Multiagent chemotherapy has significantly improved survival for childhood ALL.However,the relapse rate with current therapies remains at 20% to 30%.Numerous studies have proved that the minimal residual disease(MRD)is associated with relapse rate.The major methods for the detection of MRD include polymerase chain reaction(PCR)and flow cytometry(FCM).The measurement of MRD in childhood acute lymphoblastic leukemia offers the promise of individualized,risk-stratified treatment and the prediction for post-transplant outcome.

BACKGROUND: Numerous evidence has demonstrated that the magnesium aloy with excelent mechanical properties can degradein vivo, and can be used as vascular stent materials, bone fixation materials, porous materials for bone repair. But it is not reported in the biliary stent. OBJECTIVE:To observe the degradation procedures and evaluate the changes of mechanical characteristics of biliary stents made of magnesium aloy (AZ 31B) in human bilein vitro. METHODS:The baloon-expandable biliary stents were made of magnesium aloy with laser sculpture. Then, 15 stents treated with micro-arc oxidation on the surface served as experimental group and another 15 stents without micro-arc oxidation as control group. A dynamic numerical simulation system was establishedin vitro to simulate the internal environment of human biliary tract. Al of the biliary stents were placed into this system. Their shapes were observed, and their qualities and radical forces were measured every 20 days. At the same time, their surfaces were scanned by scanning electron microscope. RESULTS AND CONCLUSION:(1) The degradation speeds of the stents in the experimental group were obviously slower than those in the control group. The fracture of the connecting rods in control group and experimental group appeared 20 days and 40 days later, respectively. The peak time of degradation in the control group and experimental group were 30 days and 50 days, respectively. The stents were fuly biodegraded within 70 days in the control group while within 90 days in the experimental group. With time, the stent surface became more rough, and the density, area and depth of etch pits were al increased in the two groups. At the same stage, the degradation speed of the control group was more rapid than that in the experimental group. (2) The qualities and radical forces of the stents were gradualy reduced with time in both groups. However, the degradation speed of stents in the experimental group was much slower than that in the control group. In summary, the degradation speed of the biliary stents made of magnesium aloy treated with micro-arc oxidation is appropriate and can meet the clinical requirement for the degradation time of biliary stents. This novel material could potentialy be used for the preparation of biliary stents.

Objective To explore the effects of Compound Antler capsule on the NO secretion of macrophages, cell cycle and[Ca2 +]i of mouse T lymphocytes.Methods ICR mice were randomly divided into 4 groups:experimental groups were respectively given Compound Antler capsule 233, 467, 1400 mg/kg via intragastric administration once a day and the control group were given the same volume of water for 30 days.NO concentration of mouse peritoneal macrophages was measured by Griess assay.The cell cycle distribution of activated mouse spleen lymphocytes was measured by flow cytometry.Fluorescent probe Fluo 4-AM was used to mark Ca2 + in lymphocytes, and the changes of its fluorescence intensity were observed with the multiscan spectrum.Results The result showed that NO concentration in experimental groups was higher than that in control group (P<0.01).More activated spleen lymphocytes of 467, 1400 mg/kg dose groups were entried into S and G2/M phase than control group (P<0.05).After activated by ConA for 8 min, the intracellular[Ca2 +]i in mouse spleen lymphocytes of 233, 1400 mg/kg dose group was higher than that of control group, respectively (P<0.05).After activated by LPS for 1, 4, 8 min, the[Ca2 +]iin mouse spleen lymphocytes of 233 mg/kg dose group was higher than that of control group, especially at 1 min(P<0.01).Conclusion Compound Antler capsule can improve NO secretion of macrophages and facilitate the entry of mouse spleen lymphocytes from the G0/G1 into the S phase.It also can increase the [ Ca2 +] i of activated lymphocytes to promote their proliferation.Thus Compound Antler capsule can improve the immune regulating ability.

