Fig. 2From: Increasing transforming growth factor-beta concentrations with age decrease apelin in the rat rotator cuffQuantitative reverse-transcription polymerase chain reaction analysis of apelin and tendon-related gene expression in the rotator cuff. Relative gene expression of Apelin (A) and tendon-related genes Tnmd (B), Col1a1 (C), and Col3a1 (D) in rotator cuff cells extracted from young (12 weeks), adult (24 weeks), and old (48 weeks) rats. Data represent mean ± SE (n = 9). * p < 0.05, among three groupsBack to article page