Linked Life Data

16972266

Source:http://linkedlifedata.com/resource/pubmed/id/16972266

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2006-10-2
pubmed:abstractText
Oxidative stress, the result of cellular production of reactive oxygen species (ROS), has been implicated in causing many renal diseases. Adenosine triphosphate (ATP) is an important extracellular signal in the regulation of many intracellular processes in normal tubular cells as well as in the pathogenesis of cell injury. This study investigated the effect of ATP on H(2)O(2)-induced increase of cyclin kinase inhibitors (CKI) expression and its related signal molecules in primary cultured renal proximal tubule cells (PTCs). H(2)O(2) inhibited DNA synthesis in a concentration- (>50 microM) and time-dependent manner (>2 h), as determined by thymidine and BrdU incorporation, and by increase in the p21(WAF/Cip1) and p27(Kip1) expression levels. In contrast, ATP increased the level of thymidine, BrdU incorporation (>10(-5) M), and decreased the p21(WAF/Cip1) and p27(Kip1) expression levels, suggesting that ATP has a protective effect against H(2)O(2)-induced oxidative damage. Suramin, reactive blue 2 (RB-2), MRS 2159, and MRS 2179 did block the reversing effect of ATP. In addition, AMP-CPP or 2-methylthio-ATP blocked H(2)O(2)-induced inhibition of DNA synthesis, suggesting all these P2 purinoceptors may be potentially involved. ATP-induced stimulation of DNA synthesis was blocked by phosphatidylinositol 3-kinase (PI3K) and Akt inhibitors. These results suggest the involvement of P2 purinoceptors-mediated PI3K/Akt signal pathway in the protective effect of ATP against H(2)O(2)-induced oxidative damage. Indeed, pre-treatment with PI3K or Akt inhibitors did not protect H(2)O(2)-induced lipid peroxide (LPO) production and inhibition of thymidine incorporation. In conclusion, ATP, in part, blocked H(2)O(2)-induced increase of p21(WAF1/Cip1) and p27(Kip1) expression through PI3K and Akt signal pathway in renal PTCs.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0021-9541
pubmed:author
pubmed:copyrightInfo
(c) 2006 Wiley-Liss, Inc.
pubmed:issnType
Print
pubmed:volume
209
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
802-10
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed-meshheading:16972266-Adenosine Triphosphate, pubmed-meshheading:16972266-Animals, pubmed-meshheading:16972266-Cell Proliferation, pubmed-meshheading:16972266-Cells, Cultured, pubmed-meshheading:16972266-Cyclin-Dependent Kinase Inhibitor p21, pubmed-meshheading:16972266-Cyclin-Dependent Kinase Inhibitor p27, pubmed-meshheading:16972266-Hydrogen Peroxide, pubmed-meshheading:16972266-Kidney Tubules, Proximal, pubmed-meshheading:16972266-Lipid Peroxides, pubmed-meshheading:16972266-Male, pubmed-meshheading:16972266-Oxidants, pubmed-meshheading:16972266-Oxidative Stress, pubmed-meshheading:16972266-Phosphatidylinositol 3-Kinases, pubmed-meshheading:16972266-Protein Kinase Inhibitors, pubmed-meshheading:16972266-Proto-Oncogene Proteins c-akt, pubmed-meshheading:16972266-Rabbits, pubmed-meshheading:16972266-Reactive Oxygen Species, pubmed-meshheading:16972266-Signal Transduction
pubmed:year
2006
pubmed:articleTitle
Extracellular adenosine triphosphate protects oxidative stress-induced increase of p21(WAF1/Cip1) and p27(Kip1) expression in primary cultured renal proximal tubule cells: role of PI3K and Akt signaling.
pubmed:affiliation
Department of Veterinary Physiology, Biotherapy Human Resources Center, College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Korea.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't