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Title: Comparative Transcriptomics Identifies Novel Genes and Pathways Involved in Post-Traumatic Osteoarthritis Development and Progression

Journal Article · · International Journal of Molecular Sciences (Online)
DOI:https://doi.org/10.3390/ijms19092657· OSTI ID:1476231
ORCiD logo [1];  [2];  [2];  [1];  [3];  [3];  [4];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Physical and Life Sciences Directorate
  2. 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
  3. Regeneron Pharmaceuticals, Tarrytown, NY (United States)
  4. 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
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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Cited By (3)

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