Objective:To investigate the common reasons for the failure of radical mastoidectomy in order to improve the result of treatment and obtain a dry ear.Method:Twenty-eight cases,who achieved no dry ear after radical mastoidectomy,underwent secondary surgery.Result:All cases obtained dry ear without vertigo or facial paralysis after operation and postoperative dressing.Conclusion:The reasons for the failure of radical mastoidectomy result from the incomplete clearance of lesions, the insufficient ventilation of mastoid cavities, the inappropriate postoperative dressings or the residual foreign bodies in surgical cavity.It is the key points to achieve skeletonization adequately, to eliminate the pathological tissues thoroughly under microscope, and to ensure unobstructed drainage of surgical cavities for preventing secondary surgery.

Objective To study the anti-tumor effect and mechanism of bortezomib in primary acute leukemia cells from elderly patients.Methods Primary acute leukemia cells were treated with bortezomib 50-5000 nmol/L for 24-48 h,cell proliferation was analysed by MTT assay; apoptosis of primary acute leukemia cells was observed by fluorescence microscopy and flow cytometry; protein expression of bcl-2 and Bax was detected by Western blot.Results The cell viability was 90 ％ and 70 ％ when leukemia cells were treated with 50 and 5000 nmol/L bortezomib for 24 h,respectively.Meanwhile,cells showed (10.2±2.3) ％ and (13.3±3.3) ％ apoptosis.With prolonged treatment for 48 h,cell viability decreased to 86 ％ and 60 ％,respectively,while the apoptosis rates were increased to(18.4±3.9) ％ and(20.7±3.7) ％.Compared to the control group 0 nmol/L bortezomib,the differences were statistically significant (F =53.76,F =7.74,F =54.49,F =16.94,all P values ＜ 0.05).With the increase of bortezomib concentration,the bcl-2 protein expression was decreased,while Bax was up-regulated.Conclusion Bortezomib can inhibit primary leukemia cells from elderly patients proliferation and induce apoptosis.The mechanism may be associated with the changes in bcl-2 family protein expression.

Objective To study genetic polymorphism of 6 Y chromosomal STR in Hui ethnic group living in Ningxia Hui ethnic autonomous region, in order to evaluate their usefulness in forensic science and enrich the Chinese genetic information resources. Methods We investigated 101 unrelated, healthy, male individuals of Hui ethnic group and studied their allelic frequency distribution and haplotype diversity of 6 Y chromosomal STR. Primer for each loci was labeled with the fluorescent by FAM (blue) or TAMRA(yellow). The data of Hui ethnic group were generated co-amplification, GeneScan, genotype, and genetic distribution analysis. Results 31 alleles and 43 phenotype(DYS385) were detected, with the frequencies ranging from 0.0099-0.7129. Out of a total of 101 individuals, 96 showed different haplotypes; 91 were unique; 5 were found 2 times. The haplotype diversity for 6 Y-STR loci was 0.9990. Conclusion The date obtained can be valuable for individual identification, paternity testing in forensic fields and for population genetics because of 6 Y-STR loci high polymorphism.

Purpose To study the effect of China cobra venom active factor(CCVAF) from China cobra venom on endothelial cells and its mechanism.Methods MTT experiment was adopted to evaluate the effect of CCVAF on bovine arteria pulmonalis vascular endothelial cells(BAVEC).The Eosin-Coomassie brillient blue and rhodamine-phalloidin method was used for actin cytoskeleton.Flow cytometry for [Ca~(2+)]_i and spectrophotometry were used for lactate dehydrogenase(LDH) and nitrogen oxide(NO) levels in cell culture supernatant.Results CCVAF(0.625-20 μg/mL) inhibited the proliferation of BAVEC in dose-dependent manner,and IC50 of CCVAF on BAVEC was 2.45 μg/mL. After CCVAF and BAVEC coincubation, it was showed that regression of intercellular conjunctions and disorder of F-actin distribution occurred. The content of [Ca~(2+)]_i, [LDH] and [NO] increased respectively.Conclusion CCVAF can inhibit BAVEC proliferation and it maybe associated with the change of cytoskeleton and increasing of [Ca~(2+)]_i,[LDH] aod [NO].

