GAS5 protects against osteoporosis by targeting UPF1/SMAD7 axis in osteoblast differentiation
- Sun Yat-sen Memorial Hospital, Sun Yat-sen University, China
- The Eighth Affiliated Hospital, Sun Yat-sen University, China
- Zhujiang Hospital, Southern Medical University, China
Abstract
Osteoporosis is a common systemic skeletal disorder resulting in bone fragility and increased fracture risk. It is still necessary to explore its detailed mechanisms and identify novel targets for the treatment of osteoporosis. Previously, we found that a lncRNA named GAS5 in human could negatively regulate the lipoblast/adipocyte differentiation. However, it is still unclear whether GAS5 affects osteoblast differentiation and whether GAS5 is associated with osteoporosis. Our current research found that GAS5 was decreased in the bones and BMSCs, a major origin of osteoblast, of osteoporosis patients. Mechanistically, GAS5 promotes the osteoblast differentiation by interacting with UPF1 to degrade SMAD7 mRNA. Moreover, a decreased bone mass and impaired bone repair ability were observed in Gas5 heterozygous mice, manifesting in osteoporosis. The systemic supplement of Gas5-overexpressing adenoviruses significantly ameliorated bone loss in an osteoporosis mouse model. In conclusion, GAS5 promotes osteoblast differentiation by targeting the UPF1/SMAD7 axis and protects against osteoporosis.
Data availability
The relevant data are available from Dryad (DOI: https://doi.org/10.5061/dryad.9cnp5hqfj). Primers of the analyzed genes (Supplementary Table 1), the siRNA sequences of the analyzed genes (Supplementary Table 2), characteristics of the study subjects (Supplementary Table 3) and Characteristics of the 15 healthy donors (Supplementary Table 4) can be found in the supplementary documents.
-
GAS5 protects against osteoporosis by targeting UPF1/Smad7 axis in osteoblast differentiationDryad Digital Repository, doi:10.5061/dryad.9cnp5hqfj.
Article and author information
Author details
Funding
National Natural Science Foundation of China (81971518,81672097,81871750,81702120)
- Zhongyu Xie
- Peng Wang
- Yanfeng Wu
- Huiyong Shen
Ken Realm R&D Program of Guangdong Province (2019B020236001)
- Huiyong Shen
Fundamental Research Funds for the Central Universities (19ykpy01)
- Zhongyu Xie
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Ethics
Animal experimentation: This study was performed in strict accordance with the recommendations in the Guide for the Care and Use of Laboratory Animals of Eighth Affiliated Hospital of Sun Yat-sen University. All procedures involving animals were approved by the Animal Use and Care Committee of the Eighth Affiliated Hospital of Sun Yat-sen University (approval number: SYSU-IACUC-2018-B10325).
Human subjects: The study was approved by the ethics committee of the Eighth Affiliated Hospital of Sun Yat-sen University (approval number: 2018r010) and it was performed in strict accordance with the recommendations of ethics committee. After explaining in detail the possible risks and importance of the research, as well as informing methods of privacy protection, we obtained the informed consent and consent publish signatures of all patients or normal donors.
Copyright
© 2020, Li et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
Metrics
-
- 1,312
- views
-
- 243
- downloads
-
- 32
- citations
Views, downloads and citations are aggregated across all versions of this paper published by eLife.
Download links
Further reading
-
- Cell Biology
Distal appendages are ninefold symmetric blade-like structures attached to the distal end of the mother centriole. These structures are critical for the formation of the primary cilium, by regulating at least four critical steps: preciliary vesicle recruitment, recruitment and initiation of intraflagellar transport (IFT), and removal of CP110. While specific proteins that localize to the distal appendages have been identified, how exactly each protein functions to achieve the multiple roles of the distal appendages is poorly understood. Here, we comprehensively analyze known and newly discovered distal appendage proteins (CEP83, SCLT1, CEP164, TTBK2, FBF1, CEP89, KIZ, ANKRD26, PIDD1, LRRC45, NCS1, CEP15) for their precise localization, order of recruitment, and their roles in each step of cilia formation. Using CRISPR-Cas9 knockouts, we show that the order of the recruitment of the distal appendage proteins is highly interconnected and a more complex hierarchy. Our analysis highlights two protein modules, CEP83-SCLT1 and CEP164-TTBK2, as critical for structural assembly of distal appendages. Functional assays revealed that CEP89 selectively functions in the RAB34+ vesicle recruitment, while deletion of the integral components, CEP83-SCLT1-CEP164-TTBK2, severely compromised all four steps of cilium formation. Collectively, our analyses provide a more comprehensive view of the organization and the function of the distal appendage, paving the way for molecular understanding of ciliary assembly.
