Asxl1 deletion disrupts MYC and RNA polymerase II function in granulocyte progenitors

被引：3

作者：

Braun, Theodore P. ^{[1
,2
]}

Estabrook, Joseph ^{[3
]}

Schonrock, Zachary ^{[1
]}

Curtiss, Brittany M. ^{[1
]}

Darmusey, Lucie ^{[1
]}

Macaraeg, Jommel ^{[1
]}

Enright, Trevor ^{[3
]}

Coblentz, Cody ^{[1
]}

Callahan, Rowan ^{[1
]}

Yashar, William ^{[1
]}

Taherinasab, Akram ^{[1
]}

Mohammed, Hisham ^{[3
]}

Coleman, Daniel J. ^{[1
]}

Druker, Brian J. ^{[1
,2
]}

Demir, Emek ^{[1
,3
]}

Lusardi, Theresa A. ^{[3
]}

Maxson, Julia E. ^{[1
]}

机构：

[1] Oregon Hlth & Sci Univ, Knight Canc Inst, Portland, OR 97239 USA

[2] Oregon Hlth & Sci Univ, Div Hematol & Med Oncol, Portland, OR 97239 USA

[3] Oregon Hlth & Sci Univ, Canc Early Detect Adv Res Ctr, Portland, OR 97239 USA

来源：

LEUKEMIA | 2023年 / 37卷 / 02期

关键词：

CLONAL HEMATOPOIESIS; MYELOID-LEUKEMIA; WEB SERVER; ASXL1; MUTATIONS; GENE; TRANSFORMATION; ACTIVATION; POLYCOMB; DYNAMICS;

D O I：

10.1038/s41375-022-01792-x

中图分类号：

R73 [肿瘤学];

学科分类号：

100214 ;

摘要：

Mutations in the gene Additional Sex-Combs Like 1 (ASXL1) are recurrent in myeloid malignancies as well as the pre-malignant condition clonal hematopoiesis, where they are universally associated with poor prognosis. However, the role of ASXL1 in myeloid lineage maturation is incompletely described. To define the role of ASXL1 in myelopoiesis, we employed single cell RNA sequencing and a murine model of hematopoietic-specific Asxl1 deletion. In granulocyte progenitors, Asxl1 deletion leads to hyperactivation of MYC and a quantitative decrease in neutrophil production. This loss of granulocyte production was not accompanied by significant changes in the landscape of covalent histone modifications. However, Asxl1 deletion results in a decrease in RNAPII promoter-proximal pausing in granulocyte progenitors, indicative of a global increase in productive transcription. These results suggest that ASXL1 inhibits productive transcription in granulocyte progenitors, identifying a new role for this epigenetic regulator in myeloid development.

引用

页码：478 / 487

页数：10

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