Gene dosage effect of CUX1 in a murine model disrupts HSC homeostasis and controls the severity and mortality of MDS
An, N., Khan, S., Imgruet, M. K., Gurbuxani, S. K., Konecki, S. N., Burgess, M. R., McNerney, M. E.
American Society of Hematology (ASH)
Published 2018
American Society of Hematology (ASH)
Published 2018
| Publication Date: |
2018-06-15
|
|---|---|
| Publisher: |
American Society of Hematology (ASH)
|
| Print ISSN: |
0006-4971
|
| Electronic ISSN: |
1528-0020
|
| Topics: |
Biology
Medicine
|
| Keywords: |
Hematopoiesis and Stem Cells, Myeloid Neoplasia
|
| Published by: |
| _version_ | 1839208091593211905 |
|---|---|
| autor | An, N., Khan, S., Imgruet, M. K., Gurbuxani, S. K., Konecki, S. N., Burgess, M. R., McNerney, M. E. |
| beschreibung | Monosomy 7 (–7) and del(7q) are high-risk cytogenetic abnormalities common in myeloid malignancies. We previously reported that CUX1 , a homeodomain-containing transcription factor encoded on 7q22, is frequently inactivated in myeloid neoplasms, and CUX1 myeloid tumor suppressor activity is conserved from humans to Drosophila. CUX1 -inactivating mutations are recurrent in clonal hematopoiesis of indeterminate potential as well as myeloid malignancies, in which they independently carry a poor prognosis. To determine the role for CUX1 in hematopoiesis, we generated 2 short hairpin RNA-based mouse models with ~54% (Cux1 mid ) or ~12% (Cux1 low ) residual CUX1 protein. Cux1 mid mice develop myelodysplastic syndrome (MDS) with anemia and trilineage dysplasia, whereas CUX1 low mice developed MDS/myeloproliferative neoplasms and anemia. In diseased mice, restoration of CUX1 expression was sufficient to reverse the disease. CUX1 knockdown bone marrow transplant recipients exhibited a transient hematopoietic expansion, followed by a reduction of hematopoietic stem cells (HSCs), and fatal bone marrow failure, in a dose-dependent manner. RNA-sequencing after CUX1 knockdown in human CD34 + cells identified a –7/del(7q) MDS gene signature and altered differentiation, proliferative, and phosphatidylinositol 3-kinase (PI3K) signaling pathways. In functional assays, CUX1 maintained HSC quiescence and repressed proliferation. These homeostatic changes occurred in parallel with decreased expression of the PI3K inhibitor, Pik3ip1 , and elevated PI3K/AKT signaling upon CUX1 knockdown. Our data support a model wherein CUX1 knockdown promotes PI3K signaling, drives HSC exit from quiescence and proliferation, and results in HSC exhaustion. Our results also demonstrate that reduction of a single 7q gene, Cux1 , is sufficient to cause MDS in mice. |
| citation_standardnr | 6283210 |
| datenlieferant | ipn_articles |
| feed_id | 310 |
| feed_publisher | American Society of Hematology (ASH) |
| feed_publisher_url | http://www.hematology.org/ |
| insertion_date | 2018-06-15 |
| journaleissn | 1528-0020 |
| journalissn | 0006-4971 |
| publikationsjahr_anzeige | 2018 |
| publikationsjahr_facette | 2018 |
| publikationsjahr_intervall | 7984:2015-2019 |
| publikationsjahr_sort | 2018 |
| publisher | American Society of Hematology (ASH) |
| quelle | Blood |
| relation | http://www.bloodjournal.org/cgi/content/short/131/24/2682?rss=1 |
| schlagwort | Hematopoiesis and Stem Cells, Myeloid Neoplasia |
| search_space | articles |
| shingle_author_1 | An, N., Khan, S., Imgruet, M. K., Gurbuxani, S. K., Konecki, S. N., Burgess, M. R., McNerney, M. E. |
| shingle_author_2 | An, N., Khan, S., Imgruet, M. K., Gurbuxani, S. K., Konecki, S. N., Burgess, M. R., McNerney, M. E. |
| shingle_author_3 | An, N., Khan, S., Imgruet, M. K., Gurbuxani, S. K., Konecki, S. N., Burgess, M. R., McNerney, M. E. |
| shingle_author_4 | An, N., Khan, S., Imgruet, M. K., Gurbuxani, S. K., Konecki, S. N., Burgess, M. R., McNerney, M. E. |
| shingle_catch_all_1 | Gene dosage effect of CUX1 in a murine model disrupts HSC homeostasis and controls the severity and mortality of MDS Hematopoiesis and Stem Cells, Myeloid Neoplasia Monosomy 7 (–7) and del(7q) are high-risk cytogenetic abnormalities common in myeloid malignancies. We previously reported that CUX1 , a homeodomain-containing transcription factor encoded on 7q22, is frequently inactivated in myeloid neoplasms, and CUX1 myeloid tumor suppressor activity is conserved from humans to Drosophila. CUX1 -inactivating mutations are recurrent in clonal hematopoiesis of indeterminate potential as well as myeloid malignancies, in which they independently carry a poor prognosis. To determine the role for CUX1 in