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Special ArticleOpen Access
Free Radicals in Primary Knee Osteoarthritis
Free radicals have an important role in the pathogenesis of knee osteoarthritis. Reactive oxygen
species (ROS) produced by abnormal chondrocyte metabolism exceeds the physiological buffering capacity
and results in oxidative stress. The excessive production of ROS can damage proteins, lipids, nucleic acids,
and matrix components. They also serve as important intracellular signaling molecules that amplify the
inflammatory response. An understanding of oxidative stress involved in this disease might allow the use of
antioxidant therapies in the prevention and/or treatment of knee osteoarthritis.
Keywords: Osteoarthritis, Free radicals, Reactive oxygen species, Chondrocytes
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