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PU.1 Expression Defines Distinct Functional Activities in the Phenotypic HSC Compartment of a Murine Inflammatory Stress Model
by
Rabe, Jennifer L.
, Davizon-Castillo, Pavel
, Pietras, Eric M.
, Mills, Taylor S.
, Hernandez, Giovanny
, Chavez, James S.
, Niño, Katia E.
in
Animals
/ Antibiotics
/ Antibodies
/ CD150 antigen
/ Cell cycle
/ Cytokines
/ Flow cytometry
/ hematopoiesis
/ hematopoietic stem cell
/ Hematopoietic stem cells
/ Hematopoietic Stem Cells - metabolism
/ IL-1β
/ Inflammation
/ megakaryocyte
/ Mice
/ myeloid
/ Physiology
/ Progenitor cells
/ PU.1
/ PU.1 protein
/ Stem cell transplantation
/ Stem cells
/ Surface markers
/ Transcription factors
/ Transplants & implants
2022
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PU.1 Expression Defines Distinct Functional Activities in the Phenotypic HSC Compartment of a Murine Inflammatory Stress Model
by
Rabe, Jennifer L.
, Davizon-Castillo, Pavel
, Pietras, Eric M.
, Mills, Taylor S.
, Hernandez, Giovanny
, Chavez, James S.
, Niño, Katia E.
in
Animals
/ Antibiotics
/ Antibodies
/ CD150 antigen
/ Cell cycle
/ Cytokines
/ Flow cytometry
/ hematopoiesis
/ hematopoietic stem cell
/ Hematopoietic stem cells
/ Hematopoietic Stem Cells - metabolism
/ IL-1β
/ Inflammation
/ megakaryocyte
/ Mice
/ myeloid
/ Physiology
/ Progenitor cells
/ PU.1
/ PU.1 protein
/ Stem cell transplantation
/ Stem cells
/ Surface markers
/ Transcription factors
/ Transplants & implants
2022
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PU.1 Expression Defines Distinct Functional Activities in the Phenotypic HSC Compartment of a Murine Inflammatory Stress Model
by
Rabe, Jennifer L.
, Davizon-Castillo, Pavel
, Pietras, Eric M.
, Mills, Taylor S.
, Hernandez, Giovanny
, Chavez, James S.
, Niño, Katia E.
in
Animals
/ Antibiotics
/ Antibodies
/ CD150 antigen
/ Cell cycle
/ Cytokines
/ Flow cytometry
/ hematopoiesis
/ hematopoietic stem cell
/ Hematopoietic stem cells
/ Hematopoietic Stem Cells - metabolism
/ IL-1β
/ Inflammation
/ megakaryocyte
/ Mice
/ myeloid
/ Physiology
/ Progenitor cells
/ PU.1
/ PU.1 protein
/ Stem cell transplantation
/ Stem cells
/ Surface markers
/ Transcription factors
/ Transplants & implants
2022
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PU.1 Expression Defines Distinct Functional Activities in the Phenotypic HSC Compartment of a Murine Inflammatory Stress Model
Journal Article
PU.1 Expression Defines Distinct Functional Activities in the Phenotypic HSC Compartment of a Murine Inflammatory Stress Model
2022
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Overview
The transcription factor PU.1 is a critical regulator of lineage fate in blood-forming hematopoietic stem cells (HSC). In response to pro-inflammatory signals, such as the cytokine IL-1β, PU.1 expression is increased in HSC and is associated with myeloid lineage expansion. To address potential functional heterogeneities arising in the phenotypic HSC compartment due to changes in PU.1 expression, here, we fractionated phenotypic HSC in mice using the SLAM surface marker code in conjunction with PU.1 expression levels, using the PU.1-EYFP reporter mouse strain. While PU.1lo SLAM cells contain extensive long-term repopulating activity and a molecular signature corresponding to HSC activity at steady state, following IL-1β treatment, HSCLT induce PU.1 expression and are replaced in the PU.1lo SLAM fraction by CD41+ HSC-like megakaryocytic progenitors (SL-MkP) with limited long-term engraftment capacity. On the other hand, the PU.1hi SLAM fraction exhibits extensive myeloid lineage priming and clonogenic activity and expands rapidly in response to IL-1β. Furthermore, we show that EPCR expression, but not CD150 expression, can distinguish HSCLT and SL-MkP under inflammatory conditions. Altogether, our data provide insights into the dynamic regulation of PU.1 and identify how PU.1 levels are linked to HSC fate in steady state and inflammatory stress conditions.
Publisher
MDPI AG,MDPI
Subject
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