Cytosine deaminase (CD) gene is a kind of suicide gene, cytosine deaminase can catalyze the conversion from 5 - fluorocytosine (5 - FC) into 5 - fluorouracil (5 - FU), this combination therapy (CDgene/5 - FC) were widely used in cancer therapy. The results of many researches in different cancer cells have demonstrated that it can inhibit tumor growth significantly. The mechanism includes 5 - FU's direct killing tumor cells and its bystander effect. It can also be used as a potential purging method for autologous hematopoietic cells transplantion after chemotherapy in breast cancer patients. CD/5 - FC combined with other therapies would be an important future research approach.

Objective To investigate the nurses′ styles of handling interpersonal conflict and jobachievements,and analyze the relationships between them.Methods A total of 610 nurses in four hospitals were recruited by convenience sampling method and investigated with general state scale,the Rahim Organitional Conflict Inventory- Ⅱ and the Job Performance Appraisal Scale for nurses in four hospitals,the results underwent analysis.Results The factor scores of the Rahim Organitional Conflict Inventory- Ⅱwere sent in the descending order as integrating,avoiding,obliging and dominating.The factor scores of jobachievements were sent in the descending order as task,situation,anti-product.Integrating was positively correlated with task and situation,negatively correlated with anti-product,obliging was negatively correlated with task,positively correlated with anti-product.Conclusions Integrating styles of handling interpersonal conflict benefits to accomplish nurses′ job achievement.

AIM: To study the effects of VEGF over-expressed C6 glioma cells on the expression of Flk-1 and Flt-1 in cocultured microvascular endothelial cells using the rat hepatic cells BRL 3A as control. METHODS: Cocultured systems of rat pulmonary microvascular endothelial cells with C6 and endothelial cells with BRL 3A were established. Immunocytochemical method was used to investigate the expression change of Flk-1 and Flt-1 protein in cocultured microvascular endothelial cells. The expression of Flt-1 and Flk-1 mRNA was analyzed by RT-PCR and Northern blot. RESULTS: The microvascular endothelial cells cocultured with C6 showed increased expression of Flk-1 and Flt-1 protein ( P

AIM To study comparision of water-soluble components in Danshen from different sources. METHODS To be determined by HPLC, the eluent consisted of methanol (1 % acetic acid)-water (1 % acetic acid). A gradient method was set up. The detection wavelength was set at 280 nm. RESULTS The average recovery of four components were all above 97 % , RSD was no more than 2.0 % . The calibration curve was linear. CONCLUSION The method is accurate and reliable with good reproducibility.

This paper introduces a kind of vacuumizing system for X-ray machine head.The system function,structural composition and operation principle are expounded.It has such advantages as small empty volume,high vacuumizing speed,simple and convenient structure,etc.It shows high military,social and economic benefit because of its good maneuverability in timely and efficient maintenance on the spot.According to the feedback from maintenance department of field and local medical equipment,it is stable and reliable in working,easy to be operated and worthy of being popularized.

