An acridine-linked oligodeoxynucleotide targeted to the common 5' end of trypanosome mRNAs kills cultured parasites
Identifieur interne : 000414 ( France/Analysis ); précédent : 000413; suivant : 000415An acridine-linked oligodeoxynucleotide targeted to the common 5' end of trypanosome mRNAs kills cultured parasites
Auteurs : P. Verspieren ; A. W. C. A. Cornelissen [Allemagne] ; N. T. Thuong ; C. Hélène ; J. J. Toulmé [France]Source :
- Gene [ 0378-1119 ] ; 1987.
Descripteurs français
- KwdFr :
- MESH :
- croissance et développement : Trypanosoma brucei brucei.
- génétique : ARN messager, Oligodésoxyribonucléotides, Trypanosoma brucei brucei.
- pharmacologie : Acridines.
- ADN recombiné, Animaux, Biosynthèse des protéines, Exons.
English descriptors
- KwdEn :
- MESH :
- chemical , genetics : Oligodeoxyribonucleotides, RNA, Messenger.
- chemical , pharmacology : Acridines.
- genetics : Trypanosoma brucei brucei.
- growth & development : Trypanosoma brucei brucei.
- Teeft :
- Acad, Acridine, Amexos, Animals, Asseline, Brucei, Brucei mrnas, Cazenave, Complementary, Covalently, Cultured cells, Cultured trypanosomes, DNA, Recombinant, Exons, Helene, Hybrid, Intercalating, Intercalating agent, Intercalating agents, Leader sequence, Lysate, Mrna, Natl, Nucl, Nuclease, Oligodeoxynucleotide, Oligodeoxynucleotides, Oligodeoxynucleotides covalently, Parasite, Proc, Protein Biosynthesis, Protein synthesis, Rabbit reticulocyte lysate, Reticulocyte, Thuong, Trypanosoma brucei, Trypanosome, Trypanosome mrnas, Trypanosomes, Unmodified, Xenopus oocytes.
Abstract
Abstract: Anti-messenger oligodeoxynucleotides covalently linked to an intercalating agent were tested for their ability to inhibit translation of Trypanosoma brucei mRNAs in a cell-free system. The sequence of these oligodeoxynucleotides was complementary to part of the 35-nucleotide (nt) sequence which is present at the 5′ end of all trypanosome mRNAs (the so-called mini-exon sequence). In a rabbit reticulocyte lysate, a nonadeoxynucleotide linked to an acridine derivative, specifically inhibited protein synthesis from T. brucei mRNAs much more efficiently than unmodified oligodeoxynucleotides of similar length. These oligodeoxynucleotides were tested on cultured trypanosomes. The acridine-linked nonadeoxynucleotide had a lethal effect on the parasites. No effect was observed with the homologous unmodified 9-mer nor with those 9-mers linked to the acridine derivative which were not complementary to the mini-exon sequence. These effects are probably a result of hybrid formation between the anti-messenger and mini-exon sequence. Trypanocidal activity of the acridinemodified nonadeoxynucleotide is most likely due to (i) increased affinity for its target, (ii) improved resistance to 3' exonucleases, and (iii) promoted membrane penetration of living parasites.
Url:
DOI: 10.1016/0378-1119(87)90194-6
Affiliations:
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<term>DNA, Recombinant</term>
<term>Exons</term>
<term>Oligodeoxyribonucleotides (genetics)</term>
<term>Protein Biosynthesis</term>
<term>RNA, Messenger (genetics)</term>
<term>Trypanosoma brucei brucei (genetics)</term>
<term>Trypanosoma brucei brucei (growth & development)</term>
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<term>ARN messager (génétique)</term>
<term>Acridines (pharmacologie)</term>
<term>Animaux</term>
<term>Biosynthèse des protéines</term>
<term>Exons</term>
<term>Oligodésoxyribonucléotides (génétique)</term>
<term>Trypanosoma brucei brucei (croissance et développement)</term>
<term>Trypanosoma brucei brucei (génétique)</term>
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<keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en"><term>Oligodeoxyribonucleotides</term>
<term>RNA, Messenger</term>
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<term>Asseline</term>
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<term>Exons</term>
<term>Helene</term>
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<term>Intercalating agents</term>
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<term>Oligodeoxynucleotide</term>
<term>Oligodeoxynucleotides</term>
<term>Oligodeoxynucleotides covalently</term>
<term>Parasite</term>
<term>Proc</term>
<term>Protein Biosynthesis</term>
<term>Protein synthesis</term>
<term>Rabbit reticulocyte lysate</term>
<term>Reticulocyte</term>
<term>Thuong</term>
<term>Trypanosoma brucei</term>
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<term>Trypanosome mrnas</term>
<term>Trypanosomes</term>
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<term>Xenopus oocytes</term>
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<front><div type="abstract" xml:lang="en">Abstract: Anti-messenger oligodeoxynucleotides covalently linked to an intercalating agent were tested for their ability to inhibit translation of Trypanosoma brucei mRNAs in a cell-free system. The sequence of these oligodeoxynucleotides was complementary to part of the 35-nucleotide (nt) sequence which is present at the 5′ end of all trypanosome mRNAs (the so-called mini-exon sequence). In a rabbit reticulocyte lysate, a nonadeoxynucleotide linked to an acridine derivative, specifically inhibited protein synthesis from T. brucei mRNAs much more efficiently than unmodified oligodeoxynucleotides of similar length. These oligodeoxynucleotides were tested on cultured trypanosomes. The acridine-linked nonadeoxynucleotide had a lethal effect on the parasites. No effect was observed with the homologous unmodified 9-mer nor with those 9-mers linked to the acridine derivative which were not complementary to the mini-exon sequence. These effects are probably a result of hybrid formation between the anti-messenger and mini-exon sequence. Trypanocidal activity of the acridinemodified nonadeoxynucleotide is most likely due to (i) increased affinity for its target, (ii) improved resistance to 3' exonucleases, and (iii) promoted membrane penetration of living parasites.</div>
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