Objective To compare the effect of single implanted microwave ablation in continuous and interval irradiating in ex vivo pig muscular tissues, and to provide the experimental data for microwave ablation therapy of uterine fibroid clinically. Methods The pig muscular tissues ablations were performed with 2450 MHz microwave at same output power and action time. The irradiating modes were set as continuous wave and interval wave (emitting per 100 seconds intermitting 10 seconds and 20 seconds). The shape, size, thermal field temperature and the pathologic appearance of the ablation zone were evaluated. Results With the same output power and the same action time,the difference observed in the ablated shape, scope, ahead distance and thermal field temperature had no statistical significance, and the pathologic appearances of the ablated zone were same among the different action modes. Conclusions The difference between continuous and interval microwave ablation effects had no statistical significance in ex vivo pig muscular tissues with single implanted microwave. Both of these two modes may apply for uterine fibroid microwave ablation,and may result in same therapeutic efficacy.

OBJECTIVE:To investigate the condition of ESBLs produced by E.coli isolated from urinary tract and the drug resistance of ESBLs-producing E.coli.METHODS:The identification of bacteria was performed using ATB-Expression analysator(France);the susceptibility test was performed using K-B method,and ESBLs were detected using disc diffusion confirmatory test.RESULTS:The detection rate of ESBLs-producing E.coli was 31.8%.All(100%)of the 107 strains of ESBLs-producing E.coli were sensitive to imipenem,however,in which different degree of resistance to other antibiotics was noted.The resistance rate was significantly higher in ESBLs-producing strains than in non-ESBLs-producing strains.CON-CLUSION:In view of the high antibiotic resistance of ESBLs-producing E.coli,great importance should be attached to the detection of the ESBLs.Antibiotics should be used rationally based on the results of susceptibility test.

Objective To unravel the possible mechanism of the role of recombinant human high mobility group box 1 (rhHMGB1) protein in regulating the angiogenesis of endothelial cells. Methods Endothelial cells were divided into the control group, bone marrow mesenchymal stem cells (MSC) supernatant group and rhHMGB1 group. The proliferation and survival of endothelial cells were detected by cell counting kit(CCK)-8 assay. The relative expression levels of vascular endothelial growth factor (VEGF), Yes-associated protein (YAP), CD31 and hypoxia inducible factor (HIF)-1α proteins were determined by Western blot. The relative expression levels of VEGF, YAP, CD31 and HIF-1α messenger RNA (mRNA) were detected by real-time fluorescent quantitative polymerase chain reaction (RT-qPCR). The migration ability of endothelial cells was assessed by Transwell chamber test. The localization of YAP was detected by immunofluorescence staining. Results Compared with the control group, the migration rate of endothelial cells was increased in the rhHMGB1 group (P < 0.05), and the cell migration rate was enhanced over time. Compared with the control group, the relative expression levels of VEGF and p-YAP proteins were up-regulated in the MSC supernatant group, and the differences were statistically significant (both P < 0.05). Compared with the control group, the relative expression levels of VEGF and HIF-1α proteins, VEGF and CD31 mRNA and YAP and p-YAP proteins were up-regulated, and YAP/p-YAP ratio was increased in the rhHMGB1 group, and the differences were statistically significant (all P < 0.05). Compared with the MSC supernatant group, the relative expression levels of CD31 mRNA and YAP protein were up-regulated, and the YAP/p-YAP ratio was increased in the rhHMGB1 group, and the differences were statistically significant (all P < 0.05). Conclusions Exogenous high-concentration rhHMGB1 may promote the migration ability of endothelial cells and up-regulate the expression levels of angiogenesis-related proteins by regulating the recruitment of YAP to the nucleus.