Objective To evaluate the safety and efficacy of haploidentical hematopoietic stem cell transplan-tation(haplo-HSCT)treatment in children with hematological diseases.Methods Fifty-nine cases of less than 14 years old children with hematonosis were analyzed retrospectively,who were enrolled in the Aerospace Central Hospital from July 2012 to June 2016.And the evaluation was carried out by analyzing the success rate of implantation,occu-rrence rate of graft versus host disease(GVHD),infection rate and transplant related mortality(TRM),cumulative re-currence rate,overall survival rate(OS)and disease-free survival rate(DFS).Results In total of 59 cases,the 59 engraftments were successfully transplanted,the median time of leukocyte engraftment was 18(8-23)days,the median time of platelet engraftment was 21(11-68)days,the bone marrow was assessed 28 days after transplanta-tion,which showed that 59 patients achieved complete remission(CR)and DNA test confirmed complete donor chime-rism.With a median of follow-up time of 19(5-56)months,the cumulative recurrence rates ofⅠ,Ⅱgrade andⅢ,Ⅳ grade acute GVHD were(38.3 ± 6.3)%(23 cases)and(16.7 ± 4.8)%(10 cases),respectively,the chronic GVHD cumulative recurrence rate was(65.6 ± 7.5)%(30 cases),the cytomegalovirus(CMV)viremia cumulative recurrence rate was(45.1 ± 6.5)%(27 cases),the Epstein-Barr virus(EBV)viremia cumulative recurrence rate was(10.0 ± 3.9)%(6 cases),the viral cystitis cumulative recurrence rate was(20.0 ± 5.5)%(12 cases),the transplant related mortality was(12.8 ± 6.0)%,the 2-year cumulative recurrence rate of CR group was(8.0 ± 5.4)%,and that of non-remission(NR)group was(64.1 ± 11.9)%.The 2-year OS of CR group was(78.9 ± 7.5)%,the 2-year OS of NR group was(32.5 ± 12.9)%,the 2-year DFS of CR group was(79.5 ± 9.8)%,the 2 years DFS of NR group was(27.4 ± 7.9)%.Conclusions Haplo-HSCT is safe and effective in treating children with hematonosis,and haplo-HSCT has high survival rate and low recurrent,especially when transplantation is per-formed in the remission stage.But the prognosis of haplo-HSCT is poor in the refractory and relapsed patients,and to explore the preventing recurrence measures are very urgent.

Objective To explore the safety and efficacy of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in refractory or relapsed leukemia patients undergoing total body irradiation and FLAG regimen consisting of fludarabine,cytarabine,granulocyte colony stimulating factor (TBI/FLAG).Methods Forty-seven cases of refractory or relapsed leukemia treated in our hospital between May 2012 and December 2015 were analyzed retrospectively,including 14 cases of acute lymphoblastic leukemia,31 cases of acute myeloid leukemia,2 cases of acute transformation of chronic myelocytic leukemia.All patients did not achieve remission before bone marrow transplantation.The proportion of blast cells was 10％-98％.The TBI/FLAG was the main conditioning regimen.Kaplan-meier curve was used to analyze the cumulative incidence of GVHD,cumulative recurrence rate,overall survival rate (OS) and disease-free survival rate (DFS).Results Of 47 cases,there was only one patient with infection during the preconditioning and the cell engraftment was not successful,and the rest 46 patients were successfully engrafted.The median time of leukocyte engraftment was 17 (11-25) days,and the median time of platelet engraftment was 21 (11-70) days.The cumulative incidence of acute GVHD was (62.3 ± 7.3)％,including 51.1％ and 28.4％ in Ⅱ and Ⅲ-Ⅳ grade respectively.Twenty-four patients suffered chronic GVHD in 44 assessable patients,and the cumulative incidence was (77.1 ± 11.2)％.The bone marrow was assessed 28 days after transplantation,and the results showed that 46 patients achieved complete remission,and DNA test confirmed complete donor chimerism.The median follow-up time was 12 (1-44) months,25 patients survived (53.19％,25/47),and 13 relapsed (27.65％,13/47).The 1-yearOS and DFS was 47.9％ and 45.5％ after transplantation.Conclusion TBI/FLAG-based regimen is safe and effective for refractory or relapsed leukemia,and the major risk still is relapse for refractory or relapsed leukemia patients after transplantation.The method of preventing recurrence needs to be further explored.

Objective:To investigate the efficacy of allogeneic hematopoietic stem cell transplantation for acute myeloid leukemia associated with 11q23/MLL.Methods:Retrospection and analysis 50 cases of acute myeloid leukemia with 11q23/MLL and who were treated with allogeneic hematopoietic stem cell transplantation(allo-HSCT)in our hospital from September 2012 to December 2019. The efficacy was evaluated by analyzing the transplantation success rate, graft-versus-host disease rate, infection rate, transplant-related mortality(TRM), accumulative recurrence rate, disease-free survival rate(DFS), and overall survival rate(OS).Results:Except for 1 patient had an unsuccessful stem cell transplantationas the result of multiple organ failure, the remaining 49 patients were successfully transplanted. The median time of leukocyte transplantation was 15(9~18)days, and the median time of platelet transplantation was 13(8~33)days. Bone marrow was assessed 28 days after transplantation, and 49 patients were in CR status. The median follow-up time was 38(3~79)months. Between remission group and non-remission group after transplantation, the 3-year OS rates were(83.3±10.8)%, (30.9+ 8.2)%( P=0.002)and the 3-year DFS rates were(83.3+ 10.8)%, (28.4±8.0)%( P=0.003), respectively. Conclusions:Allogeneic hematopoietic stem cell transplantation is an effective method for the treatment of 11q23/MLL rearranged AML. Patients in remission before transplantation have a higher survival rate, and recurrence after transplantation is the primary problem currently faced.

