Figure 2. Pro-inflammatory cytokine levels in aged and young rat forelimb flexor digitorum tendons.

(A–D) IL1-β, TNF-α, IL-6 and IL-10 in aged rats’ preferred reach limb and support limb tendons. (E–H) IL1-β, TNF-α, IL-6 and IL-10 in young adult rat tendons. *: p<0.05 and **: p<0.01, compared to aged-matched NC rats; ##:p<0.01 compared to support limb of same-aged 12 week HRLF rats: &: p<0.05 and &&: p<0.01, compared to same week and limb of other age group.