Key Word(s): 1. HIF-1α; 2. the hypoxia; 3. gastric cancer; 4. ASODN; Presenting Author: WANG XI Corresponding Author: WANG XI Affiliations: Department of Gastroenterology, the First Affiliated Hospital, Harbin Medical University this website Objective: To study the expression and interaction of ΔNp63, p21WAF1 and PCNA in esophageal squamous carcinoma, and to explore their role in occurrence and development of the cancer. Methods: Immunohistochemical method was carried out to

detect the expression of ΔNp63, p21WAF1 and PCNA for 42 patients from endoscopic mucosa biopsies. The 42 cases included the esophageal cancer, adjacent cancer and far cancer tissues. Results: The positive incidence of ΔNp63 and PCNA was 78.6% and 100% in the esophageal cancer tissues, 52.4% and 59.5% in the adjacent cancer tissues, 26.2% and 31.0% in far cancer tissues, respectively. The positive incidence of p21WAF1 was 54.8% in the esophageal cancer tissues, 76.2% in the adjacent cancer tissues and 90.5% in far cancer tissues. There was positive correlation between and PCNA expression in the esophageal cancer tissue. Conclusion: The expression of ΔNp63 and PCNA was high in the cancer tissues, and higher with decreasing of cancer differentiation. However, the expression of p21 was low in the

cancer tissues, and lower with decreasing of cancer differentiation. click here There was negative correlation between p21 expression and ΔNp63/PCNA expression in esophageal Clomifene cancer. The overexpression of ΔNp63 in esophageal cancer may not only exist in the invasive stage but also play an important role in the early stage of esophageal carcinoma. Key Word(s): 1. esophageal cancer; 2. ΔNp63; 3. p21WAF1; 4. PCNA; Presenting

Author: MAZHI BIN Corresponding Author: MAZHI BIN Affiliations: The First Affiliated Hospital of Harbin Medical University Objective: To study the impact of the apoptosis of the human gastrointestinal carcinoma cells induced by arsenic trioxide, and the changes of Survivin, BCL-2 expression after the chemotherapy with it. Methods: To select 20 Patients diagnosed gastrointestinal carcinoma through endoscopy and biopsy, including 9 gastric cancer and 11 colorectal cancer, and hold malignant tissue of them by endoscopy and biospy. They were given As2O3 intravenous administration (10 mg/d) for three days before operated. After that, all the patients received Surgery. Take pathologies in the preoperative and intraoperative, we observed the cytological morphology, and calculated the apoptosis index(AI) under the light microscope, and detected the positive expression rate of the Survivin, BCL-2 with immunohistochemical method. Results: Apoptosis of post-chemotherapy gastrointestinal cancer cells are 17.04%, more significant than pre-chemotherapy 6.07%,the difference is significant statistic- allly(P < 0.