Researchers Study Method to Detect Equine Arthritis Early

Scientists say molecular changes to an in-joint protein layer called lubricin could indicate osteoarthritis development.
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Researchers Study Method to Detect Equine Arthritis Early
Scientists say molecular changes to an in-joint protein layer called lubricin could indicate osteoarthritis development. | Kevin Thompson/The Horse
Wouldn’t it be great to have some hints that your horse’s joints are about to develop osteoarthritis? If we could catch the disease early enough, it might be possible to initiate treatment to prevent it from developing into the performance-limiting condition so many horse owners are all too familiar with.

Swedish researchers are hot on that trail, and new study results suggest that molecular changes in an in-joint protein layer called lubricin, which helps lubricate the joint, might be what we need to look for. So far, these changes seem to be happening only in joints that are osteoarthritic—or on their way to becoming so. And by contrast, healthy joints don’t seem to be showing these kinds of changes at all, the team relayed.

“It’s a very important event that we think we’ve found happening in the early osteoarthritis disease process,” said Eva Skiöldebrand, PhD. Skiöldebrand is a researcher in the Department of Clinical Chemistry and Transfusion Medicine in the Institute of Biomedicine of Sahlgrenska University Hospital in Gothenburg University, and of the Section of Pathology in the Department of Biomedical Sciences and Veterinary Public Health in the Swedish University of Agricultural Sciences in Uppsala.

Lubricin is a glycoprotein that’s present in superficial layers on joint cartilage. Like an oily surface, it lubricates the cartilage and bones involved in the joint. “It’s a very important layer,” Skiöldebrand said. “And when it gets destroyed, the lubrication isn’t as effective anymore, so the load on the joints is more harmful and causes more wear, leading to osteoarthritis

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Passionate about horses and science from the time she was riding her first Shetland Pony in Texas, Christa Lesté-Lasserre writes about scientific research that contributes to a better understanding of all equids. After undergrad studies in science, journalism, and literature, she received a master’s degree in creative writing. Now based in France, she aims to present the most fascinating aspect of equine science: the story it creates. Follow Lesté-Lasserre on Twitter @christalestelas.

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