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- W4224091549 abstract "Abstract Mutations of the DMD gene, encoding dystrophins, cause Duchenne muscular dystrophy (DMD). Some tumors also display altered dystrophin expression and recent studies identified a developmental onset of DMD. Given that embryogenesis and carcinogenesis share many mechanisms, we analyzed a broad spectrum of tumors to establish whether dystrophin loss evokes related outcomes. Transcriptomic, proteomic, and mutation datasets from fifty tumor tissues and matching controls (10,894 samples) and 140 corresponding tumor cell lines were analyzed. Interestingly, DMD expression was widespread across healthy tissues at levels comparable to housekeeping genes. In 80% of tumors, DMD expression was reduced due to transcriptional downregulation and not somatic mutations. The full-length transcript encoding Dp427 was decreased in 68% of tumors, while Dp71 variants showed variability of expression. Hierarchical clustering analysis of DMD transcripts distinguished malignant from control tissues. Transcriptomes of primary tumors and tumor cell lines with low DMD expression showed enrichment of specific pathways in the differentially expressed genes. Pathways consistently identified: ECM-receptor interaction, calcium signaling and PI3K-Akt, are also altered in DMD muscle. Notably, low DMD expression was associated with a more advanced stage, older age of onset, and reduced survival across different tumors. Thus, DMD transcription occurs throughout a spectrum of normal tissues. The molecular signature associated with its frequent downregulation in malignancies is concordant with changes found in Duchenne muscles, even though these malignancies originate from tissues never previously associated with dystrophin expression or function. Therefore, the importance of this largest known gene extends beyond its roles identified in DMD, certainly into oncology." @default.
- W4224091549 created "2022-04-19" @default.
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- W4224091549 date "2022-04-05" @default.
- W4224091549 modified "2023-10-16" @default.
- W4224091549 title "Loss of DMD gene expression results in Duchenne-like molecular abnormalities across diverse tissues" @default.
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- W4224091549 doi "https://doi.org/10.1101/2022.04.04.486990" @default.
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