Objective To observe the effect of dexmedetomidine on patients′ inflammation during CPB and protective effect on kidney and liver. Methods 60 cases undergoing cardiac valve replacement under CPB were randomly divided into NS group and Dex group. Blood samples were taken before induction , before ascending aorta blocked, end of CPB, 24, 48 and 72 hours after operation. The serum level of HMGB-1, TNF-α, IL-6, BUN, Cr and ALT are tested. Blood WBC and N% are also counted. Results WBC, N% and HMGB-1, TNF-α, IL-6, BUN, Cr in Dex group significantly decreased at time point T2 ~ T6 (P < 0.05) compared with NS group. But ALT in Dex group only decreased at time point T 2 and T5 compared with NS group (P < 0.05). Conclusion Dexmedetomidine can significantly decrease inflammatory factor during CPB and improve renal function after surgery.

Objective To analyze the early mortality and morbidity of early postoperative complications of gastric cancer patients submitted to D1 or D2 gastrectomy for improving the surgical effect.Methods All consecutive patients who underwent D1 or D2 radical gastric resection between January 2006 and December 2007 were evaluated.Clinicopathologic features of the tumor,the extent of lymphadenectomy,the postoperative mortality and the early morbidity of complication were analysed.Results There were 130 patients admitted for the treatment of gastric cancer.34 underwent D1 dissection and 96 underwent D2 dissection.The early morbidity of D2 dissection was higher than that of D1 dissection (20.6% vs.39.6%,P<0.05).When complications were analyzed individually,there was no significant difference.Although the postoperative mortality was higher in the D2 group,no significant difference was observed(4.2% vs.0,P>0.05).4 patients underwent D2 dissection died.Considering the causes of the 4 died patients,respiratory complication related to anaatomotic and pancreatic leakage was the most important.Conclusion This study indicates that D2 dissection is a safe and effective procedure and the extent of lymphadenectomy may be related with high postoperative complication morbidity and mortality.Improving the surgical dissection skill and standardizing the gastric lymphadenectomy are the key ways to decrease the morbidity and mortality.

DEAD (Asp-Glu-Ala-Asp) box polypeptide 43 (DDX43) plays an important role in the malignant proliferation,drug resistance of tumor cells as well as neoplasm immunotherapy.The overexpression of DDX43 has been found in various solid tumors and some hematologic malignancies.The hypomethylation of DDX43 gene promoter is identified in chronic myeloid leukemia,acute myeloid leukemia and myelodysplastic syndrome,which is correlated with DDX43 overexpression and the prognosis of these diseases.

OBJECTIVEThis work lays the foundation for establishing a digital model database with normal occlusion. A digital dental cast is acquired through grating projection, and model features are measured through reverse engineering.

METHODSThe grating projection system controlled by a computer was projected onto the surface of a normal dental model. Three-dimensional contour data were obtained through multi-angle shooting. A three-dimensional model was constructed, and the model features were analyzed by using reverse engineering. The digital model was compared with the plaster model to determine the accuracy of the measurement system.

RESULTSThe structure of three-dimensional reconstruction model was clear. The digital models of two measurements exhibited no significant difference (P > 0.05). When digital and plaster models were measured, we found that the crown length and arch width were not statistically different (P > 0.05), whereas the difference between the crown width and arch length was statistically significant (P < 0.05).

CONCLUSIONThe reconstruction of a digital model by using the grating projection technique and reverse engineering can be used for dental model measurement in clinic al and scientific research and can provide a scientific method for establishing a digital model database with normal occlusion.

