Induction of salient genes in cartilage with Grade 1 damage (Cluster I).

CD, genes involved in cell division, proliferation, apoptosis; Inf, cytokines, chemokines and their receptors; Inf2, inflammatory mediators and their receptors, signaling molecules, transcription factors, and regulators; ECM, extracellular matrix proteins; ECM2, Proteases, regulators of ECM synthesis and breakdown; GF, genes for growth factors and their receptors; GF2, growth factor signaling molecules, transcription factors. A full list of these genes is given in Table S1.