Concept

Extramedullary hematopoiesis

Publications associées (25)

Characterization of the gut-bone marrow axis through bile acid signaling

Communication between the intestine and other organs such as the lungs, brain or bones is mediated by several metabolites, like short-chain fatty acids or bile acids, that relay information about nutritional and microbiota status. Bile acids are endogenous ...

EPFL2024

New approaches to uncover the minimally functional hematopoietic niche using the adipocytic differentiation axis: pharmacological modulation and adrenal niche induction

Frédérica Schyrr

Hematopoietic Stem and Progenitor Cells (HSPCs) reside in their niche, a structure that regulates the balance of cellular quiescence, self-renewal and commitment towards differentiated cells. This highly plastic niche is formed by several cellular players, ...

EPFL2022

Inhibition of SRC-mediated integrin signaling in bone marrow niche enhances hematopoietic stem cell function

Jörg Hülsken

Interaction with microenvironmental factors is crucial for the regulation of hematopoietic stem cell (HSC) function. Stroma derived factor (SDF)-1 alpha supports HSCs in the quiescent state and is central to the homing of transplanted HSCs. Here, we show t ...

CELL PRESS2022

Niche-Mediated Integrin Signaling Supports Steady-State Hematopoiesis in the Spleen

Jörg Hülsken

Outside-in integrin signaling regulates cell fate decisions in a variety of cell types, including hematopoietic stem cells (HSCs). Our earlier published studies showed that interruption of periostin (POSTN) and integrin-av (ITGAV) interaction induces faste ...

American Association of Immunologists ; Oxford University Press2021

Quantitative approaches to unravel bone marrow adipocyte site-specificity and its implication in hematopoiesis

Josefine Catharina Pedersen Tratwal

Over the last decade, bone marrow (BM) adipose tissue (BMAT) has emerged as a distinct adipose depot with unique metabolic properties and effects both in homeostasis and in the progression of disease. We provide a first comprehensive review of existing an ...

EPFL2020

Characterization of myelodysplastic syndromes progressing to acute lymphoblastic leukemia

Filipe Amândio Brandão Sanches Vong Martins

Myelodysplastic syndromes (MDS) are a heterogeneous group of diseases, with a variable probability of transformation into acute leukemia, which is, in the vast majority of cases, of myeloid lineage. Nevertheless, rare cases of acute lymphoblastic leukemia ...

SPRINGER2021

MarrowQuantAcross Aging and Aplasia: A Digital Pathology Workflow for Quantification of Bone Marrow Compartments in Histological Sections

Nicolas Kunz, Olaia Maria Naveiras Torres-Quiroga, Olivier Burri, Josefine Catharina Pedersen Tratwal, Vasco Ledebur de Antas de Campos, Rita Sarkis, Frédérica Schyrr, Shanti Rojas-Sutterlin, Daniel Naveed Tavakol

The bone marrow (BM) exists heterogeneously as hematopoietic/red or adipocytic/yellow marrow depending on skeletal location, age, and physiological condition. Mouse models and patients undergoing radio/chemotherapy or suffering acute BM failure endure rapi ...

2020

Blood Flow to the Spleen is Altered in a Mouse Model of Spinal Muscular Atrophy

Bernard Schneider

Spinal muscular atrophy (SMA) is a neuromuscular disorder affecting young children. While pre-clinical models of SMA show small spleens, the same is not true in humans. Here, we show by doppler ultrasonography decreased splenic blood flow in Smn(2B/-) mice ...

2020

γ-Catenin-Dependent Signals Maintain BCR-ABL1+ B Cell Acute Lymphoblastic Leukemia

Oliver Hantschel, Jörg Hülsken, Anja Irmisch

The BCR-ABL1 fusion protein is the cause of chronic myeloid leukemia (CML) and of a significant fraction of adult-onset B cell acute lymphoblastic leukemia (B-ALL) cases. Using mouse models and patient-derived samples, we identified an essential role for γ ...

