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Updated: Jul 18, 2026
Proliferation and Differentiation of Murine Myeloid Precursor 32D/G-CSF-R Cells
Published on: February 21, 2018
Characterization of the Drosophila myeloid leukemia factor
Séverine Martin-Lannerée1, Christelle Lasbleiz, Matthieu Sanial
1Laboratoire de Génétique du Développement et Evolution, Institut Jacques Monod, UMR 7592 CNRS Université Paris 6 et Paris 7, 2 place Jussieu, 75 251 Paris Cedex 05, France.
Abstract:
In human, the myeloid leukemia factor 1 (hMLF1) has been shown to be involved in acute leukemia, and mlf related genes are present in many animals. Despite their extensive representation and their good conservation, very little is understood about their function. In Drosophila, dMLF physically interacts with both the transcription regulatory factor DREF and an antagonist of the Hedgehog pathway, Suppressor of Fused, whose over-expression in the fly suppresses the toxicity induced by polyglutamine. No connection between these data has, however, been established. Here, we show that dmlf is widely and dynamically expressed during fly development. We isolated and analyzed the first dmlf mutants: embryos lacking maternal dmlf product have a low viability with no specific defect, and dmlf(-)- adults display weak phenotypes. We monitored dMLF subcellular localization in the fly and cultured cells. We were able to show that, although generally nuclear, dMLF can also be cytoplasmic, depending on the developmental context. Furthermore, two differently spliced variants of dMLF display differential subcellular localization, allowing the identification of regions of dMLF potentially important for its localization. Finally, we demonstrate that dMLF can act developmentally and postdevelopmentally to suppress neurodegeneration and premature aging in a cerebellar ataxia model.
Insights
Myeloid leukemia factor 1 (MLF1) gene function remains unclear. This study reveals MLF1
Area of Science:
- Molecular Biology
- Developmental Biology
- Genetics
Background:
- Human myeloid leukemia factor 1 (hMLF1) is implicated in acute leukemia.
- MLF1-related genes are conserved across species, but their functions are largely unknown.
- Drosophila dMLF interacts with transcription factor DREF and Hedgehog pathway antagonist Suppressor of Fused.
Purpose of the Study:
- To investigate the function and developmental role of dMLF in Drosophila.
- To analyze dMLF expression patterns, subcellular localization, and the impact of its variants.
- To determine dMLF's potential in suppressing neurodegeneration and aging.
Main Methods:
- Analysis of dmlf expression patterns during fly development.
- Isolation and characterization of the first dmlf mutants.
- Monitoring of dMLF subcellular localization in vivo and in cultured cells.
- Identification of dMLF splice variants and their localization.
- Assessment of dMLF's role in a cerebellar ataxia model.
Main Results:
- Dmlf is widely and dynamically expressed throughout Drosophila development.
- Dmlf mutants exhibit low embryonic viability and weak adult phenotypes.
- dMLF exhibits context-dependent nuclear and cytoplasmic localization.
- Two spliced variants of dMLF show differential subcellular localization.
- dMLF suppresses neurodegeneration and premature aging in a cerebellar ataxia model.
Conclusions:
- Dmlf plays a dynamic role in Drosophila development.
- Differential localization of dMLF variants suggests specific functional domains.
- dMLF demonstrates therapeutic potential for neurodegenerative conditions and aging.
