Objective To observe the correlations of quantitative parameters of contrast-enhanced ultrasound(CEUS),micro-flow imaging(MFI)and shear wave elastography(SWE)with tumor microenvironment(TME)acidification in nude mice MCF7 breast cancer.Methods MCF7 human breast cancer cells were injected subcutaneously into 20 BALB/c-nu nude mice,and modeling was regarded as successful when tumor grew to 150-200 mm3.Then,CEUS,MFI and SWE were performed to obtain relevant parameters,including time-intensity curve(TIC)parameters(peak intensity[PI],area under the curve[AUC]),vessel index(VI)and maximum,median and mean Youngs modulus(Emax,Emed,Emean).Tumor pH value was measured using fluorescence quenching method,and its correlation with CEUS,MFI and SWE parameters were analyzed.Results pH value of MCF7 breast cancer tissue in nude mice was 6.05-6.43,with an average of 6.27±0.05,which in high perfusion area was significantly higher than in low perfusion area(P＜0.001).PI and AUC of TIC and VI were all positively correlated with pH value(r=0.661,0.611,0.768,all P＜0.001),while Emax,Emed and Emean were negatively correlated with pH value(r=-0.490,-0.562,-0.571,all P＜0.001).Conclusion TIC parameters and VI of MCF7 breast cancer in nude mice were positively correlated with TME acidification,while Emax,Emed and Emean were negatively correlated with TME acidification.

Objective To observe the correlations of quantitative parameters of contrast-enhanced ultrasound(CEUS),micro-flow imaging(MFI)and shear wave elastography(SWE)with tumor microenvironment(TME)acidification in nude mice MCF7 breast cancer.Methods MCF7 human breast cancer cells were injected subcutaneously into 20 BALB/c-nu nude mice,and modeling was regarded as successful when tumor grew to 150-200 mm3.Then,CEUS,MFI and SWE were performed to obtain relevant parameters,including time-intensity curve(TIC)parameters(peak intensity[PI],area under the curve[AUC]),vessel index(VI)and maximum,median and mean Youngs modulus(Emax,Emed,Emean).Tumor pH value was measured using fluorescence quenching method,and its correlation with CEUS,MFI and SWE parameters were analyzed.Results pH value of MCF7 breast cancer tissue in nude mice was 6.05-6.43,with an average of 6.27±0.05,which in high perfusion area was significantly higher than in low perfusion area(P＜0.001).PI and AUC of TIC and VI were all positively correlated with pH value(r=0.661,0.611,0.768,all P＜0.001),while Emax,Emed and Emean were negatively correlated with pH value(r=-0.490,-0.562,-0.571,all P＜0.001).Conclusion TIC parameters and VI of MCF7 breast cancer in nude mice were positively correlated with TME acidification,while Emax,Emed and Emean were negatively correlated with TME acidification.

OBJECTIVE: To explore the genetic basis for a child featuring X-linked intellectual disability. METHODS: The 1-year-and-6-month-old child presented with growth retardation, intellectual disability and bilateral alternating squint. With DNA extracted from the child and his parents' peripheral venous blood samples, whole exome sequencing was carried out to identify potential variants that can explain his condition. Suspected variants were validated by Sanger sequencing. The impact of variants was predicted by bioinformatic tools. RESULTS: The child was found to harbor a de novo nonsense c.3163C>T (p.Arg1055*) variant of the IQSEC2 gene. The variant, unreported previously, was predicted to be pathogenic based on MutationTaster, PROVEAN and SIFT. Analysis using a HomoloGene system suggested Arg1055 in IQSEC2 residues to be highly conserved evolutionarily, and that replacement of Arg1055 may cause destroy of the PH domain (AA 951-1085) and serious damage to the function of IQSEC2 protein. Analysis with UCSF chimera software suggested that the c.3163C>T (p.Arg1055*) variant can induce serious damages to the secondary structures of IQSEC2 protein, causing loss of its function. CONCLUSION The patient's condition may be attributed to the de novo nonsense variant c.3163C>T (p.Arg1055*) of the IQSEC2 gene.

