By Steve Weakley

Scientists have moved a step closer to being able to replace degenerated spinal discs with new ones grown in a laboratory from a patient’s own stem cells.

Spinal discs are soft tissues that cushion the vertebrae and enable our backs to conform and perform the tasks of everyday movement. Over time, the discs can wear out and cause the bones of the spine to rub together and pinch nerves. This disc degeneration is one of the leading causes of back pain.

University of Pennsylvania researchers reported in the journal Science Translational Medicine that they have successfully grown and implanted replacement discs made from the stem cells of goats. The cells were grown in a laboratory in a disc shaped form and then implanted into the necks of goats.

After 8 weeks, MRI’s showed that the replacement discs functioned just as well or better than the goats’ original cervical discs. The implanted discs were left in for 20 weeks and became part of the animals’ own tissue.

Researchers told Medical News Today that this was a major step forward from previous experiments in which they implanted discs into rat tails. Goat discs are more comparable to humans in size, structure and function.