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粒细胞集落刺激因子受体 (G-CSFR) 在调节髓样分化中与维甲酸受体 (RARs) 相互作用。

The granulocyte-colony stimulating factor receptor (G-CSFR) interacts with retinoic acid receptors (RARs) in the regulation of myeloid differentiation.

机构信息

Research Division, Peter MacCallum Cancer Centre, East Melbourne, Victoria, Australia.

出版信息

J Leukoc Biol. 2013 Feb;93(2):235-43. doi: 10.1189/jlb.1211609. Epub 2012 Nov 7.

DOI:10.1189/jlb.1211609
PMID:23136256
Abstract

The key roles of RARs and G-CSFR in the regulation of granulopoiesis have been well-documented. In this study, we sought to investigate the interaction between G-CSFR and RARs in myeloid differentiation of adult mice through conditional deletion of RARα or RARγ on a G-CSFR(-/-) background and by pharmacological intervention of WT and G-CSFR(-/-) mice with a pan-RAR inverse agonist, NRX194310. Our findings show that residual granulopoiesis still persists in mice doubly null for G-CSFR and RARα or RARγ, confirming that RARs and G-CSFR are dispensable in maintaining residual granulopoiesis. Moreover, an increase in mature myeloid cells was seen in the conditional RARγ(Δ/Δ) mice and WT mice treated with NRX194310, likely mediated through increased G-CSF production. However, with the loss of G-CSFR, this expansion in granulopoiesis was attenuated, supporting the hypothesis that G-CSFR signaling interacts with RARs in the regulation of myeloid differentiation.

摘要

RARs 和 G-CSFR 在粒细胞生成调控中的关键作用已得到充分证实。在这项研究中,我们试图通过在 G-CSFR(-/-)背景下条件性缺失 RARα 或 RARγ,以及用泛 RAR 反向激动剂 NRX194310 对 WT 和 G-CSFR(-/-)小鼠进行药理干预,来研究 G-CSFR 和 RARs 在成年小鼠髓系分化中的相互作用。我们的研究结果表明,在 G-CSFR 和 RARα 或 RARγ 双重缺失的小鼠中,仍存在残留的粒细胞生成,这证实了 RARs 和 G-CSFR 在维持残留粒细胞生成中是可有可无的。此外,在条件性 RARγ(Δ/Δ)小鼠和用 NRX194310 治疗的 WT 小鼠中,成熟的髓样细胞数量增加,这可能是通过增加 G-CSF 产生介导的。然而,随着 G-CSFR 的丧失,这种粒细胞生成的扩张被减弱,支持了 G-CSFR 信号与 RARs 相互作用调节髓系分化的假说。

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