Activation of the Flt3 signal transduction cascade rescues and enhances type I interferon-producing and dendritic cell development
Open accessAbstract
Flt3 ligand (Flt3L) is a nonredundant cytokine in type I interferon–producing cell (IPC) and dendritic cell (DC) development, and IPC and DC differentiation potential is confined to Flt3+ hematopoietic progenitor cells. Here, we show that overexpression of human Flt3 in Flt3− (Flt3−Lin−IL-7Rα−Thy1.1−c-Kit+) and Flt3+ (Flt3+Lin−IL-7Rα−Thy1.1−c-Kit+) hematopoietic progenitors rescues and enhances their IPC and DC differentiation potential, respectively. In defined hematopoietic cell populations, such as Flt3− megakaryocyte/erythrocyte-restricted progenitors (MEPs), enforced Flt3 signaling induces transcription of IPC, DC, and granulocyte/macrophage (GM) development–affiliated genes, including STAT3, PU.1, and G-/M-/GM-CSFR, and activates differentiation capacities to these lineages. Moreover, ectopic expression of Flt3 downstream transcription factors STAT3 or PU.1 in Flt3− MEPs evokes Flt3 receptor expression and instructs differentiation into IPCs, DCs, and myelomonocytic cells, whereas GATA-1 expression and consecutive megakaryocyte/erythrocyte development is suppressed. Based on these data, we propose a demand-regulated, cytokine-driven DC and IPC regeneration model, in which high Flt3L levels initiate a self-sustaining, Flt3-STAT3– and Flt3-PU.1–mediated IPC and DC differentiation program in Flt3+ hematopoietic progenitor cells.
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Tcf4/E2-2 is transcriptionally upregulated by STAT3.
“Tcf4/E2-2, another transcriptional regulator of plasmacytoid DC development, is also transcriptionally upregulated by STAT3”
From Targeting Janus Kinases and Signal Transducer and Activator of Transcription 3 To Treat Inflammation, Fibrosis, and Cancer: Rationale, Progress, and Caution (2020) · cites this paper as Onai et al., 2006
The Results section reports that enforced STAT3 expression increased Flt3 mRNA in MEPs, not Tcf4/E2-2. Searches for Tcf4 and E2-2 found no passage in our copy addressing whether STAT3 upregulates that gene. Page numbers were not available in the indexed passages. (LLM, conf=0.78)
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Development of Monocytes, Macrophages, and Dendritic Cells
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“Tcf4/E2-2, another transcriptional regulator of plasmacytoid DC development, is also transcriptionally upregulated by STAT3 (Panopoulos et al., 2002; D’Amico and Wu, 2003; Onai et al., 2006; Hegde et al., 2009).”
BackgroundCarotta, S., Dakic, A., D'Amico, A., Pang, S. H. M., Greig, K. T., Nutt, S. L., & Wu, L. (2010) · Immunity · doi:10.1016/j.immuni.2010.05.005 · Cited by 279 · see citing works
Biswas, M., Sarkar, D., Kumar, S. R. P., Nayak, S., Rogers, G. L., Markusic, D. M., Liao, G., Terhorst, C., & Herzog, R. W. (2015) · Blood · doi:10.1182/blood-2014-09-599266 · Cited by 70 · see citing works
- Authors
- Onai, N., Obata-Onai, A., Tussiwand, R., Lanzavecchia, A., & Manz, M. G.
- Affiliations
- Institute for Research in Biomedicine (CH)
- Venue
- The Journal of Experimental Medicine
- Publisher
- Rockefeller University Press
- Published
- 2006-01-17
- Volume
- 203
- Issue
- 1
- Pages
- 227-238
- ISSN
- 0022-1007 (ISSN-L)
- 1540-9538
- PMC
- PMC2118073
- OpenAlex
- W2101595031
- Cited by
- 156
- References
- 8
- Citations by year
- 2026: 1 · 2025: 4 · 2024: 3 · 2023: 3 · 2022: 4 · 2021: 4 · 2020: 4 · 2019: 7 · 2018: 8 · 2017: 10 · 2016: 4 · 2015: 8 · 2014: 9 · 2013: 16 · 2012: 13
- FWCI
- 4.43
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- The Journal of Experimental Medicine (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-sa)
- PubMed Central (publishedVersion, cc-by-nc-sa)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
- Health Sciences › Medicine › Oncology › Cytokine Signaling Pathways and Interactions
- Health Sciences › Medicine › Hematology › Hematopoietic Stem Cell Transplantation
- Keywords
- FLT3, Flt3 ligand, dendritic cell development, hematopoietic progenitor cells, megakaryocyte-erythrocyte progenitors, STAT3, PU.1, GATA-1, GM-CSF receptor, myelomonocytic differentiation, hematopoietic differentiation
- MeSH terms
- Proto-Oncogene Protein Spi-1, Animals, Cell Differentiation, Dendritic Cells, Hematopoietic Stem Cells, Humans, Interferon Type I, Mice, Inbred BALB C, Mice, Inbred C57BL, Proto-Oncogene Proteins, Signal Transduction, Trans-Activators, STAT3 Transcription Factor, Mice, fms-Like Tyrosine Kinase 3
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