CD34 positive cells of bone marrow samples from normal and MDS samples were cultured ex vivo into erythroid conditions.
Defective nuclear localization of Hsp70 is associated with dyserythropoiesis and GATA-1 cleavage in myelodysplastic syndromes.
Specimen part
View SamplesIn the field of MDS and on bone marrow mononuclear cells , we search for a signature which predict the response to Lenalidomide treatment.
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Specimen part, Disease
View SamplesThousands of long intergenic noncoding RNAs (lincRNAs) are encoded by the mammalian genome, which were reported to have multiple biological functions as transcriptional activators acting in cis 1 or trans 2, transcriptional repressors 3,4 or miRNAs decoys 5,6. However, the function of most lincRNAs has not yet been identified in vivo. Here, we demonstrate a role for linc-MYH, a novel long intergenic noncoding RNA, in adult fast-type myofibre specialization. Skeletal myofibre fast and slow phenotypes are established through differential expression of numerous fibre-specific genes7. We show linc-MYH and the fast MYH genes share a common enhancer located in the fast MYH genes locus and regulated by the Six1 homeoproteins. Muscle-specific Six1 mutant mice show increased expression of slow-type genes, and downregulation of linc-MYH and fast-type genes. linc-MYH function revealed by in vivo knockdown and wide transcriptomic analysis, is in fine to prevent expression of genes ensuring slow muscle contractile properties, and to increase fast-type muscle gene expression in fast-type myofibres. Thus, formation of efficient fast sarcomeric units and appropriate Ca++ cycling and excitation/contraction/relaxation coupling in fast- myofibres is achieved through the coordiante control of fast MYHs and linc-MYH expression by a Six bound enhancer.
Six homeoproteins and a Iinc-RNA at the fast MYH locus lock fast myofiber terminal phenotype.
Age, Specimen part
View SamplesAPC is a key regulator of canonical Wnt signalling since it participates to beta-catenin targeting to proteasomal degradation when the pathway is inactive. Moreover, independently of Wnt signaling, APC regulates several cellular functions such as mycrotubule dynamics, chromosome segregation, cell adhesion. Although APC has been widely studied for its implication in initation and progression of several cancers, its role in satellite cells (skeletal muscle stem cells) has never been investigated.
APC is required for muscle stem cell proliferation and skeletal muscle tissue repair.
Specimen part
View SamplesRegeneration of the adult skeletal muscle tissue relies on a population of muscle stem cells called satellite cells. During tissue repair, satellite cells exhibit active canonical Wnt/beta-catenin signaling.
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View SamplesSix homeoproteins regulate fast MYH expression and calcium homeostasis
No associated publication
Age, Specimen part
View SamplesThe aim of the experiment was to compare the transcriptome of Six1-/-Six4-/- and control embryos in order to identify genes under the control of Six proteins at E10.5.<br></br><br></br>E10.5 embryos were eviscerated, head and limbs were discarded, the neural tube was removed, and RNAs were prepared with the remaining axial tissues. <br></br><br></br>E10.5 RNAs from three SixdKO and two control embryos were hybridized on Affymetrix mouse genome 430A2.0 arrays (Affymetrix, Strasbourg - France).
No associated publication
Age, Specimen part
View SamplesThe aim of the experiment was to compare the transcriptome of Six1-/-Six4-/- and control embryos in order to identify genes under the control of Six proteins at E18.5. E18.5 RNAs from back muscles of three SixdKO and two control embryos were hybridized on Affymetrix mouse genome 430A2.0 arrays (Affymetrix, Strasbourg - France).
No associated publication
Age, Specimen part
View SamplesRegeneration of the adult skeletal muscle tissue relies on a population of muscle stem cells called satellite cells. During tisse repair, satellite cells exhibit active canonical Wnt/beta-catenin signaling. Rspo1 is a modulator of Wnt signaling in many tissue, and is expressed by muscle progenitor cells.
No associated publication
Specimen part
View SamplesHere, we investigated the role of EphA4 in the molecular response to sleep deprivation by measuring forebrain gene expression in EphA4 KO mice. More precisely, we measured the effect of the mutation and of a 6-h sleep deprivation on genome-wide forebrain gene expression using microarray. Please cite the original paper when you use these data (Freyburger et al., Sleep, 2016)
No associated publication
Specimen part
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