BRAFV600E-induced senescence drives Langerhans cell histiocytosis pathophysiology
Open accessAbstract
Langerhans cell histiocytosis (LCH) is a potentially fatal condition characterized by granulomatous lesions with characteristic clonal mononuclear phagocytes (MNPs) harboring activating somatic mutations in mitogen-activated protein kinase (MAPK) pathway genes, most notably BRAF V600E. We recently discovered that the BRAF V600E mutation can also affect multipotent hematopoietic progenitor cells (HPCs) in multisystem LCH disease. How the BRAF V600E mutation in HPCs leads to LCH is not known. Here we show that enforced expression of the BRAF V600E mutation in early mouse and human multipotent HPCs induced a senescence program that led to HPC growth arrest, apoptosis resistance and a senescence-associated secretory phenotype (SASP). SASP, in turn, promoted HPC skewing toward the MNP lineage, leading to the accumulation of senescent MNPs in tissue and the formation of LCH lesions. Accordingly, elimination of senescent cells using INK-ATTAC transgenic mice, as well as pharmacologic blockade of SASP, improved LCH disease in mice. These results identify senescent cells as a new target for the treatment of LCH.
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- Authors
- Bigenwald, C., Le Berichel, J., Wilk, C. M., Chakraborty, R., Chen, S. T., Tabachnikova, A., Mancusi, R., Abhyankar, H., Casanova-Acebes, M., Laface, I., Akturk, G., Jobson, J., Karoulia, Z., Martin, J. C., Grout, J., Rafiei, A., Lin, H., Manz, M. G., Baccarini, A., Poulikakos, P. I., Brown, B. D., Gnjatic, S., Lujambio, A., McClain, K. L., Picarsic, J., Allen, C. E., & Merad, M.
- Affiliations
- Tisch Cancer Institute (US)
- Baylor College of Medicine (US)
- University Hospital Zurich (CH)
- Cincinnati Children's Hospital Medical Center (US)
- ORCID
- Bigenwald, Camille
- Wilk, C. Matthias
- Chakraborty, Rikhia
- Chen, Steven T.
- Tabachnikova, Alexandra
- Mancusi, Rebecca
- Abhyankar, Harshal
- Akturk, Guray
- Karoulia, Zoi
- Martin, Jerome C.
- Grout, John
- Lin, Howard
- Manz, Markus G.
- Baccarini, Alessia
- Poulikakos, Poulikos I.
- Brown, Brian D.
- Gnjatic, Sacha
- Lujambio, Amaia
- McClain, Kenneth L.
- Picarsic, Jennifer
- Allen, Carl E.
- Merad, Miriam
- Venue
- Nature Medicine
- Published
- 2021-05
- Volume
- 27
- Issue
- 5
- Pages
- 851-861
- ISSN
- 1078-8956 (ISSN-L)
- 1546-170X
- PMC
- PMC9295868
- OpenAlex
- W3124631467
- Cited by
- 83
- References
- 37
- Citations by year
- 2026: 9 · 2025: 18 · 2024: 21 · 2023: 14 · 2022: 17 · 2021: 4
- FWCI
- 8.80
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Nature Medicine (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (186740)
- National Cancer Institute (R01CA204314, R01CA240362, R01CA190400, R01CA154947, U24CA224319)
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (R33HD105593)
- Topics
- Health Sciences › Medicine › Physiology › Histiocytic Disorders and Treatments
- Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
- Life Sciences › Immunology and Microbiology › Immunology › Mast cells and histamine
- Keywords
- Langerhans cell histiocytosis, BrafV600E, cellular senescence, hematopoietic progenitor cells, senescence-associated secretory phenotype, MAPK signaling, senolytics, apoptosis resistance, granuloma
- MeSH terms
- Animals, Hematopoietic Stem Cells, Histiocytosis, Langerhans-Cell, Humans, Langerhans Cells, Mice, Inbred C57BL, Mice, Transgenic, Cytokines, Cellular Senescence, Apoptosis, Sirolimus, Proto-Oncogene Proteins B-raf, Cell Proliferation, Mice, TOR Serine-Threonine Kinases
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