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Wnt signaling couples G2 phase control with differentiation during hematopoiesis in Drosophila
Developmental Cell ( IF 10.7 ) Pub Date : 2024-06-11 , DOI: 10.1016/j.devcel.2024.05.023 Lauren M Goins 1 , Juliet R Girard 2 , Bama Charan Mondal 3 , Sausan Buran 4 , Chloe C Su 5 , Ruby Tang 5 , Titash Biswas 5 , Jessica A Kissi 1 , Utpal Banerjee 6
Developmental Cell ( IF 10.7 ) Pub Date : 2024-06-11 , DOI: 10.1016/j.devcel.2024.05.023 Lauren M Goins 1 , Juliet R Girard 2 , Bama Charan Mondal 3 , Sausan Buran 4 , Chloe C Su 5 , Ruby Tang 5 , Titash Biswas 5 , Jessica A Kissi 1 , Utpal Banerjee 6
Affiliation
During homeostasis, a critical balance is maintained between myeloid-like progenitors and their differentiated progeny, which function to mitigate stress and innate immune challenges. The molecular mechanisms that help achieve this balance are not fully understood. Using genetic dissection in Drosophila , we show that a Wnt6/EGFR-signaling network simultaneously controls progenitor growth, proliferation, and differentiation. Unlike G1-quiescence of stem cells, hematopoietic progenitors are blocked in G2 phase by a β-catenin-independent (Wnt/STOP) Wnt6 pathway that restricts Cdc25 nuclear entry and promotes cell growth. Canonical β-catenin-dependent Wnt6 signaling is spatially confined to mature progenitors through localized activation of the tyrosine kinases EGFR and Abelson kinase (Abl), which promote nuclear entry of β-catenin and facilitate exit from G2. This strategy combines transcription-dependent and -independent forms of both Wnt6 and EGFR pathways to create a direct link between cell-cycle control and differentiation. This unique combinatorial strategy employing conserved components may underlie homeostatic balance and stress response in mammalian hematopoiesis.
中文翻译:
Wnt 信号转导将 G2 期控制与果蝇造血过程中的分化相结合
在体内平衡过程中,髓样祖细胞与其分化的后代之间保持关键平衡,其功能是减轻压力和先天免疫挑战。有助于实现这种平衡的分子机制尚不完全清楚。利用果蝇的遗传解剖,我们表明 Wnt6/EGFR 信号网络同时控制祖细胞的生长、增殖和分化。与干细胞的 G1 静止不同,造血祖细胞在 G2 期被 β-catenin 非依赖性 (Wnt/STOP) Wnt6 通路阻断,该通路限制了 Cdc25 核进入并促进细胞生长。经典 β-catenin 依赖性 Wnt6 信号转导通过酪氨酸激酶 EGFR 和 Abelson 激酶 (Abl) 的局部激活在空间上局限于成熟祖细胞,这些激酶促进 β-catenin 的核进入并促进 G2 的退出。该策略结合了 Wnt6 和 EGFR 通路的转录依赖性和非依赖性形式,在细胞周期控制和分化之间建立直接联系。这种采用保守成分的独特组合策略可能是哺乳动物造血中稳态平衡和应激反应的基础。
更新日期:2024-06-11
中文翻译:
Wnt 信号转导将 G2 期控制与果蝇造血过程中的分化相结合
在体内平衡过程中,髓样祖细胞与其分化的后代之间保持关键平衡,其功能是减轻压力和先天免疫挑战。有助于实现这种平衡的分子机制尚不完全清楚。利用果蝇的遗传解剖,我们表明 Wnt6/EGFR 信号网络同时控制祖细胞的生长、增殖和分化。与干细胞的 G1 静止不同,造血祖细胞在 G2 期被 β-catenin 非依赖性 (Wnt/STOP) Wnt6 通路阻断,该通路限制了 Cdc25 核进入并促进细胞生长。经典 β-catenin 依赖性 Wnt6 信号转导通过酪氨酸激酶 EGFR 和 Abelson 激酶 (Abl) 的局部激活在空间上局限于成熟祖细胞,这些激酶促进 β-catenin 的核进入并促进 G2 的退出。该策略结合了 Wnt6 和 EGFR 通路的转录依赖性和非依赖性形式,在细胞周期控制和分化之间建立直接联系。这种采用保守成分的独特组合策略可能是哺乳动物造血中稳态平衡和应激反应的基础。