Keywords: Tet2 deficiency in hematopoietic cells is associated with greater cardiac dysfunction in murine models of heart failure as a result of elevated IL-1β signaling. Svensson, E. C. et al. Bethesda, MD 20894, Copyright (A) Mutational landscape for somatic variants detected in this elderly cohort. We deeply sequenced 46 genes in normal skin biopsies from 123 healthy donors, from which phenotypic data (including age, pigmentation-related genotype and phenotype) and sun exposure habits were collected. FOIA Mice lacking MHCII and CD4 T cells did not develop disease. Here, we formally tested whether MPD can also arise through a loss of DC function without numerical deficiency. Our results suggest a loss of fidelity in transcription-coupled repair later in life. Figure 1. These mutations confer a risk for hematological cancers and cardiovascular disease. Effect of Tet2-deficient hematopoietic cells on the expression of pro-inflammatory cytokines and chemokines…, Figure 4. Tet2-Mediated Clonal Hematopoiesis Accelerates Heart Failure Through a Mechanism Involving the IL-1β/NLRP3 Inflammasome. The Journal of Heart and Lung Transplantation, https://doi.org/10.1016/j.healun.2021.01.656. 901-915, TET2 Driven Clonal Hematopoiesis Promotes Allograft Tolerance in a Mouse Heart Transplant Model, Impact of Clonal Hematopoiesis in Ischemic and Nonischemic Heart Failure, Mechanistic origins of diverse genome rearrangements in cancer, The effect of age on the acquisition and selection of cancer driver mutations in sun-exposed normal skin, Murine myeloproliferative disorder as a consequence of impaired collaboration between dendritic cells and CD4 T cells, Diminished Reactive Hematopoiesis and Cardiac Inflammation in a Mouse Model of Recurrent Myocardial Infarction. Clonal Hematopoiesis of Indeterminate Potential (CHIP) is associated with increased risk of atherosclerotic cardiovascular disease and preclinical work in mice has demonstrated that CHIP due to somatic mutations in the TET2 gene leads to accelerated atherosclerosis secondary to activation of the IL-1β signaling pathway. Circulation 138 … Front Mol Biosci. Copyright © 2021 Elsevier B.V. or its licensors or contributors. Somatic mutations preferentially accumulated in cutaneous squamous cell carcinoma cancer genes and clonally expanded with age, with distinct mutational processes underpinning different age groups. This somatic-mutation-driven clonal hematopoiesis has been associated with an increased incidence of cardiovascular disease and type 2 diabetes, but whether this epidemiological association reflects a direct, causal contribution of mutant hematopoietic and immune cells to age-related metabolic abnormalities remains unexplored. R01 HL131006/HL/NHLBI NIH HHS/United States, R01 HL132564/HL/NHLBI NIH HHS/United States, R01 HL138014/HL/NHLBI NIH HHS/United States, R01 HL126141/HL/NHLBI NIH HHS/United States, R01 HL141256/HL/NHLBI NIH HHS/United States. Nat Rev Cardiol. Clonal Hematopoiesis Wages War on the Myocardium. Gao R, Shi H, Chang S, Gao Y, Li X, Lv C, Yang H, Xiang H, Yang J, Xu L, Tang Y. Int Immunopharmacol. Background: To assess causality, we perturbed the function of Tet2, the second most commonly mutated gene linked to clonal hematopoiesis, in the hematopoietic cells of … This condition can arise from somatic mutations in preleukemic driver genes within hematopoietic stem/progenitor cells. The hematopoietic response to lipopolysaccharide was also mitigated after a previous MI. The accumulation of somatic mutations contributes to ageing and cancer. Caspase-1 Abrogates the Salutary Effects of Hypertrophic Preconditioning in Pressure Overload Hearts via IL-1β and IL-18. Clonal Hematopoiesis: A New Step Linking Inflammation to Heart Failure. In longitudinal analyses of 2 cohorts, clonal hematopoiesis was found to be associated with 3.7 and 4.5 years of accelerated age, and individuals with TET2-mediated clonal hematopoiesis displayed the greatest accelerations of epigenetic aging (6.1 and 6.4 years) compared with those individuals with no detectable clonal hematopoiesis. Dendritic cells (DCs) are a key cell type in the initiation of the adaptive immune response. Dr. Pascual-Figal explained that the specific study finding was that "clones with mutations in 2 genes frequently linked to clonal hematopoiesis, TET2 and DNMT3A, were associated with a … eCollection 2020 Feb. Dai F, Li X, Li X, Ding Z, Xu R, Yin P, Wang S, Ge J, Wu J, Zou Y. By continuing you agree to the use of cookies. Competitive bone marrow transplantation strategies with Tet2-deficient cells were used to mimic TET2 mutation-driven clonal hematopoiesis. This study investigated whether Tet2 mutations within hematopoietic cells can contribute to heart failure in 2 models of cardiac injury. 2021 Jan 15;8:623948. doi: 10.3389/fcell.2020.623948. 2020 Jun 23;11:1518. doi: 10.3389/fimmu.2020.01518. Among the regulators of DNA methylation, ten‐eleven translocation 2 (TET2) is one of the most frequently mutated genes in clonal hematopoiesis of indeterminate potential and in various hematological malignancies, underscoring a pivotal role for TET2 in blood homeostasis and hematopoietic transformation. Clonal mutations in TET2 (chromatin demethylase) have the strongest association with cardiovascular mortality and are prevalent in heart failure patients. The data presented herein raise the possibility … Experimental studies have convincingly demonstrated that mice lacking hematopoietic TET2 are characterized by augmented IL-1β and inflammasome activation driving atherosclerosis and cardiac dysfunction in murine models of heart failure. Our findings reveal that ageing is not only associated with an exponential increase in the number of somatic mutations accumulated in normal epidermis, but also with selection and expansion of cancer-associated mutations.