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The Effects of Direct Factor Xa Inhibitor (Rivaroxaban) on the Human Osteoblastic Cell Line SaOS2.
MedLine Citation:
PMID:  22800431     Owner:  NLM     Status:  Publisher    
Thromboprophylaxis reduces the risk of surgery-related deep vein thrombosis, but anticoagulants were associated with systemic osteoporosis, a known risk factor for poor fracture healing. Rivaroxaban (XARELTO®) is a novel anticoagulant with specific ability to inhibit factor Xa, a serine endopeptidase, which plays a key role in coagulation. The present study investigated the direct effects of rivaroxaban on bone biology using an in vitro cell culture model from the human female osteoblastic cell line SaOS2. Cells at subconfluence were treated for 24 h with different concentrations of rivaroxaban and analyzed for DNA synthesis, creatine kinase- and alkaline phosphatase-specific activities, and treated 21 days for analyzing mineralization. Rivaroxaban 0.01-50μg/ml dose-dependently inhibited up to 60% DNA synthesis of the cells. Creatine kinase-specific activity was also inhibited dose-dependently to a similar extent by the same concentrations. Alkaline phosphatase-specific activity was dose-dependently inhibited but only up to 30%. Cell mineralization was unaffected by 10μg/ml rivaroxaban. This model demonstrated a significant rivaroxaban-induced reduction in osteoblastic cell growth and energy metabolism, and slight inhibition of the osteoblastic marker, alkaline phosphatase, while osteoblastic mineralization was unaffected. These findings might indicate that rivaroxaban inhibits the first stage of bone formation but does not affect later stages (i.e., bone mineralization).
Roy Gigi; Moshe Salai; Oleg Dolkart; Ofir Chechik; Sarah Katzburg; Naftali Stern; Dalia Somjen
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-16
Journal Detail:
Title:  Connective tissue research     Volume:  -     ISSN:  1607-8438     ISO Abbreviation:  -     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-7-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0365263     Medline TA:  Connect Tissue Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Division of Orthopedic Surgery, Metabolism and Hypertension, Tel Aviv Sourasky Medical Center , Tel-Aviv , Israel.
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