Lipoxin A(4) attenuates LPS-induced acute lung injury via activation of the ACE2-Ang-(1-7)-Mas axis.

Lipoxin A(4) attenuates LPS-induced acute lung injury via activation of the ACE2-Ang-(1-7)-Mas axis.
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脂氧素 A(4) 通过激活 ACE2-Ang-(1-7)-Mas 轴减轻 LPS 诱导的急性肺损伤

DOI:
10.1177/1753425918785008
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发表时间:
2018-07
期刊:
影响因子:
3.2
通讯作者:
Zhou XY
Zhou XY
中科院分区:
生物学4区
文献类型:
--
作者:
Chen QF;Kuang XD;Yuan QF;Hao H;Zhang T;Huang YH;Zhou XY

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脂氧素A4(lipoxin A4,LXA 4)和血管紧张素I转化酶2(angiotensin I converting enzyme 2,ACE 2)、血管紧张素-(1 - 7)[Ang-(1-7)]及其受体Mas [ACE 2-Ang-(1-7)-Mas]轴在急性肺损伤(acute lung injury,ALI)中起重要的保护作用。然而,在ALI期间,仍然没有直接证据表明LXA 4通过ACE 2-Ang-(1-7)-Mas轴介导的保护作用。该工作使用LPS诱导的ALI小鼠模型进行,数据表明如下。首先,成功建立了动物模型,LXA 4对LPS诱导的ALI有明显的改善作用。LXA_4能显著提高ACE_2的浓度和活性,并能显著提高Ang-(1-7)和Mas的水平。第三,LXA 4降低了TNF-α、IL-1β和活性氧的水平,同时增加了IL-10的水平。第四,LXA 4抑制NF-κB信号通路的激活,抑制NF-κB抑制物的降解、NF-κB的磷酸化和NF-κB的转位。最后,更重要的是,发现B 0 C-2(LXA 4受体抑制剂)、MLN-4760(ACE 2抑制剂)和A779(Mas受体拮抗剂)逆转LXA 4的所有作用。我们的数据提供了LXA 4通过调节ACE 2-Ang-(1-7)-Mas轴保护肺免受ALI的证据。
Previous studies have reported that lipoxin A4 (LXA4) and the angiotensin I-converting enzyme 2 (ACE2), angiotensin-(1-7) [Ang-(1-7)], and its receptor Mas [ACE2-Ang-(1-7)-Mas] axis play important protective roles in acute lung injury (ALI). However, there is still no direct evidence of LXA4-mediated protection via the ACE2-Ang-(1-7)-Mas axis during ALI. This work was performed using an LPS-induced ALI mouse model and the data indicated the following. First, the animal model was established successfully and LXA4 ameliorated LPS-induced ALI. Second, LXA4 could increase the concentration and activity of ACE2 and the levels of Ang-(1-7) and Mas markedly. Third, LXA4 decreased the levels of TNF-α, IL-1β, and reactive oxygen species while increasing IL-10 levels. Fourth, LXA4 inhibited the activation of the NF-κB signal pathway and repressed the degradation of inhibitor of NF-κB, the phosphorylation of NF-κB, and the translocation of NF-κB. Finally, and more importantly, BOC-2 (LXA4 receptor inhibitor), MLN-4760 (ACE2 inhibitor), and A779 (Mas receptor antagonist) were found to reverse all of the effects of LXA4. Our data provide evidence that LXA4 protects the lung from ALI through regulation of the ACE2-Ang-(1-7)-Mas axis.
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