Expression of a PCSK9 Gain-of-Function Mutation in C57BL/6J Mice to Facilitate Angiotensin II-Induced AAAs.

Expression of a PCSK9 Gain-of-Function Mutation in C57BL/6J Mice to Facilitate Angiotensin II-Induced AAAs.
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DOI:
10.3390/biom12070915
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发表时间:
2022-06-29
期刊:
影响因子:
5.5
通讯作者:
--
中科院分区:
生物学2区
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--
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血管紧张素II(AngII)灌注在小鼠中已被广泛用于研究腹主动脉瘤(AAA)的机制。为了实现AngII诱导的AAA的高发生率,小鼠应该是高胆固醇血症的。因此,低密度脂蛋白受体(LDLR)或载脂蛋白E缺乏已被用作高胆固醇血症的背景。然而,产生具有LDLR或载脂蛋白E缺陷背景的化合物缺陷菌株是耗时且昂贵的过程。前蛋白转化酶枯草杆菌蛋白酶/kexin 9型(PCSK 9)促进LDL受体的降解。先前的研究表明,在喂食西方饮食的C57 BL/6 J小鼠中,单次腹膜内注射表达小鼠PCSK 9的功能获得性突变的腺相关病毒(AAV)(AAV.mPCSK9D377Y)后,血浆胆固醇浓度显著增加。值得注意的是,注射AAV.mPCSK9D377Y增强了C57 BL/6 J小鼠中AngII诱导的AAA形成,所述C57 BL/6 J小鼠具有与LDLR缺陷小鼠相当的AAA严重性。因此,AAV.mPCSK9D377Y感染极大地加速了使用AngII诱导的AAA对感兴趣的基因的研究。这篇评论提供了这种方法的简要技术指南,并讨论了其在AAA研究中使用的利弊。
Angiotensin II (AngII) infusion in mice has been used widely to investigate mechanisms of abdominal aortic aneurysms (AAAs). To achieve a high incidence of AngII-induced AAAs, mice should be hypercholesterolemic. Therefore, either low-density lipoprotein receptor (LDLR) or apolipoprotein E deficiency have been used as a hypercholesterolemic background. However, it is a time-consuming and expensive process to generate compound deficient strains that have either an LDLR or apolipoprotein E deficient background. Proprotein convertase subtilisin/kexin type 9 (PCSK9) facilitates the degradation of LDL receptors. Previous studies demonstrated profound increases of plasma cholesterol concentrations after a single intraperitoneal injection of adeno-associated viruses (AAV) expressing a gain-of-function mutation of mouse PCSK9 (AAV.mPCSK9D377Y) in C57BL/6J mice fed a Western diet. Of note, injection of AAV.mPCSK9D377Y augmented AngII-induced AAA formation in C57BL/6J mice that had comparable severity of AAAs to LDLR deficient mice. Thus, AAV.mPCSK9D377Y infection greatly expedites studies on a gene of interest using AngII-induced AAAs. This commentary provides a brief technical guide of this approach and discusses the pros and cons of its use in AAA research.
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