Objective:To establish a lung cancer model of patient-derived tumor xenografts (PDTX) and to explore the relation-ship between primary cisplatin resistance and ERCC1 and IGFBP5 expression levels. Methods:Lung cancer tissues from 84 patients who underwent surgery were collected and implanted into nude mice. Patient characteristics for the first generation xenografts that were and were not engrafted were compared. Passage 3 xenografts were treated with cisplatin. The expression levels of ERCC1 and IGFBP5 in cisplatin-resistant and cisplatin-sensitive groups were detected using immunohistochemistry assay. Results:The model success rates were 32.14%(27/84) in first-generation xenografts, 88.89%(24/27) in second-generation xenografts, and 95.83%(23/24) in third-gener-ation xenografts. The tumorigenicity of first-generation xenografts was correlated with size, differentiation, clinical stage, and histologi-cal type. PDTX tumors maintain the histological type of parental tumors through serial passage in nude mice. ERCC1 expression level was significantly higher in the cisplatin-resistant group than in the cisplatin-sensitive group, whereas the IGFBP5 expression level was lower in the cisplatin-resistant group than in the cisplatin-sensitive group. Conclusion:Lung cancer PDTX models were successfully es-tablished, and histological characteristics of the primary cancers were retained. Therefore, the models may serve a function in preclini-cal research of lung tumor biology and for exploring the drug resistance mechanism of tumors. The cisplatin resistance of primary lung cancer may be correlated with the expression level of ERCC1 and IGFBP5 in lung carcinoma.

【Objective】 To investigate the effect of sample processing at 56℃ for 30 min on routine examination in Department of Blood Transfusion. 【Methods】 A total of 40 cross matched blood samples submitted by clinical departments of our hospital, were collected, and each sample was equally divided into two. Before and after heating at 56℃ for 30 min, the ABO blood group was detected by manual method and card method (gel card and glass beadle card), antibody titer was detected by coagulant method, and cross-matching was conducted by anti-globulin card method. Chi-square test and Wilcoxon signed rank test were used to compare the differences between the two groups (before and after heating treatment). 【Results】 The blood group detection rates of the experimental group were 100% (40/40), 37.5% (15/40) and 80% (32/40) by manual test tube method, gel card and glass beads card, respectively, P<0.01. The geometric mean of blood antibody titers in the control group and the experimental group were anti-A IgM (14.936, 10.556) and IgG(3.563, 4.489), anti-B IgM (9.849, 10.556) and anti-G (5.039, 4.489)(respectively, P>0.05). The matching rate of two groups of samples, cross-matched with corresponding donor samples, was both 100% (40/40) by coagulant method, and 100% (40/40) vs 25% (10/40) respectively by the antiglobulin card method (P<0.01). The other 30 samples in the experimental group presented weak agglutination in the secondary side. 【Conclusion】 The treatment of virus inactivation at 56℃ for 30 min has little effect on blood group identification by test tube method, antibody titer and cross-matching by coagulant method, and reduceds the occupational exposure of staff in Blood Transfusion Department.