Objective To evaluate the feasibility of interstitial implantation of ~(125)I seeds for malignant tumor at the Head and Neck. Methods From Oct 2006 to Oct 2008,26 patients received interstitial implantation of ~(125)I seeds in our hospital because of recurrent or metastatic malignant tumors at the head or neck after surgery or chemotherapy. ~(125)I seeds were implanted into the tumor tissues under guidance of CT. Results The operation was completed in all the patients. A median of 23 seeds (12～54) were implanted in each case. No complications, such as hemorrhage, infection, or seed migration, occurred in the patients. The patients were followed up for 3～24 months. During the period,the rate of local control was 54% (15/28) at 3 months,72% (18/25)at 6 months,47% (11/23)at 12 months,and 37% (6/16)at 2 years. Conclusion Interstitial implantation of '2!I seeds is feasible for ecurrent or metastatic tumor at the head or neck with a good short - term outcome.

The effects of thy rotropin-releasing hormone (TRH) on survival time, hemodynamics, acid-base balance and subcellular structure of liver cells in canine severe hemorrhagic shock were studied. The results showed that: (1) TRH significantly elevated and maintained mean arterial pressure (MAP) of dogs during shock (MAP was 13.99 ? 0.62 kPa at 4 h after treatment vs 5.09? 105 kPa in control); (2) TRH significantly prolonged the survival time of dogs (alive/total = 4/5 vs 1/5); (3) TRH effectively maintained acid-base balance; and (4) TRH maintained the integrity of subcellular structure of the liver cells. These results suggest that TRH may reverse severe hemorrhagic shock.

Objective: To study retrovirus (RV)-mediated transduction of gastric carcinoma cells with the herpes simplex virus thymidine kinase (HSV-tk) gene and the subsequent treatment with ganciclovir(GCV). Methods: The TK gene was transfected into human gastric carcinoma cell line MKN28 using HSV-TK that packed with PA317 cell, the sensitivity of MKN28TK cells to GCV was examined in vitro. Results: The retroviral-mediated HSV-TK gene can be transfected to MKN28 cells. The growth rate of MKN28 cells transfected with HSV-TK gene did not change. MKN28TK cells became significantly sensitive to GCV and had bystander effect. Conclusion: Transfection of gastric carcinoma with HSV-TK has higher transfection efficiency. MKN28TK cells are significantly sensitive to GCV.