MCM8-and MCM9 Deficiencies Cause Lifelong Increased Hematopoietic DNA Damage Driving p53- Dependent Myeloid Tumors - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Cell Reports Année : 2019

MCM8-and MCM9 Deficiencies Cause Lifelong Increased Hematopoietic DNA Damage Driving p53- Dependent Myeloid Tumors

Résumé

Hematopoiesis is particularly sensitive to DNA damage. Myeloid tumor incidence increases in patients with DNA repair defects and after chemotherapy. It is not known why hematopoietic cells are highly vulnerable to DNA damage. Addressing this question is complicated by the paucity of mouse models of hematopoietic malignancies due to defective DNA repair. We show that DNA repair-deficient Mcm8- and Mcm9-knockout mice develop myeloid tumors, phenocopying prevalent myelodysplastic syndromes. We demonstrate that these tumors are preceded by a lifelong DNA damage burden in bone marrow and that they acquire proliferative capacity by suppressing signaling of the tumor suppressor and cell cycle controller RB, as often seen in patients. Finally, we found that absence of MCM9 and the tumor suppressor Tp53 switches tumorigenesis to lymphoid tumors without precedent myeloid malignancy. Our results demonstrate that MCM8/9 deficiency drives myeloid tumor development and establishes a DNA damage burdened mouse model for hematopoietic malignancies.
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Dates et versions

hal-02397140 , version 1 (06-12-2019)

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Paternité - Pas d'utilisation commerciale - Pas de modification

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Malik Lutzmann, Florence F. Bernex, Cindy da Costa de Jesus, Dana Hodroj, Caroline Marty, et al.. MCM8-and MCM9 Deficiencies Cause Lifelong Increased Hematopoietic DNA Damage Driving p53- Dependent Myeloid Tumors. Cell Reports, 2019, 28 (11), pp.2851 - 2865. ⟨10.1016/j.celrep.2019.07.095⟩. ⟨hal-02397140⟩
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