Objective To investigate the molecular background of the New Delhi-metallo-1 (NDM-1)-producing Morganella morganii.Methods Two carbapenem-resistant M.morganii named 1 and 2 were isolated in the Second Hospital of Jiaxing,Zhejiang on October 4th and 29th,respectively.Antimicrobial susceptibility was determined by agar dilution method.Pulsed-field gel electrophoresis (PFGE) was performed to analyse the homololgy of isolates.Amplification with specific primers,DNA sequencing,conjugation experiments and genetic environment analysis were conducted to investigate the molecular mechanisms of resistance.Results The two M.morganii isolates were resistant to carbapenem and fluoroquinolones,while susceptible to aztreonam.PFGE analysis indicated that the two isolates were distinguishable.Amplification and DNA sequencing confirmed the coexistence of blaNDM-1,blasHv-12,qnrS1 and aac(6')-Ib-cr in both isolates.Transconjugants were detected with blaNDM.1 and qnrS1 simultaneously.Genetic environment analysis demonstrated that the blaNDM-1-bleMBL-trpF-dsbC-cutA1 structure was in consistence with those from known blaNDM-1-carrying Klebsiella pneumoniae.Conclusion The blaNDM-1 in M.morganii isolates possiblely obtained from K.pneumoniae through translatable plasmids.

Objective To evaluate the therapeutic effetive,toxicity and survial rate of non-operation esophageal carcinoma patients treated by tegafur plus cisplatin combined with three-dimensional conformal radiotherapy (3D-CRT).Methods 184 cases of non-operation patients with esophageal carcinoma were divided into two groups.The cases of treatment group were treated by cisplatin and tegafur.The cases of control group were treated by cisplatin and 5-Fu.All patients received 3D-CRT,and the total radiation dose was 50-70 Gy.Each group had 14 cases treated with primary chemotherapy for 1 course,28 cases for 2 courses,and 50 cases without any chemotherapy.Results The recent effect rate was 69.57 ％ (64/92) in treatment group and 67.39 ％ (62/92) in control group,there was no statistical difference (x2 =0.101,P =0.874).Radioactive esophagitis and leukopenia were the main side effect of treatment.The treatment group was significantly lower than that of the control group,the difference had statistical significance.The 1-,2-and 3-year survival rates were 74.9 ％,61.6 ％,52.8 ％,respectively in treatment group and 75.8 ％,56.9 ％,48.0 ％,respectively in control group.The control group survival rates were significantly higher than the treatment group,the difference had statistical significance (x2 =7.325,P =0.007).Conclusions Cisplatin plus tegafur or 5-Fu combined with 3D-CRT is effective way of treatment for non-operation of esophageal carcinoma.The toxicity of cisplatin plus tegafur group is significantly lower than cisplatin plus 5-Fu group,therefor it can improve the quality of life of the patients obviously.

AIM:To evaluate the efficacy and safety of the regimen based on platinum compound plus docetaxel in the treatment of advanced esophageal carcinoma as first-line drug,and to further explore prognostic factors of advanced esophageal carcinoma by survival analysis.METHODS:From August 2006 to October 2008,36 patients with advanced esophageal carcinoma were enrolled in the study,and non-randomly assigned to docetaxel 75 mg/m2 in the first day every 3 weeks,combined with cisplatin 25 mg/m2 in the first day to third day or in the first day to forth day(DT,n=27),or with carboplatin AUC=5 on day 1(CT,n=9).RESULTS:The curative and toxic side effects were evaluated to the 36 patients.There were 1 complete respone,17 partial respone,11 no changes and 7 progressive disease in 36 patients with total response rate of 50.00%.The response rates of DT,CT regimen were 59.26% and 22.22%(P=0.121).The major side effects were nausea-vomiting,all side effects were reversible by symptomatic treatment.After a median follow-up of 8.70 months,the overall median survival was 10.50 months(95% CI 7.36 to 13.64 months).The COX univariate regression analysis suggested there was no correlation with sex,age and the hemoglobin of before chemotherapy with existence.But there was statistical significance between the behavior state of chemotherapy and the existence(P=0.036).CONCLUSION:The regimen based on platinum compound plus docetaxel is tolerable and more effective as a first-line treatment for advanced esophageal carcinoma.Patients with good performance status before chemotherapy indicates good prognosis and it is an independent factor affecting survival for advanced esophageal carcinoma.

Objective To investigate the constitutive characteristics and the change trend of gynecologic malignant tumors in hospitalized patients in Guangxi Zhuang Autonomous Region over the recent 20 years.Methods Clinical data of 8009 in-patients who suffered from gynecologic malignant tumors in 23 hospitals from 1985 to 2004 in Guangxi Zhuang Autonomous Region were analyzed,with respect to the tumor types and change trend.Results(1)The leading 4 types of malignant tumors were cervical cancers, ovarian cancers,endometrial cancers,and malignant trophoblastic tumors according to the constitutive ratios of the tumors.The constitutive ratio of cervical cancer patients rose year by year,from 17.48% during the 1985-1989 period to 49.25% during the 2000-2004 period(P0.05).(2)The occurring age of cervical cancers became younger obviously,from≥60 years old dropped to