Cysteinyl leukotrienes regulate endothelial cell inflammatory and proliferative signals through CysLT₂ and CysLT₁ receptors.

Cysteinyl leukotrienes regulate endothelial cell inflammatory and proliferative signals through CysLT₂ and CysLT₁ receptors.
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DOI:
10.1038/srep03274
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发表时间:
2013-11-20
期刊:
影响因子:
4.6
通讯作者:
Paruchuri, Sailaja
Paruchuri, Sailaja
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Duah, Ernest;Adapala, Ravi K.;Al-Azzam, Nosayba;Kondeti, Vinay;Gombedza, Farai;Thodeti, Charles K.;Paruchuri, Sailaja

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半胱氨酰白三烯(cys-LTs)、LTC 4、LTD 4、LTE 4是通过两种不同的G蛋白偶联受体CysLT 1 R和CysLT 2 R起作用的强效炎症脂质介质。尽管cys-LT显示诱导血管渗漏和动脉粥样硬化,但cys-LT调节内皮功能的分子机制尚不清楚。在这里,我们表明,cys-LTs(LTC 4和LTD 4)通过CysLT 2 R诱导人脐静脉内皮细胞(HUVECs)中的强钙内流,而不是CysLT 1 R。此外,cys-LT处理诱导内皮细胞(EC)收缩,导致单层破坏通过CysLT 2 R/Rho激酶依赖性途径。此外,cys-LT刺激增强了TNFα诱导的VCAM-1表达和通过CysLT 2 R将白细胞募集到EC。相反,我们发现LTC 4和LTD 4都通过CysLT 1 R刺激EC增殖。综上所述,这些结果表明cys-LTs分别通过CysLT 2 R/Rho激酶和CysLT 1 R/Erk依赖性途径诱导内皮炎症和增殖,这在心血管疾病如动脉粥样硬化和心肌梗死的病因学中起关键作用。
Cysteinyl leukotrienes (cys-LTs), LTC4, LTD4, LTE4 are potent inflammatory lipid mediators that act through two distinct G-protein-coupled receptors, CysLT1R and CysLT2R. Although cys-LTs are shown to induce vascular leakage and atherosclerosis, the molecular mechanism by which cys-LTs modulate endothelial function is not known. Here, we show that cys-LTs (LTC4 and LTD4) induce robust calcium influx in human umbilical vein endothelial cells (HUVECs) through CysLT2R, but not CysLT1R. Further, cys-LT treatment induced endothelial cell (EC) contraction leading to monolayer disruption via CysLT2R/Rho kinase dependent pathway. Furthermore, stimulation with cys-LTs potentiated TNFα-induced VCAM-1 expression and leukocyte recruitment to ECs through CysLT2R. In contrast, we found that both LTC4 and LTD4 stimulated EC proliferation through CysLT1R. Taken together, these results suggest that cys-LTs induce endothelial inflammation and proliferation via CysLT2R/Rho kinase and CysLT1R/Erk dependent pathways, respectively, which play critical role in the etiology of cardiovascular diseases such as atherosclerosis and myocardial infarction.
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