c-Myb Exacerbates Atherosclerosis through Regulation of Protective IgM-Producing Antibody-Secreting Cells.

c-Myb Exacerbates Atherosclerosis through Regulation of Protective IgM-Producing Antibody-Secreting Cells.
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c-Myb 通过调节保护性 IgM 产生抗体分泌细胞加剧动脉粥样硬化

DOI:
10.1016/j.celrep.2019.04.090
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发表时间:
2019
期刊:
影响因子:
8.8
通讯作者:
Stampfli MR
Stampfli MR
中科院分区:
生物学1区
文献类型:
--
作者:
Shikatani EA;Besla R;Ensan S;Upadhye A;Khyzha N;Emoto T;Chiu F;Degousee N;Moreau JM;Perry HM;Thayaparan D;Cheng HS;Pacheco S;Smyth D;Noyan H;Zavitz CCJ;Bauer CMT;Hilgendorf I;Libby P;Swirski FK;Gommerman JL;Fish JE;Stampfli MR

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在动脉粥样硬化中,控制炎症转录调节的机制仍然很大程度上未知。在这里,我们确定了核转录因子c-Myb作为一个重要的调解人的动脉粥样硬化性疾病的小鼠。易患动脉粥样硬化的动物在高胆固醇饮食中表现出骨髓中c-Mybin水平的增加。使用携带c-Myb亚型等位基因或c-Myb在B细胞谱系中优先缺失的小鼠显示,c-Myb B直接通过其对B淋巴细胞的作用增强动脉粥样硬化。c-Myb活性降低可防止致动脉粥样硬化B2细胞的扩增,但与IgM产生抗体分泌细胞(IgM-ASC)数量增加和动脉粥样硬化保护性氧化低密度脂蛋白(OxLDL)特异性IgM抗体水平升高有关。转录谱分析显示,c-MyB对B细胞功能的影响有限,但在维持骨髓中的B细胞祖细胞群中是不可或缺的。因此,c-MyB的靶向破坏有益地调节心血管疾病中B细胞的复杂生物学。
Mechanisms that govern transcriptional regulation of inflammation in atherosclerosis remain largely unknown. Here, we identify the nuclear transcription factor c-Myb as an important mediator of atherosclerotic disease in mice. Atherosclerosis-prone animals fed a diet high in cholesterol exhibit increased levels of c-Mybin the bone marrow. Use of mice that either harbor a c-Mybhypomorphic allele or where c-Mybhas been preferentially deleted in B cell lineages revealed that c-Myb potentiates atherosclerosis directly through its effects on B lymphocytes. Reduced c-Myb activity prevents the expansion of atherogenic B2 cells yet associates with increased numbers of IgM-producing antibody-secreting cells (IgM-ASCs) and elevated levels of atheroprotective oxidized low-density lipoprotein (OxLDL)-specific IgM antibodies. Transcriptional profiling revealed that c-Myb has a limited effect on B cell function but is integral in maintaining B cell progenitor populations in the bone marrow. Thus, targeted disruption of c-Myb beneficially modulates the complex biology of B cells in cardiovascular disease.
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