Objective To evaluate the efficacy of partial cystectomy in treatment of localized muscle invasive bladder cancer.Methods From 1999 to 2005,data from 71 patients with muscle invasive bladder cancer(MIBC) were reviewed.There were 47 patients underwent partial cystectomy (PC) and 24 underwent total cystectomy (TC).The overall survival and disease-free survival in patients with MIBC with PC or TC were compared.All patients had pathologic T2-T3.Matched Kaplan-Meier survival analyses compared the effect of PC vs.TC on overall survival and disease-free survival.Univariate (log rank) and multivariate (Cox' proportional hazard model) analyses were used to test the statistical significance of several potential prognostic factors for survival rate.Results In the entire cohort,the overall survival rate and disease-free survival rate estimated at 5 years were 57％ and 50％ for PC patients,53％ and 46％ for TC patients,respectively (P＞0.05).On univariate analysis,T stage (include vessel tumor embolus) and whether the tumor was pedunculated were the significant predictors of tumor recurrence.Age,gender,tumor quantity,tumor size and histology category were not associated with prognosis.Cox proportional hazard regression model confirmed that the independent prognosis factors of tumor was T stage (EXP(B)=1.64,P＜0.05).Conclusions PC might not undermine cancer control in appropriately selected patients with MIBC.

Objective To evaluate postprandial pharmacokinetics and bioequivalence of two preparations of cefdinir capsules in Chinese healthy volunteers. Methods In a two-way cross-over study, 24 healthy male volunteers were divided into two groups randomly and a single dose of cefdinir capsules of test and reference preparation were administered orally, respectively.The concentration in plasma was determined by LC-MS/MS. Pharmacokinetic parameters and bioequivalence were calculated and evaluated by DAS. Results The main pharmacokinetic parameters of test and reference were as follows: AUCt (4.35±1.09) μg??h??mL-1 and (4.12±1.22) μg??h??mL-1, AUC0-∞(4.53±1.12) and (4.53±1.73) μg??h??mL-1, t1/2 (1.74±0.29) h and (2.13±1.65) h, tmax(4.44±0.86) h and (4.54 ±1.16) h, Cmax(900±250) ng??mL-1 and (876±269) ng??mL-1 . Conclusion The test and reference preparation of cefdinir capsules are bioequivalent.

Objective To establish a mice model of diffuse large B-cell lymphoma (DLBCL) that was treated with adoptive immunity of Th17 cells cultured in vitro,and to analyze the relationship between IL-17 and MHC Ⅱ expression and their relation with tumor growth.Methods The CD4+CD62L+ T cells purified by MACS were stimulated under cytokine conditions including anti-CD3,anti-CD28,TGF-β and IL-6 in vitro,and SUDHL-4 cells were cultured and inoculated the SCID mice to establish DLBCL mice models.The mice were divided into Th17 cells immunity group (30 mice) and control group (20 mice).Th17 cells were injected to mice to get the adoptive immunity in immunity group,and 0.9 ％ NaCl in control group.The half mice were terminated at median disease onset time and median survival time,respectively.ELISA was used to detect IL-17 expression,and immunohistochemistry was applied to detect MHC Ⅱ expression in the tumor tissues.Results The median disease onset time of DLBCL mice model was 8 d,and median survival time was 28 d.The IL-17 and MHC Ⅱ expression levels in Th17 cells immunity group [(11.93±0.56) pg/ml,(69.13t0.36) ％] were higher than those in control group [(9.82±0.26) pg/ml,(42.59±0.12) ％] (both P＜ 0.000 1).Along with the progress of DLBCL,IL-17 and MHC Ⅱ expression levels were decreased [(9.53±0.18) pg/ml,(54.63±0.45) ％,both P ＜ 0.000 1].There was a significantly positive correlation between IL-17 and MHC Ⅱ (r=0.89,P=0.000).Conclusions The expression level of MHC Ⅱ can be used as a factor to judge the disease situation of DLBCL,and combination detection of the expression of both IL-17 and MHC Ⅱ will provide more reference values for judgment of the disease situation and the progress of DLBCL.

