Title: Targeting bcl-2 by triplex-forming oligonucleotide - A promising carrier for gene-radiotherapy
Authors: Shen, CX ×
Rattat, Dirk
Buck, A
Mehrke, G
Polat, B
Ribbert, H
Schirrmeister, H
Mahren, B
Matuschek, C
Reske, SN #
Issue Date: Feb-2003
Publisher: Mary ann liebert inc publ
Series Title: Cancer biotherapy and radiopharmaceuticals vol:18 issue:1 pages:17-26
Abstract: Triplex forming oligonucleotides (TFO) provide a promising tool for gene therapy. DNA damaging agents have been successfully coupled to TFOs and induce site-directed DNA damages. Here, we attempted to apply this antigen strategy using a TFO incorporated with a Conversion-electron-emitter, (99m)technetium, to target bcl-2 gene, the prototypical inhibitor of apoptosis. In the bcl-2 promoter region, we found two TFO binding sites which bind corresponding TFOs with very high specificity and affinity. Both partially and completely phosphorothioated TFOs form stable triplexes and significantly inhibit gene transcription in vitro. We also found that purine motif TFO with a thymidine opposite a thymidine interruption at the polypurine strand can form a stable triplex. In addition, (99m)technetium-conjugated TFOs were found to form a stable triplex and to inhibit bcl-2 gene transcription in vitro. Our results suggest a promising application of this triplex-forming oligonucleotide based Conversion-electron-emitter mediated gene radiotherapy in diseases related to bcl-2 overexpression.
ISSN: 1084-9785
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Radiopharmaceutical Research
× corresponding author
# (joint) last author

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