Objective To study the regulatory T cells (Treg-cell) frequencies in patients with childhood acute leukemia and evaluate its clinical application value by investigating the relationship between the increasing numbers of Treg cells and minimal residual disease of leukemia (MRD), Methods Foxp3-FITC/CD25-PE/CD4-PerCP/CD3-APC four-color staining flow cytometry was established to identify Treg cells. Treg cells frequencies both in 10 healthy controls and in 33 patients with newly diagnosed childhood acute leukemia ( B-ALL 17 cases, T-ALL 9 cases, AML 7 cases) were detected. The possibility of the accumulation of Treg cells being the prognostic marker for acute leukemia was evaluated by comparing the results of Treg cells frequency with that of MRD. Results The percentage of Treg cells in CD+4 CD+3 T cells was M = 8. 09% in normal bone marrows, which was significantly different from the results in the bone marrows of newly diagnosed childhood acute leukemia ( M = 12.77% , U = 3.41, P < 0.01 ), but it showed no significantly differences among B-ALL, T-ALL and AML groups. No association was observed between the expression of Treg cells and clinical-biologic characteristics studied. In addition, Treg cells frequency in MRD positive group was significantly different from that in MRD continuously negative group ( M = 14. 74% vs M=11.3%, t =252.5,P<0.05). Conclusions Consistent with results from solid tumor, the study identifies a significantly increased numbers of Treg cells in patients with childhood acute leukemia. The situation of accumulation of Treg cells is closely associated with MRD results during chnical remission. High level of Treg cells may cause poor prognosis and increase the possibility of relapse.

Objective To investigate the indication,feasibility and clinical effectiveness of stage management of Budd-Chiari syndrome(B-CS). Methods From Feb 2007 to June 2009,32 cases of Budd-Chiari syndrome(9 cases of type Ⅰ,17 cases of type Ⅲa,6 cases of type Ⅲ b)were admitted.Inferior vena cava hypertension(IVCHT)and portal hypertension(PHT)co-existed in all the patients.According to the clinicopathologic classification and hemodynamic compensation,these patients underwent single stage treatment(snrglcal procedure or radioactive intervention)or two-stage management(one.stagesurgical procedure/radioactive intervention plus two-stage surgical procedure/radioactive intervemion).Results Recovery was achieved in all patients without mortality.The main complications were Dleural effusion in 3 cases,acute heart failure in 2 cases and celiac lymphatic leakage in 1 case respectively.which were cured after medical treatment.In 4 months to 2 years follow-up,no recurrent cases were identified and all the patients were in good condition. Condusions Stage management of Budd.Chiari svndrome canalleviate the perioperative risk and clinical effectiveness can be achieved.The hemodynamic compensation is the basis on which stage management is adopted.

Objective To investigate quercetin's protective effect against oxidative stress in and impact on the biological activity of mouse B10BR melanocytes. Methods B10BR cells were cultured and treated with different concentrations of quercetin followed by additional culture. Then, cell viability was measured by using MTT assay, hydrogen peroxide-induced cell apoptosis by flow cytometry, and cell morphological changes by microscopy. The tyrosinase activity in and melanin synthesis by B10BR cells were measured by dopa oxidation assay and sodium hydroxide (NaOH)-lysis method, respectively. Results After treatment with quercetin of 33.33 μmol/L for 24 hours, the survival rate of B10BR cells reached (94.22 ± 3.36)%, tyrosinase activity (107.15 ± 10.96)%, and melanin content (111.85 ± 9.49)%. A significant difference was observed in tyrosinase activity and melanin content between hydrogen peroxide-induced and 33.33 μmol/L quercetin-treated B10BR cells and those only induced by hydrogen peroxide (both P < 0.01). Flow cytometry revealed that quercetin inhibited hydrogen peroxide-induced apoptosis in melanocytes. Conclusion The protective effect of quercetin against hydrogen peroxide-induced apoptosis in melanocytes may provide a new idea for the treatment of vitiligo.