hematopoiesis, we generated 2 short hairpin RNA-based mouse models with ~54% (Cux1 mid ) or ~12% (Cux1 low ) residual CUX1 protein. Cux1 mid mice develop myelodysplastic syndrome (MDS) with anemia and trilineage dysplasia, whereas CUX1 low mice developed MDS/myeloproliferative neoplasms and anemia. In diseased mice, restoration of CUX1 expression was sufficient to reverse the disease. CUX1 knockdown bone marrow transplant recipients exhibited a transient hematopoietic expansion, followed by a reduction of hematopoietic stem cells (HSCs), and fatal bone marrow failure, in a dose-dependent manner. RNA-sequencing after CUX1 knockdown in human CD34 + cells identified a –7/del(7q) MDS gene signature and altered differentiation, proliferative, and phosphatidylinositol 3-kinase (PI3K) signaling pathways. In functional assays, CUX1 maintained HSC quiescence and repressed proliferation. These homeostatic changes occurred in parallel with decreased expression of the PI3K inhibitor, Pik3ip1 , and elevated PI3K/AKT signaling upon CUX1 knockdown. Our data support a model wherein CUX1 knockdown promotes PI3K signaling, drives HSC exit from quiescence and proliferation, and results in HSC exhaustion. Our results also demonstrate that reduction of a single 7q gene, Cux1 , is sufficient to cause MDS in mice. An, N., Khan, S., Imgruet, M. K., Gurbuxani, S. K., Konecki, S. N., Burgess, M. R., McNerney, M. E. American Society of Hematology (ASH) 0006-4971 00064971 1528-0020 15280020 |
| shingle_catch_all_2 | Gene dosage effect of CUX1 in a murine model disrupts HSC homeostasis and controls the severity and mortality of MDS Hematopoiesis and Stem Cells, Myeloid Neoplasia Monosomy 7 (–7) and del(7q) are high-risk cytogenetic abnormalities common in myeloid malignancies. We previously reported that CUX1 , a homeodomain-containing transcription factor encoded on 7q22, is frequently inactivated in myeloid neoplasms, and CUX1 myeloid tumor suppressor activity is conserved from humans to Drosophila. CUX1 -inactivating mutations are recurrent in clonal hematopoiesis of indeterminate potential as well as myeloid malignancies, in which they independently carry a poor prognosis. To determine the role for CUX1 in hematopoiesis, we generated 2 short hairpin RNA-based mouse models with ~54% (Cux1 mid ) or ~12% (Cux1 low ) residual CUX1 protein. Cux1 mid mice develop myelodysplastic syndrome (MDS) with anemia and trilineage dysplasia, whereas CUX1 low mice developed MDS/myeloproliferative neoplasms and anemia. In diseased mice, restoration of CUX1 expression was sufficient to reverse the disease. CUX1 knockdown bone marrow transplant recipients exhibited a transient hematopoietic expansion, followed by a reduction of hematopoietic stem cells (HSCs), and fatal bone marrow failure, in a dose-dependent manner. RNA-sequencing after CUX1 knockdown in human CD34 + cells identified a –7/del(7q) MDS gene signature and altered differentiation, proliferative, and phosphatidylinositol 3-kinase (PI3K) signaling pathways. In functional assays, CUX1 maintained HSC quiescence and repressed proliferation. These homeostatic changes occurred in parallel with decreased expression of the PI3K inhibitor, Pik3ip1 , and elevated PI3K/AKT signaling upon CUX1 knockdown. Our data support a model wherein CUX1 knockdown promotes PI3K signaling, drives HSC exit from quiescence and proliferation, and results in HSC exhaustion. Our results also demonstrate that reduction of a single 7q gene, Cux1 , is sufficient to cause MDS in mice. An, N., Khan, S., Imgruet, M. K., Gurbuxani, S. K., Konecki, S. N., Burgess, M. R., McNerney, M. E. American Society of Hematology (ASH) 0006-4971 00064971 1528-0020 15280020 |
| shingle_catch_all_3 | Gene dosage effect of CUX1 in a murine model disrupts HSC homeostasis and controls the severity and mortality of MDS Hematopoiesis and Stem Cells, Myeloid Neoplasia Monosomy 7 (–7) and del(7q) are high-risk cytogenetic abnormalities common in myeloid malignancies. We previously reported that CUX1 , a homeodomain-containing transcription factor encoded on 7q22, is frequently inactivated in myeloid neoplasms, and CUX1 myeloid tumor suppressor activity is conserved from humans to Drosophila. CUX1 -inactivating mutations are recurrent in clonal hematopoiesis of indeterminate potential as well as myeloid malignancies, in which they independently carry a poor prognosis. To determine the role for CUX1 in hematopoiesis, we generated 2 short hairpin RNA-based mouse models with ~54% (Cux1 mid ) or ~12% (Cux1 low ) residual CUX1 protein. Cux1 mid mice develop myelodysplastic syndrome (MDS) with anemia and trilineage dysplasia, whereas CUX1 low mice developed MDS/myeloproliferative neoplasms and anemia. In diseased mice, restoration of CUX1 expression was sufficient to reverse the disease. CUX1 knockdown bone marrow transplant recipients exhibited a transient hematopoietic expansion, followed by a reduction of hematopoietic stem cells (HSCs), and fatal bone marrow failure, in a dose-dependent manner. RNA-sequencing after CUX1 knockdown in human CD34 + cells identified a –7/del(7q) MDS gene signature and altered differentiation, proliferative, and phosphatidylinositol 3-kinase (PI3K) signaling pathways. In functional assays, CUX1 maintained HSC quiescence and repressed proliferation. These homeostatic changes occurred in parallel with decreased expression of the PI3K inhibitor, Pik3ip1 , and elevated PI3K/AKT signaling upon CUX1 knockdown. Our data support a model wherein CUX1 knockdown promotes PI3K signaling, drives HSC exit from quiescence and proliferation, and results in HSC exhaustion. Our results also demonstrate that reduction of a single 7q gene, Cux1 , is sufficient to cause MDS in mice. An, N., Khan, S., Imgruet, M. K., Gurbuxani, S. K., Konecki, S. N., Burgess, M. R., McNerney, M. E. American Society of Hematology (ASH) 0006-4971 00064971 1528-0020 15280020 |
| shingle_catch_all_4 | Gene dosage effect of CUX1 in a murine model disrupts HSC homeostasis and controls the severity and mortality of MDS Hematopoiesis and Stem Cells, Myeloid Neoplasia Monosomy 7 (–7) and del(7q) are high-risk cytogenetic abnormalities common in myeloid malignancies. We previously reported that CUX1 , a homeodomain-containing transcription factor encoded on 7q22, is frequently inactivated in myeloid neoplasms, and CUX1 myeloid tumor suppressor activity is conserved from humans to Drosophila. CUX1 -inactivating mutations are recurrent in clonal hematopoiesis of indeterminate potential as well as myeloid malignancies, in which they independently carry a poor prognosis. To determine the role for CUX1 in hematopoiesis, we generated 2 short hairpin RNA-based mouse models with ~54% (Cux1 mid ) or ~12% (Cux1 low ) residual CUX1 protein. Cux1 mid mice develop myelodysplastic syndrome (MDS) with anemia and trilineage dysplasia, whereas CUX1 low mice developed MDS/myeloproliferative neoplasms and anemia. In diseased mice, restoration of CUX1 expression was sufficient to reverse the disease. CUX1 knockdown bone marrow transplant recipients exhibited a transient hematopoietic expansion, followed by a reduction of hematopoietic stem cells (HSCs), and fatal bone marrow failure, in a dose-dependent manner. RNA-sequencing after CUX1 knockdown in human CD34 + cells identified a –7/del(7q) MDS gene signature and altered differentiation, proliferative, and phosphatidylinositol 3-kinase (PI3K) signaling pathways. In functional assays, CUX1 maintained HSC quiescence and repressed proliferation. These homeostatic changes occurred in parallel with decreased expression of the PI3K inhibitor, Pik3ip1 , and elevated PI3K/AKT signaling upon CUX1 knockdown. Our data support a model wherein CUX1 knockdown promotes PI3K signaling, drives HSC exit from quiescence and proliferation, and results in HSC exhaustion. Our results also demonstrate that reduction of a single 7q gene, Cux1 , is sufficient to cause MDS in mice. An, N., Khan, S., Imgruet, M. K., Gurbuxani, S. K., Konecki, S. N., Burgess, M. R., McNerney, M. E. American Society of Hematology (ASH) 0006-4971 00064971 1528-0020 15280020 |
| shingle_title_1 | Gene dosage effect of CUX1 in a murine model disrupts HSC homeostasis and controls the severity and mortality of MDS |
| shingle_title_2 | Gene dosage effect of CUX1 in a murine model disrupts HSC homeostasis and controls the severity and mortality of MDS |
| shingle_title_3 | Gene dosage effect of CUX1 in a murine model disrupts HSC homeostasis and controls the severity and mortality of MDS |
| shingle_title_4 | Gene dosage effect of CUX1 in a murine model disrupts HSC homeostasis and controls the severity and mortality of MDS |
| timestamp | 2025-07-31T23:45:19.363Z |
| titel | Gene dosage effect of CUX1 in a murine model disrupts HSC homeostasis and controls the severity and mortality of MDS |
| titel_suche | Gene dosage effect of CUX1 in a murine model disrupts HSC homeostasis and controls the severity and mortality of MDS |
| topic | W WW-YZ |
| uid | ipn_articles_6283210 |