Muscle-specific increased expression of JAG1 improves the skeletal muscle phenotype in dystrophin-deficient mice

• 成果类型: Article
• 署名作者: de Souza Leite, Felipe; Lambert, Matthias R.; Zhang, Tracy Yuanfan; Conner, James R.; Paulo, Joao A.; Furtado Oliveira, Sheldon; Thakurta, Sanjukta Guha; Bowles, Jennifer; Gussoni, Emanuela; Gygi, Steven P.; Widrick, Jeffrey J.; Kunkel, Louis M.
• 署名单位: Harvard University; Harvard University Medical Affiliates; Boston Children's Hospital; Harvard University; Harvard Medical School; Harvard University; Harvard University Medical Affiliates; Boston Children's Hospital; Harvard University; Harvard University Medical Affiliates; Boston Children's Hospital
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-8677
• DOI: 10.1073/pnas.2506437122
• 发表日期: 2025-09-30
• 关键词: decoy search strategy; muscular-dystrophy; satellite cells; protein-phosphorylation; mass-spectrometry; duchenne; dysferlin; pathology; gene; manifestation

摘要

Therapeutic strategies for Duchenne muscular dystrophy (DMD) will likely require complementary approaches. One possibility is to explore genetic modifiers that improve muscle regeneration and function. The beneficial effects of the overexpression of Jagged-1 were described in escaper golden retriever muscular dystrophy (GRMD) dogs that had a near-normal life and validated in dystrophin-deficient zebrafish. To clarify the underlying biology of JAG1 overexpression in dystrophic muscles, we generated a transgenic mouse (mdx5cv-JAG1) model that lacks dystrophin and overexpresses human JAG1 in striated muscles. Skeletal muscles from mdx5cv-JAG1 and mdx5cv mice were studied at 1-, 4-, and 12-mo time points. JAG1 expression in mdx5cv-JAG1 increased by 3 to 5 times compared to mdx5cv. Consequently, mdx5cv-JAG1 muscles were significantly bigger and stronger than dystrophic controls, along with an increased number of myofibers. Proteomics data show increased dysferlin in mdx5cv-JAG1 muscles and an association of the histone methyltransferase Nsd1 with the phenotype. Our data support the positive effect ofJAG1 overexpression in dystrophic muscles.