Lysine-specific demethylase 1 restricts hematopoietic progenitor proliferation and is essential for terminal differentiation
Standard
Lysine-specific demethylase 1 restricts hematopoietic progenitor proliferation and is essential for terminal differentiation. / Sprüssel, A; Schulte, J H; Weber, S; Necke, M; Händschke, K; Thor, T; Pajtler, K W; Schramm, A; König, K; Diehl, L; Mestdagh, P; Vandesompele, J; Speleman, F; Jastrow, H; Heukamp, L C; Schüle, R; Dührsen, U; Buettner, R; Eggert, A; Göthert, J R.
In: LEUKEMIA, Vol. 26, No. 9, 09.2012, p. 2039-51.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
Harvard
APA
Vancouver
Bibtex
}
RIS
TY - JOUR
T1 - Lysine-specific demethylase 1 restricts hematopoietic progenitor proliferation and is essential for terminal differentiation
AU - Sprüssel, A
AU - Schulte, J H
AU - Weber, S
AU - Necke, M
AU - Händschke, K
AU - Thor, T
AU - Pajtler, K W
AU - Schramm, A
AU - König, K
AU - Diehl, L
AU - Mestdagh, P
AU - Vandesompele, J
AU - Speleman, F
AU - Jastrow, H
AU - Heukamp, L C
AU - Schüle, R
AU - Dührsen, U
AU - Buettner, R
AU - Eggert, A
AU - Göthert, J R
PY - 2012/9
Y1 - 2012/9
N2 - Lysine (K)-specific demethylase 1A (LSD1/KDM1A) has been identified as a potential therapeutic target in solid cancers and more recently in acute myeloid leukemia. However, the potential side effects of a LSD1-inhibitory therapy remain elusive. Here, we show, with a newly established conditional in vivo knockdown model, that LSD1 represents a central regulator of hematopoietic stem and progenitor cells. LSD1 knockdown (LSD1-kd) expanded progenitor numbers by enhancing their proliferative behavior. LSD1-kd led to an extensive expansion of granulomonocytic, erythroid and megakaryocytic progenitors. In contrast, terminal granulopoiesis, erythropoiesis and platelet production were severely inhibited. The only exception was monopoiesis, which was promoted by LSD1 deficiency. Importantly, we showed that peripheral blood granulocytopenia, monocytosis, anemia and thrombocytopenia were reversible after LSD1-kd termination. Extramedullary splenic hematopoiesis contributed to the phenotypic reversion, and progenitor populations remained expanded. LSD1-kd was associated with the upregulation of key hematopoietic genes, including Gfi1b, Hoxa9 and Meis1, which are known regulators of the HSC/progenitor compartment. We also demonstrated that LSD1-kd abrogated Gfi1b-negative autoregulation by crossing LSD1-kd with Gfi1b:GFP mice. Taken together, our findings distinguish LSD1 as a critical regulator of hematopoiesis and point to severe, but reversible, side effects of a LSD1-targeted therapy.
AB - Lysine (K)-specific demethylase 1A (LSD1/KDM1A) has been identified as a potential therapeutic target in solid cancers and more recently in acute myeloid leukemia. However, the potential side effects of a LSD1-inhibitory therapy remain elusive. Here, we show, with a newly established conditional in vivo knockdown model, that LSD1 represents a central regulator of hematopoietic stem and progenitor cells. LSD1 knockdown (LSD1-kd) expanded progenitor numbers by enhancing their proliferative behavior. LSD1-kd led to an extensive expansion of granulomonocytic, erythroid and megakaryocytic progenitors. In contrast, terminal granulopoiesis, erythropoiesis and platelet production were severely inhibited. The only exception was monopoiesis, which was promoted by LSD1 deficiency. Importantly, we showed that peripheral blood granulocytopenia, monocytosis, anemia and thrombocytopenia were reversible after LSD1-kd termination. Extramedullary splenic hematopoiesis contributed to the phenotypic reversion, and progenitor populations remained expanded. LSD1-kd was associated with the upregulation of key hematopoietic genes, including Gfi1b, Hoxa9 and Meis1, which are known regulators of the HSC/progenitor compartment. We also demonstrated that LSD1-kd abrogated Gfi1b-negative autoregulation by crossing LSD1-kd with Gfi1b:GFP mice. Taken together, our findings distinguish LSD1 as a critical regulator of hematopoiesis and point to severe, but reversible, side effects of a LSD1-targeted therapy.
KW - Animals
KW - Blotting, Western
KW - Cell Differentiation
KW - Cell Proliferation
KW - Erythropoiesis
KW - Female
KW - Flow Cytometry
KW - Granulocytes
KW - Hematopoiesis
KW - Histone Demethylases
KW - Humans
KW - Integrases
KW - Male
KW - Megakaryocytes
KW - Mice
KW - Mice, Transgenic
KW - Oxidoreductases, N-Demethylating
KW - Proto-Oncogene Proteins
KW - Repressor Proteins
KW - Stem Cells
U2 - 10.1038/leu.2012.157
DO - 10.1038/leu.2012.157
M3 - SCORING: Journal article
C2 - 22699452
VL - 26
SP - 2039
EP - 2051
JO - LEUKEMIA
JF - LEUKEMIA
SN - 0887-6924
IS - 9
ER -