STM:IL-17在心血管斑块上“敷上创可贴”

2013-08-01 koo bio360

日前,瑞典卡罗林斯卡医学院和耶鲁大学医学院的研究人员发现,一种叫做 IL-17 的分子可帮助防止堵塞的动脉破裂,因而减少了心脏病发作或中风的风险。 动脉粥样硬化或动脉壁增厚及变硬是全球最常见的死亡原因。该过程是在胆固醇及其它脂肪物质在动脉壁内引发炎症及某种脂性沉着或斑块出现时开始的。该斑块会在其开裂或破裂时变得危险,因为它会导致血凝块的形成。当血液和氧气无法到达心脏或脑部时,心脏病发作或中风

日前,瑞典卡罗林斯卡医学院和耶鲁大学医学院的研究人员发现,一种叫做 IL-17 的分子可帮助防止堵塞的动脉破裂,因而减少了心脏病发作或中风的风险。

动脉粥样硬化或动脉壁增厚及变硬是全球最常见的死亡原因。该过程是在胆固醇及其它脂肪物质在动脉壁内引发炎症及某种脂性沉着或斑块出现时开始的。该斑块会在其开裂或破裂时变得危险,因为它会导致血凝块的形成。当血液和氧气无法到达心脏或脑部时,心脏病发作或中风将会发生。

使用目前有的药物,人们通过降低胆固醇及血压、控制糖尿病及不吸烟从而有可能阻止动脉粥样硬化斑的积聚。但是,防止已经形成的斑块发生破裂的方法并不存在。

在这项最新研究中,研究人员希望弄清楚 TGF-beta 是如何影响动脉粥样硬化的, TGF-beta 是免疫系统中重要的信号分子。

人们已知 TGF-beta 在炎症调节中起着作用。在小鼠实验中,研究人员发现, TGF-beta 与另外一种信号分子一起制造了第 3 个被称作 IL-17 的分子。当 IL-17 到达动脉壁细胞时,它会用胶原纤维在动脉粥样硬化斑块上构建一个厚实的保护盖或“创可贴”,后者可让积聚的脂肪稳定并减少其破裂及形成血凝块的风险。

研究人员表示,IL-17可能是用于稳定动脉粥样硬化斑块的一种有前途的新的药物标靶。

Anton Gisterå, Anna-Karin L. Robertson, John Andersson, Daniel F. J. Ketelhuth, Olga Ovchinnikova, Stefan K. Nilsson, Anna M. Lundberg, Ming O. Li, Richard A. Flavell, * andGöran K. Hansson. Transforming Growth Factor–β Signaling in T Cells Promotes Stabilization of Atherosclerotic Plaques Through an Interleukin-17–Dependent Pathway. Sci. Transl. Med. 31 July 2013; DOI: 10.1126/scitranslmed.3006133

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    2014-07-06 gdsun
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    2013-08-03 fzwish20000
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    2013-08-03 jjjiang0202

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