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Inhibition of soluble epoxide hydrolase augments astrocyte release of vascular endothelial growth factor and neuronal recovery after oxygen-glucose deprivation

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单位: [1]Johns Hopkins Univ, Dept Anesthesiol & Crit Care Med, Baltimore, MD USA [2]Huazhong Univ Sci & Technol, Dept Anesthesiol, Tongji Hosp, Tongji Med Coll, Wuhan, Peoples R China [3]Univ Calif Davis, Dept Entomol & Nematol, Davis, CA 95616 USA [4]Univ Calif Davis, UCD Comprehens Canc Ctr, Davis, CA 95616 USA [5]Med Coll Wisconsin, Dept Physiol, 8701 Watertown Plank Rd, Milwaukee, WI 53226 USA [6]Med Coll Wisconsin, Cardiovasc Res Ctr, Milwaukee, WI 53226 USA [7]Clement J Zablocki VA Med Ctr, Milwaukee, WI USA
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关键词: Akt astrocyte epoxide hydrolase epoxyeicosatrienoic acid oxygen-glucose deprivation vascular endothelial growth factor

摘要:
Epoxyeicosatrienoic acids (EETs) are synthesized in astrocytes, and inhibitors of soluble epoxide hydrolase (sEH), which hydrolyzes EETs, reduce infarct volume in ischemic stroke. Astrocytes can release protective neurotrophic factors, such as vascular endothelial growth factor (VEGF). We found that addition of sEH inhibitors to rat cultured astrocytes immediately after oxygen-glucose deprivation (OGD) markedly increased VEGF concentration in the medium 48 h later and the effect was blocked by an EET antagonist. The sEH inhibitors increased EET concentrations to levels capable of increasing VEGF. When the sEH inhibitors were removed from the medium at 48 h, the increase in VEGF persisted for an additional 48 h. Neurons exposed to OGD and subsequently to astrocyte medium previously conditioned with OGD plus sEH inhibitors showed increased phosphorylation of their VEGF receptor-2, less TUNEL staining, and increased phosphorylation of Akt, which was blocked by a VEGF receptor-2 antagonist. Our findings indicate that sEH inhibitors, applied to cultured astrocytes after an ischemia-like insult, can increase VEGF secretion. The released VEGF then enhances Akt-enabled cell survival signaling in neurons through activation of VEGF receptor-2 leading to less neuronal cell death. These results suggest a new strategy by which astrocytes can be leveraged to support neuroprotection.

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出版当年[2016]版:
大类 | 2 区 医学
小类 | 2 区 神经科学 3 区 生化与分子生物学
最新[2025]版:
大类 | 3 区 医学
小类 | 3 区 生化与分子生物学 3 区 神经科学
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出版当年[2015]版:
Q2 NEUROSCIENCES Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY
最新[2023]版:
Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY Q2 NEUROSCIENCES

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第一作者单位: [1]Johns Hopkins Univ, Dept Anesthesiol & Crit Care Med, Baltimore, MD USA [2]Huazhong Univ Sci & Technol, Dept Anesthesiol, Tongji Hosp, Tongji Med Coll, Wuhan, Peoples R China
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通讯机构: [1]Johns Hopkins Univ, Dept Anesthesiol & Crit Care Med, Baltimore, MD USA [*1]Johns Hopkins Med Inst, Dept Anesthesiol & Crit Care Med, 600 North Wolfe St, Baltimore, MD 21287 USA
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