Objective To assess the risk factors of intradialytic-hypotension (IDH) among maintaining hemodialysis (MHD) patients and to explore the relation between NT-proBNP and IDH,thus to provide clinical evidence for the prevention and treatment of IDH.Methods A total of 202 MHD patients during March 2009 to May 2009 in our dialysis center were enrolled in the study.Intradialytic blood pressure (BP) was measured during a 3-month period.IDH was defined as an event characterized by a sudden drop in systolic BP more than 20 mm Hg or in mean artery pressure (MAP) more than l0 mm Hg.Logistic regression analysis was used to assess the risk factors of IDH.ROC curve was used to evaluate the diagnostic efficacy of serum NT-proBNP.Results The incidence of IDH was 42.1％.One hundred and seventeen patients with no-IDH (＜1/10 hypotensive events per 3 months) were served as controls.Fifty-five patients with o-IDH (≥ 1/ 10 but ≤1/3 hypotensive events per 3 months) and 30 patients with f-IDH (＞1/3 hypotensive events per 3 months) were identified among 202 patients.Multivariate regression analysis showed that age,gender,ultrafiltration rate,serum NT-proBNP,serum albumin,aortic root dimension (AoRD) were associated with IDH among MHD patients.Serum NT-proBNP was positively correlated with IDH.The area under the ROC curve (AUC) of NT-proBNP was 0.76 (95％ CI 0.69 to 0.83,P＜0.01).The cut-off value of serum NT-proBNP for IDH was 1746.5 ng/L,with a sensitivity of 88.61％ and a specificity of 51.10％.Furthermore,the AUC of NT-proBNP for f-IDH was 0.65 (95％ CI 0.53 to 0.763,P＜0.01).The cut-off value of serum NT-proBNP for f-IDH was 8208.0 ng/L,with a sensitivity of 33.33％ and a specificity of 91.30％.Conclusions Elderly,female,high ultrafiltration rate,high level of serum NT-proBNP,hypoalbuminemia,shorter AoRD are independent risk factors of IDH among MHD patients.Serum NT-proBNP can be used as a predictor of IDH.

Objective Several studies have indicated that miR-15a,miR-15b and miR-16 may be the important regulators of apoptosis.Since attenuate apoptosis could protect myocardium and reduce infarction size,the present study was aimed to find out whether these miRNAs participate in regulating myocardial ischemia reperfusion (I/R) injury.Methods Apoptosis in mice hearts subjected to I/R was detected by TUNEL assay in vivo,while flow cytometry analysis followed by Annexin V/PI double stain in vitro was used to detect apoptosis in cultured cardiomyocytes which were subjected to hypoxia/reoxygenation (H/R).Taqman real-time quantitative PCR was used to confirm whether miR-15a/15b/16 were involved in the regulation of cardiac I/R and H/R.Results Compared to those of the controls,I/R or H/R induced apoptosis of cardiomyocytes was significantly iucreased both in vivo (24.4％ ± 9.4％ vs.2.2％ ± 1.9％,P ＜ 0.01,n =5) and in vitro (14.12％ ±0.92％ vs.2.22％ ± 0.08％).The expression of miR-15a and miR-15b,but not miR-16,was increased in the mice I/R model,and the results were consistent in the H/R model.Conclusions Our data indicate miR-15 and miR-15b are up-regulated in response to cardiac I/R injury,therefore,down-regulation of miR- 15a/b may be a promising strategy to reduce myocardial apoptosis induced by cardiac I/R injury.

Objective To observe the effect of very early intervention with cerebellar fastigial nucleus electrical stimulation and neurodevelopmental treatment on infants of central coordination disturbance(CCD).Methods 86 infants(0～6 months)with central coordination disturbance were divided into intervention group and control group.The intervention group was treated with neurodevelopmental treatment,cerebellar fastigial nucleus(FN)electrical stimulation and family interference.The control group was treated with neurodevelopmental treatment and family interference.The effect of infant was assessment with Gross Motor Function Measure(GMFM)and Gesell Development Test after 3 months treatment.Results The total improved incidence of the intervention group was 95.6%,which was significantly higher than that of the control group(P<0.01).The difference of scores in social,adaptive and motor area improved in the intervention group compared with that of control group(P<0.05).Conclusion Very early intervention with cerebellar fastigial nucleus electrical stimulation can facilitate the development of gross motor,social,adaptive capability of infants with CCD treated with neurodevelopmental therapy.