Objective To investigate the clinical efficacy of pretreatment regimen containing idarubicin (IDA) in allogeneic hematopoietic stem cell transplantation (allo-HSCT) for high-risk refractory leukemia. Methods A total of 116 patients with high-risk refractory leukemia who received allo-HSCT treated with 7 types of IDA-containing pretreatment regimes were enrolled in this study. The implantation rate of 116 recipients was summed up. The 2-year overall survival (OS), 2-year disease free survival (DFS), cumulative recurrence rate, recurrent mortality, transplantation related mortality (TRM), cumulative incidence of acute graft-versus-host disease (aGVHD) and chronic graft-versus-host disease (cGVHD) were statistically analyzed by Kaplan-Meier survival curve. Results All 116 recipients successfully implanted. The median follow-up time was 28 (7-70) months. Among them, 64 recipients survived, the 2-year OS was 55.2%, 2-year DFS was 51.7%, 2-year recurrent mortality was 23.3% and 2-year TRM was 18.1%. Among 116 recipients, 72 cases suffered from aGVHD. The 2-year cumulative incidence rate of aGVHD was 62.1% including 20 cases of grade Ⅲ-Ⅳ aGVHD, the 2-year cumulative incidence rate was 17.2%. Among 116 recipients, 59 cases presented with cGVHD. The 2-year cumulative incidence rate was 55.4%, of which the 2-year cumulative incidence rate of extensive cGVHD was 14.7%. Among 116 recipients, 30 cases recurred with a 2-year cumulative recurrence rate of 25.9%. Conclusions IDA-containingpretreatment regime has high safety and effectiveness, and can be used as an effective pretreatment regime for transplantation preprocessing in patients with high-risk refractory leukemia.

Objective: To investigate the efficacy of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in the treatment of leukemia patients also suffering from central nervous system leukemia (CNSL) . Methods: A total of 48 leukemia patients with central nervous system leukemia admitted to our hospital from May 2012 to December 2017 were retrospectively analyzed. Results: ① Including 22 cases of acute lymphocytic leukemia (ALL) , 21 cases of acute myeloid leukemia (AML) , and 5 cases of chronic myelogenous leukemia (CML) . Before transplantation, 19 patients achieved complete remission (CR) , and the rest 29 ones without remission. ②The conditioning regimen used TBI as the main protocol, and 6 patients were combined with whole brain and total spinal cord radiotherapy, 2 with Cyber knife treatment, and children with modified IDA combined with BUCY. ③All 48 patients were successfully transplanted, the median time for leukocyte engraftment was 14 (10-23) days, the median time for platelet transplant 16 (6-78) days. ④Bone marrow was evaluated 28 days after transplantation, all 48 patients reached CR, and DNA testing confirmed that they were all full donor chimerism. ⑤The median follow-up was 14 (2-69) months. Of them, 28 cases survived, 10 relapsed and the rest 3 had recurrence of CNSL after transplantation. One year after allo-HSCT, the overall survival (OS) of CR and non-CR groups were (77.3±10.0) % and (57.6±9.3) % (P=0.409) , respectively, the disease-free survival rates (DFS) were (71.2±11.0) % and (53.9±9.5) % (P=0.386) , respectively. The 1-year OS rates of ALL and AML groups after transplantation were (54.2±10.7) %, (80.1±8.9) %, respectively (P=0.200) , and DFS rates were (49.2±10.8) %, (75.0±9.7) % (P=0.190) , respectively. Conclusion Allo-HSCT was safe and effective for leukemia patients with CNSL.