Characterization of YM-90709 as a novel antagonist which inhibits the binding of interleukin-5 to interleukin-5 receptor.

Characterization of YM-90709 as a novel antagonist which inhibits the binding of interleukin-5 to interleukin-5 receptor.
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YM-90709 的表征为一种新型拮抗剂,可抑制 IL-5 与 IL-5 受体的结合。

DOI:
10.1016/s1567-5769(02)00191-1
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发表时间:
2002
影响因子:
5.6
通讯作者:
Toshimitsu Yamada
Toshimitsu Yamada
中科院分区:
医学2区
文献类型:
--
作者:
T. Morokata;K. Ida;Toshimitsu Yamada

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白介素5(IL-5)在哮喘和特应性皮炎等过敏性炎症中对嗜酸性粒细胞的激活起重要作用。本文报道了一种新合成的化合物YM-90709,2,3-dimethoxy-6,6-dimethyl-5,6-dihydrobenzo[7,8]indolizino[2,3-b]quinoxaline,能抑制人外周血嗜酸粒细胞和丁酸处理的HL-60克隆15细胞上IL-5与其受体的结合,其IC50值分别为1.0和0.57μM。相比之下,YM-90709不影响粒细胞-巨噬细胞集落刺激因子与其受体在嗜酸性粒细胞和嗜酸性粒细胞HL-60克隆15细胞上的结合。在功能测定中,YM-90709抑制IL-5延长的嗜酸性粒细胞存活,IC50值为0.45μM,而不影响GM-CSF延长的嗜酸性粒细胞存活。此外,YM-90709抑制IL-5诱导的HL-60克隆性细胞中JAK2的酪氨酸磷酸化,但不抑制GM-CSF诱导的JAK2。这些结果表明YM-90709是一种新型的IL-5抑制剂,能选择性地阻断IL-5与IL-5R的结合。
Interleukin-5 (IL-5) plays an important role in the activation of eosinophils in allergic inflammation including asthma and atopic dermatitis. A newly synthesized compound, YM-90709, 2,3-dimethoxy-6,6-dimethyl-5,6-dihydrobenzo[7,8]indolizino[2,3-b]quinoxaline, is reported here to inhibit the binding of IL-5 to its receptor on peripheral human eosinophils and butyric acid-treated eosinophilic HL-60 clone 15 cells, with IC50values of 1.0 and 0.57 μM, respectively. In contrast, YM-90709 did not affect the binding of granulocyte–macrophage colony-stimulating factor (GM-CSF) to its receptor on eosinophils and eosinophilic HL-60 clone 15 cells. In functional assays, YM-90709 inhibited IL-5-prolonged eosinophil survival with an IC50value of 0.45 μM and did not affect the GM-CSF-prolonged eosinophil survival. Furthermore, YM-90709 inhibited the IL-5-induced but not GM-CSF-induced tyrosine phosphorylation of Janus kinase 2 (JAK2) in eosinophilic HL-60 clone 15 cells. These results indicate that YM-90709 is a novel IL-5 inhibitor which selectively blocks the binding of IL-5 to the IL-5 receptor (IL-5R).
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