Degenerative Disc Disease Support Group
Degeneration of the intervertebral disc, which is often called "degenerative disc disease" (DDD) of the spine, DDD is in fact a condition that can be painful and can greatly affect the quality of one's life. While disc degeneration is not a normal part of aging and for most people is not a problem, for certain individuals a degenerated disc can cause severe constant...

If you have long term lower back pain due to DDD then you should consider becoming part of the trial.
Here's some info -
http://www.articlesbase.com/diseases-and-conditions-articles/there-may-be-a-cure-for-back-pain-its-name-is-rhgdf-5-3183258.html
What doctor did your injections? PM, Ortho, Neuro? How did you become a part of the clinical trial? Were you approached?
I'm thinking about bringing some info on this to my next PM appointment. It would give so many hope if this is works.
Take care of the DDD before all the damage is done & nerve pain or damage enters the picture.
Some hope is better then none.
Sammy
I became part of the trial because my surgeon (ortho) is operating one of the trial sites. Anyone wanting to participate should contact a trial site on the list - http://clinicaltrials.gov/ct2/show/NCT01124006. They are scattered throughout the US.
http://clinicaltrials.gov/ct2/show/NCT01124006