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BATF2 promotes HSC myeloid differentiation by amplifying IFN response mediators during chronic infection
iScience ( IF 4.6 ) Pub Date : 2023-01-27 , DOI: 10.1016/j.isci.2023.106059
Duy T Le 1, 2 , Marcus A Florez 2, 3 , Pawel Kus 4 , Brandon T Tran 2, 5 , Bailee Kain 2, 3 , Yingmin Zhu 6 , Kurt Christensen 6 , Antrix Jain 7 , Anna Malovannaya 7, 8 , Katherine Y King 1, 2
iScience ( IF 4.6 ) Pub Date : 2023-01-27 , DOI: 10.1016/j.isci.2023.106059
Duy T Le 1, 2 , Marcus A Florez 2, 3 , Pawel Kus 4 , Brandon T Tran 2, 5 , Bailee Kain 2, 3 , Yingmin Zhu 6 , Kurt Christensen 6 , Antrix Jain 7 , Anna Malovannaya 7, 8 , Katherine Y King 1, 2
Affiliation
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Basic leucine zipper ATF-like transcription factor 2 (BATF2), an interferon-activated immune response regulator, is a key factor responsible for myeloid differentiation and depletion of HSC during chronic infection. To delineate the mechanism of BATF2 function in HSCs, we assessed KO mice during chronic infection and found that they produced less pro-inflammatory cytokines, less immune cell recruitment to the spleen, and impaired myeloid differentiation with better preservation of HSC capacity compared to WT. Co-IP analysis revealed that BATF2 forms a complex with JUN to amplify pro-inflammatory signaling pathways including CCL5 during infection. Blockade of CCL5 receptors phenocopied KO differentiation defects, whereas treatment with recombinant CCL5 was sufficient to rescue IFNγ-induced myeloid differentiation and recruit more immune cells to the spleen in KO mice. By revealing the mechanism of BATF2-induced myeloid differentiation of HSCs, these studies elucidate potential therapeutic strategies to boost immunity while preserving HSC function during chronic infection.
中文翻译:
BATF2在慢性感染期间通过放大IFN反应介质促进HSC骨髓分化
碱性亮氨酸拉链 ATF 样转录因子 2 (BATF2) 是一种干扰素激活的免疫反应调节剂,是慢性感染期间导致骨髓分化和 HSC 耗竭的关键因素。为了描述 BATF2 在 HSC 中的功能机制,我们对慢性感染期间的 KO 小鼠进行了评估,发现与 WT 相比,它们产生的促炎细胞因子较少,脾脏中的免疫细胞募集较少,并且骨髓分化受损,但 HSC 能力得到了更好的保存。 Co-IP 分析显示,BATF2 与 JUN 形成复合物,在感染过程中放大包括 CCL5 在内的促炎信号通路。阻断 CCL5 受体会导致 KO 分化缺陷,而重组 CCL5 治疗足以挽救 IFNγ 诱导的骨髓分化,并将更多免疫细胞招募到 KO 小鼠的脾脏中。通过揭示 BATF2 诱导 HSC 骨髓分化的机制,这些研究阐明了在慢性感染期间增强免疫力同时保留 HSC 功能的潜在治疗策略。
更新日期:2023-01-27
中文翻译:

BATF2在慢性感染期间通过放大IFN反应介质促进HSC骨髓分化
碱性亮氨酸拉链 ATF 样转录因子 2 (BATF2) 是一种干扰素激活的免疫反应调节剂,是慢性感染期间导致骨髓分化和 HSC 耗竭的关键因素。为了描述 BATF2 在 HSC 中的功能机制,我们对慢性感染期间的 KO 小鼠进行了评估,发现与 WT 相比,它们产生的促炎细胞因子较少,脾脏中的免疫细胞募集较少,并且骨髓分化受损,但 HSC 能力得到了更好的保存。 Co-IP 分析显示,BATF2 与 JUN 形成复合物,在感染过程中放大包括 CCL5 在内的促炎信号通路。阻断 CCL5 受体会导致 KO 分化缺陷,而重组 CCL5 治疗足以挽救 IFNγ 诱导的骨髓分化,并将更多免疫细胞招募到 KO 小鼠的脾脏中。通过揭示 BATF2 诱导 HSC 骨髓分化的机制,这些研究阐明了在慢性感染期间增强免疫力同时保留 HSC 功能的潜在治疗策略。