Interleukin-1β has atheroprotective effects in advanced atherosclerotic lesions of mice.

Interleukin-1β has atheroprotective effects in advanced atherosclerotic lesions of mice.
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DOI:
10.1038/s41591-018-0124-5
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发表时间:
2018-09
期刊:
影响因子:
82.9
通讯作者:
Owens GK
Owens GK
中科院分区:
医学1区
文献类型:
--
作者:
Gomez D;Baylis RA;Durgin BG;Newman AAC;Alencar GF;Mahan S;St Hilaire C;Müller W;Waisman A;Francis SE;Pinteaux E;Randolph GJ;Gram H;Owens GK

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尽管有几十年的研究,我们对晚期动脉粥样硬化斑块稳定性的控制过程的理解仍然很差。虽然流行的假设是,减少炎症可能会改善先进的斑块稳定性,这是缺乏直接的证据。因此,我们使用抗IL-1β或IgG对照抗体对晚期动脉粥样硬化的平滑肌细胞(SMC)谱系追踪Apoe−/−小鼠进行了干预研究。令人惊讶的是,我们发现在西方饮食喂养的18和26周之间的IL-1β抗体处理诱导SMC和胶原含量的显著减少,但增加了纤维帽中的巨噬细胞数量。病变大小也没有变化,有益的外向重塑也没有完全抑制。我们还发现,SMC特异性IL-1 R1 KO导致较小的病变几乎没有SMC和纤维帽,而巨噬细胞选择性IL-1 R1丢失对病变大小或组成没有影响。总之,结果表明IL-1β促进了晚期小鼠动脉粥样硬化中的多种有益变化,包括促进向外重塑以及SMC/富含胶原的纤维帽的形成和维持。
Despite decades of research, our understanding of the processes controlling late-stage atherosclerotic plaque stability remains poor. Although a prevailing hypothesis is that reducing inflammation may improve advanced plaque stability, direct evidence of this is lacking. Therefore, we performed intervention studies on smooth muscle cell (SMC) lineage tracing Apoe−/− mice with advanced atherosclerosis using anti-IL-1β or IgG control antibodies. Surprisingly, we found that IL-1β antibody treatment between 18 and 26 weeks of Western diet feeding induced a marked reduction in SMC and collagen content, but increased macrophage number in the fibrous cap. There was also no change in lesion size and complete inhibition of beneficial outward remodeling. We also found that SMC-specific Il1r1 KO resulted in smaller lesions nearly devoid of SMC and a fibrous cap whereas macrophage-selective loss of IL-1R1 had no effect on lesion size or composition. Taken together, results show that IL-1β promotes multiple beneficial changes in late-stage murine atherosclerosis including promoting outward remodeling and formation and maintenance of a SMC/collagen-rich fibrous cap.
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发表时间: 2017-11
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