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Primary Metabolism and Medium-Chain Fatty Acid Alterations Precede Long-Chain Fatty Acid Changes Impacting Neutral Lipid Metabolism in Response to an Anticancer Lysophosphatidylcholine Analogue in Yeast
Journal of Proteome Research ( IF 4.4 ) Pub Date : 2017-09-13 00:00:00 , DOI: 10.1021/acs.jproteome.7b00430
Nicolas P. Tambellini 1, 2 , Vanina Zaremberg 1 , Saikumari Krishnaiah 3 , Raymond J. Turner 1 , Aalim M. Weljie 1, 2, 3
Affiliation  

The nonmetabolizable lysophosphatidylcholine (LysoPC) analogue edelfosine is the prototype of a class of compounds being investigated for their potential as selective chemotherapeutic agents. Edelfosine targets membranes, disturbing cellular homeostasis. Is not clear at this point how membrane alterations are communicated between intracellular compartments leading to growth inhibition and eventual cell death. In the present study, a combined metabolomics/lipidomics approach for the unbiased identification of metabolic pathways altered in yeast treated with sublethal concentrations of the LysoPC analogue was employed. Mass spectrometry of polar metabolites, fatty acids, and lipidomic profiling was used to study the effects of edelfosine on yeast metabolism. Amino acid and sugar metabolism, the Krebs cycle, and fatty acid profiles were most disrupted, with polar metabolites and short–medium chain fatty acid changes preceding long and very long-chain fatty acid variations. Initial increases in metabolites such as trehalose, proline, and γ-amino butyric acid with a concomitant decrease in metabolites of the Krebs cycle, citrate and fumarate, are interpreted as a cellular attempt to offset oxidative stress in response to mitochondrial dysfunction induced by the treatment. Notably, alanine, inositol, and myristoleic acid showed a steady increase during the period analyzed (2, 4, and 6 h after treatment). Of importance was the finding that edelfosine induced significant alterations in neutral glycerolipid metabolism resulting in a significant increase in the signaling lipid diacylglycerol.

中文翻译:

初级代谢和中链脂肪酸的变化先于长链脂肪酸的变化,从而影响酵母中抗癌磷脂酰胆碱类似物对中性脂质代谢的影响。

不可代谢的溶血磷脂酰胆碱(LysoPC)类似物edelfosine是一类化合物的原型,正在研究其作为选择性化学治疗剂的潜力。头孢哌啶靶向膜,扰乱细胞稳态。目前尚不清楚如何在细胞内区室之间传递膜改变,从而导致生长抑制和最终细胞死亡。在本研究中,采用了组合代谢组学/脂质组学方法无偏鉴定在用亚致死浓度的LysoPC类似物处理的酵母中改变的代谢途径。极性代谢物,脂肪酸和脂质组分析的质谱法用于研究依德福星对酵母代谢的影响。氨基酸和糖的代谢,克雷布斯循环,脂肪酸的分布最受破坏,极性代谢物和中短链脂肪酸的变化先于长链和超长链脂肪酸的变化。代谢物如海藻糖,脯氨酸和γ-氨基丁酸的初始增加,伴随着克雷布斯循环的代谢物柠檬酸和富马酸酯的减少,被解释为一种细胞尝试,以抵消由治疗引起的线粒体功能紊乱引起的氧化应激。值得注意的是,在分析期间(治疗后2、4和6小时),丙氨酸,肌醇和肉豆蔻酸显示出稳定的增加。重要的是发现依德福星在中性甘油脂代谢中引起显着改变,从而导致信号脂质二酰基甘油显着增加。极性代谢物和短-中链脂肪酸的变化先于长链和极长链脂肪酸的变化。代谢物如海藻糖,脯氨酸和γ-氨基丁酸的初始增加,伴随着克雷布斯循环的代谢物柠檬酸和富马酸酯的减少,被解释为一种细胞尝试,以抵消由治疗引起的线粒体功能紊乱引起的氧化应激。值得注意的是,在分析期间(治疗后2、4和6小时),丙氨酸,肌醇和肉豆蔻酸显示出稳定的增加。重要的是发现依德福星在中性甘油脂代谢中引起显着改变,从而导致信号脂质二酰基甘油显着增加。极性代谢物和短-中链脂肪酸的变化先于长链和极长链脂肪酸的变化。代谢物如海藻糖,脯氨酸和γ-氨基丁酸的初始增加,伴随着克雷布斯循环的代谢物柠檬酸和富马酸酯的减少,被解释为一种细胞尝试,以抵消由治疗引起的线粒体功能紊乱引起的氧化应激。值得注意的是,在分析期间(治疗后2、4和6小时),丙氨酸,肌醇和肉豆蔻酸显示出稳定的增加。重要的是发现依德福星在中性甘油脂代谢中引起显着改变,从而导致信号脂质二酰基甘油显着增加。脯氨酸和γ-氨基丁酸伴随着克雷布斯循环的代谢产物柠檬酸和富马酸酯的减少,被解释为一种细胞疗法,旨在抵消由于治疗引起的线粒体功能障碍而产生的氧化应激。值得注意的是,在分析期间(治疗后2、4和6小时),丙氨酸,肌醇和肉豆蔻酸显示出稳定的增加。重要的是发现依德福星在中性甘油脂代谢中引起显着改变,从而导致信号脂质二酰基甘油显着增加。脯氨酸和γ-氨基丁酸伴随着克雷布斯循环的代谢产物柠檬酸和富马酸酯的减少,被解释为一种细胞疗法,旨在抵消由于治疗引起的线粒体功能障碍而产生的氧化应激。值得注意的是,在分析期间(治疗后2、4和6小时),丙氨酸,肌醇和肉豆蔻酸显示出稳定的增加。重要的是发现依德福星在中性甘油脂代谢中引起显着改变,从而导致信号脂质二酰基甘油显着增加。和肉豆蔻酸在分析期间(治疗后2、4和6小时)显示出稳定的增加。重要的发现是依德福星诱导中性甘油脂代谢发生显着变化,导致信号脂质二酰基甘油显着增加。和肉豆蔻酸在分析期间(治疗后2、4和6小时)显示出稳定的增加。重要的是发现依德福星在中性甘油脂代谢中引起显着改变,从而导致信号脂质二酰基甘油显着增加。
更新日期:2017-09-14
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