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.

Local in vivo administration of a decoy oligonucleotide targeting NF-kappaB induces apoptosis of osteoclasts after application of orthodontic forces to rat teeth.

PENOLAZZI, Maria Letizia;LAMBERTINI, Elisabetta;CALO', Girolamo;SICILIANI, Giuseppe;PIVA, Maria Roberta;GAMBARI, Roberto
2006

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.
2006
Penolazzi, Maria Letizia; Magri, E; Lambertini, Elisabetta; Calo', Girolamo; Cozzani, M; Siciliani, Giuseppe; Piva, Maria Roberta; Gambari, Roberto
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/499078
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