Objective To explore the safety and effectiveness of central venous catheter for thoracic drainage after esoph-agectomy.Methods We prospectively analyzed 95 patients who underwent esophagectomy for esophageal carcinoma in our de-partment from August 2016 to August 2017.Forty-six patients with central venous catheter drainage were observation group, and 49 patients with traditional chest-tube closed drainage were control group.Compared the differences of drainage amount, pain score, postoperative patient quality of life score, duration of drainage and chest tube incision healing between the two groups.Results There were no significant differences in daily drainage volume and patency of drainage tube between the two groups(P>0.05).Compared with the control group, the duration of thoracic drainage in the observation group was significant shorter, the pain intensity score was significant lower , and the emotional function of postoperative patient quality of life was sig-nificant better(P<0.01).There were more patients suffered uncomfortable symptoms, such as nausea, vomiting, pain, in-somnia in the control group(P<0.05).Conclusion The application of central venous catheter in thoracic drainage can de-crease the postoperative pain and improve the postoperative quality of life for esophageal carcinoma patients after esophagecto-my.It is safe and feasible for thoracic drainage after esophagectomy .

Objective To explore the effects of both folic acid,p16 protein expression and their interaction on progression of cervical cancerization.Methods Participants were pathologically diagnosed new cases,including 80 women with normal cervical (NC),55 patients with low-grade cervical intraepithelial neoplasia (CIN Ⅰ),55 patients with high-grade cervical intraepithelial neoplasia (CIN Ⅱ/Ⅲ) and 64 patients with cervical squamous cell carcinoma (SCC).Serum folate levels were detected by microbiological assay method while p16 protein expression levels were measured by Western-blot.In vitro,cervical cancer cell lines C33A (HPV negative) and Caski (HPV16 positive) were treated with different concentrations of folate.Proliferation and apoptosis of cells and the levels of p16 protein expression were measured in groups with different folic acid concentrations.Results Results showed that the levels of serum folate were (5.96± 3.93) ng/ml,(5.08±3.43) ng/ml,(3.92 ± 2.59) ng/ml and (3.18 ± 2.71) ng/ml,and the levels ofpl6 protein were 0.80 ± 0.32,1.33 ± 0.52,1.91 ± 0.77,and 2.09 ± 0.72 in the group of NC,CIN Ⅰ,CIN Ⅱ/Ⅲ and SCC,respectively.However,the levels of serum folate decreased (trend X2 =32.71,P＜ 0.001) and p 16 protein expression increased (trend x2=56.06,P＜0.001) gradually along with the severity of cervix lesions.An additive interaction was seen between serum folate deficiency and high expression of p l 6 protein in the CIN Ⅰ,CIN n/Ⅲ and SCC group.Results in vitro showed that,with the increase of folate concentration,the inhibition rate of cell proliferation (C33A:r=0.928,P=0.003;Caski:r=0.962,P=0.001) and the rate on cell apoptosis (C33A:r=0.984,P＜0.001;Caski:r=0.986,P＜0.001) all increased but the levels of p16 protein expression (C33A:r=-0.817,P=0.025;Caski:r=-0.871,P=0.011) reduced.The proliferation inhibition rate (C33A:r=-0.935,P=0.002;Caski:r=-0.963,P=0.001) and apoptosis rate of cells (C33A:r=-0.844,P=0.017;Caski:r=-0.898,P=0.006) were negatively correlated with the levels of p16 protein expression.Conclusions Our findings indicated that both serum folate deficiency and high expression of p16 protein could increase the risk of cervical cancer and cervix precancerous lesion,and there was an additive interaction between them.Our findings suggested that folic acid supplementation could reverse the abnormal expression of p16 protein,and effectively promote apoptosis and inhibit proliferation in cervical carcinoma cells.

