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Whole genome miRNA analysis of in-vitro differentiated myotubes from Emery-Dreifuss Muscular Dystrophy patients.

ABSTRACT: Emery-Dreifuss muscular dystrophy (EDMD) is a genetically and clinically variable disorder. Here we performed transcriptome analysis on 10 EDMD patients covering mutations in 7 EDMD-linked genes, compared to 2 healthy controls. Myoblasts were isolated from muscle biopsies and differentiated in-vitro for 6 days. Differentiated myotubes were isolated, total RNA extracted and the small <200 nt fraction sequenced. The genes and mutations included were: patient 1 (TMEM214, p.R179H), patient 2 (PLPP7/NET39, p.M92K), patient 3 (SUN1, p.G68D, p.G388S), patient 4 (SYNE1, p.6869*, p.6869*), patient 5 (EMD, p.S58Sfs*1), patient 6 (FHL1, c.688+1G>A), patient 7 (FHL1, p.C224W), patient 8 (FHL1, p.V280M), patient 9 (LMNA, p.T528K), patient 10 (LMNA, p.R571S).

ORGANISM(S): Homo sapiens

PROVIDER: GSE204826 | GEO | 2022/10/31

REPOSITORIES: GEO

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Transcriptome analysis of in-vitro differentiated myotubes from Emery-Dreifuss Muscular Dystrophy patients.

Project description:Emery-Dreifuss muscular dystrophy (EDMD) is a genetically and clinically variable disorder. Here we performed transcriptome analysis on 10 EDMD patients covering mutations in 7 EDMD-linked genes, compared to 2 healthy controls. Myoblasts were isolated from muscle biopsies and differentiated in-vitro for 6 days. Differentiated myotubes were isolated, total RNA extracted, and mRNA sequenced. The genes and mutations included were: patient 1 (TMEM214, p.R179H), patient 2 (PLPP7/NET39, p.M92K), patient 3 (SUN1, p.G68D, p.G388S), patient 4 (SYNE1, p.6869*, p.6869*), patient 5 (EMD, p.S58Sfs*1), patient 6 (FHL1, c.688+1G>A), patient 7 (FHL1, p.C224W), patient 8 (FHL1, p.V280M), patient 9 (LMNA, p.T528K), patient 10 (LMNA, p.R571S). The patients were found to segregate into 3 subgroups, defined as: gp1 = patients 1,2,5,7 and 10; gp2 = patients 3,6, and 8; gp3 = patients 4 and 9.

2022-10-31 | GSE204804 | GEO

Net39 protects muscle nuclei from mechanical stress during the pathogenesis of Emery-Dreifuss muscular dystrophy [ChIP-seq]

Project description:Mutations in genes encoding nuclear envelope proteins lead to diseases known as nuclear envelopathies, characterized by skeletal muscle and heart abnormalities, such as Emery-Dreifuss Muscular Dystrophy (EDMD). The tissue-specific role of the nuclear envelope in the etiology of these diseases has not been extensively explored. We previously showed that global deletion of the muscle-specific nuclear envelope protein NET39 in mice leads to neonatal lethality due to skeletal muscle dysfunction. To study the potential role of the Net39 gene in adulthood, we generated a muscle-specific conditional knockout (cKO) of Net39 in mice. cKO mice recapitulated key skeletal muscle features of EDMD, including muscle wasting, impaired muscle contractility, abnormal myonuclear morphology, and DNA damage. The loss of Net39 rendered myoblasts hypersensitive to mechanical stretch, resulting in stretch-induced DNA damage. Net39 was downregulated in a mouse model of congenital myopathy, and restoration of Net39 expression through AAV gene delivery extended lifespan and ameliorated the muscle abnormalities. These findings establish NET39 as a direct contributor to the pathogenesis of EDMD by protecting against mechanical stress and DNA damage.

