Objective To study the effects of RNA interference(RNAi)-mediated silencing of mitofusin-2 (Mfn2) gene on glycornetabolism and insulin resistance in BALB/c mice. Methods Mfn2 short hairpin RNA (shRNA) and negative control green fluorescent protein(GFP) -expressed plasmid vectors were constructed. 44 mice were randomly divided into transfection group (Mfn2) and negative control group (HK). 1.5 ml GFP-expressed plasmid(negative control or Mfn2 shRNA,75 μg for each mouse)was injected into the mice in 5 seconds through vena caudalis. Five days later, intraperitoneal glucose tolerance test (IPGTT) and intraperitoneal insulin tolerance test(IPITT)were performed to evaluate glycometabolism and insulin sensitivity. D-3-[3~H]-glucose in PBS buffer were injected via the tail vein. Blood samples were taken at specific time points. Radioactivity was measured in all samples with liquid scintillation counter. The rates of hepatic glucose production in vivo were calculated. Mfn2 protein expression in hepatic tissue was detected by Western blot. Results Compared with HK mice, the Mfn2 expressions of Mfn2 mice decreased markedly(8.05±0.15 vs 8.56±0.01 ,P<0.05). The fasted blood glucose leves [(6.95±0. 83 vs 4.68±0. 29) mmol/L,P<0. 05] in Mfn2 mice were higher than those in HK mice. The insulin sensitivity of Mfn2 mice decreased markedly compared with HK mice. The rate of hepatic glucose production was significantly elevated in Mfn2 mice [(49.53±16.31)μmol·kg~(-1)·min~(-1)],compared with negative control mice[(24.91±4.07)μmol·kg~(-1)·min~(-1),P<0.05].Conclusion The down-regulatd expression of Mfn2 induces glycometabolic disorder and insulin resistance in BALB/c mice. Mfn2 plays an important role in maintaining glucose homeostasis in vivo.

Purpose To investigate the effect of sensitivity on image quality and radiation dosage of digital chest radiography. Materials and Methods A total of 300 healthy people undergoing chest X-ray examination were randomly enrolled and divided into two groups according to body weight (150 people with normal weight and 150 overweight), which were further randomly divided into three subgroups (S200 subgroup with low-sensitivity, S400 subgroup with mid-sensitivity, S800 subgroup with high sensitivity, each subgroup contained 50 people). With other parameters unchanged, digital chest photography with different sensitivities was performed to each subgroup (S200, S400 and S800, respectively), and then uploaded the data to PACS and recorded mAs value and dose area product (DAP) value for each time. Then the image quality was assessed by three doctors in terms of mAs value, DAP, image quality score and noise score. Results In all subgroups of normal weight, differences on mAs and DAP were significant (F=1443.191-1829.895, P<0.05) whilst differences on image quality score and noise score were not significant (F=0.686-2.516, P>0.05). In all overweight subgroups, differences in mAs, DAP, image quality score and noise score were significant (F=163.358-290.656, P<0.05). According to one-factor analysis of variance, mAs value was S200>S400>S800 (F=0.626-3.210, P<0.05), DAP value was S200>S400>S800 (F=0.416-1.416, P<0.05), there was no difference in image quality score and noise score (F=0.001-0.100, P>0.05). In overweight group, there was no difference between subgroups of S200 and S400 (F=0.120-0.145, P>0.05); whilst differences between subgroups of S200 and S800 were significant, the same appeared in subgroups of S400 and S800 (F=1.655-2.360, P<0.05). Conclusion Radiation dose can be effectively controlled by regulating sensitivity with image quality unaffected. It is advisable to choose high-sensitivity photography for patients with normal weight and low or mid-sensitivity photography for overweight patients.

