MAP kinase cascade in astrocytes

MAP kinase cascade in astrocytes
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星形胶质细胞中的 MAP 激酶级联

DOI:
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发表时间:
1994
期刊:
影响因子:
6.2
通讯作者:
M. Pierre
M. Pierre
中科院分区:
医学1区
文献类型:
--
作者:
C. Tournier;M. Pomérance;J. Gavaret;M. Pierre

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我们在培养的大鼠星形胶质细胞中研究了 MAP 激酶,该激酶以其在细胞内信号转导中的作用而闻名。 MAP 激酶活性由生长因子(FGFb、FGFa、EGF、PDGF 和 IGF1)、佛波酯(TPA)激活蛋白激酶 C(PKC)、神经肽(内皮素-1)和神经介质(卡巴胆碱)刺激。用 TPA 预处理 18 小时的星形胶质细胞仍然受到生长因子和内皮素的刺激,表明下调的 PKC 亚型不参与 MAP 激酶激活。相比之下,TPA 预处理抑制了卡巴胆碱的微小作用。星形胶质细胞含有两种可被 MAP 激酶抗体识别的蛋白质(p41 和 p44)。这些蛋白质在受刺激的星形胶质细胞胞质中的酪氨酸残基上被磷酸化。
We have studied in cultured rat astroglial cells MAP kinases, known for their role in intracellular signal transduction. The MAP kinase activity was stimulated by growth factors (FGFb, FGFa, EGF, PDGF, and IGF1), by a phorbol ester (TPA) activating‐protein kinase C (PKC), by a neuropeptide (endothelin‐1), and by a neuromediator (carbachol). Astrocytes pretreated for 18 h with TPA were still stimulated by growth factors and endothelin, suggesting that down‐regulated isoforms of PKC are not involved in MAP kinase activation. In contrast, the small effect of carbachol was suppressed by TPA pretreatment. Astrocytes contained two proteins (p41 and p44) recognized by MAP kinase antibody. These proteins were phosphorylated on tyrosine residues in the cytosols of stimulated astrocytes.
DOI: 10.1042/bj2870589
发表时间: 1992-10-15
影响因子: 4.1
作者:
WANG, YZ;SIMONSON, MS;DUNN, MJ
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DOI: --
发表时间: 1992
期刊: The Journal of biological chemistry
影响因子: --
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DOI: 10.1073/pnas.84.6.1502
发表时间: 1987-03-01
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发表时间: 1992-09-04
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DOI: 10.1016/0304-4157(85)90009-7
发表时间: 1985
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影响因子: --
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Ashendel,CL
通讯作者: Ashendel,CL