Elevated Adiponectin Levels Suppress Perivascular and Aortic Inflammation and Prevent AngII-induced Advanced Abdominal Aortic Aneurysms.

Elevated Adiponectin Levels Suppress Perivascular and Aortic Inflammation and Prevent AngII-induced Advanced Abdominal Aortic Aneurysms.
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DOI:
10.1038/srep31414
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发表时间:
2016-09-23
期刊:
影响因子:
4.6
通讯作者:
Tangirala RK
Tangirala RK
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Wågsäter D;Vorkapic E;van Stijn CM;Kim J;Lusis AJ;Eriksson P;Tangirala RK

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腹主动脉瘤(AAA)是一种退行性疾病,其特征是主动脉扩张和破裂,导致猝死。目前,没有可用的非手术治疗方法,需要新的治疗靶点来预防AAA。我们研究了在一个完善的临床前模型中,增加脂联素(APN)(一种多效性脂肪因子)的血浆水平是否对预防AngII诱导的晚期AAA提供治疗益处。在AngII灌注的高脂血症低密度脂蛋白受体缺陷小鼠(LDLR−/−)模型中,我们使用表达小鼠APN的重组腺病毒(AdAPN)诱导血浆APN水平,并作为对照,表达绿色荧光蛋白的腺病毒(AdGFP)。APN表达产生持续和显着的总APN和高分子量APN水平的升高,并增强APN在动脉壁中的定位。AngII输注8周诱导AdGFP小鼠中的晚期AAA发展。APN通过抑制腹主动脉炎性细胞浸润、中膜变性和弹性蛋白断裂,抑制AdAPN小鼠腹主动脉瘤的发生。APN抑制血管紧张素1型受体(AT 1 R),炎症细胞因子和肥大细胞蛋白酶的表达,并诱导赖氨酰氧化酶(LOX)在主动脉壁,改善全身细胞因子谱和减轻脂肪炎症。这些研究强烈支持APN治疗作用,通过多种机制抑制AngII诱导的AAA和增加血浆APN水平作为预防晚期AAA的策略。
Abdominal aortic aneurysm (AAA) is a degenerative disease characterized by aortic dilation and rupture leading to sudden death. Currently, no non-surgical treatments are available and novel therapeutic targets are needed to prevent AAA. We investigated whether increasing plasma levels of adiponectin (APN), a pleiotropic adipokine, provides therapeutic benefit to prevent AngII-induced advanced AAA in a well-established preclinical model. In the AngII-infused hyperlipidemic low-density lipoprotein receptor-deficient mouse (LDLR−/−) model, we induced plasma APN levels using a recombinant adenovirus expressing mouse APN (AdAPN) and as control, adenovirus expressing green florescent protein (AdGFP). APN expression produced sustained and significant elevation of total and high-molecular weight APN levels and enhanced APN localization in the artery wall. AngII infusion for 8 weeks induced advanced AAA development in AdGFP mice. Remarkably, APN inhibited the AAA development in AdAPN mice by suppressing aortic inflammatory cell infiltration, medial degeneration and elastin fragmentation. APN inhibited the angiotensin type-1 receptor (AT1R), inflammatory cytokine and mast cell protease expression, and induced lysyl oxidase (LOX) in the aortic wall, improved systemic cytokine profile and attenuated adipose inflammation. These studies strongly support APN therapeutic actions through multiple mechanisms inhibiting AngII-induced AAA and increasing plasma APN levels as a strategy to prevent advanced AAA.
脆弱的动脉粥样硬化斑块中的肥大细胞 - 杀死的视野。
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