By Pat Anson, PNN Editor

An experimental gel shows promise as a treatment for low back pain caused by degenerative disc disease (DDD), according to the results of a small study being presented at the annual meeting of the Society of Interventional Radiology in Boston.

Hydrogels have been used for years to treat DDD, but this is the first time that Hydrafil – an injectable gel developed by ReGelTec – has been tested on humans.

Hydrafil was injected into the discs of 20 people in Colombia with chronic DDD, who had average pain levels of 7.1 on a 10-point pain scale. None of the participants had found more than temporary, mild relief from treatments such as rest, analgesics, physical therapy and back braces.

“We really have no good treatments for degenerative disc disease, aside from conservative care,” said lead investigator Douglas Beall, MD, a medical advisor to ReGelTec and chief of radiology services at Clinical Radiology of Oklahoma.

“Surgery is statistically no more effective than conservative care and can potentially make things worse; nerve ablation is appropriate for only a few patients; and existing hydrogels are inserted through an incision as a soft solid, which can pop out of place if you’re not highly skilled in placing it.”

Because Hydrafil is injectable, it requires no incision and is minimally invasive, although patients are sedated for the procedure. Researchers heat the gel to become a thick liquid and then use a 17-gauge needle to inject it directly into the affected discs, using fluoroscopic imaging to guide them. The gel fills in cracks and tears in the disc, and then hardens, restoring the disc’s structural integrity. The procedure takes about 30 minutes.

This promotional video by ReGelTec demonstrates how Hydrafil works:

Six months after the injection, all 20 participants in the study reported significantly less low back pain, with their pain levels declining to an average of 2.0 on the 10-point pain scale. They also reported significantly better physical function.

“If these findings are confirmed in further research, this procedure may be a very promising treatment for chronic low back pain in those who’ve found insufficient relief from conservative care,” said Beall. “The gel is easy to administer, requires no open surgery, and is an easy procedure for the patient.”

In 2020, Hydrafil received the FDA’s breakthrough device designation, which allows for an expedited review of an experimental product when there is evidence it provides more effective treatment than current options.

ReGelTec is currently recruiting 50 people with DDD in Canada for a new clinical trial of Hydrafil.

Degenerative disc disease is one of the leading causes of chronic low back pain. Healthy discs cushion the spine’s vertebrae, facilitating movement and flexibility. But with activity and normal aging, discs can wear out and cause the bones of the spine to rub together and pinch nerves, causing pain and numbness. By age 60, most people have at least some disc degeneration in their spines.