Tyrosine phosphorylation of phosphatidylinositol 3-kinase and of the thromboxane A2 (TXA2) receptor by the TXA2 mimetic I-BOP in A7r5 cells.

Tyrosine phosphorylation of phosphatidylinositol 3-kinase and of the thromboxane A2 (TXA2) receptor by the TXA2 mimetic I-BOP in A7r5 cells.
复制标题

A7r5 细胞中 TXA2 模拟 I-BOP 对磷脂酰肌醇 3-激酶和血栓素 A2 (TXA2) 受体的酪氨酸磷酸化。

DOI:
10.1016/s0006-2952(97)00005-1
复制
发表时间:
1997
影响因子:
5.8
通讯作者:
Ullian,ME
Ullian,ME
中科院分区:
医学2区
文献类型:
--
作者:
Morinelli,TA;Finley,EL;Jaffa,AA;Kurtz,DT;Ullian,ME

文献摘要

参考文献

被引文献

相似文献

血栓素 A2(TXA2) 与其 G 蛋白偶联受体 TP 受体相互作用,产生血管平滑肌细胞的收缩和增殖。我们之前已经证明,血管平滑肌细胞原代培养物的增殖是由[1S-(1α, 2β(5 Z ), 3α(1E, 3R), 4α]-7-[3-(3-羟基-4-(4 t́ - 碘苯氧基)-1-丁烯基)-7-氧双环-[2.2.1]庚烷-2基]-5'-引发的庚烯酸 (I-BOP) 是一种稳定的 TXA2 模拟物,由丝裂原激活蛋白 (MAP) 激酶的激活介导。在本研究中,我们进一步检查了参与血管平滑肌细胞 TXA2 激活的细胞内介质,将 TP 受体的 cDNA 瞬时转染到 A7r5 血管平滑肌细胞中,导致 TP 受体的表达,受体密度 Bmax 为 0.7 ±。 0.2 pmol/mg 蛋白和受体亲和力 Kd 为 0.6 ± 0.1 nM(N = 7)。在 TP 受体转染细胞中,I-BOP 使 MAP 激酶的激活增加 2 倍,刺激相对分子质量 (Mr) 为 140、85、60、56 和 45 kDa 的细胞蛋白的酪氨酸磷酸化。免疫印迹分析表明,85 kDa 的蛋白代表磷酸肌醇 3-激酶 (PI3-K),而 60 kDa 的蛋白是 TP 受体,添加 I-BOP (0.1 μM) 后,PI3-K 的活性增加了 3.5 倍。受体导致受体和 PI3-K 的酪氨酸磷酸化。
Thromboxane A2(TXA2) interacts with its G-protein coupled receptor, the TP receptor, to produce contraction and proliferation of vascular smooth muscle cells. We have shown previously that proliferation of primary cultures of vascular smooth muscle cells initiated by [1S-(1α, 2β(5 Z ), 3α(1E, 3R), 4α]-7-[3-(3- hydroxy -4-(4 t ́ - iodophenoxy )-1- butenyl )-7- oxabicyclo -[2.2.1] heptan -2 yl ]-5′- heptenoic acid (I-BOP), a stable TXA2mimetic, is mediated by activation of mitogen-activated protein (MAP) kinase. In the present study, we examined further the intracellular mediators involved in TXA2activation of vascular smooth muscle cells. Transient transfection of the cDNA for the TP receptor into A7r5 vascular smooth muscle cells resulted in expression of TP receptors with a receptor density, Bmax, of 0.7 ± 0.2 pmol/mg protein and a receptor affinity, Kd, of 0.6 ± 0.1 nM (N = 7). Mock transfected cells lacked significant receptor expression. In TP receptor transfected cells, I-BOP increased the activation of MAP kinase 2-fold, stimulated tyrosine phosphorylation of cellular proteins of relative molecular mass (Mr) of 140, 85, 60, 56, and 45 kDa, and increased the message for c-jun, a nuclear transcription factor involved in mitogenesis, 2.6-fold. Immunoblot analysis indicated that the 85-kDa protein represented phosphoinositide 3-kinase (PI3-K), while the 60 kDa protein was the TP receptor. The activity of PI3-K was increased 3.5-fold by the addition of I-BOP (0.1 μM). In summary, the present study demonstrated that stimulation of the TP receptor results in tyrosine phosphorylation of the receptor and of PI3-K.
血栓素、前列腺素和白三烯受体。
DOI: 10.1146/annurev.pa.29.040189.001241
发表时间: 1989
影响因子: 12.5
作者:
Halushka,PV;Mais,DE;Mayeux,PR;Morinelli,TA
通讯作者: Morinelli,TA
磷脂酰肌醇 3 激酶 p85 亚基作为连接胰岛素受体、p62 和 GTP 酶激活蛋白的衔接分子的作用。
DOI: --
发表时间: 1994
期刊: The Journal of biological chemistry
影响因子: --
作者:
Sung,CK;Sánchez-Margalet,V;Goldfine,ID
通讯作者: Goldfine,ID
羧基末端酪氨酸在 m2 毒蕈碱乙酰胆碱受体的下调和隔离中的不同作用。
DOI: --
发表时间: 1994
期刊: The Journal of biological chemistry
影响因子: --
作者:
Goldman,PS;Nathanson,NM
通讯作者: Nathanson,NM
125I 标记的血栓素 A2/前列腺素 H2 受体激动剂的表征。
DOI: --
发表时间: 1989
期刊: The Journal of pharmacology and experimental therapeutics
影响因子: --
作者:
Morinelli,TA;OatisJr,JE;Okwu,AK;Mais,DE;Mayeux,PR;Masuda,A;Knapp,DR;Halushka,PV
通讯作者: Halushka,PV
DOI: --
发表时间: 1996-05
期刊: The Journal of pharmacology and experimental therapeutics
影响因子: --
作者:
C. J. Allan;K. Higashiura;M. Martin;T. Morinelli;D. T. Kurtz;O. Geoffroy;G. Meier;T. Gettys;P. Halushka
通讯作者: C. J. Allan;K. Higashiura;M. Martin;T. Morinelli;D. T. Kurtz;O. Geoffroy;G. Meier;T. Gettys;P. Halushka