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Zeitschriftenartikel

Endogenous expression of a high-affinity pseudoknot RNA aptamer suppresses replication of HIV-1

MPG-Autoren

Chaloin,  Laurent
Max Planck Institute of Molecular Physiology, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons98724

Restle,  Tobias
Abt. III: Physikalische Biochemie, Max Planck Institute of Molecular Physiology, Max Planck Society;

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Zitation

Chaloin, L., Lehmann, M. J., Sczakiel, G., & Restle, T. (2002). Endogenous expression of a high-affinity pseudoknot RNA aptamer suppresses replication of HIV-1. Nucleic Acids Research, 30(18): 1, pp. 4001-4008. Retrieved from http://nar.oupjournals.org/cgi/reprint/30/18/4001.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0014-0E0D-0
Zusammenfassung
Aptamers, small oligonucleotides derived from an in vitro evolution process called SELEX, are promising therapeutic and diagnostic agents. Although very effective in vitro, only a few examples are available showing their potential in vivo. We have analyzed the effect of a well characterized pseudoknot RNA aptamer selected for tight binding to human immunodeficiency virus (HIV) type 1 reverse transcriptase on HIV replication. Transient intracellular expression of a chimeric RNA consisting of the human initiator tRNA(Met) (tRNA(Meti))/aptamer sequence in human 293T cells showed inhibition of HIV particle release by >75% when the cells were co-transfected with proviral HIV-1 DNA. Subsequent virus production of human T-lymphoid C8166 cells, infected with viral particles derived from co- transfected 293T cells, was again reduced by >75% as compared with the control. As the observed effects are additive, in this model for virus spread, the total reduction of HIV particle formation by transient intracellular expression of the pseudoknot RNA aptamer amounts to >95%. Low-dose HIV infection of human T cells stably expressing the aptamer did not show any virus replication over a period of 35 days. This is the first example of an RNA aptamer selected against a viral enzyme target to show powerful antiviral activity in HIV-1-permissive human T-lymphoid cell lines.