Cartilage breakdown in equine osteoarthritis: measurement of keratan sulphate by an ELISA system.

This research investigates the breakdown of cartilage in horses suffering from osteoarthritis by measuring levels of keratan sulphate, a specific biomarker, using an ELISA system.

Objective of the Research

• The study aimed to explore biomarkers for osteoarthritis in horses. In particular, it focused on the degradation of cartilage resulting in the release of sulphated glycosaminoglycans, especially keratan sulphate, into tissue fluids.

Methodology

• The researchers used an ELISA-inhibition technique to measure synovial fluid and serum levels of keratan sulphate. In addition, sulphated glycosaminoglycans were evaluated by a specific dye binding assay.
• The researchers identified the normal joint levels of these substances to form a comparative basis.

Findings

• According to the study, both keratan sulphate and sulphated glycosaminoglycans showed significantly increased levels (P less than 0.001) in the joints of horses with osteoarthritis compared to those with normal joints.
• Besides, high levels of keratan sulphate were found in synovial fluids from joints with infective arthritis, though not statistically significant different from those with osteoarthritis.

Implications

• By measuring the serum/synovial fluid levels of proteoglycan, the degradation of cartilage may be spotted and monitored.
• This method offers potential to devise more effective treatments for osteoarthritis in horses.