Objective To Optimize the mandibular CT scanning methods with changing the scanning position,to reduce the radiation dosage.Methods Totally 50 consecutive patients with mandibular CT examination were enrolled in the study and divided into position-optimized group and routine group (n =25,respectively) randomly.The image quality,volume CT-dose index (CTDIvol),scanning length,and dose length product (DLP) were compared.Results There was no significant difference in subjective image quality and CTDIvol between two groups.But the scanning length and DLP in positionoptimized group were significantly reduced by about 20 ％ (t =4.986,P ＜ 0.05) and 16％ (t =3.682,P ＜0.05) compared with routine group.The lens were out of scanning field with the position-optimized protocol.Conclusions The scanning length would be efficiently reduced and the lens avoided with the position-optimized protocol,which would subsequently reduce the effective radiation dose.

Objective: To analyze the status quo of assanation and ethics courses and their social requirement, thus to explore a scientific mode for the course setting; Method: The course setting status quo of assanation and ethics is analyzed among 18 colleges in which the nursing speciality is set up. A questionnaire was also conducted to investigate students' inclination towards politics-sorted courses, and relevant data were analyzed. Results: The establishing rate of assanation courses in the higher professional colleges is higher than that in the comprehensive universities. The most favorable subjects among freshmen are the Chinese national political theories, and assanation & ethics, while the counterparts among seniors are assanation & ethics, law basis, and philosophy. Seniors have an obvious higher desire for the course of assanation & ethics compared with freshmen (P

Objective To evaluate clinical significance of two real-time fluorescence quantitative PCR kits for quantitative detection of HBV DNA and detection performance at different viral load levels.Methods A series of calibrators with different concentrations(1×106,5×105,1×105,5×104,1×104,5×103,1×103,5×102,1×102,1×101 kIU/L) were prepared with AB-type sera using the second generation WHO international standard (NIBSC code:97/750). HBV viral load in the sera of 78 patients,30 healthy blood donors and 10 calibrators were detected by real-time fluorescence quantitative PCR HBV DNA test kit from PIJI Bio-Technical Development Company Ltd (PG kit) and Cobas AmpliPrep/Cobas TaqMan HBV test kit. The correlation of the two methods was evaluated, and the performance of the two kits different viral load levels was evaluated. The false negative rate was analyzed. Negative control, low positive control and high positive control were included in every batch. Results Both two kits showed the correct results for the 10 specimens from the WHO international standards. The lowest detection limit of HBV DNA for Roche Cobas AmpliPrep/Cobas TaqMan HBV test and PG kit were 2.00 (kIU/L, lg) and 3.00 (kIU/L,lg) ,respectively. There was linear correlation between the results from Roche Cobas AmpliPrep/Cobas TaqMan HBV test and PG kit ( R2=0.938 7, P < 0.01 ), the upper limit of Roche kit had coincided with theoretical value. The samples with HBV DNA level above the upper limit of detection were diluted and retested to obtain the precise result. The result form Roche Cobas AmpliPrep/Cabas TaqMan HBV test [(8.35±0.20) kIU/L, lg] was higher than that from PG kit [(7.73±0.42 ) kIU/L, lg] (t=3. 776, P <0.05) . The detection of 108 serum samples showed that the level of HBV DNA detected by Roche Cobas AmpliPrep/Cobas TaqMan HBV test [(5.88±1.64) kIU/L, lg] was higher than that by PG kit [(5.25±1.55 kIU/L,lg] (t=12. 297 ,P <0.01 ). The correlation coefficients were high in samples with high HBV viral load[HBV DNA(>5.00 and≤7.00) kIU/L,Ig,R2=0. 779 7, P <0.01 ;HBV DNA( >7.00 ands≤9.00) kIU/L,lg,R2=0.603 7, P <0.01]. The correlation coefficient was low in samples with low HBV viral load[HBV DNA ( > 3.00 and≤5.00) kIU/L, lg, R2=0. 417 3, P <0.01 )]. When HBV DNA ( >3.00 and≤4.00) kIU/L,lg,the false negative rate was 33.3% (5/15). When HBV DNA ( > 1.08and≤3.00) kIU/L,lg,none of positive samples was detected with PG kit. Conclusions PG kit is not as good as Cobas AmpliPrep/Cobas TaqMan HBV test . The linear correlation between the results from the two kits is good. The correlation between the results detected with PG kit and Cobas AmpliPrep/Cobas TaqMan HBV test is higher in the high viral load groups than in the low viral load group. It is suggested that PG kit had a narrower linear range.

