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Freddy Radtke

Cette personne a quitté l’EPFL

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Publications associées (113)

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Tcf1 is essential for initiation of oncogenic Notch1-driven chromatin topology in T-ALL

Christelle Dubey, Freddy Radtke, Ute Koch, Nadine Fournier, Mateusz Waldemar Antoszewski, Marianne Nkosi, Tara Kimberly Sugrue

NOTCH1 is a well-established lineage specifier for T cells and among the most frequently mutated genes throughout all subclasses of T cell acute lymphoblastic leukemia (T-ALL). How oncogenic NOTCH1 signaling launches a leukemia-prone chromatin landscape du ...

AMER SOC HEMATOLOGY2022

Very High Throughput Electrical Cell Lysis and Extraction of Intracellular Compounds Using 3D Carbon Electrodes in Lab-on-a-Chip Devices

Rodrigo Martinez Duarte, Philippe Renaud, Freddy Radtke, Rajwinder Lehal

Here we present an electrical lysis throughput of 600 microliters per minute at high cell density (108 yeast cells per ml) with 90% efficiency, thus improving the current common throughput of one microliter per minute. We also demonstrate the extraction of ...

2012

A leukemia-protective germline variant mediates chromatin module formation via transcription factor nucleation

Freddy Radtke, Bart Deplancke, Ute Koch, Vincent Roland Julien Gardeux, Riccardo Dainese, Daniel Alpern, Jörn Pezoldt, Julie Marie Russeil, Maria Litovchenko, Gerard Llimos Aubach, Judith Franziska Kribelbauer

Non-coding variants coordinate transcription factor (TF) binding and chromatin mark enrichment changes over regions spanning >100 kb. These molecularly coordinated regions are named "variable chromatin modules" (VCMs), providing a conceptual framework of h ...

Nature Portfolio2022

Jagged1 signals in the postnatal subventricular zone are required for neural stem cell self-renewal

Freddy Radtke

Neural stem cells (NSCs) in the postnatal mammalian brain self-renew and are a source of neurons and glia. To date, little is known about the molecular and cellular mechanisms regulating the maintenance and differentiation of these multipotent progenitors. ...

2005

Jagged1 in the portal vein mesenchyme regulates intrahepatic bile duct development: insights into Alagille syndrome

Freddy Radtke

Mutations in the human Notch ligand jagged 1 (JAG1) result in a multi-system disorder called Alagille syndrome (AGS). AGS is chiefly characterized by a paucity of intrahepatic bile ducts (IHBD), but also includes cardiac, ocular, skeletal, craniofacial and ...

2010

Hes1 Is a Critical but Context-Dependent Mediator of Canonical Notch Signaling in Lymphocyte Development and Transformation

Freddy Radtke, Ute Koch, Christelle Dubey, Silvia Wirth

Although canonical Notch signaling regulates multiple hematopoietic lineage decisions including T cell and marginal zone B cell fate specification, the downstream molecular mediators of Notch function are largely unknown. We showed here that conditional in ...

Elsevier2010

Notch signaling promotes disease initiation and progression in murine chronic lymphocytic leukemia

Freddy Radtke, Ute Koch, Nadine Fournier, Jessica Sordet, Mateusz Waldemar Antoszewski, Marianne Nkosi, Delphine Maude Tardivon

NOTCH1 gain-of-function mutations are recurrent in B-cell chronic lymphocytic leukemia (B-CLL), where they are associated with accelerated disease progression and refractoriness to chemotherapy. The specific role of NOTCH1 in the development and progressio ...

AMER SOC HEMATOLOGY2021

Self-renewal and cancer of the gut: two sides of a coin

Freddy Radtke

The intestinal epithelium follows the paradigms of stem cell biology established for other self-renewing tissues. With a unique topology, it constitutes a two-dimensional structure folded into valleys and hills: the proliferative crypts and the differentia ...

American Association for the Advancement of Science2005

Hedgehog signaling is dispensable for adult hematopoietic stem cell function

Freddy Radtke, Ute Koch

The Hedgehog (Hh) signaling pathway is a developmentally conserved regulator of stem cell function. Several reports suggested that Hh signaling is an important regulator of hematopoietic stem cell (HSC) maintenance and differentiation. Here we test this hy ...

