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Adenosine as an active component of Antrodia cinnamomea that prevents rat PC12 cells from serum deprivation-induced apoptosis through the activation of adenosine A(2A) receptors

机译:腺苷作为牛樟芝的活性成分,可通过激活腺苷A(2A)受体阻止大鼠PC12细胞从血清剥夺诱导的细胞凋亡

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Antrodia cinnamomea (formerly named Antrodia camphorata) is a rare medicinal fungus. We previously reported that it exhibits antioxidative, vasorelaxative, anti-inflammatory, and anti-angiogenic effects. When serum deprivation-induced apoptosis in neuronal-like PC12 cells was used as a stress model, the extract of A. cinnamomea displayed effectiveness in preventing serum-deprived apoptosis. Since our previous data show that the extract of A. cinnamomea contains adenosine (ADO), we attempt to investigate if the active component is ADO and to identify its targeting site in this study. After pre-incubation with ADO deaminase, neither ADO nor the extract of A. cinnamomea exerted any protection, demonstrating that the active component of A. cinnamomea is ADO. Furthermore, an ADO A(2A) receptor (A(2A)-R) antagonist was used and was able to block the protective effects of ADO and the extract of A. cinnamomea, demonstrating that the ADO targeting site in this model is A(2A)-R. Taken together, the protective effect of A. cinnamomea is owed to its active component, ADO, which acts through activation of A(2A)-R to prevent serum deprivation-induced PC12 cell apoptosis. (c) 2006 Elsevier Inc. All rights reserved.
机译:牛樟芝(以前称为樟芝)是一种罕见的药用真菌。我们以前曾报道过它表现出抗氧化,血管舒张,抗炎和抗血管生成作用。当血清剥夺诱导的神经元样PC12细胞凋亡作为应激模型时,肉桂提取物显示出有效的预防血清剥夺的凋亡的作用。由于我们先前的数据显示肉桂曲霉的提取物含有腺苷(ADO),因此在本研究中,我们尝试调查活性成分是否为ADO,并确定其靶向位点。与ADO脱氨酶预孵育后,ADO和肉桂曲霉的提取物均未发挥任何保护作用,表明肉桂曲霉的活性成分是ADO。此外,使用了ADO A(2A)受体(A(2A)-R)拮抗剂,该拮抗剂能够阻断ADO和肉桂曲霉提取物的保护作用,表明该模型中的ADO靶向位点是A( 2A)-R。归纳起来,肉桂曲霉的保护作用归功于其活性成分ADO,它通过激活A(2A)-R来防止血清剥夺诱导的PC12细胞凋亡而起作用。 (c)2006 Elsevier Inc.保留所有权利。

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