Objective To explore the role of specific AT rich sequence binding protein 1(SATB1) and wnt/β-catenin signaling pathways in the regulation of trophoblast invasion and its effect in the pathogenesis of preeclampsia. Methods From March 2013 to March 2014, 20 cases of human villous tissues (early pregnancy group) from women of 8-10 gestational weeks who received artificial abortion at the First Affiliated Hospital of Chongqing Medical University, 18 cases of placental tissues (mid-pregnancy group) from women of 18-20 gestational weeks who had labor induction by water bag, 20 cases of placental tissues (normal full-term group) from healthy full-term pregnancy women and 20 cases of placental tissues (preeclamptic group) from women with preeclampsia who received elective c-section in were collected. Immunohistochemical SP method was utilized to determine the position of SATB1 and beta-catenin in villous tissues or placental tissues. Western blot was performed to analyze the expression level of SATB1 and beta-catenin in villous tissues or placental tissues. Immunofluorescence assay was used to determine the location of SATB1 andβ-catenin in HTR8/SVneo cells. Western blot was performed to detect the expression level of SATB1 and beta-catenin in HTR8/SVneo cells cultured in normoxia and hypoxia reoxygenation(H/R) condition. Co-Immunoprecipitation detection was used to evaluate the interaction between SATB1 andβ-catenin in placental tissues in preeclamptic group and HTR8/SVneo cells in H/R group. Gelatin zymography analysis was used to measure the activity of matrix metalloproteinases(MMP)-2 and 9 in placental tissues from preeclamptic group and HTR8/SVneo cells in H/R group. Results (1) In the normal full-term group, rare syncytiotrophoblastic nodule, less fibrinoid necrosis and abundant numbers of capillary could be observed in placental tissues. In comparison, there were obvious vacuolation in the cytoblast of syncytiotrophoblast, rich fibrinoid necrosis and poor numbers of villous capillary in placental tissues from preeclamptic group. (2) SATB1 could be found by immunochemical staining in placenta or villous tissues from all the groups. The staining intensity of SATB1 were more weakening in preeclamptic group than in the normal full-term group. (3) β-catenin could be found by immunochemical staining in placenta or villous tissues from all the groups. The staining intensity of β-catenin were more weakening in preeclamptic group than in the normal full-term group. (4) The protein expression levels of SATB1 in early pregnancy group, mid-pregnancy group, normal full-term group and preeclamptic group were 0.300 ± 0.009, 0.271 ± 0.015, 0.238 ± 0.018 and 0.153 ± 0.007, respectively. The protein levels of β-catenin among the above groups were 0.743±0.041, 0.648±0.021, 0.549±0.069 and 0.269±0.047, respectively. Both the expression of SATB1 andβ-catenin protein were significant decreased in placental tissues from preeclamptic group compared with the other three groups. (5) The SATB1 andβ-catenin protein was located in nucleus of trophoblast and a small amount was in the cytoplasm. The fluorescence intensity of both SATB1 and β-catenin in the H/R group were significantly decreasing when compared to the normoxia group. (6) HTR8/SVneo cells in H/R group showed a significant decrease in both SATB1 andβ-catenin protein levels when compared to the normoxia group. The protein level of SATB1 in the normoxia group was 0.213 ± 0.005, while was 0.083 ± 0.021 in the H/R group. The protein level ofβ-catenin in the normoxia group was 0.797±0.081, and was 0.543±0.131 in the H/R group. (7) There was an interaction between SATB1 and β-catenin in placental tissues from the preeclamptic group and HTR8/SVneo cells exposed by H/R. (8) The enzymatic activity of MMP-2 and MMP-9 protein were decreased significantly in placental tissues from the preeclamptic group (2.251±0.310, 1.447 ± 0.102, respectively) when compared to the normal full-term group (7.098 ± 0.451, 5.502 ± 0.197, respectively). MMP-2 and MMP-9 were significantly decreased in the H/R group (0.471 ± 0.104, 0.297 ± 0.103, respectively) when compared to the normoxia group (0.842 ± 0.209, 0.595 ± 0.100, respectively). Conclusion The expression of SATB1 decreased in the placenta of preeclampsia. This may influence the activity of MMP-2 and 9 by regulating Wnt/β-catenin signaling pathways, affect trophoblast invasion and eventually result in preeclampsia.

