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Erschienen in:
01.09.2010 | Original Article
Amelioration of dextran sulfate sodium-induced colitis by neuropeptide Y antisense oligodeoxynucleotide
Erschienen in: International Journal of Colorectal Disease | Ausgabe 9/2010
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Background
Neuropeptide Y (NPY) from enteric neurons has been shown to play an important role in immune and inflammatory responses. The purpose of the present study was to investigate the effects of NPY antisense oligodeoxynucleotides (ODNs) on an experimental model of ulcerative colitis (UC).
Methods
NPY antisense ODNs were administered in experimental colitis induced by dextran sulfate sodium (DSS). The disease activity index (DAI) and histological score were observed. The tumor necrosis factor (TNF)-α and NPY levels were measured by enzyme-linked immunosorbent assay. Phosphorylated Akt (p-Akt) expression was determined by immunohistochemical staining. Activated nuclear factor (NF)-κB was assessed by western blot analysis. Myeloperoxidase (MPO) activity was determined by using MPO assay kit.
Results
A significant improvement was observed in DAI and histological score in rats with NPY antisense ODNs, and the increase in NPY and TNF-α levels, MPO activity, and the expression p-Akt and p-NF-κB in rats with DSS-induced colitis was significantly reduced following the administration of NPY antisense ODNs.
Conclusion
The administration of NPY antisense ODNs leads to an amelioration of DSS-induced colitis, suggesting that NPY plays an important role in modulating inflammation in colitis, and NPY antisense ODNs may be a useful therapeutic approach to the treatment of UC.