Endothelial cell-specific expression of serine/threonine kinase 11 modulates dendritic cell differentiation.

Endothelial cell-specific expression of serine/threonine kinase 11 modulates dendritic cell differentiation.
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DOI:
10.1038/s41467-022-28316-6
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发表时间:
2022-02-03
影响因子:
16.6
通讯作者:
Zou MH
Zou MH
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Zhao Q;Han YM;Song P;Liu Z;Yuan Z;Zou MH

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在骨髓中,经典和浆细胞样树突状细胞(DC)由巨噬细胞-DC前体(MDP)通过共同DC前体(CDP)步骤发育而来。这一发育过程从其发生的生态位接受必要的输入,其中包括内皮细胞(EC)和其他细胞类型。本研究表明,在小鼠ECs中,编码肿瘤抑制因子肝激酶b1 (Lkb1)的丝氨酸/苏氨酸激酶11 (Stk11)的靶向缺失导致MDPs向CDPs的分化中断,成熟DC数量严重减少和自发肿瘤发生。在野生型ECs中,Lkb1使聚嘧啶束结合蛋白1 (Ptbp1)苏氨酸138位点磷酸化,从而调节干细胞因子(Scf) mrna前剪接。在缺乏Lkb1的情况下,Scf的外显子6被剪接掉,导致Scf分泌减少。在内皮特异性Stk11敲除小鼠中,腺相关病毒介导的可溶性Scf或拟磷突变体pbp1t138e蛋白编码基因的传递挽救了MDP向CDP分化和DC短缺的缺陷。综上所述,内皮细胞Stk11表达通过调节Scf剪接来调节DC分化,这标志着Stk11-可溶性-Scf轴是DC缺乏综合征的潜在原因。在骨髓中,树突状细胞的发育是由支持细胞如内皮细胞控制的。作者发现,内皮细胞中丝氨酸/苏氨酸激酶11的表达通过调节干细胞因子的分泌来调节树突状细胞前体的分化。
In the bone marrow, classical and plasmacytoid dendritic cells (DC) develop from the macrophage-DC precursor (MDP) through a common DC precursor (CDP) step. This developmental process receives essential input from the niche in which it takes place, containing endothelial cells (EC) among other cell types. Here we show that targeted deletion of serine/threonine kinase 11 (Stk11) encoding tumor suppressor liver kinase b1 (Lkb1) in mouse ECs but not DCs, results in disrupted differentiation of MDPs to CDPs, severe reduction in mature DC numbers and spontaneous tumorigenesis. In wild type ECs, Lkb1 phosphorylates polypyrimidine tract binding protein 1 (Ptbp1) at threonine 138, which regulates stem cell factor (Scf) pre-mRNA splicing. In the absence of Lkb1, exon 6 of Scf is spliced out, leading to the loss of Scf secretion. Adeno-associated-virus-mediated delivery of genes encoding either soluble Scf or the phosphomimetic mutant Ptbp1T138E proteins rescued the defects of MDP to CDP differentiation and DC shortage in the endothelium specific Stk11 knockout mice. In summary, endothelial Stk11 expression regulates DC differentiation via modulation of Scf splicing, marking the Stk11-soluble-Scf axis as a potential cause of DC deficiency syndromes. In the bone marrow, dendritic cell development is governed by supporting cells, such as endothelial cells. Here authors show that expression of serine/threonine kinase 11 in endothelial cells regulates differentiation of dendritic cell precursors via modulating secretion of stem cell factor.
DOI: 10.4049/jimmunol.1601629
发表时间: 2017-03-15
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