Loading…
Overlapping functions of Hdac1 and Hdac2 in cell cycle regulation and haematopoiesis
Histone deacetylases (HDACs) counterbalance acetylation of lysine residues, a protein modification involved in numerous biological processes. Here, Hdac1 and Hdac2 conditional knock‐out alleles were used to study the function of class I Hdac1 and Hdac2 in cell cycle progression and haematopoietic di...
Saved in:
Published in: | The EMBO journal 2010-08, Vol.29 (15), p.2586-2597 |
---|---|
Main Authors: | , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | Histone deacetylases (HDACs) counterbalance acetylation of lysine residues, a protein modification involved in numerous biological processes. Here,
Hdac1
and
Hdac2
conditional knock‐out alleles were used to study the function of class I Hdac1 and Hdac2 in cell cycle progression and haematopoietic differentiation. Combined deletion of Hdac1 and Hdac2, or inactivation of their deacetylase activity in primary or oncogenic‐transformed fibroblasts, results in a senescence‐like G
1
cell cycle arrest, accompanied by up‐regulation of the cyclin‐dependent kinase inhibitor p21
Cip
. Notably, concomitant genetic inactivation of p53 or p21
Cip
indicates that Hdac1 and Hdac2 regulate p53–p21
Cip
‐independent pathways critical for maintaining cell cycle progression.
In vivo
, we show that Hdac1 and Hdac2 are not essential for liver homeostasis. In contrast, total levels of Hdac1 and Hdac2 in the haematopoietic system are critical for erythrocyte‐megakaryocyte differentiation. Dual inactivation of Hdac1 and Hdac2 results in apoptosis of megakaryocytes and thrombocytopenia. Together, these data indicate that Hdac1 and Hdac2 have overlapping functions in cell cycle regulation and haematopoiesis. In addition, this work provides insights into mechanism‐based toxicities observed in patients treated with HDAC inhibitors. |
---|---|
ISSN: | 0261-4189 1460-2075 |
DOI: | 10.1038/emboj.2010.136 |