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. Author manuscript; available in PMC: 2022 Mar 28.
Published in final edited form as: FASEB J. 2021 Dec;35(12):e22066. doi: 10.1096/fj.202101484R

Figure 2.

Figure 2.

The histological staining and semi-quantification of the supraspinatus tendon-to-bone interface in four age groups. (A) The H&E, Masson’s Trichrome (MT), Safranin O (SO), and Picrosirius red (PR) staining of the supraspinatus tendon-to-bone interface with the newborn (N), young (Y), adult (A), old (O) groups. (B) The proportion of collagen’s area. (C) The proportion of metachromasia area. (D) The ratio of thin collagen fibers / thick collagen fibers. (T: tendon; C: cartilage; I: interface; B: bone; scale bar: 50 μm; n = 6, *p < 0.05, **p < 0.01, ***p < 0.001)