| pubmed-article:12825835 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:12825835 | lifeskim:mentions | umls-concept:C0007634 | lld:lifeskim |
| pubmed-article:12825835 | lifeskim:mentions | umls-concept:C0162638 | lld:lifeskim |
| pubmed-article:12825835 | lifeskim:mentions | umls-concept:C0004114 | lld:lifeskim |
| pubmed-article:12825835 | lifeskim:mentions | umls-concept:C0597357 | lld:lifeskim |
| pubmed-article:12825835 | lifeskim:mentions | umls-concept:C0028630 | lld:lifeskim |
| pubmed-article:12825835 | lifeskim:mentions | umls-concept:C0033634 | lld:lifeskim |
| pubmed-article:12825835 | lifeskim:mentions | umls-concept:C0333516 | lld:lifeskim |
| pubmed-article:12825835 | lifeskim:mentions | umls-concept:C1418221 | lld:lifeskim |
| pubmed-article:12825835 | lifeskim:mentions | umls-concept:C1515877 | lld:lifeskim |
| pubmed-article:12825835 | lifeskim:mentions | umls-concept:C1879547 | lld:lifeskim |
| pubmed-article:12825835 | pubmed:issue | 3 | lld:pubmed |
| pubmed-article:12825835 | pubmed:dateCreated | 2003-6-26 | lld:pubmed |
| pubmed-article:12825835 | pubmed:abstractText | 1. We recently reported that the activation by UDP of rat P2Y6 nucleotide receptors expressed in 1321N1 astrocytoma cells protected them from TNFalpha-induced apoptosis by suppressing activation of caspase 3 and 8. This study aims to characterize the involvement of intracellular signaling pathways, including kinases involved in the antiapoptotic effect of UDP. 2. Cell death was induced in 1321N1 astrocytoma cells permanently expressing the rat P2Y6 receptor by exposure to TNFalpha in the presence of cycloheximide. The apoptotic fraction was analyzed using flow cytometry. 3. The activation of P2Y6 receptors by UDP both protected the astrocytes from TNF-alpha induced apoptosis and activated protein kinase C (PKC) isotypes. The phorbol ester PMA also activated PKC and protected the cells from TNFalpha-induced cell death. The alpha- and epsilon-isotypes of PKC were both activated in a persistent fashion upon 5-min exposure to either UDP (10 microM) or the phorbol ester PMA (100 nM). The PKCzeta isotype was markedly activated upon UDP treatment. 4. The addition of PKC inhibitors, GF109203X or Gö6976, partially antagonized the protective effect of UDP and reduced the UDP-induced phosphorylation of extracellular signal-regulated protein kinases (Erk). The inhibitors of Erk, PD98,059 or U0126, antagonized UDP-induced protection. 5. The antiapoptotic protein, Akt, was not affected by P2Y6 receptor activation. Incubation of the astrocytes with calcium modifiers BAPTA-AM or dantrolene, did not affect the UDP-induced protection from apoptosis. 6. The addition of phospholipase C (PLC) inhibitors, D609 or U73122, partially antagonized both UDP-induced protection and PKC activation. | lld:pubmed |
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| pubmed-article:12825835 | pubmed:language | eng | lld:pubmed |
| pubmed-article:12825835 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:12825835 | pubmed:citationSubset | IM | lld:pubmed |
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| pubmed-article:12825835 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:12825835 | pubmed:month | Jun | lld:pubmed |
| pubmed-article:12825835 | pubmed:issn | 0272-4340 | lld:pubmed |
| pubmed-article:12825835 | pubmed:author | pubmed-author:BrodieChayaC | lld:pubmed |
| pubmed-article:12825835 | pubmed:author | pubmed-author:JacobsonKenne... | lld:pubmed |
| pubmed-article:12825835 | pubmed:author | pubmed-author:GaoZhan-GuoZG | lld:pubmed |
| pubmed-article:12825835 | pubmed:author | pubmed-author:ChangTong-Shi... | lld:pubmed |
| pubmed-article:12825835 | pubmed:author | pubmed-author:SoltysiakKell... | lld:pubmed |
| pubmed-article:12825835 | pubmed:author | pubmed-author:KimSeong GSG | lld:pubmed |
| pubmed-article:12825835 | pubmed:issnType | Print | lld:pubmed |
