| Literature DB >> 16569477 |
William M W Cheung1, Patrick W K Chu, Yok L Kwong.
Abstract
A human neuroblastoma cell line, IMR-32, was used as an in vitro model system to study the effects of arsenic trioxide (As(2)O(3)) on aggressive human neuroblastoma. From 0.5 micro M, As(2)O(3) exhibited a dose-dependent inhibition of IMR-32 proliferation. At concentrations of 1.5 micro M or higher, As(2)O(3) up-regulated caspase 3, leading to cellular apoptosis. However, neurofilament-200 kDa and tyrosine hydroxylase were not up-regulated, implying minimal neuronal differentiation. Concomitantly, TrkA was down-regulated and TrkB up-regulated. Pre-treatment with the protein kinase C (PKC) inhibitor Ro-31-8220 partially blocked As(2)O(3)-mediated apoptosis, meaning that As(2)O(3) might signal through PKC activation. The results suggest that As(2)O(3) might be potentially useful in neuroblastoma.Entities:
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Year: 2006 PMID： 16569477 DOI： 10.1016/j.canlet.2006.02.009
Source DB: PubMed Journal: Cancer Lett ISSN： 0304-3835 Impact factor: 8.679