2023-06-08 | GSE232046 | GEO

Net39 protects muscle nuclei from mechanical stress during the pathogenesis of Emery-Dreifuss muscular dystrophy [RNA-seq]

2023-06-08 | GSE232047 | GEO

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2023-06-08 | GSE232048 | GEO

The nuclear envelope protein Net39 is essential for nuclear integrity, chromatin organization, and muscle growth (RNA-Seq)

Project description:Lamins and transmembrane proteins within the nuclear envelope are regulators of nuclear structure and chromatin organization. Nuclear Envelope Transmembrane Protein 39 (Net39) is a muscle-restricted nuclear envelope protein. We show that mice lacking Net39 succumb to severe myopathy and neonatal lethality, with concomitant disruption in nuclear integrity, chromatin accessibility, gene expression and metabolism. These abnormalities resemble those of Emery-Dreifuss muscular dystrophy (EDMD), caused by mutations in A-type Lamins (LMNA) and other genes, like Emerin (EMD). We observe that Net39 is downregulated in EDMD patients, implicating Net39 in the pathogenesis of this disorder. Our findings reveal an intimate role for the nuclear envelope in maintaining muscle chromatin organization, gene expression and function, and highlight the importance of Net39 in these processes and in the molecular etiology of EDMD.

2020-11-24 | GSE154849 | GEO

The nuclear envelope protein Net39 is essential for nuclear integrity, chromatin organization, and muscle growth (ChIP-Seq)

2020-11-24 | GSE154848 | GEO

The nuclear envelope protein Net39 is essential for nuclear integrity, chromatin organization, and muscle growth (ATAC-Seq)

2020-11-24 | GSE154847 | GEO

The nuclear envelope protein Net39 is essential for muscle nuclear integrity and chromatin organization

Project description:Lamins and transmembrane proteins within the nuclear envelope regulate nuclear structure and chromatin organization. Nuclear Envelope Transmembrane Protein 39 (Net39) is muscle nuclear envelope protein whose functions in vivo have not been explored. We show that mice lacking Net39 succumb to severe myopathy and juvenile lethality, with concomitant disruption in nuclear integrity, chromatin accessibility, gene expression and metabolism. These abnormalities resemble those of Emery-Dreifuss muscular dystrophy (EDMD), caused by mutations in A-type Lamins (LMNA) and other genes, like Emerin (EMD). We observe that Net39 is downregulated in EDMD patients, implicating Net39 in the pathogenesis of this disorder. Our findings highlight the role of Net39 at the nuclear envelope in maintaining muscle chromatin organization, gene expression and function, and its potential contribution to the molecular etiology of EDMD.

2020-11-23 | GSE154850 | GEO

Net39 protects muscle nuclei from mechanical stress during the pathogenesis of Emery-Dreifuss muscular dystrophy.

Project description:Net39 protects muscle nuclei from mechanical stress during the pathogenesis of Emery-Dreifuss muscular dystrophy.

| PRJNA970705 | ENA

Emery-Dreifuss muscular dystrophy.

Project description:Emery-Dreifuss muscular dystrophy (EDMD) is a rare muscular dystrophy, but is particularly important to diagnose due to frequent life-threatening cardiac complications. EDMD classically presents with muscle weakness, early contractures, cardiac conduction abnormalities and cardiomyopathy, although the presence and severity of these manifestations vary by subtype and individual. Associated genes include EMD, LMNA, SYNE1, SYNE2, FHL1, TMEM43, SUN1, SUN2, and TTN, encoding emerin, lamin A/C, nesprin-1, nesprin-2, FHL1, LUMA, SUN1, SUN2, and titin, respectively. The Online Mendelian Inheritance in Man database recognizes subtypes 1 through 7, which captures most but not all of the associated genes. Genetic diagnosis is essential whenever available, but traditional diagnostic tools can help steer the evaluation toward EDMD and assist with interpretation of equivocal genetic test results. Management is primarily supportive, but it is important to monitor patients closely, especially for potential cardiac complications. There is a high potential for progress in the treatment of EDMD in the coming years.

| S-EPMC7154529 | biostudies-literature

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