EIF4A3‐Induced Circular RNA CircDdb1 Promotes Muscle Atrophy through Encoding a Novel Protein CircDdb1‐867aa
Little is known about if and how circular RNAs (circRNAs) are involved in skeletal muscle atrophy. Here a conserved circular RNA Damage-specific DNA binding protein 1 (circDdb1), derived from the host gene encoding Damage-specific DNA binding protein 1 (DDB1), as a mechanism of muscle atrophy is identified. circDdb1 expression is markedly increased in a variety of muscle atrophy types in vivo and in vitro, and human aging muscle. Both in vivo and in vitro, ectopic expression of circDdb1 causes muscle atrophy. In contrast, multiple forms of muscle atrophy caused by dexamethasone, tumor necrosis factor-alpha (TNF-α), or angiotensin II (Ang II) in myotube cells, as well as by denervation, angiotensin II, and immobility in mice, are prevented by circDdb1 inhibition. Eukaryotic initiation factor 4A3 (EIF4A3) is identified as a regulator of circDdb1 expression in muscle atrophy, whereas circDdb1 encodes a novel protein, circDdb1-867aa. circDdb1-867aa binds with and increases the phosphorylation level of eukaryotic elongation factor 2 (eEF2) at Thr56 to reduce protein translation and promote muscle atrophy. In summary, these findings establish circDdb1 as a shared regulator of muscle atrophy across multiple diseases and a potential therapeutic target.
Authors
- Emeli Chatterjee (ORCID: https://orcid.org/0000-0002-4515-1473)
- Junjie Xiao (ORCID: https://orcid.org/0000-0002-9202-0003)
- Yuwei Yan
- Xiaolan Zhu (ORCID: https://orcid.org/0000-0002-0499-8045)
- Xinyi Ren
- Dragoş Crețoiu (ORCID: https://orcid.org/0000-0003-3214-030X)
- Dongchao Lu (ORCID: https://orcid.org/0000-0002-8578-3790)
- Ming‐Fang Wu (ORCID: https://orcid.org/0000-0002-7208-7067)
- Qing Nie (ORCID: https://orcid.org/0000-0002-8804-3368)
- Lei Chen (ORCID: https://orcid.org/0009-0008-8096-7401)
- Guoping Li (ORCID: https://orcid.org/0000-0003-3874-0744)
- Siqi Wang (ORCID: https://orcid.org/0000-0002-7121-2321)
- Zhengyu Liu (ORCID: https://orcid.org/0000-0003-4642-5955)
- Tingting Yang (ORCID: https://orcid.org/0000-0002-4655-7272)
- Xiaohang Yin
- Jin Li (ORCID: https://orcid.org/0000-0002-9920-9589)
- Qian Li (ORCID: https://orcid.org/0000-0001-7454-5001)
- Yongjun Zheng (ORCID: https://orcid.org/0000-0001-6554-1690)
- Jingying Chen
- T. Scott Bowen
- Yan Yu (ORCID: https://orcid.org/0009-0001-1551-3445)
Institutions
- Shanghai University (CN)
- Tongji University (CN)
- University of Leeds (GB)
- Harvard University (US)
- Carol Davila University of Medicine and Pharmacy (RO)
- Second Military Medical University (CN)
- Nantong University (CN)
- Fudan University (CN)
- Affiliated Hospital of Nantong University (CN)
- Massachusetts General Hospital (US)
- Shanghai University of Traditional Chinese Medicine (CN)
- Huadong Hospital (CN)
- Institutul National pentru Sanatatea Mamei si Copilului "Alessandrescu-Rusescu" (RO)
- Shanghai Pudong New Area Gongli Hospital (CN)
- Tongji Hospital (CN)
Publication Details
- Journal
- Advanced Science
- Published
- 2024-10-16
- DOI
- https://doi.org/10.1002/advs.202406986
- Citations
- 19
- Primary Topic
- Circular RNAs in diseases
- Type
- article
- Field-Weighted Citation Impact
- 4.44
Funders
- National Natural Science Foundation of China
- China Postdoctoral Science Foundation
- Science and Technology Commission of Shanghai Municipality
- Shanghai Rising-Star Program
- Biotechnology and Biological Sciences Research Council