Hematopoietic loss of Y chromosome leads to cardiac fibrosis and heart failure mortality.

Hematopoietic loss of Y chromosome leads to cardiac fibrosis and heart failure mortality.
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DOI:
10.1126/science.abn3100
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发表时间:
2022-07-15
期刊:
Science (New York, N.Y.)
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其他
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Y染色体造血镶嵌丢失(mLOY)与男性死亡率和年龄相关疾病的风险增加有关,但因果关系和机制尚未建立。在这里,我们发现用缺乏Y染色体的骨髓细胞重建的雄性小鼠显示死亡率增加和与年龄相关的促纤维化病理,包括心脏功能降低。缺乏Y染色体的心脏巨噬细胞表现出向更纤维化表型的极化,用转化生长因子β1中和抗体治疗可改善mLOY小鼠的心功能障碍。一项前瞻性研究显示,血液中的mLOY与心血管疾病和心力衰竭相关死亡率的风险增加相关。总之,这些结果表明,造血mLOY因果地有助于纤维化,心脏功能障碍和死亡率的男性。
Hematopoietic mosaic loss of Y chromosome (mLOY) is associated with increased risk of mortality and age-related diseases in men, but the causal and mechanistic relationships have yet to be established. Here, we show that male mice reconstituted with bone marrow cells lacking the Y chromosome display increased mortality and age-related profibrotic pathologies including reduced cardiac function. Cardiac macrophages lacking the Y chromosome exhibited polarization toward a more fibrotic phenotype, and treatment with a transforming growth factor β1–neutralizing antibody ameliorated cardiac dysfunction in mLOY mice. A prospective study revealed that mLOY in blood is associated with an increased risk for cardiovascular disease and heart failure–associated mortality. Together, these results indicate that hematopoietic mLOY causally contributes to fibrosis, cardiac dysfunction, and mortality in men.
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