Objective To investigate the relationship between the 5-hydroxytryptamine (5-HT)1A receptor gene C(-1019)G polymorphism and geriatric depression and Alzheimer′s disease (AD) with depressive symptoms in Han Chinese. Methods The case control study was used in the study among 106 patients with geriatric depression, 72 AD patients with depressive symptoms and 150 healthy old individuals in China. The C(-1019)G polymorphism of 5-HT1A was analyzed with the technique of polymerase chain reaction-restriction fragment length polymorphism. Results The frequencies of 5-HT1A genotype C/G (39.6%), G/G(24.5%) and allele G (44.3%) in the patients with geriatric depression were significantly higher than those in the controls (respectively 35.3%, 13.3%, 31.0%, P < 0.05). The frequencies of 5-HT1A G allele in the AD patients with depressive symptoms (41.0%) were significantly higher than those in the controls (31.0%,X2=4.2879, P<0.05). No significant difference in distribution of (5-HT)1A C (-1019) G polymorphism between the patients with geriatric depression and the AD patients with depressive symptoms was observed (P > 0.05). Conclusion The 5-HT1A gene C (-1019)G polymorphism may be associated with geriatric depression and AD with depressive symptoms and (-1019)G allele may be a risk factor for them.

Objective To determine the distribution of HCV genotypes in patients with chronic hepatitis C,study the distribution of genotype in different gender and the relationship between genotypes and serum HCV-RNA levels.Methods Two hundred and six cases of HCV RNA positive patients(all with relevant clinical data) receiving pegylated interferon therapy were collected from May to December 2010.HCV RNA was detected in 206 hepatitis C patients from 40 hospitals in China by Roche Cobas AmpliPrep/Cobas TaqMan HBV test,and genotype was determined by Abbott RealTime HCV G enotype Ⅱ .The distribution of genotypes in the gender was analyzed by chi-square test analysis.The relationship between genotypes and serum HCV RNA levels was detected by single factor analysis and two independent sample t test analysis.Results There were seven different subtypes of HCV in 206 samples,including genotype 1,7 cases(3.4% ,7/206); genotype 1a,2 cases(1.0%,2/206); genotype 1b,123 cases (59.7 %,123/206); genotype 2,32 cases(15.5 %,32/206); genotype 3,27 cases(13.1%,27/206); genotype 6,6 cases(2.9% ,6/206) ;genotype 1/6,5 cases(2.4% ,5/206) ;genotype 2/4,1 cases(0.5%,1/206).There was no significant difference between HCV genotype and gender in 132 cases with genotype 1 and 65 cases with non-genotype 1(genotype 2,3,6) (x2 = 0.000,P ＞ 0.05).There was significant association between quantity of HCV RNA and genotype in 188 patients with HCV(F = 3.371,P＜ 0.01).The 197 patients with HCV single genotype were divided into five groups in terms of region(East,South,West,North and Center).There was no significant difference between HCV genotype 1 and non-genotype 1 in the five groups(x2 = 5.840,P ＞ 0.05).Conclusions It is suggested that HCV 1 b is the most prevalent type in China,followed by HCV 2.There is no significant difference between HCV genotype and gender.The levels of HCV RNA with genotype 1b are significantly higher than those with genotype 3.The levels of HCV RNA with genotype 2 are significantly higher than those with genotype 3.The levels of HCV RNA with genotype 6 are significantly higher than those with genotype 3.