Objective To compare the dosimetry between inversely optimised intensity-modulated radiotherapy (IMRT) and three-dimensional conformal radiotherapy using the field-in-field technique (FIF) for whole-breast radiotherapy with a boost to the tumor bed after breast-conserving surgery.Methods IMRT and FIF treatment plans were respectively performed and optimised for 9 patients with early stage leftbreast cancer after breast-concerving surgery.The prescribed dose of breast was 50.4 Gy in 28 fractions,1.8 Gy per fraction and that of tumor bed was 61.6 Gy in 28 fractions,2.2 Gy per fraction.The conformity index,the dose and volume for OAR( organs at risks),time of planning and treatment for the two plans were compared.Results The conformity index(CI) for IMRT was improved compared with the FIF in breast [(1.82±0.16) vs.(2.21±0.15)] and tumor bed [(1.19±0.04) vs.(1.59±0.11),t=2.08,3.97,P ＜ 0.05 ].There was no difference for V20 of ipsilateral lung and V30 of heart between two plans.The Dmax and Dmean of the contralateral lung of FIF were (5.41 ±2.76) and (0.51 ±0.10) Gy,lower than those of IMRT [ (25.72 ± 2.61 ) and (7.46 ± 0.39) Gy,t =-22.44,- 21.14,P ＜ 0.05 ].The Dmax and Dmean of the contralateral breast of FIF were (8.50 ± 5.61 ) and (0.47 ± 0.11 ) Gy,lower than those of IMRT [(27.73±4.30) and (6.38±0.48) Gy,t=-5.66,-14.83,P＜0.05].ForFIF,theV5of the contralateral lung and breast were (0.09 ± 0.09) ％ and (0.45 ± 0.45 ) ％,respectively,lower than those of IMRT,which were (84.66 ±3.06) ％ and (60.79 ±4.94)％ (t =-28.19,- 12.80,P＜0.05).The time of optimised plan was (61.57 ± 0.89) min for FIF and(241.28 ± 1.06) min for IMRT (t=-32.35,P＜0.05),and that of treatment were (16.14±1.42) min for FIF and (29.85 ±0.59) min for IMRT (t =- 8.82,P ＜ 0.05).Conclusions For patients with early stage breast cancer after breast-concerving surgery,IMRT could improve the conformity index of target but increase the dose of eontralateral lung and breast.However,FIF has advantage on the time of optimising plan and treatment.

AIM: To establish the method of determining psoralen and isopsoralen in Bushen Yinao Capsules(Fructus Psoraleae,Radix et Rhizoma Ginseng Rubra,Poria,etc.). METHODS: HPLC conditions were as(follows:) Chromasil C_(18) column,a mobile phase of CH_3OH-H_2O(55∶45),and the wavelength at 247 nm. RESULTS: This method showed a good linear relationship in the ranges of 0.038-0.309 ?g(psoralen) and 0.036-0.295 ?g(isopsoralen).The average recoveries were 99.50% for psoralen(RSD was 0.91%,n=5) and 100.52% for isopsoralen(RSD was 1.70%,n=5). CONCLUSION: The method is simple,swift,accurate and practical in quality control of Bushen Yinao Capsules.

Circulating tumor cells ( CTCs ) exists in peripheral blood of patients with a variety of malignant tumors , the accurate detection of CTCs helps early detection of cancer , and can be used to guide individualized treatment of cancer patients , rapid assessment of tumor chemotherapy drugs and detection of tumor recurrence .However , the CTCs in peripheral blood of cancer patients were extremely low , their detection requires efficient and specific enrichment and separation methods .The new microfluidic technology can accurately control the microliquid preciously , combined with the immunomagnetic separation technology , has been applied in detecting CTCs , which can save the blood samples of CTCs , has the advantages of simple operation , fast sorting speed , high specificity and high purity .

