Neurobiology of Essential Fatty Acids

Neurobiology of Essential Fatty Acids
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必需脂肪酸的神经生物学

DOI:
--
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发表时间:
1992
影响因子:
--
通讯作者:
M. G. Murphy
M. G. Murphy
中科院分区:
医学4区
文献类型:
--
作者:
Gino Toffano;N. Bazan;M. G. Murphy

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H.我是货车登博施。Schalkwijk,l J. Pfeilschifter,2和F. Marki生物膜和脂质酶学中心Padualaan 8,3584 CH Utrecht荷兰2研究部,Ciba-Geigy有限公司药物部CH-4002巴塞尔瑞士用白细胞介素-1B、肿瘤坏死因子或毛喉素处理大鼠肾小球系膜细胞,导致磷脂酶A2活性分泌到培养基中。基本上所有这些分泌的磷脂酶A2的活性被识别的单克隆抗体引起对大鼠肝线粒体14 kDa的II组磷脂酶A2。免疫印迹分析和凝胶过滤证实了在培养上清液中仅存在14 kDa磷脂酶A2。这种酶在未受刺激的系膜细胞中几乎检测不到,在6至8小时的滞后期后,在细胞和培养基中都可以检测到。结果表明,用细胞因子处理细胞后磷脂酶A2活性增加不是由于现有细胞酶库的活化,而是由II组磷脂酶A2的诱导合成引起的。用地塞米松(一种已知的前列腺素合成抑制剂)预处理细胞,剂量依赖性地抑制马槟榔碱诱导的磷脂酶A2活性。细胞和培养基的Western免疫印迹分析表明,这不是由于抑制现有的磷脂酶A2,而是因为地塞米松阻止了精氨酸诱导的磷脂酶A2蛋白的合成。
H. van den Bosch,l C. Schalkwijk,l J. Pfeilschifter,2 and F. Marki2 lCentre for Biomembranes and Lipid Enzymology Padualaan 8, 3584 CH Utrecht The Netherlands 2Research Department, Pharmaceuticals Division Ciba-Geigy Ltd. CH-4002 Basel Switzerland Treatment of rat glomerular mesangial cells with interleukin-1B, tumor necrosis factor or forskolin resulted in the secretion of phospholipase A2 activity into the culture medium. Essentially all of this secreted phospholipase A2 activity was recognized by monoclonal antibodies elicited against rat liver mitochondrial 14 kDa group II phospholipase A2. Immunoblot analysis and gel filtration confirmed the presence of only 14 kDa phospholipase A2 in the culture supernatant. This enzyme could hardly be detected in unstimulated mesangial cells and after a lag period of 6 to 8 hours becomes detectable in both cells and culture medium. The results indicate that the increased phospholipase A2 activity upon treatment of the cells with cytokines is not due to activation of an existing cellular pool of enzyme but is caused by induced synthesis of group II phospholipase A2. Pretreatment of the cells with dexamethasone, a known inhibitor of prostaglandin synthesis, dose-dependently inhibits cytokine-induced phospholipase A2 activity. Western immunoblot analysis of cells and culture medium demonstrates that this is not due to inhibition of existing phospholipase A2 but because dexamethasone prevents the cytokine-induced synthesis of phospholipase A2 protein.
磷脂酰肌醇 3-激酶产生的多磷酸肌醇是大鼠肝脏和牛脑中磷脂酶 C 的不良底物。
DOI: --
发表时间: 1989
期刊: The Journal of biological chemistry
影响因子: --
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Serunian,LA;Haber,MT;Fukui,T;Kim,JW;Rhee,SG;Lowenstein,JM;Cantley,LC
通讯作者: Cantley,LC
DOI: --
发表时间: 1987
影响因子: 4.7
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培养成纤维细胞的载脂蛋白 B、E 受体对囊泡脂蛋白的识别。
DOI: --
发表时间: 1986
影响因子: 6.5
作者:
Williams,KJ;Tall,AR;Tabas,I;Blum,C
通讯作者: Blum,C
DOI: 10.1016/0014-4835(83)90075-1
发表时间: 1983
影响因子: 3.4
作者:
Wiegand,RD;Anderson,RE
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大鼠视网膜中有机氢过氧化物的酶法估计。
DOI: 10.1016/0014-4835(83)90116-1
发表时间: 1983
影响因子: 3.4
作者:
Organisciak,DT;Favreau,P;Wang,HM
通讯作者: Wang,HM