Contrary to popular belief, the breakdown of cartilage is not always the most important factor in arthritis. — TNS
A Louisville, Colorado, company in the United States is studying whether cells taken from patients’ fat could reduce knee pain and improve motion in people with arthritis.
GID BIO is conducting a phase 3 trial of a process that extracts fat from the patient, uses a chemical reaction to isolate cells believed to have regenerative properties and injects them into the patient’s knee.
Phase 3 trials typically follow hundreds or thousands of volunteers over at least one year to determine whether a treatment is effective and clarify what side effects it can cause, according to the US Food and Drug Administration (FDA).
While fat tissue may not appear interesting at first sight, it includes several types of cells, including ones that help rebuild connective tissue and blood vessels, GID BIO chief executive officer William Cimino said.
Those same cell types are available elsewhere in the body, but they are highly concentrated in fat and most people don’t mind giving up a bit of that particular tissue, he said.
Studying cell-based therapies in arthritis is difficult because people tend to report significant relief from placebos, creating a challenge in sorting out whether they experienced relief from the treatment because they thought they would, said University of Connecticut's Cato T. Laurencin Institute chief executive officer Dr Cato Laurencin, who studies fat-derived therapies, but isn’t affiliated with the GID BIO trial.
That said, studies taking different approaches have shown indications that some of the chemicals produced in fat can help with tissue regeneration, according to him.
“There is absolutely tremendous potential,” he said.
People think of the breakdown of cartilage – the cushion between bones – as what’s causing their arthritis, but that’s often not the most important factor as bone and connective tissue also break down, said Cimino.
Cartilage can’t regenerate, but the bones themselves and the tendons holding them together can, he said.
Patients wouldn’t see any difference in images of their knees after the injections, but have reported reduced pain and better functioning in the smaller studies before the current trial, according to Cimino.
“This is unquestionably a cellular-level repair,” he said. – By Meg Wingerter/The Denver Post/Tribune News Service
