Research projects

Cryotherapy and cryoimmunotherapy were performed to 1.5cm femoral tumor that originated from Lewis Lung Cancer cell. Histologically, the area of nonviable tumor was significantly increased in size in cryoimmunotherapy group than cryotherapy group (Average: 88% vs 73%). Our data suggest that cryoimmunotherapy is superior than cryotherapy in local control and the most effective route is local administration. On the other hand, there was no difference in the effectiveness of local control between these three immune checkpoint inhibitors.

Acute rejection after lung transplantation is the main risk factor for the development of bronchiolitis obliterans (BO). Hemoglobin-vesicles (HbV) have been developed for use as artificial oxygen carriers and this can provide anti-inflammatory effects and may serve to limit tissue injury in airway transplant. Here, we tested the ability of HbV to prevent airway rejection. Tracheal grafts from BALB/c or C57BL/6 were transplanted to C57BL/6 recipients. Experimental groups were treated with HbV. Histopathological evaluation of luminal obliteration was blindly reviewed. Immunohistochemistry and real-time RT-PCR analyses were performed. Allografts treated with HbV revealed a reduction of thickening in epithelial and subepithelial airway layers at day 7 in orthotopic trachea transplantation model compared with allografts treated with vehicle. There was also a concordant decrease in CD3+ lymphocytes and macrophages in HbV treated allografts.