6533b7cffe1ef96bd12585cf

RESEARCH PRODUCT

Tif1γ regulates the TGF-β1 receptor and promotes physiological aging of hematopoietic stem cells.

Laetitia Saint-paulRomain Z. MartinAnne LargeotArlette HammannRonan QuéréMarie-lorraine ChretienJean-noël BastieVirginie CarmignacLaurent DelvaJean-paul Pais De Barros

subject

AgingMyeloidReceptor Transforming Growth Factor-beta Type IReceptors Cell SurfaceCell SeparationBiologyProtein Serine-Threonine KinasesTransforming Growth Factor beta1MiceSignaling Lymphocytic Activation Molecule Family Member 1Antigens CDmedicineAnimalsMyeloid CellsRNA MessengerPolyubiquitinTranscription factorCellular SenescenceRegulation of gene expressionMultidisciplinaryUbiquitinationhemic and immune systemsBiological SciencesHematopoietic Stem CellsCell biologyHematopoiesisHaematopoiesismedicine.anatomical_structurePhysiological AgingPhenotypeGene Expression RegulationSignal transductionStem cellCell agingReceptors Transforming Growth Factor betaSignal TransductionTranscription Factors

description

The hematopoietic system declines with age. Myeloid-biased differentiation and increased incidence of myeloid malignancies feature aging of hematopoietic stem cells (HSCs), but the mechanisms involved remain uncertain. Here, we report that 4-mo-old mice deleted for transcription intermediary factor 1γ (Tif1γ) in HSCs developed an accelerated aging phenotype. To reinforce this result, we also show that Tif1γ is down-regulated in HSCs during aging in 20-mo-old wild-type mice. We established that Tif1γ controls TGF-β1 receptor (Tgfbr1) turnover. Compared with young HSCs, Tif1γ(-/-) and old HSCs are more sensitive to TGF-β signaling. Importantly, we identified two populations of HSCs specifically discriminated by Tgfbr1 expression level and provided evidence of the capture of myeloid-biased (Tgfbr1(hi)) and myeloid-lymphoid-balanced (Tgfbr1(lo)) HSCs. In conclusion, our data provide a new paradigm for Tif1γ in regulating the balance between lymphoid- and myeloid-derived HSCs through TGF-β signaling, leading to HSC aging.

yearjournalcountryeditionlanguage
2014-07-09Proceedings of the National Academy of Sciences of the United States of America
10.1073/pnas.1405546111https://pubmed.ncbi.nlm.nih.gov/25002492