Objective: To explore the sensitivity of Kit or PDGFRA mutants related to gastrointestinal stromal tumor (GIST) to Gleevec.Methods: The recombinant plasmids of KIT Del559-560, KIT Ins IPYD579, PDGFRA D842V and PDG-FRA L839P gene mutants were transiently transformed into the CHO cells by liposome methods.Western blot was used to detect the expression of the related protein and their phosphorylated forms after the cells were incubated with Gleevec for 90 min.At 72 hours after incubation with Gleevec, MTT was used to detect cell proliferation.Results: Western blot results showed that Gleevec at 0.1 μM can notably reduce phosphorylation of KIT Del559-560.Gleevec at 1μM completely blocked phosphorylation of KIT Ins IPYD579 and PDGFRA L839P, but did not affect PDGFRA D842V phosphorylation.MTT analy-sis indicated that growth of CHOPDGFRA L839P was inhibited by Gleevec at 1μM, however, CHOPDGFRA D842V was re-sistant to Gleevec at 5 μM.Conclusion: Gleevec can decrease the expression of phosphorylated protein CHOPDGFRA L839P and CHOKIT Ins IPYD579, and can remarkably inhibit the proliferation of cells containing PDGFRA L839P mutant.

Objective To compare the clinical efficacy and safety between percutaneous vertebroplasty (PVP) and conservative treatment for osteoporosis vertebral compression fracture (OVCF).Methods A total of 55 patients undergoing PVP and 65 patients with conservative treatment for OVCF in our hospital from 2006 to 2011 were retrospectively analysed.The degree of pain and personal life before treatment and after treatment at different time points were investigated by visual analogue scale (VAS) pain scale and Oswestry Disability Index (ODD.Results The degree of pain in lower back was reduced after the treatment.The VAS pain scales in PVP group versus control group were (8.3±0.5) vs.(8.50.6),(6.9±0.7) vs.(4.5±0.7),(5.40.6) vs.(3.4±0.5),(4.8±0.3) vs.(2.8±0.5),(4.0±0.4) vs.(2.3±0.4),(3.1±0.5) vs.(2.0±0.2)before treatment and 1 week,1,3,6 and 12 months after treatment,respectively.The VAS pain scales were reduced more rapidly in PVP group than in control group,showing a better relief of pain.There were differences in VAS pain scales between the two groups at different time points (t=17.89,19.74,28.38,24.49,14.01,respectively,all P＜0.01).The ODI scores in PVP group and control group were [(88.8±5.0) vs.(87.2±5.1)],[(72.6±7.8) vs.(53.1±6.3)],[(62.0±8.5) vs.(37.2±6.0)],[(47.1±12.6) vs.(26.5±3.6)],[(36.7±9.3) vs.(17.9±5.5)],[(24.3±10.0) vs.(9.4±2.5)] before treatment and 1 week,1,3,6 and 12 months after treatment,respectively.The ODI scores were reduced more rapidly in PVP group than in control group,showing a better recovery of daily life.There were differences in ODI scores between the two groups at different time points (t=15.00,18.17,11.74,13.20,10.72,respectively,all P＜0.01).Conclusions PVP can alleviate pain and restore daily life rapidly.It shows advantages in rccovery of the fractured vertebrae height.

BACKGROUND:Nanosilver has significant antibacterial properties, and nanohydroxyapatite has good biological activity and mechanical strength, while their mixture cannot only promote bone formation but also have antibacterial properties. OBJECTIVE:To observe the effect of nanosilver and nanohydroxyapatite mixed filing on the osseointegration of immediate implants. METHODS: Nine New Zealand white rabbits were randomly divided into experimental group (n=6) and control group (n=3) after four incisors from the upper and lower jaw were extracted. The mixture of nanosilver and nanohydroxyapatite was filed into the tooth socket in the experimental group, while nanohydroxyapatite was filed into the tooth socket in the control group. Titanium screw was immediately implanted into both groups. The intact maxila and mandibular specimens were harvested at the 4th, 8th, and 12th weeks after operation. Gross observation, X-ray bone density analysis, torque test and histological observation were conducted. RESULTS AND CONCLUSION:The gray value and maximum torque value of regenerated osseous tissue at different time points in experimental group were significantly higher than those in the control group (P < 0.05). Within 12 weeks of implantation, the bone formation rate and maturity of new bone tissue were higher in the experimental group compared with the control group, and no inflammatory cel infiltration occurred. At the 4th week after implantation, there was a large amount of inflammatory cel infiltration, and few inflammatory existed at the 8th week after implantation. These results demonstrate that compared with nanohydroxyapatite alone, the mixture of nanosilver and nanohydroxyapatite shows better antibacterial effect, biocompatibility and osteoinductive ability, which may accelerate osseointegration and promote osteogenesis.

