Comparative Transcriptomics Identifies Novel Genes and Pathways Involved in Post-Traumatic Osteoarthritis Development and Progression
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Sciences Directorate
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Sciences Directorate; Univ. of California, Merced, CA (United States). School of Natural Sciences
- Regeneron Pharmaceuticals, Tarrytown, NY (United States)
- UC Davis Medical Center, Sacramento, CA (United States). Dept. of Orthopedic Surgery
Anterior cruciate ligament (ACL) injuries often result in post-traumatic osteoarthritis (PTOA). To better understand the molecular mechanisms behind PTOA development following ACL injury, we profiled ACL injury-induced transcriptional changes in knee joints of three mouse strains with varying susceptibility to OA: STR/ort (highly susceptible), C57BL/6J (moderately susceptible) and super-healer MRL/MpJ (not susceptible). Right knee joints of the mice were injured using a non-invasive tibial compression injury model and global gene expression was quantified before and at 1-day, 1-week, and 2-weeks post-injury using RNA-seq. Following injury, injured and uninjured joints of STR/ort and injured C57BL/6J joints displayed significant cartilage degeneration while MRL/MpJ had little cartilage damage. Gene expression analysis suggested that prolonged inflammation and elevated catabolic activity in STR/ort injured joints, compared to the other two strains may be responsible for the severe PTOA phenotype observed in this strain. MRL/MpJ had the lowest expression values for several inflammatory cytokines and catabolic enzymes activated in response to ACL injury. Furthermore, we identified several genes highly expressed in MRL/MpJ compared to the other two strains including B4galnt2 and Tpsab1 which may contribute to enhanced healing in the MRL/MpJ. Overall, this study has increased our knowledge of early molecular changes associated with PTOA development.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Univ. of California, Merced, CA (United States); UC Davis Medical Center, Sacramento, CA (United States)
- Sponsoring Organization:
- USDOE; USDOD; National Inst. of Health (NIH) (United States)
- Grant/Contract Number:
- AC52-07NA27344; OR130220; AR062603
- OSTI ID:
- 1476231
- Report Number(s):
- LLNL-JRNL-747404; 932332
- Journal Information:
- International Journal of Molecular Sciences (Online), Vol. 19, Issue 9; ISSN 1422-0067
- Publisher:
- MDPICopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Osteoarthritis and Cartilage Regeneration: Focus on Pathophysiology and Molecular Mechanisms
|
journal | December 2019 |
Global Gene Expression Analysis Identifies Age-Related Differences in Knee Joint Transcriptome during the Development of Post-Traumatic Osteoarthritis in Mice
|
journal | January 2020 |
Osteoarthritis and Cartilage Regeneration: Focus on Pathophysiology and Molecular Mechanisms
|
text | January 2019 |
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