Dental Models ; Dental Occlusion ; Imaging, Three-Dimensional

Objective To investigate the effect of recombinant adenovirus-mediated basic fibroblast growth factor (bFGF),interleukin-1 receptor antagonist protein (IL-Ra) and insulin-like growth factor(IGF)-1 gene transfection on human osteoarthritis chondrocytes.Methods Monolayer cultures of human osteoarthritis chondrocytes were transfected with recombinant adenovirus carrying genes encoding the following cytokines: human bFGF,IL-1Ra and IGF-1.Six days later,levels of gene expression and glycosaminoglycan (GAG) in culture supernatant were detected.The proliferation and apoptosis of chondrocytes were analyzed by methyl thiazolyl tetrazolium (MTT) and flow cytometry respectively.Matrix biosynthesis was observed by toluidine blue staining and immunohistochemistry examination of type Ⅱ collagen.The expression of type Ⅱ collagen,MMP-3 and TIMP-1 were analyzed by immunoblotting.Comparisons between groups were performed with one-way ANOVA analysis.Results The expression of all transgenes was high following adenoviral transfection compared with the OA control group (P<0.05).The delivery of bFGF alone promoted the cell proliferation and resulted in a significant enhanced biosynthesis of type Ⅱ collagen and proteoglycans of chondrocytes (P<0.05).Compared with bFGF transfection alone,as two or three of the genes were transfected in different combinations,apoptosis rate of chondrocytes was decreased [(26.1±1.6)%,(19.4±1.0)%.(18.4±1.1)%,(13.9±1.8)%.respectively P<0.05].There was marked enhancement of matrix synthesis and expression of TIMP-1.At the same time,the expression of MMP-3 was inhibited.Conciuslon The bFGF gene transfection mediated with adenoviral vectors can greatly promote cell proliferation and increase matrix synthesis in vitro. Compared to the expression of bFGF alone, concomitant gene transfection of bFGF, IL-IRa and IGF-1 in different combinations plays a complementary role, further enhances matrix synthesis and inhibits matrix degradation.

The non-specific accumulation and release of drugs are the main factors affecting the therapeutic effect as well as causing toxic side effects of chemotherapeutic drugs. Nowadays, the application of nanotechnology and responsive drug release is an important strategy to improve the tumor-specific accumulation of drugs and reduce their side effects. In this study, an α-enolase targeted peptide (ETP)-modified polyethylene glycol poly-lysine block copolymer loaded with oxaliplatin prodrug was synthesized first, and then, polymer-coating Fe₃O₄ nanoparticles were prepared by phase transfer dialysis method to improve the blood circulation stability and tumor targeting of oxaliplatin. At the same time, the physicochemical properties, reductant-responsive drug release, cellular uptake, tumor targeting and other biological functions of ETP modified oxaliplatin-loaded Fe₃O₄ nanoparticles were studied in vitro and in vivo. First, the results of reductant-triggered drug release study showed that the drug-loaded nanoparticles could achieve rapid release of more than 80% of the prototype oxaliplatin within 3 h under the reduction conditions simulating the tumor cytoplasmic microenvironment. Secondly, the results of flow cytometry showed that the modification of ETP could increase the ratio of cellular uptake of drug-loaded nanoparticles in tumor cells, and the way that drug-loaded nanoparticles endocytosed by tumor cells were mainly through the energy-dependent and receptor protein and fossin-mediated endocytosis pathway. The animal procedures were approved by the Institutional Animal Care and Use Committee of School of Pharmacy of Fudan University. Moreover, the results of pharmacokinetic experiment showed that the area under the curve (AUC_0-∞) of oxaliplatin could be significantly increased by nano-formulation which was about 5 times than that of free oxaliplatin. Besides, the pharmacokinetic results also showed that the drug-loaded Fe₃O₄ nanoparticles constructed by covalent linkage and chelation had good overall stability in vivo. Finally, the in vivo imaging results showed that ETP modification could increase tumor accumulation of drug-loaded nanoparticles, which would be conducive to the efficacy of oxaliplatin in tumor lesions. In summary, the oxaliplatin-loaded Fe₃O₄ nanoparticles with the capability of reductant-responsive drug release have good drug release characteristics, blood circulation stability and tumor targeting ability, and have the potential to improve the anti-tumor therapeutic effect of oxaliplatin.

OBJECTIVETo explore the effects of chronic hypoxia on left and right ventricular function and the expression of cardiac transient receptor potential canonical (TRPC) channels in rats.

METHODSForty eight SD male rats were randomly divided into control group (CON) and chronic hypoxic pulmonary hypertension model group (CH) (n = 24). In CH group, rats were exposed in chronic hypoxia environment (10% +/- 0.2% O2) to induce myocardial hypertrophy. After 3 weeks, mean systemic arterial pressure (mSAP), right ventricular systolic pressure (RVSP), left ventricular systolic pressure (LVSP), left or right ventricular pressure maximum rate of rise (LV/RV + dp/dt(max)), left or right ventricular pressure maximum rate of descent (LV/RV-dp/dt(max)), right ventricular hypertrophy index (RVMI) and left ventricular hypertrophy index (LVMI) were measured. Left and right ventricular myocardium tissue sections were stained by HE and observed under light microscope. Real-time polymerase chain reaction (real-time-PCR) and Western blot were performed to detect the expression of TRPC subfamily.