OBJECTIVE: To investigate the clinical application and efficacy of ¹²⁵Ⅰ radioactive seeds implantation in the treatment of recurrent salivary gland carcinoma after external radiotherapy. METHODS: From July 2004 to July 2016, 43 cases of recurrent salivary gland carcinoma of the neck after external radiotherapy or surgery combined with external radiotherapy were treated. According to the conventional segmentation radiotherapy for head and neck cancer (once a day, 1.8-2.0 Gy each time, 5 days per week), the cumulative radiation dose of the patients in this group was calculated. In the study, 26 patients received 50-60 Gy, 7 patients received less than 50 Gy, 4 patients received 60-70 Gy, and 6 patients received more than 80 Gy (range: 80-120 Gy). The interval between the last external irradiation and local recurrence was 4-204 months, and the median interval was 48 months. Among them, 25 cases were treated with ¹²⁵Ⅰ radioactive seeds implantation only and 18 cases were treated with ¹²⁵Ⅰ radioactive seeds implantation after operation. The prescription dose was 100-140 Gy. The control rate, survival rate and disease-free survival rate were recorded to evaluate the side effects. RESULTS: The median follow-up time was 27 months (ranging from 2.5 to 149.0 months). Among them, the median follow-up time of adenoid cystic carcinoma patients was 31 months (range: 2.5-112.0 months), and the median follow-up time of mucoepidermoid carcinoma patients was 18 months (range: 5-149 months). The local control rates for 1, 3 and 5 years were 66.5%, 48.8% and 42.7%, respectively. The 1-, 3- and 5- year survival rates were 88.0%, 56.7% and 45.8%, respectively. The disease-free survival rates of 1, 3 and 5 years were 58.3%, 45.4% and 38.1%, respectively. There was no statistically significant difference in local control rate, survival rate, and disease-free survival between the radioactive seeds implantation group and the radioactive seeds implantation group after surgical resection. There were 2 cases of acute radiation reaction Ⅰ/Ⅱ and 3 cases of reaction Ⅲ or above. In the late stage of radiotherapy, there were 8 cases with Ⅰ/Ⅱ grade reaction and 3 cases with Ⅲ grade or above reaction. The incidence of radiation reactions of Grade Ⅲ and above was 7%. CONCLUSION ¹²⁵Ⅰ radioactive seeds implantation provides an alternative method for the treatment of recurrent salivary gland carcinoma after external radiotherapy. The local control rate and survival rate are improved on the premise of low incidence of side effects.
Brachytherapy/adverse effects* ; Humans ; Iodine Radioisotopes/therapeutic use* ; Neoplasm Recurrence, Local/radiotherapy* ; Salivary Gland Neoplasms/radiotherapy* ; Salivary Glands

This study primarily explored and discussed‘generality and individuality’mode in clinical teaching of congenital heart disease(Congenital heart disease,CHD)from the aspects of teaching methods,comparison with traditional method,requirements for teachers and problems existed under present conditions.At last the paper summarized advantages and disadvantages of this model in clinical teaching of CHD and offered a new approach for clinical teaching of cardiology.

Objective:To evaluate the knowledge, attitudes and practices ( KAP) on National Essential Medi-cine System among pharmacists from secondary public hospitals in Shaanxi province. Methods: The quantitative re-search of KAP questionnaire is used, and the content of questionnaire includes personal information, knowledge, atti-tudes and practices. Results: A total of 520 copies of questionnaires were distributed and 82. 3% were effective. Respondents’ overall knowledge and attitudes are at the middle level;the main way to obtain knowledge is via training and meeting;respondents’ education level and frequency of participating in training have a significant impact on their level of knowledge;the degree of attention paid by hospitals has yet to be strengthened; and respondents are mostly concerned about the supply and distribution of essential drugs. Conclusion: In order to improve the awareness and recognition levels of pharmacists on the implementation of National Essential Medicine System in secondary public hospitals, the government should take the relevant measures, including introducing the high educated persons into secondary public hospitals, organizing related training programs and standardizing the daily monitoring of essential drugs in secondary public hospitals, etc.

This article summarizes the pathogenesis of hypercoagulability in β thalassemia patients, including platelet activation, alteration of red blood cell membranes, abnormal expression of adhesion molecules on vascular endothelial cells and iron overload. Clinical evidence, clinical manifestations of hypercoagulable state and thrombosis in β thalassemia and the effect of splenectomy on hypercoagulable state were reviewed. Strategies to prevent and treat the thromboembolic events in β-thalassemia intermedia are also discussed, including transfusion therapy to raise hemoglobin levels, avoidance or delay of splenectomy and a number of treatments in the exploration.
Erythrocyte Aggregation ; Humans ; Thrombophilia ; etiology ; prevention & control ; beta-Thalassemia ; complications