Objective To study the effect and mechanism of down-regulating Silt2/Robo 1 signaling pathway on rabbit iliac artery after angioplasty restenosis. Methods The 30 male New Zealand white rabbits were divided randomly into 3 groups , namely the blank group , the control group , and the experimental group , 10 rabbits in each group. Hign-fat feeding , the rabbits were produced endothelial denudation of iliac artery stenosis model. Another 4 weeks of feeding , percutaneous balloon angioplasty was performed. Then R5 antibody was injected into the abdominal cavity. After 4 weeks of feeding ,angiography again. The results of angiography was analysied by image workstation. The concentrations of Slit2 and Robo1 was detected by ELISA. The iliac artery tissue examined by HE staining. Results The rabbit iliac artery after angioplasty restenosis animal model was set up successfully. Compared with the control group and the experimental group , the serum concentration of Slit2 and Robo1 were significantly higher (P < 0.01) than the blank group. But in the experimental group, the Slit2 and Robo1 serum concentrations were significantly lower than those in the control group (P < 0.05) after R5 antibody intervention. The area ratio stenosis and diameter stenosis rate of iliac artery were reduced that confirmed by angiography. Conclusion The expression of Slit2/Robo1 was significantly higher in the rabbit model of vascular restenosis. R5 antibody can effectively inhibit the expression of Slit2/Robo1. Down regulation of Slit2/Robo1 signaling pathway in the treatment of restenosis after angioplasty in rabbits.

OBJECTIVE: To investigate the common reasons for the failure of radical mastoidectomy in order to improve the result of treatment and obtain a dry ear. METHOD: Twenty-eight cases, who achieved no dry ear after radical mastoidectomy,underwent secondary surgery. RESULT: All cases obtained dry ear without vertigo or facial paralysis after operation and postoperative dressing. CONCLUSION The reasons for the failure of radical mastoidectomy result from the incomplete clearance of lesions, the insufficient ventilation of mastoid cavities, the inappropriate postoperative dressings or the residual foreign bodies in surgical cavity. It is the key points to achieve skeletonization adequately, to eliminate the pathological tissues thoroughly under microscope, and to ensure unobstructed drainage of surgical cavities for preventing secondary surgery.
Adolescent ; Adult ; Aged ; Cholesteatoma, Middle Ear ; surgery ; Female ; Humans ; Male ; Mastoid ; surgery ; Middle Aged ; Treatment Outcome ; Young Adult

The aim of the study is to construct two vectors for efficient expression of soluble recombinant proteins. The first vector was constructed by cloning the HisSUMO fragment into an expression vector pET30a(+) to fuse with the gene of interest (designated as HisSUMO Express). The second vector was constructed in the same way, but with a hydroxylamine cleavage site between HisSUMO and the gene of interest for an economic purpose (designated as HisSUMO Economic). The mouse fibroblast growth factor-21(mFGF-21), which was difficult to express in routine-used expression vectors, was taken as an example to test the vectors. The results showed that the mFGF-21 was expressed at high level in both vectors. The Sumo/mFGF-21 fusion protein accounted for more than 40% of the total bacterial protein. The fusion protein was purified with Ni-TNA column, and the HisSUMO was removed by cleavage of the fusion protein with either hydroxylamine solution or SUMO protease I. The concentration of the purified mFGF-21 mature protein was 54 mg/L and the recovery rate was 6%. The purified proteins derived from either hydroxylamine or SUMO protease I cleavage could stimulate glucose up-take by adipocytes. These results indicated that both HisSUMO Express and HisSUMO Economic were useful expression vectors for efficient expression of soluble recombinant proteins.
Animals ; Fibroblast Growth Factors ; biosynthesis ; genetics ; Genetic Vectors ; genetics ; Hydroxylamine ; chemistry ; Mice ; Peptide Hydrolases ; chemistry ; Recombinant Fusion Proteins ; biosynthesis ; genetics ; Solubility