Aim Toinvestigatetheinducementeffect of isatin on apoptosis of breast cancer cell line MCF-7 , andexploreitsdetailedmechanism.Methods MCF-7 cell lines were exposed to isatin at different concentra-tions(0,50,100,200 μmol·L-1 )for 48 h.Apop-totic features were demonstrated by nuclei staining with Hoechst 33258.Bcl-2,Bax and p53 mRNA were ana-lyzed by RT-PCR.Caspase-9 activation and mitochon-drial depolarization were assayed by flow cytometry. Bcl-2,Bax,p53 and cytochrome c proteins were ana-lyzedbyWesternblot.Results Isatininducesapopto-sis of MCF-7 cells.Furthermore,Bcl-2 expression was decreased and the ratio of Bcl-2 to Bax was significant-ly decreased by isatin.While,p53 expression relative-ly decreased.The mitochondrial transmembrane poten-tial was markedly reduced and the release of cyto-chrome c into the cytosol was increased after treatment with isatin.Simultaneously,caspase-9 was activated. Conclusions Isatinsignificantlyinducedtheapopto-sis of MCF-7 cells in vitro.These results strongly sug-gest that the p53 dependent mitochondrial pathway is involved in apoptosis.

Objective To observe the effects of Grifola frondosa polysaccharide on T cell subsets and Th1/Th2 subsets of spleen deficiency mice, and investigate its immunoregulation mechanism. Methods Forty-eight KM mice were divided into 6 groups:normal group, spleen deficiency group, positive group (lentinan), three dosage groups of Grifola frondosa polysaccharide, 8 mice in each group. The mice were injected corresponding drug intraperitoneally for 10 days. Then mice in each group were detected CD3+, CD4+ and CD8+T cell by flow cytometry. IFN-γ and IL-4 levels were detected by ELISA. Results The high dose of Grifola frondosa polysaccharide could significantly increase the CD4+T lymphocytes percentage in peripheral blood (P<0.05). Medium and high dose of Grifola frondosa polysaccharide could significantly increase CD4+/CD8+T cell ratio (P<0.01) and CD3+T lymphocyte percentage (P <0.01) of spleen deficiency mice. Medium and high dose of grifola frondosa polysaccharide could significantly increase IFN-γ level in serum of spleen deficiency mice (P<0.01), and high dose of Grifola frondosa polysaccharide could decrease IL-4 level in serum of spleen deficiency mice (P<0.01). Conclusion Grifola frondosa polysaccharide can improve the decreased CD4+/CD8+T cell ratio which caused by spleen deficiency, and promote the transformation of Th1 to Th2, thus treating spleen deficiency syndrome.

Objective To investigate the incidence and clinical characteristics and look for assay or examination indexes or indicators with higher sensitivity and specificity of heart damage induced by exhaustive exercise in order to establish its preliminary clinical classification and diagnostic criteria. Methods In a military region for training staff,the clinical data of 88 soldiers who were admitted to the departments of cardiology in 6 general or central hospitals because of exhaustive exercise from January 2000 to December 2010 were analyzed. The myocardial enzyme, electrocardiogram(ECG),echocardiography and other related examination indexes or indicators were observed,and the changes of symptoms,signs and other relevant assay and examination indexes before and after treatment were recorded. Results Exhaustive exercise could cause the symptoms such as chest tightness,palpitations,chest pain, dizziness,shortness of breath,fatigue,syncope and other symptoms,as well as cardiac auscultation abnormalities. After treatment, aspartate aminotransferase〔AST(U/L):20.34±6.33 vs. 35.43±25.25〕,α-hydroxybutyrate dehydrogenase〔α-HBDH(U/L):130.47±9.04 vs. 168.93±62.69〕,lactate dehydrogenase〔LDH(μmol?s-1?L-1):2.48±0.62 vs. 3.58±1.34〕,creatine kinase〔CK(U/L):125.58±67.56 vs. 556.42±381.89〕,creatine kinase isoenzyme〔CK-MB(U/L):11.20±4.08 vs. 23.09±15.61〕were significantly lower than those before treatment(P<0.05 or P<0.01);cardiac troponin T(cTnT)was detected in 5 patients,its level after treatment was significantly lower than that before treatment(μg/L:0.07±0.05 vs. 1.26±0.78,P<0.05). The ECG abnormalities included primarily sinus bradycardia (16 cases),sinus arrhythmia (13 cases) and premature ventricular contractions (11 cases). Echocardiographic abnormalities appeared in 18 cases,they were chiefly as follows:valvular regurgitation, cardiac dysfunction,cardiac enlargement,etc,among which the most common one was valvular regurgitation(all the refluxes were of small amount). Based on the above clinical manifestations and examination results,the exhaustive cardiac injuries were preliminarily divided into common type(20 cases),arrhythmia type(56 cases),heart failure type(2 cases)and sudden death(10 cases). Conclusions The clinical manifestations of exhaustive heart damage may appear in different types. Abnormal changes of myocardial enzymes,ECG and echocardiography are the strong evidences for the damage. Clinicians should pay attention to its prevention and treatment.

