B Cell Retention After Injection Into Infarcted Rat Myocardial Tissue
Immunohistochemical detection of CD45RA-positive cells within the border zone of rat infarcted myocardium 2 weeks after transplantation of saline control cells (A), B cells (B), cultured B cells (C), and B cells cocultured with nonhematopoietic stem cell (D). Tissue sections were stained with rat-specific antibody against CD45RA and visualized using 3, 3'-diaminobenzidine in which all positive cells are stained brown (arrows). All nuclei were stained with hematoxylin. Instrument magnification 400×. Scale bars are 50 μm.