首页> 外文期刊>American Journal of Physiology >Decreased hematopoiesis in bone marrow of mice with congestive heart failure.
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Decreased hematopoiesis in bone marrow of mice with congestive heart failure.

机译:充血性心力衰竭小鼠骨髓中的造血功能降低。

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Patients with heart failure are predisposed to infections and anemia, possibly due to reduced hematopoiesis. The proinflammatory cytokine tumor necrosis factor-alpha (TNF-alpha) is increased in heart failure, and it inhibits normal hematopoiesis, partly due to apoptosis through the effector molecule Fas. We examined bone marrow progenitor cells of mice with heart failure induced by acute myocardial infarction. The fraction of progenitor cells in mice with heart failure was only approximately 40% of control. Measured with in vitro clonal assays, the proliferative capacity of the progenitor cells in mice with heart failure was reduced to approximately 50% of control. Flow cytometry with specific markers revealed a threefold increase in apoptosis among progenitor cells from mice with heart failure. In these mice, TNF-alpha/Fas expression was increased in bone marrow natural killer (NK) and T cells, and these lymphocytes showed increased cytolytic activity in vitro against progenitor cells. We conclude that the TNF-alpha/Fas pathway in lymphocytes is activated in the bone marrow during heart failure, which may play a pathogenic role in the observed decrease in hematopoiesis.
机译:心力衰竭患者易患感染和贫血,可能是由于造血功能降低所致。在心力衰竭中,促炎性细胞因子肿瘤坏死因子-α(TNF-alpha)增加,并且它抑制正常的造血作用,部分是由于通过效应分子Fas引起的细胞凋亡。我们检查了急性心肌梗死所致心力衰竭小鼠的骨髓祖细胞。患有心力衰竭的小鼠中祖细胞的比例仅为对照的约40%。用体外克隆测定法测量,患有心力衰竭的小鼠中祖细胞的增殖能力降低到对照的约50%。具有特定标记的流式细胞仪显示,患有心力衰竭的小鼠的祖细胞之间的凋亡增加了三倍。在这些小鼠中,TNF-α/ Fas表达在骨髓自然杀伤(NK)和T细胞中增加,并且这些淋巴细胞在体外对祖细胞的溶细胞活性增强。我们得出结论,在心力衰竭期间,淋巴细胞中的TNF-α/ Fas途径在骨髓中被激活,这可能在所观察到的造血功能降低中起着致病作用。

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