Objective To explore the effect ofpolycyclic aromatic hydrocarbons (PAHs) and p16,FHIT gene CpG island methylation,as well as their interaction in cervical intraepithelial neoplasias.Methods Objects of this study were from a cohort of cervical lesions study in Yangqu county of Shanxi province.All the patients were diagnosed pathologically,that including 83 patients with high-grade cervical intraepithelial neoplasia (CIN Ⅱ/Ⅲ),86 patients with low-grade cervical intraepithelial neoplasia (C1N Ⅰ) and another 91 women under normal cervical (NC) condition.1-hydroxy pyrene in the urine was detected by high performance liquid chromatography (HPLC)while CpG island methylation status of tumor suppressor gene p16 and FHIT were measured by methylation-specifc polymerase chain reaction (MSP).Data were analyzed with Kruskal-Wallis H test,chi-square test and trend of chi-square test.Logistic regression models were used to estimate the odds ratio (OR) and corresponding 95％ confidence intervals (95％CI) between influencing factors and the cervical disease by using the SPSS statistical software (version 20.0).The interaction under study was evaluated by using the generalized multifactor dimensionality reduction (GMDR) model.Results Level of 1-hydroxy pyrene (H=50.743,P＜0.001) and the high exposure rate of 1-hydroxy pyrene (trend x2=20.146,P＜0.001) were gradually increasing along with the severity of cervical intraepithelial neoplasia.The CpG island methylation rates ofpl6,FHIT in CIN] and CIN Ⅱ/Ⅲl group were higher than that in NC group,and gradually increasing along with the severity of cervical intraepithelial neoplasia (trend x2=9.75,P=0.002;trend x 2 =10.39,P=0.001).Results from the GMDR model showed that interaction existed among the high exposure of l-hydroxy pyrene and the CpG island methylation ofpl6,FHIT in CIN Ⅰ and CIN Ⅱ]/Ⅲ group.Conclusion Under the high exposure of 1-hydroxy pyrene and the CpG island methylation of p16,FHIT appeared to have increased the risk of cervical intraepithelial neoplasia and causing synergistic effect in cervical intraepithelial neoplasia.

Objective To explore the effect of Src on cervical cancer cells through ERK signal transduction pathway.Methods Experimental study was carried out in vitro.Cervical cancer cell lines Hela (HPV-positive) and C33A (HPV-negative) were treated with Src kinase inhibitor PP2.Then,the cell cycle and apoptosis of each group were evaluated by using flow cytometry (FCM).Western blotting and Real-time PCR were used to detect the levels of the expression of ERK 1/2,c-Fos and c-Jun mRNA and protein respectively.The database was established and analyzed with SPSS statistical software (version 20.0).Results After down-regulating Src,the cell proliferation was inhibited and cell apoptosis was induced.The proportions of G0/G 1 stage of Hela and C33A cell in cell cycle increased while G2/M and S stages decreased.Meanwhile,the mRNA levels of ERK 1,ERK 2,c-Fos and c-Jun increased.And the expression levels of ERK 1/2,phosphorylated ERK 1/2 (p-ERK 1/2)and phosphorylated c-Fos (p-c-Fos) protein decreased,while c-Jun and phosphorylated c-Jun (p-c-Jun)protein expression increased.In addtion,the change level of Hela cell,p-ERK 1/2 and c-Fos protein were lower than that of C33A cell before and after the Src inhibition.Conclusions Src,involved in regulating the expression of key factors of the ERK signal transduction pathway including p-ERK 1/2 and p-c-Fos,might be capable of promoting the proliferation of cervical cancer cells and inhibiting their apoptosis.The infection with HPV might have adjustable effect on this process.

Objective: To explore the relationship between mobile phone dependence (MPD) and academic burden among junior middle school students in Guizhou Province, under the "double reduction" policy by using a multi level model, so as to provide a basis for preventing the occurrence of MPD. Methods: From December 2021 to January 2022, 7 868 students from grade 1 to grade 3 in 3 cities (prefecture) of Guizhou Province were selected by multi stage stratification random sampling method, and on site investigation was conducted by self compiled questionnaire and Self rating Questionnaire for Adolescent Problematic Mobile Phone Use(SQAPMPU). Using MLwiN 2.30 to fit a multi level model of the relationship between MPD and academic burden among junior middle school students. Results: The MPD detection rate of junior middle school students in Guizhou Province was 20.9%. The multi level model revealed that MPD of junior middle school students was clustered at the level of school and class ( χ 2= 1 565.32 , P <0.01), and high perceived academic pressure had a positive predictive effect on MPD among junior middle school students ( β =1.96). Homework duration ≥90 min/d at weekends had a negative predictive effect on MPD ( β =-0.55), while participation in off campus training on learning days had a positive predictive effect ( β =1.66)( P <0.05). Conclusion The MPD occurrence level is higher among junior middle school students in Guizhou Province. Perceived academic pressure, time spent on homework during weekends, off campus training and other academic burdens have an impact on MPD among junior middle school students, which should be a cause of concern for schools, families and social departments.

