Cited by 80Platelet Disorders and TreatmentsAcute Myeloid Leukemia ResearchBlood Coagulation and Thrombosis Mechanisms

MAL/SRF complex is involved in platelet formation and megakaryocyte migration by regulating MYL9 (MLC2) and MMP9

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Gilles, Laure, Bluteau, Dominique, Boukour, Siham, Chang, Yunhua, Zhang, Yanyan, Robert, Thomas, Dessen, Philippe, Debili, Najet +3 more·2009·Blood

Abstract

Megakaryoblastic leukemia 1 (MAL) is a transcriptional coactivator of serum response factor (SRF). In acute megakaryoblastic leukemia, the MAL gene is translocated and fused with the gene encoding one twenty-two (OTT). Herein, we show that MAL expression increases during the late differentiation steps of neonate and adult human megakaryopoiesis and localized into the nucleus after Rho GTPase activation by adhesion on collagen I or convulxin. MAL knockdown in megakaryocyte progenitors reduced the percentage of cells forming filopodia, lamellipodia, and stress fibers after adhesion on the same substrates, and reduced proplatelet formation. MAL repression led to dysmorphic megakaryocytes with disorganized demarcation membranes and alpha granules heterogeneously scattered in the cytoplasm. Gene expression profiling revealed a marked decrease in metalloproteinase 9 (MMP-9) and MYL9 expression after MAL inhibition. Luciferase assays in HEK293T cells and chromatin immunoprecipitation in primary megakaryocytes showed that the MAL/SRF complex directly regulates MYL9 and MMP9 in vitro. Megakaryocyte migration in response to stromal cell-derived factor 1, through Matrigel was considerably decreased after MAL knockdown, implicating MMP9 in migration. Finally, the use of a shRNA to decrease MYL9 expression showed that MYL9 was involved in proplatelet formation. MAL/SRF complex is thus involved in platelet formation and megakaryocyte migration by regulating MYL9 and MMP9.

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Crossref · 10.1182/blood-2009-03-209932

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Authors
Gilles, L., Bluteau, D., Boukour, S., Chang, Y., Zhang, Y., Robert, T., Dessen, P., Debili, N., Bernard, O. A., Vainchenker, W., & Raslova, H.
Affiliations
  • Inserm (FR)
  • Institut Gustave Roussy (FR)
  • Centre National de la Recherche Scientifique (FR)
  • Hôpital Necker-Enfants Malades (FR)
  • Inserm, U790, Villejuif;
Venue
Blood
Published
2009-11-05
Volume
114
Issue
19
Pages
4221-4232
ISSN
  • 0006-4971 (ISSN-L)
  • 1528-0020
OpenAlex
W1985551247
Cited by
80
References
65
Citations by year
2026: 3 · 2025: 2 · 2024: 3 · 2023: 2 · 2022: 2 · 2021: 10 · 2020: 3 · 2019: 6 · 2018: 3 · 2017: 6 · 2016: 8 · 2015: 6 · 2014: 3 · 2013: 8 · 2012: 6
FWCI
3.33
Type
journal article
Language
en
Open access
Locations
  • Blood (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Association pour la Recherche sur le Cancer
  • Agence Nationale de la Recherche
  • Fondation de France
  • Takeda Oncology
Topics
  • Health Sciences › Medicine › Hematology › Platelet Disorders and Treatments
  • Health Sciences › Medicine › Hematology › Acute Myeloid Leukemia Research
  • Health Sciences › Medicine › Hematology › Blood Coagulation and Thrombosis Mechanisms
Keywords
serum response factor, megakaryopoiesis, megakaryocyte migration, proplatelet formation, MYL9, MMP-9, Rho GTPase activation, cell adhesion, CXCL12, megakaryoblastic leukemia, transcriptional regulation, demarcation membranes, alpha-granules
MeSH terms
Adult, Blood Platelets, Cell Differentiation, Cell Line, Cell Movement, DNA-Binding Proteins, Fetal Blood, Humans, Infant, Newborn, Megakaryocytes, Oncogene Proteins, Fusion, Trans-Activators, Myosin Light Chains, Oligonucleotide Array Sequence Analysis, rho GTP-Binding Proteins, Matrix Metalloproteinase 9, Gene Expression Profiling, Focal Adhesions, Cardiac Myosins, Serum Response Factor, Thrombopoiesis, RNA, Small Interfering, Multiprotein Complexes, In Vitro Techniques

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