RESULTSRVSP, RVMI, RV + dp/dt(max) and RV-dp/dt(max) were markedly elevated in CH group (P < 0.01) in comparison to CON group. LVMI was markedly reduced in CH group in comparison to CON group (P < 0.01). LVSP, LV + dp/dt(max) and LV- dp/dt(max) had no significant changes in CH group in comparison to CON group. Right ventricular myocardial cells of CH group became thick, the nuclei stained deeply, the shape of nuclei became not regularity. Left ventricular myocardial fibers did not change significantly. There was significant difference in the levels of mRNA and protein of TRPC1 between CON and CH groups.

CONCLUSIONFor three weeks exposed to chronic hypoxia induced right ventricular hypertrophy specifically, raised the mRNA and protein expression of TRPC1 on right ventricular myocardial cells . TRPC1 might be involved in the development of cardiac hypertrophy.

Animals ; Disease Models, Animal ; Hypertension, Pulmonary ; metabolism ; physiopathology ; Hypoxia ; metabolism ; physiopathology ; Male ; Rats ; Rats, Sprague-Dawley ; Transient Receptor Potential Channels ; metabolism ; Ventricular Function, Left ; physiology ; Ventricular Function, Right ; physiology

Objective To study the changes of serum protein spectrum in patients with systematic lupus erythematosus (SLE) in order to screen specific protein markers. Methods Serum samples from 72 patients with SLE and 85 age- and sex-matched controls were assessed using surface-enhanced laser desorp-tion/ionization time-of-flight mass spectrometry (SELDI-TOF-MS) with weak cation exchange (CM10) pro-rein chip. Forty samples from the patients and 50 control samples were randomly selected to serve as a pre-liminary training set; significantly different protein peaks were automatically chosen for the system training and development of a decision classification tree model. The validity of the model was then challenged with a blind test set (including another 32 samples from patients and 35 from human controls). Results A total of 73 effective protein peaks were detected within the mass/charge ratio (m/z) interval 2000 - 50000, among which, 15 protein peaks significantly differed between patients with SLE and controls (P < 0.01). Three pro-tein peaks with an m/z value of 4001, 6305 and 7356 were automatically chosen as a biomarker pattern in the training set that discriminated patients with SLE from controls with a sensitivity of 90.0% (36/40), speci-ficity of 92.0% (46/50) and accuracy rate of 91.1% (82/90). When the SELDI marker pattern was tested with the blinded test set, it yielded a sensitivity of 87.5% (28/32), specificity of 91.4% (32/35) and accuracy rate of 89.6% (60/67). Conclusions SELDI-TOF-MS protein chip could be used to screen serum protein for SLE, and the decision classification tree model with these biomarkers may favor the diagnosis of SLE.

ObjectiveTo explore the effects of different flushing and scanning processing on optical density (A) responding and set up the clinic quality assurance protocol based on silver halide emulsions radiographic films.MethodsSetting different flushing temperature and choosing different batch's film and developer and fixer or fixer in the same batch with different analyzing dose were performed to analyze the effect on A value; The effect of light uniform,the stabilize work time and the noise of different scanning resolution were discussed.ResultsThe A value at the same dose level would enhance as the temperature increased;the responding curve of dose and A value with different batches of films varied a lot;the responding curve of dose and A value with different batches of films and developer and fixer solution had marked variations;the responding of dose and A with the same batches would show some low.The heterogeneity of the scanner would achieve 0.03 ; the A value of the same dose would gradually steady while the time ofscanning was more than 10 minutes:the affect of noise would increase as the dose and resolution ratio increased.ConclusionsThe best processing temperature is 29-31 ℃.Different batches of film couldn't be confounded.A new calibration must be obtained when the film dosimetry to evaluate dose distribution is used.A 5 - 10 min warm up for stabilize work and the best setting resolution/depth lever are 72 dpi/16 bit for scanning films are determined.

Objective To explore the dose rate response characterization of four kinds of dosimeters for clinical application.Methods Within the range of 100-600 cGy/min,the dose rate responses of the PTW 0.6 cm3 ion chamber,0.015 cm3 ion chamber,Matrixx Evolution 2D diode array and MapCHECK 2D diode array under the same measuring conditions were measured.The dose rate response of the PTW 0.6 cm3 ion chamber under different energy and working voltage were analyzed.Results All ionization chambe.r types of measured equipment showed certain dose rate dependence for 6 MV X-rays.All the differences were below 1％.The dose rate dependence disappeared for 15 MV X-rays.The 2D diode array had strong dose rate dependence and the response difference was about 2％.Conclusions It is necessary to test and analyze the dose rate response of the measured equipment in treatment technology with dose rate varying,in order to ensure the precision of daily calibration and dose verification.