2011 Fiscal Year Final Research Report
Functional role of lipid second messenger metabolizing enzyme in cell cycle and stress response
Project/Area Number |
20390050
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
General anatomy (including Histology/Embryology)
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Research Institution | Yamagata University |
Principal Investigator |
GOTO Kaoru 山形大学, 医学部, 教授 (30234975)
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Co-Investigator(Kenkyū-buntansha) |
ISEKI Ken 山形大学, 医学部, 准教授 (70332921)
HOZUMI Yasukazu 山形大学, 医学部, 准教授 (00372334)
OKADA Masashi 山形大学, 医学部, 講師 (70512614)
TANAKA Toshiaki 山形大学, 医学部, 助教 (70536987)
|
Project Period (FY) |
2008 – 2011
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Keywords | 細胞周期 / ストレス応答 / 脂質代謝酵素 |
Research Abstract |
Diacylglycerol kinase (DGK), an enzyme that phosphorylates diacylglycerol to phosphatidic acid, is involved in many pathophysiological cellular responses, such as cancer and apoptosis. Our previous studies show that DGKζ, which contains a nuclear localization signal, is localized in the nucleus of hippocampal neurons but rapidly translocates from the nucleus to the cytoplasm and disappears in the early phase of ischemia, suggesting its implication in an apoptotic process. In this study we investigated the functional link between DGKζ cytoplasmic translocation and p53 that acts as the hub of various stress pathways. We found that cytoplasmic DGKζ induces cytoplasmic localization of p53 after DNA damage and suppresses p53 induction. In neurons, down-regulation of nuclear DGK. after excitotoxic stress leads to aberrant cell cycle reentry, which results in cell death. These findings suggest that DGKζ cytoplasmic translocation exerts distinct effects on signal transduction both in the cytoplasm and the nucleus.
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Research Products
(27 results)
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[Journal Article] NMDA receptor-mediated Ca(2+) influx triggers nucleocytoplasmic translocation of diacylglycerol kinase ζ under oxygen-glucose deprivation conditions, an in vitro model of ischemia, in rat hippocampal slices2012
Author(s)
Suzuki Y, Yamazaki Y, Hozumi Y, Okada M, Tanaka T, Iseki K, Ohta N, Aoyagi M, Fujii S, Goto K.
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Journal Title
Histochem CellBiol
Volume: 137
Pages: 499-511
DOI
Peer Reviewed
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[Journal Article] DGKζ is involved in LPS-activated phagocytosis through IQGAP1/Rac1 pathway2012
Author(s)
Okada M, Hozumi Y, Iwazaki K, Misaki K, Yanagida M, Araki Y, Watanabe T, Yagisawa H, Topham MK, Kaibuchi K, Goto K.
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Journal Title
Biochem Biophys Res Commun
Volume: 420
Pages: 479-84
DOI
Peer Reviewed
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[Journal Article] DGKζ is degraded through the cytoplasmic ubiquitin-proteasome system under excitotoxic conditions, which causes neuronal apoptosis because of aberrant cell cycle reentry2012
Author(s)
Okada M, Hozumi Y, Tanaka T, Suzuki Y, Yanagida M, Araki Y, Evangelisti C, Yagisawa H, Topham MK, Martelli AM, Goto K.
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Journal Title
Cell Signal
Volume: 24
Pages: 1573-82
DOI
Peer Reviewed
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[Journal Article] NAP Interaction of nucleosome assembly proteins abolishes nuclear localization of DGKζ by attenuating its association with importins2011
Author(s)
Okada M, Hozumi Y, Ichimura T, Tanaka T, Hasegawa H, Yamamoto M, Takahashi N, Iseki K, Yagisawa H, Shinkawa T, Isobe T, Goto K.
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Journal Title
Exp Cell Res
Volume: 317
Pages: 2853-63
DOI
Peer Reviewed
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