Fig. 5

CD68 immunohistochemical staining results of the adjacent bone marrow lumen in seven different subgroups at various time points following MASI implantation. The specific groups are as follows: A1, B1, B2, C2, and D2 are subgroups subjected to rabbit bone marrow mesenchymal stem cell transplantation; C1 is a subgroup subjected to rabbit ADSC transplantation; and D1 is a subgroup subjected to rat BMSC transplantation. The figure shows the distribution of CD68-positive cells in the adjacent bone marrow lumen. These CD68-positive cells appear brown after DAB staining, which contrasts sharply with the blue colour of haematoxylin-stained nuclei.