Duchenne muscular dystrophy (DMD) is a severe and rapidly progressive hereditary muscular disease with X-linked recessive inheritance, occurring mainly in males. A complete loss of dystrophin resulted from out-of-frame deletion mutations in the DMD gene leads to Duchenne muscular dystrophy. DMD induced pluripotent stem cells (iPSCs) are a suitable cell model to study muscle development and disease mechanisms underlying muscular dystrophy and to screen novel compounds with potential therapeutic effects. We generated iPSCs from a DMD patient using non-integrating episomal plasmid vectors. The obtained iPSC lines showed ESC-like morphology, expression pluripotency markers, displayed a normal karyotype and possessed trilineage differentiation potential.
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http://dx.doi.org/10.1016/j.scr.2020.101941 | DOI Listing |
Unlabelled: RNA-driven protein aggregation leads to cellular dysregulation by sequestering regulatory proteins, disrupting normal cellular processes, and contributing to the development of diseases and tumorigenesis. Here, we show that double homeobox 4 (DUX4), an early embryonic transcription factor and causative gene of facioscapulohumeral muscular dystrophy (FSHD), induces the accumulation of stable intranuclear RNAs, including nucleolar-associated RNA and human satellite II (HSATII) repeat RNA. Stable intranuclear RNAs drive protein aggregation in DUX4-expressing muscle cells.
View Article and Find Full Text PDFAlthough current treatments for Duchenne Muscular Dystrophy (DMD) have proven to be effective in delaying myopathy, there remains a strong need to identify novel targets to develop additional therapies. Mitochondrial dysfunction is an early pathological feature of DMD. A fine balance of mitochondrial dynamics (fission and fusion) is crucial to maintain mitochondrial function and skeletal muscle health.
View Article and Find Full Text PDFEMBO J
January 2025
Telethon Institute of Genetics and Medicine (TIGEM), 80078, Pozzuoli, Italy.
Endoplasmic reticulum (ER) plasticity and ER-phagy are intertwined processes essential for maintaining ER dynamics. We investigated the interplay between two isoforms of the ER-phagy receptor FAM134B in regulating ER remodeling in differentiating myoblasts. During myogenesis, the canonical FAM134B1 is degraded, while its isoform FAM134B2 is transcriptionally upregulated.
View Article and Find Full Text PDFZhonghua Bing Li Xue Za Zhi
January 2025
Department of Pathology, the Seventh Medical Center of People's Liberation Army of China General Hospital, Beijing100700, China.
To analyze the morphologic changes and the extent of severity in end-stage heart disease; and to explore the correlation with their clinical features. Twelve cases of recipients who underwent pediatric cardiac allograft transplantation were collected from May 2022 to November 2023 at the Seventh Medical Center of People's Liberation Army of China General Hospital. Gross pathologic examinations were performed and morphological changes were observed under a light microscope after HE, Masson's trichrome, and reticulin staining.
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