Abstract
G-CSF specifically stimulates the proliferation and differentiation of cells that are committed to the neutrophil-granulocyte lineage. Although Stat3 was thought to be essential for the transduction of G-CSF-induced cell proliferation and differentiation signals, mice deficient for Stat3 in hematopoietic cells show neutrocytosis and infiltration of cells into the digestive tract. The number of progenitor cells in the neutrophil lineage is not changed, and G-CSF-induced proliferation of progenitor cells and prolonged neutrophil survival were observed in Stat3-deficient mice. In hematopoietic cells from Stat3-deficient mice, trace levels of SOCS3, a negative regulator of granulopoiesis, were observed, and SOCS3 expression was not induced by G-CSF stimulation. Stat3-null bone marrow cells displayed a significant activation of extracellular regulated kinase 1 (ERK1)/ERK2 under basal conditions, and the activation of ERK was enhanced and sustained by G-CSF stimulation. Furthermore, the augmented proliferation of Stat3-deficient bone marrow cells in response to G-CSF was dramatically decreased by addition of a MEK1 inhibitor. These results indicate that Stat3 functions as a negative regulator of G-CSF signaling by inducing SOCS3 expression and that ERK activation is the major factor responsible for inducing the proliferation of hematopoietic cells in response to G-CSF.
| Original language | English |
|---|---|
| Pages (from-to) | 252-263 |
| Number of pages | 12 |
| Journal | STEM CELLS |
| Volume | 23 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Feb 1 2005 |
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All Science Journal Classification (ASJC) codes
- Molecular Medicine
- Developmental Biology
- Cell Biology
Cite this
Roles of Stat3 and ERK in G-CSF signaling. / Kamezaki, Kenjiro; Shimoda, Kazuya; Numata, Akihiko; Haro, Takashi; Kakumitsu, Haruko; Yoshie, Masumi; Yamamoto, Masahiro; Takeda, Kiyoshi; Matsuda, Tadashi; Akira, Shizuo; Ogawa, Katsuhiro; Harada, Mine.
In: STEM CELLS, Vol. 23, No. 2, 01.02.2005, p. 252-263.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Roles of Stat3 and ERK in G-CSF signaling
AU - Kamezaki, Kenjiro
AU - Shimoda, Kazuya
AU - Numata, Akihiko
AU - Haro, Takashi
AU - Kakumitsu, Haruko
AU - Yoshie, Masumi
AU - Yamamoto, Masahiro
AU - Takeda, Kiyoshi
AU - Matsuda, Tadashi
AU - Akira, Shizuo
AU - Ogawa, Katsuhiro
AU - Harada, Mine
PY - 2005/2/1
Y1 - 2005/2/1
N2 - G-CSF specifically stimulates the proliferation and differentiation of cells that are committed to the neutrophil-granulocyte lineage. Although Stat3 was thought to be essential for the transduction of G-CSF-induced cell proliferation and differentiation signals, mice deficient for Stat3 in hematopoietic cells show neutrocytosis and infiltration of cells into the digestive tract. The number of progenitor cells in the neutrophil lineage is not changed, and G-CSF-induced proliferation of progenitor cells and prolonged neutrophil survival were observed in Stat3-deficient mice. In hematopoietic cells from Stat3-deficient mice, trace levels of SOCS3, a negative regulator of granulopoiesis, were observed, and SOCS3 expression was not induced by G-CSF stimulation. Stat3-null bone marrow cells displayed a significant activation of extracellular regulated kinase 1 (ERK1)/ERK2 under basal conditions, and the activation of ERK was enhanced and sustained by G-CSF stimulation. Furthermore, the augmented proliferation of Stat3-deficient bone marrow cells in response to G-CSF was dramatically decreased by addition of a MEK1 inhibitor. These results indicate that Stat3 functions as a negative regulator of G-CSF signaling by inducing SOCS3 expression and that ERK activation is the major factor responsible for inducing the proliferation of hematopoietic cells in response to G-CSF.
AB - G-CSF specifically stimulates the proliferation and differentiation of cells that are committed to the neutrophil-granulocyte lineage. Although Stat3 was thought to be essential for the transduction of G-CSF-induced cell proliferation and differentiation signals, mice deficient for Stat3 in hematopoietic cells show neutrocytosis and infiltration of cells into the digestive tract. The number of progenitor cells in the neutrophil lineage is not changed, and G-CSF-induced proliferation of progenitor cells and prolonged neutrophil survival were observed in Stat3-deficient mice. In hematopoietic cells from Stat3-deficient mice, trace levels of SOCS3, a negative regulator of granulopoiesis, were observed, and SOCS3 expression was not induced by G-CSF stimulation. Stat3-null bone marrow cells displayed a significant activation of extracellular regulated kinase 1 (ERK1)/ERK2 under basal conditions, and the activation of ERK was enhanced and sustained by G-CSF stimulation. Furthermore, the augmented proliferation of Stat3-deficient bone marrow cells in response to G-CSF was dramatically decreased by addition of a MEK1 inhibitor. These results indicate that Stat3 functions as a negative regulator of G-CSF signaling by inducing SOCS3 expression and that ERK activation is the major factor responsible for inducing the proliferation of hematopoietic cells in response to G-CSF.
UR - http://www.scopus.com/inward/record.url?scp=13744263866&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=13744263866&partnerID=8YFLogxK
U2 - 10.1634/stemcells.2004-0173a
DO - 10.1634/stemcells.2004-0173a
M3 - Article
C2 - 15671148
AN - SCOPUS:13744263866
VL - 23
SP - 252
EP - 263
JO - Stem Cells
JF - Stem Cells
SN - 1066-5099
IS - 2
ER -