Local in vivo administration of a decoy oligonucleotide targeting NF-κB induces apoptosis of osteoclasts after application of orthodontic forces to rat teeth
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- Published online on: November 1, 2006 https://doi.org/10.3892/ijmm.18.5.807
- Pages: 807-811
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Abstract
In this study, we report the in vivo effects of a decoy oligonucleotide targeting the nuclear factor κB (NF-κB) on osteoclasts during forced orthodontic tooth movement in rats. Wistar rats were subjected to orthodontic forces, in the absence or presence of treatment with a decoy molecule mimicking a nonsymmetric NF-κB binding site (5'-CGC TGG GGA CTT TCC ACG G-3'). TUNEL staining of fragmented DNA revealed that treatment with NF-κB decoy but not with scramble double-stranded oligodeoxynucleotides (ODN) induced a high level of osteoclast apoptosis in vivo. Immunohystochemical analysis for death receptor Fas revealed strong positivity only in samples treated with NF-κB decoys, demonstrating that osteoclasts are sensitive to death induction via Fas signaling. Induction of apoptosis in osteoclasts could be a strategy for treatment of excessive osteoclast activity in pathologic conditions such as osteoporosis, peri-articular osteolysis, inflammatory arthritis, Paget's syndrome and tumour-associated osteolytic metastases.