Objective To explore the relationship between serum miRNA-21 and miR-27b levels and prognosis of patients with renal clear cell carcinoma.Methods A total of 118 patients with renal clear cell carcinoma admitted to the Qinghai University Hospital from February 2019 to April 2021 were selected as the study subjects,and another 118 healthy patients in the same period as the control group.Real time fluorescence quantitative polymerase chain reaction(PCR)was used to detect the expression of miR-21 and miR-27b in the serum of all subjects.The relative expression levels of serum miR-21 and miR-27b between the patients with renal clear cell carcinoma and healthy control patients were compared.The expression and correlation of serum miR-21 and miR-27b in the patients with renal clear cell carcinoma of different pathological stages and Fuhrman grading were analyzed.The relationship between the expression of serum miR-21 and miR-27b and the survival and prognosis of the patients was explored as well.Results The expression levels of serum miR-21 and miR-27b in the patients with renal clear cell carcinoma were higher than those in the healthy control group(P＜0.05).The serum miR-21 expression level in stage Ⅲ patients was higher than in stageⅠ(P＜0.05),while the serum miR-21 expression level in the stage Ⅳ patients was higher than that in stagesⅠ,Ⅱ,and Ⅲ(P＜0.05).The expression level of miR-27b in the serum of patients gradually increased across the four stages,with a significant difference(P＜0.05).The pathological staging was positively correlated with the expression of miR-21 and miR-27b(P＜0.001).The expression levels of miR-21 and miR-27b in serum of patients gradually increased across grades Ⅰ,Ⅱ and Ⅲ by Fuhrman grading,with significant difference(P＜0.05).Fuhrman grading was positively correlated with the serum miR-21 and miR-27b expression(P＜0.001).There was a statistically significant difference in the survival curve between the miR-21 high expression group and the low expression group(P＜0.05).There was a statistically significant difference in the survival curve between the high expression group and the low expression group of miR-27b(P＜0.05).Conclusion The expression levels of serum miR-21 and miR-27b in patients with renal clear cell carcinoma is indicative of the progression and prognosis of the patient's condition.

Objective:To evaluate whether whole brain radiation therapy(WBRT) could benefit small cell lung cancer (SCLC) patients with brain metastases.Methods:Clinical data of 245 patients who were diagnosed with extensive stage SCLC with brain metastases admitted to our hospital from 2010 to 2020 were retrospectively analyzed. Among them, 168 patients received WRBT (WBRT group, radiation dose: 30Gy in 10 fractions), and 77 patients did not receive WBRT (non-WBRT group). All patients received 4-6 cycles of chemotherapy, and the chemotherapy regimen included cisplatin (or carboplatin) plus etoposide. One hundred and fifteen patients received thoracic radiotherapy. The endpoint was overall survival after brain metastases(BM-OS). Chi-square test was used to compare categorical data, and stabilized inverse probability of treatment weighting(sIPTW) was used to match the factors between WBRT and no-WBRT groups. Survival analysis was estimated by Kaplan-Meier method, and the log-rank test was used to compare survival curves between two groups. Results:The median BM-OS for the whole group of patients was 9.1 months, and 10.6 months and 6.7 months in the WBRT and non-WBRT groups, respectively( P=0.003). After balanced influencing factors with stabilized sIPTW, significant difference still existed in BM-OS between two groups( P=0.02). In 118 patients with synchronous brain metastases, the median BM-OS in two groups were 13.0 months and 9.6 months( P=0.007); and in 127 patients with metachronous brain metastases, the median BM-OS were 8.0 months and 4.1 months( P=0.003). In 50 patients without extracranial metastases, the median BM-OS were 13.3 months and 10.9 months( P=0.259)in two groups; while in 195 patients with extracranial metastases, the median BM-OS were 9.5 months and 5.9 months( P=0.009)in two groups. Conclusions:WBRT could prolong the OS in extensive stage SCLC patients with brain metastases.