Angiotensin II type 2 receptor signaling attenuates aortic aneurysm in mice through ERK antagonism.

Angiotensin II type 2 receptor signaling attenuates aortic aneurysm in mice through ERK antagonism.
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DOI:
10.1126/science.1192152
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发表时间:
2011-04-15
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Dietz HC
Dietz HC
中科院分区:
其他
文献类型:
--
作者:
Habashi JP;Doyle JJ;Holm TM;Aziz H;Schoenhoff F;Bedja D;Chen Y;Modiri AN;Judge DP;Dietz HC

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血管紧张素II(AngII)介导主动脉瘤的进展,但其1型(AT 1)和2型(AT 2)受体的相对贡献仍然未知。我们发现,AT 2表达的丧失加速了马凡氏综合征(MFS)小鼠模型主动脉的异常生长和破裂。选择性AT 1受体阻滞剂(ARB)氯沙坦消除了小鼠动脉瘤的进展;完全保护需要完整的AT 2信号。血管紧张素转换酶抑制剂(ACEi)依那普利,限制通过两个受体的信号,是不太有效的。两种药物均减弱主动脉中的典型转化生长因子-β(TGFβ)信号传导,但氯沙坦通过允许通过AT 2持续信号传导,独特地抑制TGFβ介导的细胞外信号调节激酶(ERK)活化。这些数据突出了AT 2信号传导的保护性质,并可能为MFS和相关疾病的治疗选择提供信息。
Angiotensin II (AngII) mediates progression of aortic aneurysm, but the relative contribution of its type 1 (AT1) and type 2 (AT2) receptors remains unknown. We show that loss of AT2 expression accelerates the aberrant growth and rupture of the aorta in a mouse model of Marfan syndrome (MFS). The selective AT1 receptor blocker (ARB) losartan abrogated aneurysm progression in the mice; full protection required intact AT2 signaling. The angiotensin-converting enzyme inhibitor (ACEi) enalapril, which limits signaling through both receptors, was less effective. Both drugs attenuated canonical transforming growth factor–β (TGFβ) signaling in the aorta, but losartan uniquely inhibited TGFβ-mediated activation of extracellular signal–regulated kinase (ERK), by allowing continued signaling through AT2. These data highlight the protective nature of AT2 signaling and potentially inform the choice of therapies in MFS and related disorders.
DOI: 10.1126/science.1192149
发表时间: 2011-04-15
期刊: Science (New York, N.Y.)
影响因子: --
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Holm TM;Habashi JP;Doyle JJ;Bedja D;Chen Y;van Erp C;Lindsay ME;Kim D;Schoenhoff F;Cohn RD;Loeys BL;Thomas CJ;Patnaik S;Marugan JJ;Judge DP;Dietz HC
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