BACKGROUND:The incidence of complications folowing conventional repairing for the ruptured tendon is up to 73%, such as delayed healing, adhesion, secondary rupture. These complications severely affect ankle joint function of the patients. OBJECTIVE:To reduce the complications folowing the repair and investigate the role of hernia repair materials in the repairing of ruptured Achiles tendon. METHODS:Eleven patients who underwent repair of ruptured Achiles tendon were retrospectively studied. Among them there were eight males and three females with the mean age of 42 years (26-58 years). Three cases were injured in left side and eight cases were in right side; four cases were open injury by sickle-induced damage and seven cases were closed injury by exercise-induced damage. The hernia repair materials after pruning was applied with a “wrap” method to strengthen the anastomosis repair of Achiles tendon after the conventional repair surgery had been completed. At the time of folow-up, al patients were observed for postoperative local appearance and function recovery, and assessed with Arner Lindholm standards. RESULTS AND CONCLUSION:The folow-up interval was 6-45 months (average 24.5 months). Two cases were lost to folow-up. According to the Arner Lindholm standards, the effects were excelent in seven cases (78%) and good in two cases (22%). Local appearance and function recovered wel postoperatively, and no complications occurred such as wound infection, secondary rupture and so on. A “wrap” method with hernia repair materials is suggested to strengthen the anastomosis repair of ruptured Achiles tendon after the conventional repair surgery is completed, it can significantly promote the healing of Achiles tendon ruptured end anastomosis, prevent Achiles tendon recurrent ruptures, local adhesion and infection.

Objective To investigate the change of and relationship between astrocytes and synapse structure in the region around the infarction area and the roles of the astrocytes on the recovery of motor skill in the experimental rats with acute cerebral infarction after mobility training. Methods A total of 120 rats were randomly divided into 4 groups: a rehabilitation group, an inhibition group, a saline group and a control group. The motor skill of the rats was examined by beam walking test. The changes of astrocytes, synapses, the glial fibrillary acidic protein (GFAP), synaptophysin and growth associated protein 43(GAP-43) in the region around the infarction were observed using electron microscope and immunohistochemistry staining at 7,21 and 42 d after the model was made. Results It was noted that the recovery of motor skill was more significant in the rehabilitation group than that in the control and the inhibition groups (scored in beam walking test at 3.2?0.3 vs 1.8?0.5 and 1.6?0.9 at the third weekend; scored 5.8?0.9 vs 2.6?0.8 and 2.1?0.7scores at the sixth weekend. P

Objective To compare the effects of three kinds of Oncomelania hupensis RNA extraction methods,namely a modified SDS method,TRIzol reagent method,and CTAB method,so as to obtain an economical and efficient method for RNA extraction from O. hupensis. Methods The modified SDS method,TRIzol reagent method and CTAB method were applied to ex-tract the RNA from O. hupensis. A nucleic acid protein analyzer was used to measure the concentration and purity of RNA. The yields were calculated by the concentration of the products. The purity was indicated by A260/A280 and A260/A230. The quality of RNA was inspected by 1% agarose gel electrophoresis. The β-acting gene was selected as the target gene for RT-PCR analysis. Re-sults The RNA yields obtained by using the three kinds of extraction methods were significantly different(F = 16895.85,P <0.01)according to the analysis of variance. The LSD test showed that the yields obtained by using the modified SDS method were the highest,and those obtained by the CTAB method were the lowest. The purity of RNA extracted by the CTAB method was su-perior to that by the other two methods,and the A260/A280 and A260/A230 ratios of the CTAB method were in the range from 1.8-2.0 and 2.0-2.2. The A260/A230 ratios of the other two methods were both lower than 2.0. The RNA extracted by the modified SDS meth-od had the better integrity. The electrophoresis results showed that the 28S rRNA band,18S rRNA band and 5S rRNA band were clear,and there was no obvious smear between each band. The RNA obtained by the TRIzol reagent method had no 28S rRNA band,and that obtained by the CTAB method had no 28S rRNA and 5S rRNA bands. The β-acting gene of the RNA ex-tracted by all the three methods could be amplified by RT-PCR. The costs and time-consuming of the modified SDS method were less than those of the other two methods. Conclusion The modified SDS method is an economic and efficient method,and it is suitable for extracting the RNA of O. hupensis,especially for large sample preparation.