Objective To identify the differences inneuropsychological characteristics between amnestic(AMCI)and vascular mild cognitive impairment(VMCI).Methods Totally 297 old community residents with mild cognitive impairment(MCI)were divided into amnestic MCI(AMCI)and vascular MCI(VMCI)subgroup from Guangzhou MCI prevalence survey.The elderly with MCI were interviewed and tested with the Chinese version of Montreal Cognitive Assessment(MoCA),the Mini-Mental state examination(MMSE),Auditory Verbal Learning Test(AVLT),the Clinical Dementia Rating scale(CDR),Functional Activity Questionnaire(FAQ),the Modified Hachinski Ischemic Scale(M-HIS),Center for Epidemiologic Studies(CES-DC)to evaluate neuropsychological characteristics.Results AMCI versus VMCI group showed that the total scores of MoCA were(9.63±5.17 vs.9.98±6.02),total scores of MMSE were(16.90±4.84 vs.16.90±6.19),AVLT immediate memory was(2.35±1.39 vs.2.91±1.84),AVLT delayed recall was(2.23±2.09 vs.2.47±2.20),AVLT delayed recognition was(7.33±3.98 vs.6.85±4.02)and total scores of CDR(0.5 vs.0.5),with no differences between the 2 groups(all P>0.05).Based on MoCA survey,AMCI versus VMCI group showed statistically significant differences(all P<0.05)in parameters of visual space and execution(0.71±1.02 vs.0.92±1.26),language function(0.34±0.56 vs.0.50±0.80)and abstract thinking(0.25±0.49 vs.0.15±0.43),but based on MMSE survey,no difference was found in the various cognitive domains between the two groups.The AMCI versus VMCI group showed statistically significant differences(all P<0.05)in parameters of CES-DC scale(1.75±4.27 vs.2.76±6.72),FAQ scale(4.42±4.66 vs.8.71±7.03),M-HIS scale(0.40±0.64 vs.7.59±3.53).Conclusions There is no significant difference in general cognitive impairment between AMCI and VMCI,but the visual space and execution,language function are more impaired in AMCI than VMCI,and the abstract thinking,social function are more impaired with more depressive symptoms in VMCI than in AMCI.

Objective To explore the perioperative clinical treatment of thyroid cancer patients with heart disease. Methods A retrospective analysis was conducted on 39 thyroid cancer patients with heart disease admitted to the Department of Otorhinolaryngology Head and Neck Surgery, Beijing Anzhen Hospital, Capital Medical University from April 2014 to February 2018, including 25 males and 14 females, the age ranged from 59 to 75 years, with an average age of 67.3 ± 6.2 years. Perioperative clinical monitoring indicators included cardiac ultrasound left ventricular ejection fraction (LVEF), degree of vascular stenosis revealed by coronary CT, hypersensitive troponin I (TNI), b-type natriuretic peptide (BNP), fibrinogen degradation products, and coagulation indexes. This panel of patients comprised 26 cases with 50％ ≤LVEF<60％, 10 cases with 40％ ≤ LVEF<50％, 3 cases with 36％≤LVEF<40％, 27 cases with 0≤BNP<100 ng/L, 7 cases with 100≤BNP<400 ng/L, and 5 cases with 400≤BNP<700 ng/L. Coronary CT showed no coronary artery stenosis>75％. The vascular graft was patent and the coronary artery after stenting was unobstructed. For 3 patients with LVEF<40％ and 5 patients with BNP>400 ng/L,cardiotonic,diuretic,and nutritional myocardial therapy were used for 1 week. SPSS 17.0 software was used to analyze the data. Results All 39 patients successfully completed the operation under general anesthesia,including 32 cases of total thyroidectomy,7 cases of glandular lobe and isthmic resection,and 40 cases of lateral neck dissection. One patient developed heart failure three days after surgery and was discharged after two weeks of treatment . No other cardiac related events,cerebrovascular and pulmonary thrombosis occurred during the perioperative period. The anesthesia preparation time was significant different between the group with 0≤BNP<100 ng/L and 50％≤LVEF<60％ and the group with 0≤BNP<100 ng / L and 36％≤LVEF<50％. Conclusions Multi-indicators were utilized to adequately assess cardiac function before surgery. According to the results of cardiac ultrasound and coronary CT examination, the corresponding treatment should be conducted to improve the cardiac function. After the perioperative risk assessment and management of thyroid cancer patients with heart disease,standardized thyroid cancer surgery can be performed safely.

