Objective To investigate the potential of chronic myeloid leukemia ( CML) cell line KCL22 in indu-cing leukemia in NOD-SCID mice for setting up a basis for constructing a CML mouse transplantation tumor model. Methods 2 ×107 KCL22 cells in logarithmic growth phase were injected via the tail vein into experimental NOD-SCID mice whereas PBS was injected to the mice of control group.General condition of the mice of both groups was observed.Wright staining was used to observe the changes of blood and bone marrow smears.PCR was conducted to detect the transcription level of BCR-ABL, and histology with HE staining was used to evaluate the tumor cell invasion in the liver and spleen. Results Four weeks after the injection of KCL22 cells, the mice in experimental group showed physical signs of decreased reactivity, depression, swollen hindlimb muscles and petechia on the hindlimb femur.Peripheral white blood cells ( WBC) began to increase after 5 weeks, with a significantly increased quantity compared with the control group (P<0.05).Imma-ture granulocytes could be seen in blood and bone marrow smears, and tumor cell infiltration was found in the liver and spleen.BCR-ABL was highly expressed in bone marrow cells.Survival time of the experimental mice without therapy was 70 days, significantly shorter than that in the control group ( >90 days) (P<0.05).Conclusions A NOD-SCID mouse model of CML transplantation tumor is successfully established with leukemia KCL22 cells.

Objective To construct BCR-ABL SH3-T79Y mutant recombinant adenovirus vectors and investigate its effects on apoptosis of K562/G01 cells.Methods SH3-T79Y mutant was amplified by overlapping PCR with pMig210 as template and cloned into recombinant adenovirus vectors .After identifying , packaging and amplifying , the recombinant adenovirus vectors containing SH 3-T79Y mutant was collected .Recombinant adenovirus vectors were transferred into K562/G01 cells.Then transfection efficiency was determinated , changes of cell morphology were observed by Wright 's staining , cell apoptosis was evaluated by flow cytometry , BCR-ABL and CrkL phospho-rylation was detected by Western blot .Results The vectors were successfully constructed .Transfection efficiency was more than 80%after transferring into K562/G01 cells for 72 h;there was obvious apoptosis phenomenon , cell apoptosis significantly increased to 32.46% compared with the control groups ( P<0.05 ) , BCR-ABL and CrkL phosphorylation significantly decreased and so did the expression of BCR-ABL( P<0.05 ) .Conclusions Success-fully constructed the SH 3-T79 Y mutant recombinant adenovirus vectors and it may promote the apoptosis of K 562/G01 cells by inhibiting BCR-ABL and CrkL phosphorylation .

【Objective】 To conduct a retrospective analysis of HIV Ag-Ab detection by ELISA in our blood center, so as to provide reference for continuous improvement. 【Methods】 The reactive rate of HIV by each reagent, reactive rate of both reagents, re-test rate, concordance rate of initial-repeat test, and reagent utilization rate were counted, and the external quality assessment results were analyzed by PT score and z-ratio. 【Results】 The total reactive rate of HIV was 0.15%. The reactive rate by both reagents was 0.02%. The re-test rates, reactive rates, concordance rates and reagent utilization rates of the two reagents were 0.09% vs 0.08%, 0.07% vs 0.06%, 75.86% vs 78.21%, and 114.54% vs 113.92%, respectively. PT score was 100%, and z-ratio of 7 negative samples and 1 positive sample was less than 2, and of 2 positive samples was more than 3. 【Conclusion】 The laboratory quality monitoring indicators and external quality assessment can effectively monitor the operation of blood testing laboratory.