Objective:To investigate the proliferating inhibition and the mechanisms of dsRNA interference c-erbB-2 and c-raf-1 genes expression combined transfection in the human tongue carcinoma Tca8113 cell lines.Methods:There were 3 groups in our study,control group,normal control group and RNAi experimental group.At different time after liposome-mediated transfection,the cell proliferation,apoptosis,mRNA level,protein expressing level and cell cycle were observed by MTT,RT-PCR and electronic microscope.Results:According to the results of RNAi experimental group,the OD-value were 0.073( P

Objective: To investigate the interfering efficiency of RNAi technique on the expression of c-erbB-2 and Bcl-2 oncogene in human tongue squamous carcinoma(Tca8113).Methods: The recombined RNAi plasmids for c-erbB-2 and Bcl-2 oncogene were constituted by the four succussive steps-designing of Oligo DNAs,synthesis of Oligo DNAs,transfection of Oligo DNAs into pSUPER.neo+gfp vectors and selection of positive plasmids.In order to silence the expression of c-erbB-2 and Bcl-2 oncogenes,the recombined RNAi plasmids were transfected into Tca8113 cells by culturing together for about 10 hours,and the interfering efficiency of RNAi for the two oncogenes was evaluated by fluorescence-quantitative RT-PCR.Results: The interfering efficiencies for c-erbB-2 oncogene were 62.68% and 40.61%,respectively in psiC1?psiC2?psiC3,while the interfering efficiencies for Bcl-2 oncogene were 66.20% and respectively in psiB1?siB2?psiB3.Conclusion: The recombined RNAi plasmids of psiC2(gAgTCCCAACCATgTCAAA) for c-erbB-2 oncogene and of psiB2(CCgggAgATAgTgATgAA) for Bcl-2 oncogene can effectively silence the expression of c-erbB-2 and Bcl-2 oncogenes in Tca8113 cell.

The receptor for advanced glycation end product (RAGE) is a member of the immunoglobulin superfamily of cell surface molecules.As a pattern recognition receptor,it can bind with a variety of ligands.The adult lung is unique in which it expresses high amounts of RAGE under normal conditions while other tissues express low amounts normally and up-regulate RAGE during pathologic processes.The lung exhibits high basal level expression of RAGE localised mainly in alveolar type I cells,suggesting a potentially important role for the receptor in epithelial cell proliferation and differentiation and maintaining lung homeostasis.Indeed,disruption of RAGE levels has been implicated in the pathogenesis of a variety of pulmonary disorders such as acute and chronic lung injury.Furthermore,its soluble form sRAGE,as a decoy receptor,has been shown as an important marker of alveolar epithelial type I cell injury.Studies have suggested that RAGE plays an important role in the biology of the lung and may become a therapeutic target for lung injury.

According to existing problems in polysaccharide determination methods in new Chinese drug applications, the method suitability, chemical reference selection, components interference and method research were introduced. The author suggests that suitable determination method should be selected according to the structure and property of the polysaccharide, and validated. Some influent factors should be examined to assure the accuracy of the method, such as the stability and using amount of the visualizing reagent, visualizing time, maximum detection wavelength etc. Monosaccharide and other water soluble components should be removed from polysaccharide sample, and suitable reference substance and detection wavelength should be selected. It should pay attention to mutual interference of neutral and acidic saccharide, and use inhibitor to eliminate the interference. Because the slopes of the standard curves are different for different monosaccharide, it is proposed that the types and ratios of the monosaccharide in heteroglycan should be understood, and mixed reference substance solution in the ratio is prepared for determination.
Drugs, Chinese Herbal ; chemistry ; Monosaccharides ; analysis ; isolation & purification ; Polysaccharides ; analysis ; isolation & purification ; Research ; trends ; Technology, Pharmaceutical ; methods ; trends

