Linked Life Data

16795036

Source:http://linkedlifedata.com/resource/pubmed/id/16795036

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2006-11-2
pubmed:abstractText
Nuclear factor-kappa B (NF-kappaB) is an essential transcription factor in the control of expression of genes involved in cell growth, differentiation, inflammation, and neoplastic transformation. Previously, we reported that okadaic acid (OA), which is a specific inhibitor of serine/threonine protein phosphatases, induced apoptosis in cells of human osteosarcoma cell line MG63. However, to date, it is not clear whether the phosphorylation status of NF-kappaB could be affected by the treatment with OA. In this report, we demonstrate that treatment of MG63 cells with OA enhanced the phosphorylation level of NF-kappaB, as judged from the results of Western blot analysis and a lambda protein phosphatase dephosphorylation assay. The phosphorylation level of NF-kappaB was enhanced in both time- and dose-dependent manners. In the cells treated with 100 nM OA for 3 h, consequential translocation of NF-kappaB from the cytosol to the nucleus occurred. Western blotting experiments with an anti-phospho-p65NF-kappaB antibody disclosed that the NF-kappaB was phosphorylated on serine 536. Furthermore, OA stimulated the transcriptional activity of NF-kappaB in MG63 cells, as judged from the results of a luciferase assay. Our findings indicate that OA elicit phosphorylation of NF-kappaB on serine 536 in MG63 cells, resulting in the translocation of phospho-NF-kappaB to the nucleus, thereby promoting transcriptional activity of genes.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0730-2312
pubmed:author
pubmed:copyrightInfo
2006 Wiley-Liss, Inc.
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
99
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1275-84
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Okadaic acid induces phosphorylation of p65NF-kappaB on serine 536 and activates NF-kappaB transcriptional activity in human osteoblastic MG63 cells.
pubmed:affiliation
Department of Histology and Oral Histology, Institute of Health Biosciences, The University of Tokushima Graduate School, Kuramoto, Tokushima 770-8504, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't