations of this article.


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.

Author-supplied keywords

  • Animals
  • Antibodies
  • Antibodies: immunology
  • Antibodies: therapeutic use
  • Aptamers, Nucleotide
  • Aptamers, Nucleotide: chemistry
  • Aptamers, Nucleotide: pharmacology
  • Base Sequence
  • Binding Sites
  • Cattle
  • Electrophoresis, Polyacrylamide Gel
  • Genetic Engineering
  • Genetic Engineering: methods
  • Humans
  • Nucleic Acid Conformation
  • RNA
  • RNA: chemistry
  • RNA: pharmacology
  • Trypanocidal Agents
  • Trypanocidal Agents: immunology
  • Trypanocidal Agents: pharmacology
  • Trypanosomiasis, African
  • Trypanosomiasis, African: drug therapy
  • Trypanosomiasis, African: genetics
  • Trypanosomiasis, African: immunology
  • Variant Surface Glycoproteins, Trypanosoma
  • Variant Surface Glycoproteins, Trypanosoma: drug e
  • Variant Surface Glycoproteins, Trypanosoma: geneti
  • Variant Surface Glycoproteins, Trypanosoma: immuno

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • Matthias Homann

  • Mihaela Lorger

  • Markus Engstler

  • Martin Zacharias

  • H Ulrich Göringer

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free