2019

The nuclear receptor corepressor NCoR1 regulates hematopoiesis and leukemogenesis in vivo

Johan Auwerx, Lulu Liu, Wei Zhang

Enhanced understanding of normal and malignant hematopoiesis pathways should facilitate the development of effective clinical treatment strategies for hematopoietic malignancies. Nuclear receptor corepressor 1 (NCoR1) has been implicated in transcriptional ...

AMER SOC HEMATOLOGY2019

Modeling hematopoietic stem cell dynamics in bioengineered niches

Sonja Giger

Bone marrow transplantation is a well-established medical procedure for the treatment of various hematologic diseases. However, the relatively low number of hematopoietic stem cells (HSCs) that can be harvested, especially from umbilical cord blood, limits ...

EPFL2019

Metabolic and microenvironmental strategies to accelerate hematopoietic recovery post-aplasia

Vasco Ledebur de Antas de Campos

The procedure-associated mortality rate of bone marrow transplantations (BMT) remains close to 25%. The BMT is therefore only indicated for life-threatening diseases, with no replacement of this technology to be expected in the foreseeable future. Modest i ...

EPFL2019

Outside-in integrin signalling regulates haematopoietic stem cell function via Periostin-Itgav axis

Jörg Hülsken, Albert Santamaria Martinez

Integrins play an important role in haematopoietic stem cell (HSC) maintenance in the bone marrow niche. Here, we demonstrate that Periostin (Postn) via interaction with Integrin-alpha v (Itgav) regulates HSC proliferation. Systemic deletion of Postn resul ...

Nature Publishing Group2016

Biomechanical forces promote blood development through prostaglandin E2 and the cAMP-PKA signaling axis

Olaia Maria Naveiras Torres-Quiroga, Nan Li

Blood flow promotes emergence of definitive hematopoietic stem cells (HSCs) in the developing embryo, yet the signals generated by hemodynamic forces that influence hematopoietic potential remain poorly defined. Here we show that fluid shear stress endows ...

2015

From Embryo to Adult: Hematopoiesis along the Drosophila Life Cycle

Bruno Lemaitre, Elodie Julie Virginie Ramond

Studies on Drosophila hematopoiesis have thus far focused on the embryonic and larval origin of hemocytes, the fly blood cells. In this issue of Developmental Cell, Ghosh et al. (2015) identify adult hematopoietic hubs containing progenitors that can diffe ...

Cell Press - Elsevier2015

Waddlia chondrophila induces systemic infection, organ pathology, and elicits Th1-associated humoral immunity in a murine model of genital infection

Alessandra Piersigilli

Waddlia chondrophila is a known bovine abortigenic Ch/amydia-related bacterium that has been associated with adverse pregnancy outcomes in human. However, there is a lack of knowledge regarding how W chondrophila infection spreads, its ability to elicit an ...

Frontiers Media Sa2015

Gut microbiota metabolism of dietary fiber influences allergic airway disease and hematopoiesis

Nicola Harris

Metabolites from intestinal microbiota are key determinants of host-microbe mutualism and, consequently, the health or disease of the intestinal tract. However, whether such host-microbe crosstalk influences inflammation in peripheral tissues, such as the ...

Nature Publishing Group2014

The transcriptional landscape of hematopoietic stem cell ontogeny

Olaia Maria Naveiras Torres-Quiroga

Transcriptome analysis of adult hematopoietic stem cells (HSCs) and their progeny has revealed mechanisms of blood differentiation and leukemogenesis, but a similar analysis of HSC development is lacking. Here, we acquired the transcriptomes of developing ...

2012

The role of MYC in bone and in the hematopoietic stem cell niche

The nuclear protein c-Myc is one of the most potent proto-oncogenes described. Its expression is found to be deregulated in more than 50 percent of human cancers, where it has been shown to control a number of biological processes including driving prolife ...

EPFL2009

The role of TIF1 gamma during adult murine hematopoiesis

Transforming Growth Factor beta (TGFβ) signaling plays an important role in a variety of cellular processes during embryonic development, adult tissue homeostasis and cancer. TGFβI ligand is a potent inhibitor of early hematopoietic progenitor [1] cells in ...

EPFL2009