Identification of cell proliferation zones, progenitor cells and a potential stem cell niche in the intervertebral disc region: a study in four species.

Study Design.Descriptive experimental study in 4 different mammals.Objective.To investigate cell proliferation/regeneration and localize stem cells/progenitor cells within the intervertebral disc (IVD).Summary of Background Data.Disc degeneration (DD) is believed to play a major role in patients wit