Objective To explore the effect of individualized chemotherapy plans which was designed depend on secific genetic characters in patients with advanced cancer.Methods The surgery or biopsy specimen samples from 25 patients with advanced recurrent tumors (study group) were analyzed.Different gene mRNA expressions were detected by PCR and sequencing.According to detection results,the most appropriate chemotherapy would be applied on 25 cases patients of study group.The chemotherapy from traditional experience and evidence-based medical evidence were applied for 20 cases patients of control group.The difference of RR and disease control rate (DCR) between two groups were compared.Results The DCR and RR were 84 ％ (21/25) and 44 ％ (11/25) in study group,35 ％ (7/20) and 15 ％ (3/20) in control group.The DCR and RR in study group were significantly higher than those in control group (P ＜ 0.01).Conclusion Individualized chemotherapy could improve the efficient and prolong the survival period of the patients with advanced recurrent tumors.

Cell separation technology is an important means for cell sorting and cell-population purification. It is the current international research hot spot in biochemical analysis which has very important applications in many fields such as biology, medicine, agriculture and environment. This review introduces the development status of cell separation using microfluidic chip based on dielectrophoresis. It expounds the working principle of dielectrophoresis and the key factors such as cell size, electrode shape and signals that impacts the dielectrophoresis of cell separation on different types of microfluidic chip. Finally, it forecasts the future development trend of cell separation using microfluidic chip based on dielectrophoresis.

Objective To explore the effect of Angiopoietin-2(ANG-2) and Endostatin (ENS) in patho genesis and development of endometriosis.Methods Twenty-five endometriosis cases and 24 controls were enrolled. ANG-2 and ENS in endometrium were detected by Immunohistochemistry. The concentrations of ANG-2 and ENS in peritoneal fluid were measured with enzyme linked immunoabsorbant assay.Results In the EMs group,ANG-2 positive rate in eutopic endometrium was significantly higher than that of ectopic endometrium. The ANG-2 positive rate in ectopic endometrium was significantly higher than that of control group;in EMs group,the ENS positive rate in ectopic endometrium was significantly higher than that in eutopic endometrium.The ENS positive rate in eutopic endometrium was significantly higher than that in control group. There was no significant difference of ANG-2 or ENS between stageⅠ～Ⅱand stage Ⅲ～Ⅳ. In peritoneal fluid,ANG-2 and ENS concentration and ratio of ANG-2/ENS in endometriosis were significantly higher than that in controls. Conclusion The effect of angiopoietin-2 and endostatin in angiogenesis of endometriosis are important play a role in pathogenesis and development of the endometriosis.

Objective:To prepare dendritic cell (DC)-cytokine induced killer (CIK) tumor vaccine using DCs of patients with nonsmall-cell lung cancer (NSCLC) harboring autologous tumor antigens and to observe its inhibitory effect on autologous tumor cells in vitro. Methods: Peripheral blood mononuclear cells (PBMCs) extracted from NSCLC patients were cultured into DCs and CIKs in presence of different cytokines. Cancer cells from the patients were cultured in vitro and were used to prepare different tumor antigens: tumor cell lysates, necrotic tumor cells and normally-grown tumor cells. The DCs were stimulated by OK-432 and the phenotypes of the DCs were analyzed by flow cytometer. Then the DCs were co-cultured with CIKs. The anti-tumor effect of DC-CIK was evaluated by MTT assay. Results: Compared with the DCs harboring the antigens of necrotic tumor cells and normally-grown tumor cells, DCs pulsed with tumor cell lysates had significantly higher expression of surface molecules such as CD1a (85.1?2.7), CD80 (80.0?4.4), CD83 (75.4?5.3), and HLA-DR(80.5?7.8, all P

Objective To develop data analytic system of physiological parameters detecting device for pilots.Methods By analyzing the demands,the functions of the system were established;adopting module structure and Objective Oriented method,the system structure was designed;and applying modern digital signal processing technique,algorithms were de-veloped.Results The system has following functions: detection of QRS complex wave and breath rate,arrhythmia analyzing,HRV analyzing and synchro-analyzing of multi-parameter.Conclusion The application in many units demonstrates that the system is feasible,stable and reliable.It is useful for flight surgeon to know the physiological state of pilots.