Combining the two novelty search work workshops with recent published papers on novelty search in Universities and Colleges,new progresses for science & technology (ST) novelty search in Universities and Colleges have been comprehensive summarized,and some enlightenments have been probed into seminar:a new novelty search experience communication mode and fast development of college ST novelty search work to ST novelty search and innovation.

Objective To analyze risk factors for diabetic kidney disease (DKD) in inpatients with type 2 diabetes.Methods A total of 930 inpatients with type 2 diabetes were enrolled in the study and grouped according to different levels of estimated glomerular filtration rate (eGFR),albuminuria,and diabetic retinopathy.Logistic regression analysis was adopted to explore the risk factors for DKD in inpatients with type 2 diabetes.Results (1) The prevalence of albuminuria in patients with type 2 diabetes mellitus was increased with declining eGFR (P ＜ 0.05).(2) The prevalences of DKD and non-diabetic renal disease (NDRD) in patients with type 2 diabetes mellitus were 22.26％ and 8.92％,respectively.Compared with patients with NDRD,patients with DKD had longer diabetic duration,higher levels of systolic blood pressure,serum creatinine,and urinary albumin excretion,and lower levels of hemoglobin[(125.40 ± 21.95 vs 138.18 ± 19.67) g/L],serum albumin[(37.45 ± 5.54 vs 40.55 ± 3.55) g/L],and eGFR[(89.66 (59.10-108.25) vs 103.15 (85.39-114.88) ml · min-1 · (1.73 m2)-1,all P＜0.05].(3) Logistic regression analysis showed that age,diabetic duration,systolic blood pressure,serum uric acid,diabetic retinopathy,and hypertension are the independent risk factors for diabetic kidney disease in inpatients with type 2 diabetes,while serum albumin was the protective factor (all P＜0.01).Conclusions A variety of clinic risk factors were associated with DKD.Better control of blood pressure,serum uric acid,and hypoalbuminemia should be performed to delay the progress of DKD.

Objective To develop a special ambulance for airfield rescue of pilots in danger or offering medical care for pilots in flight.Of course the ambulance can also be used to rescue the wounded daily or in the war.Methods The ambulance owned a cross-country motorcar chassis and bearing carriage.A luffing extension-jib was installed on top of the carriage with a telescopic nacelle.The medical carriage owned a generator,air-conditioner,launder & antisepsis facilities,telescopic medical table,Air Force medical facilities for first aid and so on.It could simultaneously treat 2 injured pilots in lying position.Oxygen outputs were equipped to sustain Persons in carriage.Result The maximal speed of the ambulance was 95 km/h.The time of simulated rescue was about 3 minutes in the maxium height.Conclusion Without new staff established,the ambulance can adapt to any road and is suitable to war field.It can arrive at the location of flight accident quickly and rescue the pilot rapidly.It meets the needs of medical support in flight,war-time medical care in airport and mobile accompanying support.

Objective To investigate the incidence of prozone phenomenon of rapid plasma reagin (RPR) test in syphilis serolog-ic testing and its correlation with the intensity of chemiluminescent microparticle immunoassay (CMIA) results.Methods A total of 101493 patients in our hospital from January 2014 to December 2015 were performed syphilis serologic testing by CMIA ,RPR and treponema pallidum particle agglutination (TPPA).The incidence rate of prozone phenomenon in RPR testing was evaluated.Its in-fluencing factors were investigated by using the Logistic regression.Results Among 101493 serum samples ,2180 cases were posi-tive by CMIA and 767 cases were positive by RPR ,the incidence rate of prozone phenomenon was 3.3% (26/767)in RPR.The Lo-gistic regression results indicated that the incidence of prozone phenomenon was significantly correlated with CMIA S /CO values and RPR titer ,but had no correlation with sex ,age and seasonality.Conclusion Although the incidence of prozone phenomenon is low in syphilis serologic testing ,but it is enough important.The patients with higher S/CO value in CMIA test have a higher inci-dence rate of RPR prozone phenomenon.