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首页> 外文期刊>Biochemical and Biophysical Research Communications >Paracrine CCL17 and CCL22 signaling regulates hematopoietic stem/progenitor cell migration and retention in mouse fetal liver
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Paracrine CCL17 and CCL22 signaling regulates hematopoietic stem/progenitor cell migration and retention in mouse fetal liver

机译:旁静脉CCL17和CCL22信号传导调节造血干燥/祖细胞迁移和在小鼠胎儿肝脏中的保留

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Fetal liver (FL) is the major embryonic hematopoietic organ and a site where circulating hematopoietic stem/progenitor cells (HSPCs) reside. However, HSPC migration/retention mechanisms in FL remain unclear. A chemokine screen revealed that the CCR4 ligands CCL17 and CCL22 are highly expressed in mouse embryonic day (E) 12.5 FL. Flow cytometric analysis confirmed CCR4 expression in FL HSPCs. To identify sources of CCL17 and CCL22, we fractionated FL into various cell types and found that Cc117 and Cc122 were predominantly expressed in HPCs/matured HCs. In vitro cell migration analysis confirmed enhanced HSPC migration in the presence of HPCs/matured HCs. Furthermore, exo-utero injection of anti-CCR4 neutralizing antibody into pregnant mice significantly reduced the number of FL HSPCs in embryos. These data demonstrate a paracrine mechanism by which HSPC migration/retention is regulated by CCL17 and CCL22 secreted from HPCs or matured HCs in FL. (C) 2020 Elsevier Inc. All rights reserved.
机译:胎儿肝脏(FL)是主要的胚胎造血器官和循环造血干/祖细胞(HSPCS)所在的部位。但是,流体中的HSPC迁移/保留机制仍不清楚。趋化因子筛网显示CCR4配体CCl17和CCL22在小鼠胚胎日(E)12.5F中高度表达。流式细胞术分析证实了FL HSPC中的CCR4表达。为了鉴定CCL17和CCL22的来源,我们将流入各种细胞类型分离成各种细胞类型,发现CC117和CC122主要以HPC /成熟的HCS表示。体外细胞迁移分析证实了HPC /成熟HPCS存在的增强的HSPC迁移。此外,Exo-Utero注射抗CCR4中和抗体成怀孕小鼠显着降低了胚胎中的FL HSPC的数量。这些数据证明了通过在FL中的HPC或成熟的HCS中分泌的CCL17和CCL22调节HSPC迁移/保留的帕普碱机制。 (c)2020 Elsevier Inc.保留所有权利。

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