Objective To investigate the relationship of insulin resistance and secretion during late pregnancy in women with glucose intolerance.Methods Immunoenzymetric assay was used to measure the fasting serum insulin levels in 122 pregnant women which including of 36 pregnant women with gestational diabetes mellitus(GDM),34 pregnant women with gestational impaired glucose tolerance(GIGT),and 52 pregnant women with normal glucose tolerance(NGT).The fasting plasma glucose levels were measured by glucose oxidase method.The insulin sensitivity index(ISI) and islet secretive function index(IFI) were compared between the three groups.Results ISI had an increasing trend from NGT group,GIGT group to GDM group(P

Objective To discuss the clinical effect of artificial pneumothorax combined with intercostal nerve block in alleviating chest pain occurring during and after percutaneous microwave ablation (MWA) for subpleural lung malignancy.Methods A total of 30 patients with subpleural lung malignancy were randomly and equally divided into group A (n=10),group B (n=10) and group C (n=10).The patients in group A received both artificial pneumothorax and intercostal nerve block before MWA.The patients in group B only received artificial pneumothorax before MWA,and the patients in group C only received intercostal nerve block before MWA.The degree of pain was evaluated by visual analogue scale (VAS) score during MWA,immediately after MWA and at 6 h,12 h and 24 h after WMA.The side effects after MWA were recorded.Results During MWA,no statistically significant differences in VAS scores existed between each other among the three groups (P=0.885).The VAS scores determined at 6 h,12 h and 24 h after MWA in group C were significantly increased (P=0.014,P=0.006 and P=0.006 respectively).No patient in group A and group B developed symptoms of chest tightness after artificial pneumothorax was performed.After treatment,a small amount of asymptomatic residual pneumothorax was still observed in 6 patients of group A and group B,which disappeared spontaneously in about one week.Another patient still showed massive pneumothorax even after thoracic gas suction,and the patient recovered after thoracic closed drainage for three days.No other serious complications related to artificial pneumothorax occurred.Conclusion Artificial pneumothorax combined with intercostal nerve block can effectively relieve the chest pain occurring during and after MWA in patients with subpleural lung malignancy,and clinically this technique is quite safe.(J Intervent Radiol,2017,26:269-273)

Objective To investigate the expression of CK19mRNA and CD44mRNA in peripheral blood of patients with breast cancer for forecasting micrometastasis. Methods Expression of CK19 and CD44 were detected in 107 patients by RT-PCR method. Results CK19 and CD44 were positive in 31.8%(34/107) and 32.7%(35/107) of patients with breast cancer 24 hours before surgery respectively,which were statistically different from that of 12 days postoperatively and that of normal controls (all P

BACKGROUND: Based on a mouse model of tibial implantation, some scholars have found that the CaP-coated implant with recombinant human parathyroid hormone (1-34) (PTH(1-34)) shows strong osteogenesis effect at early stage, but this coating has not been applied in the oral environment.OBJECTIVE: To explore the role of local application of PTH(1-34) on immediate implant osseointegration . METHODS: Nine New Zealand white rabbits were randomly divided into two groups (six in experimental group and three in control group). All of the tooth sockets were filled with heterogeneous freeze-dried bone firstly after four incisors of each rabbit were extracted. In the experimental group, a titanium screw with PTH(1-34) loaded CaP coating was implanted into each tooth socket, while in the control group, a titanium screw with only CaP coating was implanted. The animals were executed respectively at 4, 8, 12 weeks after operation, and the intact maxillary and mandibular specimens were harvested and tested by gross observation, bone density analysis, torque test, histologic al observation, X-ray observation.RESULTS AND CONCLUSION: The gray value and maximum torque value of regenerated osseous tissue at different time points in the experimental group were significantly higher than those in the control group (P < 0.05). Within 4-12 weeks after implantation, regenerated and mature bone tissue appeared earlier in the experimental group than the control group. A large amount of new blood vessels were seen in the experimental group at 8 weeks after implantation, while in the control group, there were only few new blood vessels. To conclude, the local application of PTH(1-34) can promote bone formation, improve the implant-bone bonding strength, and enhance the stability of the implant.