杜氏肌营养不良
肌发生
肌营养不良
转化生长因子
心肌细胞
医学
生物
细胞生物学
遗传学
作者
Alice Granados,Maeva Zamperoni,Roberta Rapone,Maryline Moulin,Ekaterina Boyarchuk,Costas Bouyioukos,Laurence Del Maestro,Véronique Joliot,Elisa Négroni,Myriame Mohamed,Sandra Piquet,Anne Bigot,Fabien Le Grand,Sonia Albini,Slimane Ait‐Si‐Ali
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2024-05-03
卷期号:10 (18)
标识
DOI:10.1126/sciadv.adj8042
摘要
Overactivation of the transforming growth factor-β (TGFβ) signaling in Duchenne muscular dystrophy (DMD) is a major hallmark of disease progression, leading to fibrosis and muscle dysfunction. Here, we investigated the role of SETDB1 (SET domain, bifurcated 1), a histone lysine methyltransferase involved in muscle differentiation. Our data show that, following TGFβ induction, SETDB1 accumulates in the nuclei of healthy myotubes while being already present in the nuclei of DMD myotubes where TGFβ signaling is constitutively activated. Transcriptomics revealed that depletion of SETDB1 in DMD myotubes leads to down-regulation of TGFβ target genes coding for secreted factors involved in extracellular matrix remodeling and inflammation. Consequently, SETDB1 silencing in DMD myotubes abrogates the deleterious effect of their secretome on myoblast differentiation by impairing myoblast pro-fibrotic response. Our findings indicate that SETDB1 potentiates the TGFβ–driven fibrotic response in DMD muscles, providing an additional axis for therapeutic intervention.
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