Distinct roles of KLF4 in mesenchymal cell subtypes during lung fibrogenesis.
Distinct roles of KLF4 in mesenchymal cell subtypes during lung fibrogenesis.
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DOI:
10.1038/s41467-021-27499-8
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发表时间:
2021-12-10
影响因子:
16.6
通讯作者:
Greif DM
中科院分区:
文献类型:
--
作者:
Chandran RR;Xie Y;Gallardo-Vara E;Adams T;Garcia-Milian R;Kabir I;Sheikh AQ;Kaminski N;Martin KA;Herzog EL;Greif DM
During lung fibrosis, the epithelium induces signaling to underlying mesenchyme to generate excess myofibroblasts and extracellular matrix; herein, we focus on signaling in the mesenchyme. Our studies indicate that platelet-derived growth factor receptor (PDGFR)-β+ cells are the predominant source of myofibroblasts and Kruppel-like factor (KLF) 4 is upregulated in PDGFR-β+ cells, inducing TGFβ pathway signaling and fibrosis. In fibrotic lung patches, KLF4 is down-regulated, suggesting KLF4 levels decrease as PDGFR-β+ cells transition into myofibroblasts. In contrast to PDGFR-β+ cells, KLF4 reduction in α-smooth muscle actin (SMA)+ cells non-cell autonomously exacerbates lung fibrosis by inducing macrophage accumulation and pro-fibrotic effects of PDGFR-β+ cells via a Forkhead box M1 to C-C chemokine ligand 2—receptor 2 pathway. Taken together, in the context of lung fibrosis, our results indicate that KLF4 plays opposing roles in PDGFR-β+ cells and SMA+ cells and highlight the importance of further studies of interactions between distinct mesenchymal cell types. The pluripotency factor KLF4 has been described as pro-fibrotic or anti-fibrotic in various diseases. Herein, the authors show that during lung fibrosis, these distinct effects can be attributed to mesenchymal cell-type specific functions of KLF4.
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