Protective mechanisms of pycnogenol in ethanol-insulted cerebellar granule cells.

Protective mechanisms of pycnogenol in ethanol-insulted cerebellar granule cells.
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碧萝芷对乙醇损伤的小脑颗粒细胞的保护机制。

DOI:
10.1002/neu.20057
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发表时间:
2004
期刊:
Journal of neurobiology.
影响因子:
--
通讯作者:
Heaton,MarietaB
Heaton,MarietaB
中科院分区:
--
文献类型:
--
作者:
Siler-Marsiglio,KendraI;Paiva,Michael;Madorsky,Irina;Serrano,Yahaira;Neeley,Andy;Heaton,MarietaB

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碧萝芷®(PYC)是一种从法国海洋松(Pinus maritima)树皮中提取的生物素的专利组合,可抑制急性暴露于乙醇(EtOH)的发育中神经元的凋亡和坏死。目前的研究表明,PYC在暴露于EtOH的出生后9天小脑颗粒细胞(P9 CGC)中的保护机制包括:(1)减少活性氧(ROS)的产生;(2)对抗抑制的铜/锌超氧化物歧化酶(SOD)。(Cu/Zn SOD)和谷胱甘肽过氧化物酶/还原酶(GSH-Px/GSSG-R)系统活性;(3)Cu/Zn SOD蛋白表达上调;(4)减轻EtOH介导的过氧化氢酶(CAT)活性恶化;和(5)特异性结合和抑制活性caspase-3。这些结果表明,PYC拮抗EtOH诱导的氧化应激的机制包括氧化剂清除和内源性细胞蛋白的调节。使用本研究和以前的研究结果,描绘了一个模型的机制EtOH的影响系统的抗氧化酶在开发CGCs。© 2004 Wiley Periodicals,Inc.神经生物学杂志,2004年
Pycnogenol® (PYC), a patented combination of bioflavonoids extracted from the bark of French maritime pine (Pinus maritima), inhibits apoptosis and necrosis of developing neurons exposed acutely to ethanol (EtOH). The present study shows that the protective mechanisms of PYC in EtOH‐exposed postnatal day 9 cerebellar granule cells (P9 CGCs) include (1) reduction of reactive oxygen species (ROS) production; (2) counteraction of suppressed copper/zinc superoxide dismutase (Cu/Zn SOD) and glutathione peroxidase/reductase (GSH‐Px/GSSG‐R) system activities; (3) upregulation of Cu/Zn SOD protein expression; (4) mitigation of the EtOH‐mediated exacerbation of catalase (CAT) activity; and, (5) specific binding and inhibition of active caspase‐3. These results indicate that the mechanisms by which PYC antagonizes EtOH‐induced oxidative stress include oxidant scavenging and modulation of endogenous, cellular proteins. Using findings from the present and previous studies, a model delineating the mechanisms of EtOH effects on the system of antioxidant enzymes in developing CGCs is presented. © 2004 Wiley Periodicals, Inc. J Neurobiol, 2004
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DOI: --
发表时间: 2002
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