BACKGROUND:Tumor cels are resistant to chemotherapeutic drugs, and drug resistance is closely correlated with tumor stem cels. Therefore, how to kil tumor stem cels wil become the key to the treatment of oral squamous cel carcinoma. OBJECTIVE:To study the effect of 5-fluorouracil on biological characteristics of tongue squamous cel carcinoma Tca8113 cels. METHODS:Viability of Tca8113 cels treated with different concentrations of 5-fluorouracil was determined by cel counting kit-8, and the best drug concentration and time were screened for subsequent experiments. Tca8113 cels without 5-fluorouracil acted as control group. Then the cel cycle and percentage of the side population cels in Tca8113 cels were determined by flow cytometry. Scratch test was used to determine the migration ability of Tca8113 cels. RESULTS AND CONCLUSION:Results from cel counting kit-8 showed that 5-fluorouracil inhibited the viability of Tca8113 cels positively in a time- and dose-dependent manner. Tca8113 cels under intervention with 50 mg/L 5-fluorouracil for 48 hours showed lowest cel viability. Flow cytometry results showed that in the experimental group, G0/G1 phase cels increased significantly compared with the control group (P=0.01), S phase cels decreased significantly compared with the control group (P=0.244), and G2/M phase cels disappeared completely. After treatment with 5-fluorouracil, the percentage of side population cels was increased significantly (P=0.00). The scratch test showed that in the experimental group, the cels had better ability of wound healing than those in the control group. In conclusion, 5-fluorouracil can enrich the cancer stem cel population in Tca8113 cels.

OBJECTIVE To study the 16 genotypes of ?-lactamase in multidrug-resistant Acinetobacter baumannii isolated from inpatients,to know the state of multidrug resistance of A.baumannii in Urumqi.METHODS Bacterial strains were identified by system of API,and antibiotic susceptibility test was detected by K-B and microdilution according CLSI.PCR was used to determine the genotypes of ?-lactamase and compare with that in GenBank.RESULTS The antibiotic resistance rates to cefataxime and tetracycline of the isolates were the highest,(100%).Resistance rate to cefoperazone/sulbactam was the lowest(5 TEM(25%)strains and 10 OXA-23 strains(50%)from 20 strains multidrug resistant A.baumannii).CONCLUSIONS There is a high percentage of multidrug resistance production of A.baumannii in Urumqi.The ?-lactamase is focused on TEM and OXA-23;it is deserved to make further augmentation of epidemiology surveillance on ?-lactamase.

Objective To study the effects of recombinant human erythropoietin(r-HuEPO) on RBC immunity in chronic renal failure(CRF) patients.Methods Forty-five CRF patients were divided into two groups : 20 patients without r-HuEPO(control group) and 25 patients with r-HuEPO more than one month(experimental group).The RBC-C_(3b)RR and RBC-ICRR in two groups were counted under microscope and the correlations between HB or CRE and RBC-C_(3b)RR were calculated.Results The concentrationd of Hb,RBC-C_(3b)RR in experimental group were much higher than those in control group(P

Objective To evaluate the effect of OTD(observation-teaching-discussion) method in teaching of kinesiology of rehabilitation medicine.Methods 110 students majoring in rehabilitation medicine were divided into two groups,routine teaching group(56 students) and OTD teaching group(54 students),and the teaching effect was evaluated by exam score and questionnaire.Results There were obvious difference in the exam score and questionnaire between two groups(P<0.01).Conclusion In the teaching of medical rehabilitation,OTD method is more advantageous than routine method in bring up students' study interest,the initiative spirit,and the ability of self-study and analyzing.

Based on the assessment of protease (acid,neutral and alkaline protease) activity and amylase activity (?- amylase and ?- amylase),one Aspergillus oryzae K61 was selected from five wild Aspergillus oryzae which are original from spontaneous fermented soybean paste.One Aspergillus oryzae Y29 was screened with ultraviolet radiation.The Aspergillus oryzae Y29 can produce higher protease activity than original Aspergillus oryzae K61,and its hereditary stability is higher.Compared with Aspergillus oryzae 3.042,the Aspergillus oryzae Y29 showed higher protease activity,however,the both strains did not have significant difference on the amylase activity,growing speed of the strain and number of spore.Both strains were applied to producing soybean paste.The soybean that was produced by Aspergillus oryzae Y29 has full-bodied soybean paste flavor,and the soluble nitrogen (0.77g/100ml) is higher than the Aspergillus oryzae 3.042.