J Korean Soc Osteoporos.  2010 Aug;8(2):171-177.

The Ability of Cyclosporine (CsA) to Induce Oxigen Free Radicals in a Rat Osteoblast Cell Line

• Jung MH
• Lee TH
• Oh YL
• Lee JY
• Yang SO
• Choi WH
• Kim HY

Abstract

OBJECTIVES
This study examined the ability of Cyclosporine (CsA) to induce apoptosis in a rat osteoblast cell line.
METHODS
Rat osteoblast ROS 17/2.8 cells were cultured, and treated with with 0.1~40 microg/mL CsA for 24 hours after plating of cells. Cell viability was determined by the MTT assay. Western Blot Analysis was done with primary antibodies to caspase-3 and caspase-8. Reactive oxygen species (ROS) synthesis was measured by flowcytometry.
RESULTS
Cell viability decreased in dose-dependent manner with increasing concentrations of CsA. Treatment of ROS 17/2.8 cells with 0.1, 0.5, 1, 5, 10, 20, or 40 microg/mLg/mL CsA caused 85%, 80%, 73%, 60%, 45%, 40%, and 27% cell viability, respectively. Western blot analysis showed reduced caspase-3 expression and induced caspase-8. The ROS in a dose-and time-dependent manner were increased by CsA.
CONCLUSION
These results suggest that CsA can induce oxygen free radicals which appears to trigger apoptosis by activating pro-apoptotic signals. CsA plays a role in the post-transplatation bone diseases via the induction of apoptosis in osteoblast.

Keyword

Cyclosporine; Osteoblast; Apoptosis; Osteopenia

MeSH Terms

Animals
Antibodies
Apoptosis
Blotting, Western
Bone Diseases
Bone Diseases, Metabolic
Caspase 3
Caspase 8
Cell Line
Cell Survival
Cyclosporine
Free Radicals
Osteoblasts
Oxygen
Rats
Reactive Oxygen Species
Antibodies
Caspase 3
Caspase 8
Cyclosporine
Free Radicals
Oxygen
Reactive Oxygen Species