NFAT5 expression in bone marrow-derived cells enhances atherosclerosis and drives macrophage migration.

NFAT5 expression in bone marrow-derived cells enhances atherosclerosis and drives macrophage migration.
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DOI:
10.3389/fphys.2012.00313
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发表时间:
2012
影响因子:
4
通讯作者:
Wamhoff BR
Wamhoff BR
中科院分区:
医学2区
文献类型:
--
作者:
Halterman JA;Kwon HM;Leitinger N;Wamhoff BR

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目的:我们以前已经表明,转录因子,活化T细胞核因子5(NFAT 5),调节血管平滑肌细胞表型调制,但NFAT 5在动脉粥样硬化中的作用是未知的。我们的主要目的是确定骨髓(BM)源性细胞中NFAT 5的表达是否改变动脉粥样硬化的发展和巨噬细胞功能。方法和结果:生成NFAT 5 +/−ApoE−/−小鼠用于体内动脉粥样硬化研究。在高脂肪饮食喂养后,胸主动脉的正面分析确定全基因组NFAT 5单倍不足使动脉粥样硬化病变形成减少73%。骨髓移植研究显示,将NFAT 5 +/−ApoE−/−骨髓移植到NFAT 5 +/+ApoE−/−小鼠中导致病变形成减少86%。BM衍生的巨噬细胞的体外功能分析表明,NFAT 5是巨噬细胞迁移所必需的,巨噬细胞迁移是动脉粥样硬化传播中的关键事件。结论:我们已经鉴定出BM衍生细胞中的NFAT 5是血管系统中动脉粥样硬化病变形成和巨噬细胞功能的正调节剂。
Objective: We have previously shown that the transcription factor, nuclear factor of activated T-cells 5 (NFAT5), regulates vascular smooth muscle cell phenotypic modulation, but the role of NFAT5 in atherosclerosis is unknown. Our main objective was to determine if NFAT5 expression in bone marrow (BM)-derived cells altered atherosclerotic development and macrophage function. Methods and Results: NFAT5+/−ApoE−/− mice were generated for in vivo atherosclerosis studies. Following high fat diet feeding, en face analysis of the thoracic aorta established that genome-wide NFAT5 haploinsufficiency reduced atherosclerotic lesion formation by 73%. BM transplant studies revealed that transplantation of NFAT5+/−ApoE−/− marrow into NFAT5+/+ApoE−/− mice resulted in a similar 86% reduction in lesion formation. In vitro functional analysis of BM-derived macrophages demonstrated that NFAT5 is required for macrophage migration, which is a key event in the propagation of atherosclerosis. Conclusion: We have identified NFAT5 in BM-derived cells as a positive regulator of atherosclerotic lesion formation and macrophage function in the vasculature.
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