Objective To evaluate the prevalence and risk factors of metabolic syndrome among hepatitis C patients in Chinese Han population .Methods This was a multicenter ,cross-sectional study . A total of 997 Chinese Han patients with hepatitis C virus (HCV) infection were enrolled .Demographic data ,anthropometric data and clinical parameters related to metabolic syndrome were collected .Statistical analysis was performed by t-test (normal distribution) or Mann-Whitney U two-sample test (non-normal distribution) and χ test .Binary logistic regression analyses were used to determine the parameters significantly related to metabolic syndrome .Results Among the 997 patients ,170 (17 .1%) patients were diagnosed with metabolic syndrome .Binary logistic regression showed that genotype 2 (OR＝1 .594 ;95% CI :1 .045－2 .431 , P＝ 0 .030) ,older age (OR＝ 1 .040 ;95% CI :1 .022 －1 .058 , P＜ 0 .01) , overweight (OR＝3 .876 ;95% CI :2 .593－5 .792 ,P＜0 .01) ,fatty liver history (OR＝2 .106 ;95% CI : 1 .384－3 .204 ,P＝0 .001) ,homeostasis model assessment insulin (HOMA-IR) (OR＝1 .263 ;95% CI :1 .118－1 .427 , P＜0 .01) ,fasting insulin (OR＝0 .949 ;95% CI :0 .915 －0 .985 , P＝0 .006) ,lower serum albumin level (OR＝0 .957 ;95% CI :0 .915 －1 .000 , P＝0 .049) and higher γ-GT level (OR＝1 .004 ;95% CI :1 .000 －1 .008 , P＝ 0 .0041 ) were all significantly associated with the presence of metabolic syndrome .Conclusions Hepatitis C patients with genotype 2 ,older age ,overweight ,fatty liver history ,higher HOMA-IR ,lower fasting insulin level ,lower serum albumin level or higher γ-GT level should be screened for metabolic syndrome .

Objective: To explore the perioperative clinical treatment of thyroid cancer patients with heart disease. Methods: A retrospective analysis was conducted on 39 thyroid cancer patients with heart disease admitted to the Department of Otorhinolaryngology Head and Neck Surgery, Beijing Anzhen Hospital,Capital Medical University from April 2014 to February 2018,including 25 males and 14 females, the age ranged from 59 to 75 years,with an average age of 67.3±6.2 years. Perioperative clinical monitoring indicators included cardiac ultrasound left ventricular ejection fraction (LVEF), degree of vascular stenosis revealed by coronary CT, hypersensitive troponin I (TNI), b-type natriuretic peptide (BNP), fibrinogen degradation products,and coagulation indexes. This panel of patients comprised 26 cases with 50% ≤ LVEF<60%,10 cases with 40% ≤ LVEF<50%, 3 cases with 36% ≤ LVEF<40%, 27 cases with 0≤BNP<100 ng/L, 7 cases with 100≤BNP<400 ng/L, and 5 cases with 400≤BNP<700 ng/L. Coronary CT showed no coronary artery stenosis>75%. The vascular graft was patent and the coronary artery after stenting was unobstructed. For 3 patients with LVEF<40% and 5 patients with BNP>400 ng/L,cardiotonic,diuretic,and nutritional myocardial therapy were used for 1 week. SPSS 17.0 software was used to analyze the data. Results: All 39 patients successfully completed the operation under general anesthesia,including 32 cases of total thyroidectomy,7 cases of glandular lobe and isthmic resection,and 40 cases of lateral neck dissection. One patient developed heart failure three days after surgery and was discharged after two weeks of treatment. No other cardiac related events,cerebrovascular and pulmonary thrombosis occurred during the perioperative period. The anesthesia preparation time was significant different between the group with 0≤BNP<100 ng/L and 50%≤LVEF<60% and the group with 0≤BNP<100 ng/L and 36%≤LVEF<50%. Conclusions Multi-indicators were utilized to adequately assess cardiac function before surgery. According to the results of cardiac ultrasound and coronary CT examination, the corresponding treatment should be conducted to improve the cardiac function. After the perioperative risk assessment and management of thyroid cancer patients with heart disease,standardized thyroid cancer surgery can be performed safely.