2009

Notch controls embryonic Schwann cell differentiation, postnatal myelination and adult plasticity

Freddy Radtke

Notch signaling is central to vertebrate development, and analysis of Notch has provided important insights into pathogenetic mechanisms in the CNS and many other tissues. However, surprisingly little is known about the role of Notch in the development and ...

2009

Identification of epidermal pdx1 expression discloses different roles of notch1 and notch2 in murine kras-induced skin carcinogenesis in vivo

Freddy Radtke

BACKGROUND: The Ras and Notch signaling pathways are frequently activated during development to control many diverse cellular processes and are often dysregulated during tumorigenesis. To study the role of Notch and oncogenic Kras signaling in a progenitor ...

Public Library of Science2010

Notch Signaling In Solid Tumors

Freddy Radtke, Ute Koch

In recent years a substantial body of evidence derived from not only preclinical but also clinical studies has accumulated in support of Notch signaling playing important oncogenic roles in several types of cancer. The finding that activating Notch mutatio ...

2010

Dicer1 imparts essential survival cues in Notch-driven T-ALL via miR-21-mediated tumor suppressor Pdcd4 repression

Freddy Radtke, Ute Koch, Fabian Junker

The modulatory function of individual microRNAs (miRNAs) in Notch-driven T-cell acute lymphoblastic leukemias (T-ALLs) has recently been established. Although protumorigenic and tumor-suppressive miRNAs are implicated in disease onset in murine models of N ...

American Society of Hematology2015

Specific fibroblastic niches in secondary lymphoid organs orchestrate distinct Notch-regulated immune responses

Freddy Radtke, Ute Koch, Nicolas Fasnacht

Fibroblast-like cells of secondary lymphoid organs (SLO) are important for tissue architecture. In addition, they regulate lymphocyte compartmentalization through the secretion of chemokines, and participate in the orchestration of appropriate cell-cell in ...

Rockefeller University Press2014

Haematopoietic stem cell niche in Drosophila

Freddy Radtke, Ute Koch

Development and homeostasis of the haematopoietic system is dependent upon stem cells that have the unique ability to both self-renew and to differentiate in all cell lineages of the blood. The crucial decision between haematopoietic stem cell (HSC) self-r ...

2007

Smooth muscle Notch1 mediates neointimal formation after vascular injury

Yiming Li, Freddy Radtke

Notch1 regulates binary cell fate determination and is critical for angiogenesis and cardiovascular development. However, the pathophysiological role of Notch1 in the postnatal period is not known. We hypothesize that Notch1 signaling in vascular smooth mu ...

2009

Deletion of Notch1 converts pro-T cells to dendritic cells and promotes thymic B cells by cell-extrinsic and cell-intrinsic mechanisms

Freddy Radtke

Notch1 signaling is required for T cell development and has been implicated in fate decisions in the thymus. We showed that Notch1 deletion in progenitor T cells (pro-T cells) revealed their latent developmental potential toward becoming conventional and p ...

2009

Reciprocal inhibition of NOTCH and SOX2 shapes tumor cell plasticity and therapeutic escape in triple-negative breast cancer

Joaquim Roland Guy Bernard Javary, Freddy Radtke, Nadine Fournier, Morgane Fournier

Cancer cell plasticity contributes significantly to the failure of chemo- and targeted therapies in triple-negative breast cancer (TNBC). Molecular mechanisms of therapy-induced tumor cell plasticity and associated resistance are largely unknown. Using a g ...

2024

The stream of precursors that colonizes the thymus proceeds selectively through the early T lineage precursor stage of T cell development

Freddy Radtke

T cell development in the thymus depends on continuous colonization by hematopoietic precursors. Several distinct T cell precursors have been identified, but whether one or several independent precursor cell types maintain thymopoiesis is unclear. We have ...

2008

Delta-like 4 is the essential, nonredundant ligand for Notch1 during thymic T cell lineage commitment

Freddy Radtke, Ute Koch

Thymic T cell lineage commitment is dependent on Notch1 (N1) receptor-mediated signaling. Although the physiological ligands that interact with N1 expressed on thymic precursors are currently unknown, in vitro culture systems point to Delta-like 1 (DL1) an ...

2008